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Atacicept in Multiple Sclerosis Extension Study, Phase II

An Open-label, Multicenter Phase II Extension of Study 28063 (ATAMS) to Obtain Long-term Follow-up Data in Subjects With Relapsing Multiple Sclerosis Treated With Atacicept for up to 5 Years (ATAMS-Extension)

Status
Terminated
Phases
Phase 2
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT00853762
Acronym
ATAMS ext
Enrollment
74
Registered
2009-03-02
Start date
2009-03-31
Completion date
2011-02-28
Last updated
2017-03-20

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Relapsing Multiple Sclerosis

Brief summary

This study (28851) is a long-term follow-up study of subjects enrolled in ATAMS study 28063 (NCT00642902). The aim of this study is to monitor the safety and tolerability of atacicept administered for up to 5 years to subjects with relapsing multiple sclerosis (RMS). This extension study consists of two parts. Part A will be double blind and Part B will be open label. During Part A, subjects initially randomized to atacicept will continue to receive the atacicept dose to which they have been randomized in study 28063 (ATAMS) once a week subcutaneously (under the skin). Subjects randomized to placebo in ATAMS will receive atacicept at 150 mg once a week subcutaneously during Part A. Once the results of ATAMS are available and the atacicept dose with the best benefit / risk ratio has been identified, all subjects will be switched to this dose and will continue the extension study open-label (Part B). Throughout the study, subjects and investigators will remain blinded with respect to initial and part A treatment allocation/dose.

Interventions

Subjects who received atacicept 25 milligram (mg) subcutaneously (SC) as loading dose twice weekly for first 4 weeks, followed by atacicept 25 mg SC for 32 weeks, in 28063 study will continue with atacicept 25 mg SC once weekly up to 5 years or up to early termination of treatment or early termination of the study.

Subjects who received atacicept 75 mg SC as loading dose twice weekly for first 4 weeks, followed by atacicept 75 mg SC for 32 weeks, in 28063 study will continued with atacicept 75 mg SC once weekly up to 5 years or up to early termination of treatment or early termination of the study.

Subjects who received atacicept 150 mg SC as loading dose twice weekly for first 4 weeks, followed by atacicept 150 mg SC for 32 weeks, in 28063 study will continue with atacicept 150 mg SC once weekly up to 5 years or up to early termination of treatment or early termination of the study.

Sponsors

Merck KGaA, Darmstadt, Germany
CollaboratorINDUSTRY
EMD Serono
Lead SponsorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
QUADRUPLE (Subject, Caregiver, Investigator, Outcomes Assessor)

Eligibility

Sex/Gender
ALL
Age
18 Years to 60 Years
Healthy volunteers
No

Inclusion criteria

* Participation in study 28063. * Completion of Week 36 visit of the core study 28063. * Willingness and ability to comply with study procedures for the duration of the study. * Voluntary provision of written informed consent (including, for the USA, subject authorization under the Health Insurance Portability and Accountability Act (HIPAA)), given before any study-related procedure that is not part of normal medical care and with the understanding that the subject may withdraw consent at any time without prejudice to his or her future medical care.

Exclusion criteria

* Premature discontinuation of core study 28063. * Subjects who meet criteria listed below will receive IMP in study 28851: * Subjects who are eligible for participation in extension study 28851 but do not meet these criteria will not be treated with IMP but will undergo scheduled visits, irrespective of their treatment. * All subjects must satisfy the following criteria before Extension Study Day 1 (D1-EXT; defined as the first day of dosing in the extension study) to be eligible for treatment with IMP: * Eligibility for participation in extension study 28851. * For women of childbearing potential, a negative urine pregnancy test at eligibility assessment. * Female subjects of childbearing potential must be willing to avoid pregnancy by using an adequate method of contraception for four (4) weeks before the first dose administered within the extension study, during the study and for twelve (12) weeks after the last dose of trial medication. Adequate contraception is defined as two barrier methods, or one barrier method with spermicide, or an intrauterine device, or use of a combined oral female hormonal contraceptive (or the definitions requested by health authorities and locally amended in the core study 28063). For the purposes of this trial, women of childbearing potential are defined as: All female subjects after puberty unless they are post-menopausal for at least two years or are surgically sterile (For Germany Only: Female subjects of childbearing potential must be willing to avoid pregnancy by using highly effective methods of contraception for approximately four (4) weeks prior to D1-EXT, during and for twelve (12) weeks after the last dose of trial medication. This requirement does not apply to surgically sterile subjects or to subjects who are postmenopausal for at least 2 years. Highly effective contraception is defined as any method or combination of methods which result in a low failure rate (i.e. less than (\<) 1% per year) when used consistently and correctly, such as implants, injectables, combined oral contraceptives, sexual abstinence, vasectomized partner, 2 barrier methods, or 1 barrier method with spermicide) * Willingness and ability to comply with study procedures for the duration of the study. * To be eligible for treatment with investigational medicinal product (IMP) in study 28851, the subjects must not meet any of the following criteria: * Non-eligibility for participation in extension study 28851 (premature discontinuation of core study 28063). * Major protocol violation or non-compliance in the core study. * Use of prohibited immunomodulatory / immunosuppressive therapies * Serum immunoglobulin G (IgG) level \<3 gram per liter (g/L) if the subject received atacicept in the core study, or serum IgG level \<6 g/L if the subject received placebo in the core study (to protect the blinding of the core study, the IgG level will be communicated to the treating physician only if it is too low for extension study participation and only after all Week 36 assessments performed within the core study have been completed). * Any condition, including laboratory findings that, in the opinion of the Investigator, constitutes a risk or a contraindication for participation in the extension study, or that could interfere with the study objectives, conduct or evaluation. * Known active clinically significant acute or chronic infection, or any major episode of infection requiring hospitalization or treatment with parenteral anti-infectives. * Investigator judgement that treatment of the subject with atacicept in the extension study is not appropriate. * Aspartate aminotransferase (AST), or alanine aminotransferase (ALT), or alkaline phosphatase (AP) level greater than (\>)2.5 x upper limit of normal (ULN), or total bilirubin \>1.5 x ULN at eligibility assessment. * Clinically significant abnormality in any hematological test (e.g. hemoglobin \<100 g/L (6.21 millimoles per liter \[mmol/L\]), white blood cells \<3 x 10\^9 per liter (/L), platelets \<100 x 10\^9/L) at eligibility assessment. * Clinically significant abnormality on electrocardiogram (ECG) performed at eligibility assessment. * Presence of uncontrolled or New York Health Association (NYHA) class 3 or 4 congestive heart failure at Week 36 of the core study. * Moderate to severe renal impairment (creatinine clearance \<50 milliliter per minute (mL/min) according to Cockcroft-Gault equation). * Allergy or hypersensitivity to gadolinium (Gd). * Allergy or hypersensitivity to atacicept or to any of the components of the formulated atacicept. * Diagnosis or family history of Creutzfeldt-Jakob disease (CJD).

Design outcomes

Primary

MeasureTime frameDescription
Number of Subjects With Treatment Emergent Adverse Events (TEAEs), Serious TEAEs, Injection Site Reactions, Infections, and Malignancies by SeverityFrom the first dose of study drug administration up to Week 24TEAEs were defined as AEs with a start date after or on the date of the first DB treatment injection in ATAMS Extension and that occurred anytime after treatment discontinuation, or up to the day before first Rebif® rescue medication injection in ATAMS Extension. A serious TEAE was an AE that resulted in any of the following: death; life threatening; persistent/significant disability/incapacity; initial or prolonged inpatient hospitalization; congenital anomaly/birth defect. TEAE severity was graded as per Qualitative Toxicity Scale. Local injection site reactions (injection site: pain, redness, itching and swelling) throughout ATAMS Extension, starting after the first trial medication administration. If the subject experienced 1 or more of the above injection site symptoms, these were reported with the AE verbatim term injection site reaction. For all randomized subjects, there was an option of rescue treatment with Rebif® for 1 year beginning with the first injection of Rebif®).
Change From Baseline in Vital Signs: Systolic Blood Pressure (SBP) and Diastolic Blood Pressure (DBP)Baseline, Week 2, 4, 8, 12, 16, 20, 24 and 36Blood pressure (systolic and diastolic) was measured after at least 3 minutes resting, with the subject in the seated position.
Change From Baseline in Vital Signs: Pulse RateBaseline, Week 2, 4, 8, 12, 16, 20, 24 and 36
Change From Baseline in Vital Signs: TemperatureBaseline, Week 2, 4, 8, 12, 16, 20, 24 and 36
Change From Baseline in Electrocardiogram (ECGs)Baseline, Week 12 and 36
Number of Subjects With Worsened Post Baseline Shift in Immunoglobulin A (IgA), IgG and IgM LevelsBaseline up to Week 36Number of subjects with shifts from normal Grade (Grade 0) at Baseline to worse value at post-baseline (Grade 1 to Grade 4) according to the following criteria: IgA Grade 0: greater than or equal to (\>=) lower limit normal (LLN) 0.7 gram per liter (g/L); Grade 1: less than (\<) LLN - 0.5 g/L, Grade 2: \<0.5g/L -0.3 g/L, Grade 3: \<0.3 g/L -0.1 g/L, Grade 4: \< 0.1 g/L; IgG Grade 0: \>= LLN (7 g/L), Grade 1: \< LLN - 5 g/L, Grade 2: \<5g/L -4 g/L, Grade 3: \<4 g/L -3 g/L and Grade 4: \< 3 g/L; IgM Grade 0: \>= LLN (0.4 g/L), Grade 1: \< LLN - 0.3 g/L, Grade 2: \<0.3 g/L -0.2 g/L, Grade 3: \<0.2 g/L -0.1 g/L, and Grade 4: \< 0.1 g/L are presented in this outcome measure.
Number of Subjects With Positive Neutralizing Antibody (NAb)Baseline, Week 12 and 36

Secondary

MeasureTime frameDescription
Number of Subjects With Clinical Attacks/RelapsesBaseline up to Week 24A clinical attack/relapse was defined as the fulfillment of all the following criteria: 1. Neurological abnormality, either newly appearing or re-appearing, with abnormality specified by both i) neurological abnormality separated by at least 30 days from onset of a preceding clinical event, and ii) neurological abnormality lasting for at least 24 hours. 2. Absence of fever or known infection (fever with temperature (axillary, orally, or intra-auriculary) \> 37.5°C/99.5 °Fahrenheit). 3. Objective neurological impairment, correlating with the subject's reported symptoms, defined as either i) increase in at least 1 of the functional systems of the Expanded Disability Status Scale (EDSS), or ii) increase of the total EDSS score. EDSS overall score ranging from 0 (normal) to 10 (death due to MS) was calculated.
Pharmacogenetics/Pharmacogenomics AnalysisDay 1 and Week 36Gene expression profiling and gene polymorphism identification were to be used to identify putative markers for response to treatment. * Genome-wide gene polymorphism characterization by genome-wide scan. * Targeted gene polymorphism identification of B-Lymphocyte Stimulator (BLyS) , APRIL, (receptor for B cell activating factor of the tumor necrosis factor \[TNF\] family) BAFF-R, (Transmembrane Activator) TACI and (B Cell Maturation Antigen) BCMA and HLA-DRB1 by direct genotyping or sequencing .
Change From Baseline in Expanded Disability Status Scale (EDSS) Scores at Week 12Baseline, Week 12EDSS is an ordinal scale in half-point increments that qualifies disability in participants with multiple sclerosis (MS). It assesses the 8 functional systems (visual, brainstem, pyramidal, cerebellar, sensory, bowel/bladder, cerebral and other) as well as ambulation. EDSS overall score ranging from 0 (normal) to 10 (death due to MS) was calculated.
Change in Multiple Sclerosis Functional Composite (MSFC) Score at Week 12Week 12The MSFC is a multidimensional clinical outcome measure which consists of three sub-tests; Timed 25-Foot Walk, 9-Hole Peg Test and Paced Auditory Serial Addition Test-3(PASAT-3). The Timed 25-Foot Walk is a quantitative measure of lower extremity function. The 9-Hole Peg Test is a quantitative measure of upper extremity (arm and hand) function. The PASAT is a measure of cognitive function that specifically assesses auditory information processing speed and flexibility, as well as calculation ability. Standardized results (Z-scores) of these sub-tests and the overall MSFC Z-score as an average of these three Z-scores was calculated. Higher Z-scores reflect better neurological function and a positive change from baseline indicates improvement. An increase in score indicates an improvement (range -3 to +3).
Magnetic Resonance Imaging (MRI) Parameters: Number of T1 Gadolinium (Gd)-Enhancing Lesions Per SubjectBaseline, Week 12 and 24
Magnetic Resonance Imaging (MRI) Parameters: Volume of T2 Lesions (New or Enlarging T2 Lesions) Per SubjectBaseline, Week 12 and Week 24
Concentrations of Free and Total AtaciceptBaseline and Week 12
Free B-Lymphocyte Stimulator (BLyS) and Free A Proliferation-Inducing Ligand (APRIL) Serum Concentrations.Baseline, Week 12 and 36Levels of free APRIL and free BLyS: Free APRIL serum samples were to be analyzed by using a validated enzyme-linked immunosorbent assay (ELISA) with limits of detection of 0.3125 nanogram per milliliter (ng/mL) for free APRIL and free BlyS serum samples were analysed using a validated ELISA with limits of detection of 1.56 ng/mL.

Countries

Australia, Belgium, Canada, Czechia, France, Germany, Lebanon, Lithuania, Netherlands, New Caledonia, Russia, Spain, Sweden, Switzerland, Ukraine, United Kingdom, United States

Participant flow

Recruitment details

First/last participant (informed consent): 03 March 2009/13 August 2009. Last participant completed: 09 September 2009.

Pre-assignment details

A total of 324 subjects were screened and 255 were enrolled in ATAMS (28063; NCT00642902). Overall, 75 subjects randomized and treated in ATAMS were eligible to enter ATAMS Extension. However, 74 subjects were included in ATAMS Extension and 1 subject could not enter due to the premature termination of the trial.

Participants by arm

ArmCount
Atacicept 25 mg (With Loading)
Subjects who received atacicept 25 mg SC as loading dose twice weekly for first 4 weeks, followed by atacicept 25 mg SC for 32 weeks, in 28063 study were continued with atacicept 25 mg SC once weekly up to 5 years or up to early termination of treatment or early termination of the study.
16
Atacicept 75 mg (With Loading)
Subjects who received atacicept 75 mg SC as loading dose twice weekly for first 4 weeks, followed by atacicept 75 mg SC for 32 weeks, in 28063 study were continued with atacicept 75 mg SC once weekly up to 5 years or up to early termination of treatment or early termination of the study.
19
Atacicept 150 mg (With Loading)
Subjects who received atacicept 150 mg SC as loading dose twice weekly for first 4 weeks, followed by atacicept 150 mg SC for 32 weeks, in 28063 study were continued with atacicept 150 mg SC once weekly up to 5 years or up to early termination of treatment or early termination of the study.
17
Atacicept 150 mg (Without Loading)
Subjects who received placebo SC twice weekly for first 4 weeks, followed by placebo SC for 32 weeks, in 28063 study were continued with atacicept 150 mg (without loading dose) SC once weekly up to 5 years or up to early termination of treatment or early termination of the study.
22
Total74

Withdrawals & dropouts

PeriodReasonFG000FG001FG002FG003
Overall StudyOther0200
Overall StudyPremature Termination16151421
Overall StudyProtocol Violation0001
Overall StudyRandomised but not Treated0220
Overall StudyWithdrawal by Subject0010

Baseline characteristics

CharacteristicAtacicept 25 mg (With Loading)Atacicept 75 mg (With Loading)Atacicept 150 mg (With Loading)Atacicept 150 mg (Without Loading)Total
Age, Continuous39.4 years
STANDARD_DEVIATION 8.4
36.8 years
STANDARD_DEVIATION 9.1
37.4 years
STANDARD_DEVIATION 11.2
34.4 years
STANDARD_DEVIATION 8.6
36.8 years
STANDARD_DEVIATION 9.3
Sex: Female, Male
Female
8 Participants12 Participants8 Participants16 Participants44 Participants
Sex: Female, Male
Male
8 Participants7 Participants9 Participants6 Participants30 Participants

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
EG002
affected / at risk
EG003
affected / at risk
deaths
Total, all-cause mortality
— / —— / —— / —— / —
other
Total, other adverse events
6 / 169 / 178 / 1512 / 22
serious
Total, serious adverse events
0 / 161 / 170 / 150 / 22

Outcome results

Primary

Change From Baseline in Electrocardiogram (ECGs)

Time frame: Baseline, Week 12 and 36

Population: No summary tables were prepared for ECG parameters, and ECG data were not formally analyzed. However, a qualitative assessment of ECG morphology and rhythm was made by the Investigator and recorded in the electronic case report form (eCRF). ECG abnormalities considered significant by the investigator were reported as AEs.

Primary

Change From Baseline in Vital Signs: Pulse Rate

Time frame: Baseline, Week 2, 4, 8, 12, 16, 20, 24 and 36

Population: Double-blind safety analysis set included all the subjects who received at least 1 dose of trial medication in the ATAMS extension study. Here 'n' signifies those subjects who were evaluable for the specified category.

ArmMeasureGroupValue (MEAN)Dispersion
Atacicept 25 mg (With Loading)Change From Baseline in Vital Signs: Pulse RateWeek 2 (n=15, 13, 14, 21)-2.1 beats per minute (beats/min)Standard Deviation 5.1
Atacicept 25 mg (With Loading)Change From Baseline in Vital Signs: Pulse RateWeek 4 (n=15, 14, 12, 21)0.6 beats per minute (beats/min)Standard Deviation 8.7
Atacicept 25 mg (With Loading)Change From Baseline in Vital Signs: Pulse RateWeek 8 (n=13, 11, 12, 16)-1.7 beats per minute (beats/min)Standard Deviation 9.2
Atacicept 25 mg (With Loading)Change From Baseline in Vital Signs: Pulse RateWeek 12 (n=11, 12, 8, 16)-0.5 beats per minute (beats/min)Standard Deviation 6.2
Atacicept 25 mg (With Loading)Change From Baseline in Vital Signs: Pulse RateWeek 16 (n=7, 9, 6, 12)3.9 beats per minute (beats/min)Standard Deviation 4.7
Atacicept 25 mg (With Loading)Change From Baseline in Vital Signs: Pulse RateWeek 20 (n=3, 7, 2, 6)-0.3 beats per minute (beats/min)Standard Deviation 2.1
Atacicept 25 mg (With Loading)Change From Baseline in Vital Signs: Pulse RateWeek 24 (n=2, 4, 1, 6)2.5 beats per minute (beats/min)Standard Deviation 0.7
Atacicept 25 mg (With Loading)Change From Baseline in Vital Signs: Pulse RateWeek 36 (n=0, 1, 0, 0)NA beats per minute (beats/min)
Atacicept 75 mg (With Loading)Change From Baseline in Vital Signs: Pulse RateWeek 20 (n=3, 7, 2, 6)3.9 beats per minute (beats/min)Standard Deviation 8.3
Atacicept 75 mg (With Loading)Change From Baseline in Vital Signs: Pulse RateWeek 16 (n=7, 9, 6, 12)1.1 beats per minute (beats/min)Standard Deviation 10.5
Atacicept 75 mg (With Loading)Change From Baseline in Vital Signs: Pulse RateWeek 4 (n=15, 14, 12, 21)-0.6 beats per minute (beats/min)Standard Deviation 9.2
Atacicept 75 mg (With Loading)Change From Baseline in Vital Signs: Pulse RateWeek 36 (n=0, 1, 0, 0)7.0 beats per minute (beats/min)
Atacicept 75 mg (With Loading)Change From Baseline in Vital Signs: Pulse RateWeek 24 (n=2, 4, 1, 6)-5.3 beats per minute (beats/min)Standard Deviation 9.4
Atacicept 75 mg (With Loading)Change From Baseline in Vital Signs: Pulse RateWeek 12 (n=11, 12, 8, 16)0.7 beats per minute (beats/min)Standard Deviation 9.5
Atacicept 75 mg (With Loading)Change From Baseline in Vital Signs: Pulse RateWeek 8 (n=13, 11, 12, 16)-3.4 beats per minute (beats/min)Standard Deviation 9.1
Atacicept 75 mg (With Loading)Change From Baseline in Vital Signs: Pulse RateWeek 2 (n=15, 13, 14, 21)-3.5 beats per minute (beats/min)Standard Deviation 5.5
Atacicept 150 mg (With Loading)Change From Baseline in Vital Signs: Pulse RateWeek 24 (n=2, 4, 1, 6)-22.0 beats per minute (beats/min)
Atacicept 150 mg (With Loading)Change From Baseline in Vital Signs: Pulse RateWeek 8 (n=13, 11, 12, 16)1.3 beats per minute (beats/min)Standard Deviation 8.7
Atacicept 150 mg (With Loading)Change From Baseline in Vital Signs: Pulse RateWeek 12 (n=11, 12, 8, 16)-1.5 beats per minute (beats/min)Standard Deviation 8.9
Atacicept 150 mg (With Loading)Change From Baseline in Vital Signs: Pulse RateWeek 16 (n=7, 9, 6, 12)-0.2 beats per minute (beats/min)Standard Deviation 4.8
Atacicept 150 mg (With Loading)Change From Baseline in Vital Signs: Pulse RateWeek 20 (n=3, 7, 2, 6)-5.0 beats per minute (beats/min)Standard Deviation 9.9
Atacicept 150 mg (With Loading)Change From Baseline in Vital Signs: Pulse RateWeek 36 (n=0, 1, 0, 0)NA beats per minute (beats/min)
Atacicept 150 mg (With Loading)Change From Baseline in Vital Signs: Pulse RateWeek 2 (n=15, 13, 14, 21)-3.8 beats per minute (beats/min)Standard Deviation 10.4
Atacicept 150 mg (With Loading)Change From Baseline in Vital Signs: Pulse RateWeek 4 (n=15, 14, 12, 21)0.7 beats per minute (beats/min)Standard Deviation 8.2
Atacicept 150 mg (Without Loading)Change From Baseline in Vital Signs: Pulse RateWeek 8 (n=13, 11, 12, 16)4.4 beats per minute (beats/min)Standard Deviation 12.4
Atacicept 150 mg (Without Loading)Change From Baseline in Vital Signs: Pulse RateWeek 12 (n=11, 12, 8, 16)4.5 beats per minute (beats/min)Standard Deviation 9.5
Atacicept 150 mg (Without Loading)Change From Baseline in Vital Signs: Pulse RateWeek 4 (n=15, 14, 12, 21)2.0 beats per minute (beats/min)Standard Deviation 8
Atacicept 150 mg (Without Loading)Change From Baseline in Vital Signs: Pulse RateWeek 2 (n=15, 13, 14, 21)3.6 beats per minute (beats/min)Standard Deviation 11.4
Atacicept 150 mg (Without Loading)Change From Baseline in Vital Signs: Pulse RateWeek 16 (n=7, 9, 6, 12)3.8 beats per minute (beats/min)Standard Deviation 9.1
Atacicept 150 mg (Without Loading)Change From Baseline in Vital Signs: Pulse RateWeek 36 (n=0, 1, 0, 0)NA beats per minute (beats/min)
Atacicept 150 mg (Without Loading)Change From Baseline in Vital Signs: Pulse RateWeek 24 (n=2, 4, 1, 6)9.0 beats per minute (beats/min)Standard Deviation 5.3
Atacicept 150 mg (Without Loading)Change From Baseline in Vital Signs: Pulse RateWeek 20 (n=3, 7, 2, 6)11.0 beats per minute (beats/min)Standard Deviation 8.8
Primary

Change From Baseline in Vital Signs: Systolic Blood Pressure (SBP) and Diastolic Blood Pressure (DBP)

Blood pressure (systolic and diastolic) was measured after at least 3 minutes resting, with the subject in the seated position.

Time frame: Baseline, Week 2, 4, 8, 12, 16, 20, 24 and 36

Population: Double-blind safety analysis set included all the subjects who received at least 1 dose of trial medication in the ATAMS extension study. Here 'n' signifies those subjects who were evaluable for the specified category.

ArmMeasureGroupValue (MEAN)Dispersion
Atacicept 25 mg (With Loading)Change From Baseline in Vital Signs: Systolic Blood Pressure (SBP) and Diastolic Blood Pressure (DBP)DBP: Week 12 (n=11, 12, 8, 16)-3.8 millimeter of mercury (mmHg)Standard Deviation 11.1
Atacicept 25 mg (With Loading)Change From Baseline in Vital Signs: Systolic Blood Pressure (SBP) and Diastolic Blood Pressure (DBP)DBP: Week 2 (n=15, 13, 14, 21)-2.1 millimeter of mercury (mmHg)Standard Deviation 8.2
Atacicept 25 mg (With Loading)Change From Baseline in Vital Signs: Systolic Blood Pressure (SBP) and Diastolic Blood Pressure (DBP)DBP: Week 4 (n=15, 14, 12, 21)-0.5 millimeter of mercury (mmHg)Standard Deviation 9
Atacicept 25 mg (With Loading)Change From Baseline in Vital Signs: Systolic Blood Pressure (SBP) and Diastolic Blood Pressure (DBP)DBP: Week 8 (n=13, 11, 12, 16)-2.8 millimeter of mercury (mmHg)Standard Deviation 7.7
Atacicept 25 mg (With Loading)Change From Baseline in Vital Signs: Systolic Blood Pressure (SBP) and Diastolic Blood Pressure (DBP)SBP: Week 36 (n=0, 1, 0, 0)NA millimeter of mercury (mmHg)
Atacicept 25 mg (With Loading)Change From Baseline in Vital Signs: Systolic Blood Pressure (SBP) and Diastolic Blood Pressure (DBP)DBP: Week 16 (n=7, 9, 6, 12)-1.6 millimeter of mercury (mmHg)Standard Deviation 14.2
Atacicept 25 mg (With Loading)Change From Baseline in Vital Signs: Systolic Blood Pressure (SBP) and Diastolic Blood Pressure (DBP)DBP: Week 20 (n=3, 7, 2, 6)-2.0 millimeter of mercury (mmHg)Standard Deviation 17.1
Atacicept 25 mg (With Loading)Change From Baseline in Vital Signs: Systolic Blood Pressure (SBP) and Diastolic Blood Pressure (DBP)DBP: Week 24 (n=2, 4, 1, 6)0.0 millimeter of mercury (mmHg)Standard Deviation 0
Atacicept 25 mg (With Loading)Change From Baseline in Vital Signs: Systolic Blood Pressure (SBP) and Diastolic Blood Pressure (DBP)DBP: Week 36 (n=0, 1, 0, 0)NA millimeter of mercury (mmHg)
Atacicept 25 mg (With Loading)Change From Baseline in Vital Signs: Systolic Blood Pressure (SBP) and Diastolic Blood Pressure (DBP)SBP: Week 2 (n = 13, 16, 14, 20)2.6 millimeter of mercury (mmHg)Standard Deviation 8.3
Atacicept 25 mg (With Loading)Change From Baseline in Vital Signs: Systolic Blood Pressure (SBP) and Diastolic Blood Pressure (DBP)SBP: Week 4 (n = 15, 14, 12, 21)2.1 millimeter of mercury (mmHg)Standard Deviation 7.9
Atacicept 25 mg (With Loading)Change From Baseline in Vital Signs: Systolic Blood Pressure (SBP) and Diastolic Blood Pressure (DBP)SBP: Week 8 (n = 13, 11, 12, 16)0.8 millimeter of mercury (mmHg)Standard Deviation 10.5
Atacicept 25 mg (With Loading)Change From Baseline in Vital Signs: Systolic Blood Pressure (SBP) and Diastolic Blood Pressure (DBP)SBP: Week 12 (n = 11, 12, 8, 16)3.0 millimeter of mercury (mmHg)Standard Deviation 11.7
Atacicept 25 mg (With Loading)Change From Baseline in Vital Signs: Systolic Blood Pressure (SBP) and Diastolic Blood Pressure (DBP)SBP: Week 16 (n=7, 9, 6, 12)5.9 millimeter of mercury (mmHg)Standard Deviation 13.4
Atacicept 25 mg (With Loading)Change From Baseline in Vital Signs: Systolic Blood Pressure (SBP) and Diastolic Blood Pressure (DBP)SBP: Week 20 (n=3, 7, 2, 6)2.0 millimeter of mercury (mmHg)Standard Deviation 23.1
Atacicept 25 mg (With Loading)Change From Baseline in Vital Signs: Systolic Blood Pressure (SBP) and Diastolic Blood Pressure (DBP)SBP: Week 24 (n=2, 4, 1, 6)5.0 millimeter of mercury (mmHg)Standard Deviation 7.1
Atacicept 75 mg (With Loading)Change From Baseline in Vital Signs: Systolic Blood Pressure (SBP) and Diastolic Blood Pressure (DBP)SBP: Week 24 (n=2, 4, 1, 6)-5.0 millimeter of mercury (mmHg)Standard Deviation 4.1
Atacicept 75 mg (With Loading)Change From Baseline in Vital Signs: Systolic Blood Pressure (SBP) and Diastolic Blood Pressure (DBP)SBP: Week 36 (n=0, 1, 0, 0)-18.0 millimeter of mercury (mmHg)
Atacicept 75 mg (With Loading)Change From Baseline in Vital Signs: Systolic Blood Pressure (SBP) and Diastolic Blood Pressure (DBP)DBP: Week 24 (n=2, 4, 1, 6)-6.3 millimeter of mercury (mmHg)Standard Deviation 2.5
Atacicept 75 mg (With Loading)Change From Baseline in Vital Signs: Systolic Blood Pressure (SBP) and Diastolic Blood Pressure (DBP)DBP: Week 2 (n=15, 13, 14, 21)-1.9 millimeter of mercury (mmHg)Standard Deviation 8.4
Atacicept 75 mg (With Loading)Change From Baseline in Vital Signs: Systolic Blood Pressure (SBP) and Diastolic Blood Pressure (DBP)DBP: Week 4 (n=15, 14, 12, 21)-0.4 millimeter of mercury (mmHg)Standard Deviation 8.7
Atacicept 75 mg (With Loading)Change From Baseline in Vital Signs: Systolic Blood Pressure (SBP) and Diastolic Blood Pressure (DBP)SBP: Week 20 (n=3, 7, 2, 6)-9.7 millimeter of mercury (mmHg)Standard Deviation 14.8
Atacicept 75 mg (With Loading)Change From Baseline in Vital Signs: Systolic Blood Pressure (SBP) and Diastolic Blood Pressure (DBP)DBP: Week 8 (n=13, 11, 12, 16)-1.6 millimeter of mercury (mmHg)Standard Deviation 8.7
Atacicept 75 mg (With Loading)Change From Baseline in Vital Signs: Systolic Blood Pressure (SBP) and Diastolic Blood Pressure (DBP)SBP: Week 16 (n=7, 9, 6, 12)-9.0 millimeter of mercury (mmHg)Standard Deviation 18.6
Atacicept 75 mg (With Loading)Change From Baseline in Vital Signs: Systolic Blood Pressure (SBP) and Diastolic Blood Pressure (DBP)DBP: Week 36 (n=0, 1, 0, 0)-8.0 millimeter of mercury (mmHg)
Atacicept 75 mg (With Loading)Change From Baseline in Vital Signs: Systolic Blood Pressure (SBP) and Diastolic Blood Pressure (DBP)SBP: Week 2 (n = 13, 16, 14, 20)-3.0 millimeter of mercury (mmHg)Standard Deviation 9.5
Atacicept 75 mg (With Loading)Change From Baseline in Vital Signs: Systolic Blood Pressure (SBP) and Diastolic Blood Pressure (DBP)DBP: Week 12 (n=11, 12, 8, 16)-4.8 millimeter of mercury (mmHg)Standard Deviation 8.1
Atacicept 75 mg (With Loading)Change From Baseline in Vital Signs: Systolic Blood Pressure (SBP) and Diastolic Blood Pressure (DBP)SBP: Week 4 (n = 15, 14, 12, 21)-2.4 millimeter of mercury (mmHg)Standard Deviation 13.7
Atacicept 75 mg (With Loading)Change From Baseline in Vital Signs: Systolic Blood Pressure (SBP) and Diastolic Blood Pressure (DBP)DBP: Week 20 (n=3, 7, 2, 6)-4.4 millimeter of mercury (mmHg)Standard Deviation 6
Atacicept 75 mg (With Loading)Change From Baseline in Vital Signs: Systolic Blood Pressure (SBP) and Diastolic Blood Pressure (DBP)SBP: Week 8 (n = 13, 11, 12, 16)-2.1 millimeter of mercury (mmHg)Standard Deviation 12
Atacicept 75 mg (With Loading)Change From Baseline in Vital Signs: Systolic Blood Pressure (SBP) and Diastolic Blood Pressure (DBP)DBP: Week 16 (n=7, 9, 6, 12)-2.9 millimeter of mercury (mmHg)Standard Deviation 9
Atacicept 75 mg (With Loading)Change From Baseline in Vital Signs: Systolic Blood Pressure (SBP) and Diastolic Blood Pressure (DBP)SBP: Week 12 (n = 11, 12, 8, 16)-5.8 millimeter of mercury (mmHg)Standard Deviation 15.3
Atacicept 150 mg (With Loading)Change From Baseline in Vital Signs: Systolic Blood Pressure (SBP) and Diastolic Blood Pressure (DBP)SBP: Week 8 (n = 13, 11, 12, 16)-1.1 millimeter of mercury (mmHg)Standard Deviation 12.5
Atacicept 150 mg (With Loading)Change From Baseline in Vital Signs: Systolic Blood Pressure (SBP) and Diastolic Blood Pressure (DBP)DBP: Week 36 (n=0, 1, 0, 0)NA millimeter of mercury (mmHg)
Atacicept 150 mg (With Loading)Change From Baseline in Vital Signs: Systolic Blood Pressure (SBP) and Diastolic Blood Pressure (DBP)SBP: Week 36 (n=0, 1, 0, 0)NA millimeter of mercury (mmHg)
Atacicept 150 mg (With Loading)Change From Baseline in Vital Signs: Systolic Blood Pressure (SBP) and Diastolic Blood Pressure (DBP)DBP: Week 12 (n=11, 12, 8, 16)-3.5 millimeter of mercury (mmHg)Standard Deviation 9.9
Atacicept 150 mg (With Loading)Change From Baseline in Vital Signs: Systolic Blood Pressure (SBP) and Diastolic Blood Pressure (DBP)SBP: Week 12 (n = 11, 12, 8, 16)-3.4 millimeter of mercury (mmHg)Standard Deviation 10.2
Atacicept 150 mg (With Loading)Change From Baseline in Vital Signs: Systolic Blood Pressure (SBP) and Diastolic Blood Pressure (DBP)SBP: Week 20 (n=3, 7, 2, 6)-0.5 millimeter of mercury (mmHg)Standard Deviation 0.7
Atacicept 150 mg (With Loading)Change From Baseline in Vital Signs: Systolic Blood Pressure (SBP) and Diastolic Blood Pressure (DBP)DBP: Week 2 (n=15, 13, 14, 21)-3.6 millimeter of mercury (mmHg)Standard Deviation 10.6
Atacicept 150 mg (With Loading)Change From Baseline in Vital Signs: Systolic Blood Pressure (SBP) and Diastolic Blood Pressure (DBP)DBP: Week 24 (n=2, 4, 1, 6)0.0 millimeter of mercury (mmHg)
Atacicept 150 mg (With Loading)Change From Baseline in Vital Signs: Systolic Blood Pressure (SBP) and Diastolic Blood Pressure (DBP)DBP: Week 16 (n=7, 9, 6, 12)-2.3 millimeter of mercury (mmHg)Standard Deviation 4.2
Atacicept 150 mg (With Loading)Change From Baseline in Vital Signs: Systolic Blood Pressure (SBP) and Diastolic Blood Pressure (DBP)SBP: Week 4 (n = 15, 14, 12, 21)-5.1 millimeter of mercury (mmHg)Standard Deviation 12.6
Atacicept 150 mg (With Loading)Change From Baseline in Vital Signs: Systolic Blood Pressure (SBP) and Diastolic Blood Pressure (DBP)DBP: Week 4 (n=15, 14, 12, 21)-5.1 millimeter of mercury (mmHg)Standard Deviation 9.2
Atacicept 150 mg (With Loading)Change From Baseline in Vital Signs: Systolic Blood Pressure (SBP) and Diastolic Blood Pressure (DBP)SBP: Week 2 (n = 13, 16, 14, 20)-1.2 millimeter of mercury (mmHg)Standard Deviation 10.7
Atacicept 150 mg (With Loading)Change From Baseline in Vital Signs: Systolic Blood Pressure (SBP) and Diastolic Blood Pressure (DBP)SBP: Week 24 (n=2, 4, 1, 6)10.0 millimeter of mercury (mmHg)
Atacicept 150 mg (With Loading)Change From Baseline in Vital Signs: Systolic Blood Pressure (SBP) and Diastolic Blood Pressure (DBP)SBP: Week 16 (n=7, 9, 6, 12)-2.0 millimeter of mercury (mmHg)Standard Deviation 12.2
Atacicept 150 mg (With Loading)Change From Baseline in Vital Signs: Systolic Blood Pressure (SBP) and Diastolic Blood Pressure (DBP)DBP: Week 8 (n=13, 11, 12, 16)-5.9 millimeter of mercury (mmHg)Standard Deviation 10.2
Atacicept 150 mg (With Loading)Change From Baseline in Vital Signs: Systolic Blood Pressure (SBP) and Diastolic Blood Pressure (DBP)DBP: Week 20 (n=3, 7, 2, 6)2.0 millimeter of mercury (mmHg)Standard Deviation 4.2
Atacicept 150 mg (Without Loading)Change From Baseline in Vital Signs: Systolic Blood Pressure (SBP) and Diastolic Blood Pressure (DBP)DBP: Week 8 (n=13, 11, 12, 16)0.1 millimeter of mercury (mmHg)Standard Deviation 11
Atacicept 150 mg (Without Loading)Change From Baseline in Vital Signs: Systolic Blood Pressure (SBP) and Diastolic Blood Pressure (DBP)DBP: Week 12 (n=11, 12, 8, 16)-2.4 millimeter of mercury (mmHg)Standard Deviation 10.3
Atacicept 150 mg (Without Loading)Change From Baseline in Vital Signs: Systolic Blood Pressure (SBP) and Diastolic Blood Pressure (DBP)DBP: Week 16 (n=7, 9, 6, 12)-1.6 millimeter of mercury (mmHg)Standard Deviation 7.7
Atacicept 150 mg (Without Loading)Change From Baseline in Vital Signs: Systolic Blood Pressure (SBP) and Diastolic Blood Pressure (DBP)SBP: Week 16 (n=7, 9, 6, 12)-2.3 millimeter of mercury (mmHg)Standard Deviation 10
Atacicept 150 mg (Without Loading)Change From Baseline in Vital Signs: Systolic Blood Pressure (SBP) and Diastolic Blood Pressure (DBP)DBP: Week 20 (n=3, 7, 2, 6)3.7 millimeter of mercury (mmHg)Standard Deviation 6.3
Atacicept 150 mg (Without Loading)Change From Baseline in Vital Signs: Systolic Blood Pressure (SBP) and Diastolic Blood Pressure (DBP)SBP: Week 24 (n=2, 4, 1, 6)-5.3 millimeter of mercury (mmHg)Standard Deviation 7.7
Atacicept 150 mg (Without Loading)Change From Baseline in Vital Signs: Systolic Blood Pressure (SBP) and Diastolic Blood Pressure (DBP)DBP: Week 24 (n=2, 4, 1, 6)-1.0 millimeter of mercury (mmHg)Standard Deviation 9.8
Atacicept 150 mg (Without Loading)Change From Baseline in Vital Signs: Systolic Blood Pressure (SBP) and Diastolic Blood Pressure (DBP)DBP: Week 36 (n=0, 1, 0, 0)NA millimeter of mercury (mmHg)
Atacicept 150 mg (Without Loading)Change From Baseline in Vital Signs: Systolic Blood Pressure (SBP) and Diastolic Blood Pressure (DBP)SBP: Week 2 (n = 13, 16, 14, 20)-0.2 millimeter of mercury (mmHg)Standard Deviation 9.8
Atacicept 150 mg (Without Loading)Change From Baseline in Vital Signs: Systolic Blood Pressure (SBP) and Diastolic Blood Pressure (DBP)SBP: Week 20 (n=3, 7, 2, 6)3.3 millimeter of mercury (mmHg)Standard Deviation 6
Atacicept 150 mg (Without Loading)Change From Baseline in Vital Signs: Systolic Blood Pressure (SBP) and Diastolic Blood Pressure (DBP)SBP: Week 4 (n = 15, 14, 12, 21)-0.1 millimeter of mercury (mmHg)Standard Deviation 9.9
Atacicept 150 mg (Without Loading)Change From Baseline in Vital Signs: Systolic Blood Pressure (SBP) and Diastolic Blood Pressure (DBP)SBP: Week 8 (n = 13, 11, 12, 16)0.4 millimeter of mercury (mmHg)Standard Deviation 11
Atacicept 150 mg (Without Loading)Change From Baseline in Vital Signs: Systolic Blood Pressure (SBP) and Diastolic Blood Pressure (DBP)SBP: Week 36 (n=0, 1, 0, 0)NA millimeter of mercury (mmHg)
Atacicept 150 mg (Without Loading)Change From Baseline in Vital Signs: Systolic Blood Pressure (SBP) and Diastolic Blood Pressure (DBP)DBP: Week 2 (n=15, 13, 14, 21)0.3 millimeter of mercury (mmHg)Standard Deviation 8.6
Atacicept 150 mg (Without Loading)Change From Baseline in Vital Signs: Systolic Blood Pressure (SBP) and Diastolic Blood Pressure (DBP)SBP: Week 12 (n = 11, 12, 8, 16)-0.9 millimeter of mercury (mmHg)Standard Deviation 11.3
Atacicept 150 mg (Without Loading)Change From Baseline in Vital Signs: Systolic Blood Pressure (SBP) and Diastolic Blood Pressure (DBP)DBP: Week 4 (n=15, 14, 12, 21)0.1 millimeter of mercury (mmHg)Standard Deviation 7.7
Primary

Change From Baseline in Vital Signs: Temperature

Time frame: Baseline, Week 2, 4, 8, 12, 16, 20, 24 and 36

Population: Double-blind safety analysis set included all the subjects who received at least 1 dose of trial medication in the ATAMS extension study. Here 'n' signifies those subjects who were evaluable for the specified category.

ArmMeasureGroupValue (MEAN)Dispersion
Atacicept 25 mg (With Loading)Change From Baseline in Vital Signs: TemperatureWeek 2 (n=15, 13, 14, 21)-0.09 Degree CelsiusStandard Deviation 0.27
Atacicept 25 mg (With Loading)Change From Baseline in Vital Signs: TemperatureWeek 16 (n=7, 9, 6, 12)-0.10 Degree CelsiusStandard Deviation 0.21
Atacicept 25 mg (With Loading)Change From Baseline in Vital Signs: TemperatureWeek 36 (n=0, 1, 0, 0)NA Degree Celsius
Atacicept 25 mg (With Loading)Change From Baseline in Vital Signs: TemperatureWeek 4 (n=15, 14, 12, 21)-0.03 Degree CelsiusStandard Deviation 0.24
Atacicept 25 mg (With Loading)Change From Baseline in Vital Signs: TemperatureWeek 20 (n=3, 7, 2, 6)-0.37 Degree CelsiusStandard Deviation 0.35
Atacicept 25 mg (With Loading)Change From Baseline in Vital Signs: TemperatureWeek 8 (n=13, 11, 12, 16)-0.03 Degree CelsiusStandard Deviation 0.4
Atacicept 25 mg (With Loading)Change From Baseline in Vital Signs: TemperatureWeek 12 (n=11, 12, 8, 16)0.02 Degree CelsiusStandard Deviation 0.19
Atacicept 25 mg (With Loading)Change From Baseline in Vital Signs: TemperatureWeek 24 (n=2, 4, 1, 6)0.05 Degree CelsiusStandard Deviation 0.07
Atacicept 75 mg (With Loading)Change From Baseline in Vital Signs: TemperatureWeek 12 (n=11, 12, 8, 16)0.08 Degree CelsiusStandard Deviation 0.36
Atacicept 75 mg (With Loading)Change From Baseline in Vital Signs: TemperatureWeek 8 (n=13, 11, 12, 16)0.05 Degree CelsiusStandard Deviation 0.1
Atacicept 75 mg (With Loading)Change From Baseline in Vital Signs: TemperatureWeek 20 (n=3, 7, 2, 6)0.16 Degree CelsiusStandard Deviation 0.56
Atacicept 75 mg (With Loading)Change From Baseline in Vital Signs: TemperatureWeek 36 (n=0, 1, 0, 0)0.70 Degree Celsius
Atacicept 75 mg (With Loading)Change From Baseline in Vital Signs: TemperatureWeek 16 (n=7, 9, 6, 12)0.17 Degree CelsiusStandard Deviation 0.35
Atacicept 75 mg (With Loading)Change From Baseline in Vital Signs: TemperatureWeek 4 (n=15, 14, 12, 21)0.05 Degree CelsiusStandard Deviation 0.42
Atacicept 75 mg (With Loading)Change From Baseline in Vital Signs: TemperatureWeek 2 (n=15, 13, 14, 21)0.09 Degree CelsiusStandard Deviation 0.27
Atacicept 75 mg (With Loading)Change From Baseline in Vital Signs: TemperatureWeek 24 (n=2, 4, 1, 6)0.30 Degree CelsiusStandard Deviation 0.59
Atacicept 150 mg (With Loading)Change From Baseline in Vital Signs: TemperatureWeek 24 (n=2, 4, 1, 6)0.00 Degree Celsius
Atacicept 150 mg (With Loading)Change From Baseline in Vital Signs: TemperatureWeek 2 (n=15, 13, 14, 21)0.03 Degree CelsiusStandard Deviation 0.21
Atacicept 150 mg (With Loading)Change From Baseline in Vital Signs: TemperatureWeek 4 (n=15, 14, 12, 21)0.03 Degree CelsiusStandard Deviation 0.24
Atacicept 150 mg (With Loading)Change From Baseline in Vital Signs: TemperatureWeek 8 (n=13, 11, 12, 16)0.03 Degree CelsiusStandard Deviation 0.28
Atacicept 150 mg (With Loading)Change From Baseline in Vital Signs: TemperatureWeek 36 (n=0, 1, 0, 0)NA Degree Celsius
Atacicept 150 mg (With Loading)Change From Baseline in Vital Signs: TemperatureWeek 12 (n=11, 12, 8, 16)0.09 Degree CelsiusStandard Deviation 0.57
Atacicept 150 mg (With Loading)Change From Baseline in Vital Signs: TemperatureWeek 16 (n=7, 9, 6, 12)-0.05 Degree CelsiusStandard Deviation 0.23
Atacicept 150 mg (With Loading)Change From Baseline in Vital Signs: TemperatureWeek 20 (n=3, 7, 2, 6)-0.25 Degree CelsiusStandard Deviation 0.07
Atacicept 150 mg (Without Loading)Change From Baseline in Vital Signs: TemperatureWeek 24 (n=2, 4, 1, 6)-0.07 Degree CelsiusStandard Deviation 0.26
Atacicept 150 mg (Without Loading)Change From Baseline in Vital Signs: TemperatureWeek 8 (n=13, 11, 12, 16)-0.14 Degree CelsiusStandard Deviation 0.25
Atacicept 150 mg (Without Loading)Change From Baseline in Vital Signs: TemperatureWeek 20 (n=3, 7, 2, 6)-0.08 Degree CelsiusStandard Deviation 0.45
Atacicept 150 mg (Without Loading)Change From Baseline in Vital Signs: TemperatureWeek 16 (n=7, 9, 6, 12)0.01 Degree CelsiusStandard Deviation 0.42
Atacicept 150 mg (Without Loading)Change From Baseline in Vital Signs: TemperatureWeek 4 (n=15, 14, 12, 21)-0.12 Degree CelsiusStandard Deviation 0.31
Atacicept 150 mg (Without Loading)Change From Baseline in Vital Signs: TemperatureWeek 36 (n=0, 1, 0, 0)NA Degree Celsius
Atacicept 150 mg (Without Loading)Change From Baseline in Vital Signs: TemperatureWeek 2 (n=15, 13, 14, 21)-0.07 Degree CelsiusStandard Deviation 0.36
Atacicept 150 mg (Without Loading)Change From Baseline in Vital Signs: TemperatureWeek 12 (n=11, 12, 8, 16)-0.15 Degree CelsiusStandard Deviation 0.34
Primary

Number of Subjects With Positive Neutralizing Antibody (NAb)

Time frame: Baseline, Week 12 and 36

Population: Appropriate method/test was not established to identify the positive neutralizing antibodies for atacicept. Hence, this outcome measure was not assessed.

Primary

Number of Subjects With Treatment Emergent Adverse Events (TEAEs), Serious TEAEs, Injection Site Reactions, Infections, and Malignancies by Severity

TEAEs were defined as AEs with a start date after or on the date of the first DB treatment injection in ATAMS Extension and that occurred anytime after treatment discontinuation, or up to the day before first Rebif® rescue medication injection in ATAMS Extension. A serious TEAE was an AE that resulted in any of the following: death; life threatening; persistent/significant disability/incapacity; initial or prolonged inpatient hospitalization; congenital anomaly/birth defect. TEAE severity was graded as per Qualitative Toxicity Scale. Local injection site reactions (injection site: pain, redness, itching and swelling) throughout ATAMS Extension, starting after the first trial medication administration. If the subject experienced 1 or more of the above injection site symptoms, these were reported with the AE verbatim term injection site reaction. For all randomized subjects, there was an option of rescue treatment with Rebif® for 1 year beginning with the first injection of Rebif®).

Time frame: From the first dose of study drug administration up to Week 24

Population: Double-blind safety analysis set included all the subjects who received at least 1 dose of trial medication in the ATAMS extension study.

ArmMeasureGroupValue (NUMBER)
Atacicept 25 mg (With Loading)Number of Subjects With Treatment Emergent Adverse Events (TEAEs), Serious TEAEs, Injection Site Reactions, Infections, and Malignancies by SeverityMild malignancies0 Subjects
Atacicept 25 mg (With Loading)Number of Subjects With Treatment Emergent Adverse Events (TEAEs), Serious TEAEs, Injection Site Reactions, Infections, and Malignancies by SeveritySevere injection site reaction0 Subjects
Atacicept 25 mg (With Loading)Number of Subjects With Treatment Emergent Adverse Events (TEAEs), Serious TEAEs, Injection Site Reactions, Infections, and Malignancies by SeveritySevere TEAEs0 Subjects
Atacicept 25 mg (With Loading)Number of Subjects With Treatment Emergent Adverse Events (TEAEs), Serious TEAEs, Injection Site Reactions, Infections, and Malignancies by SeverityMild infections1 Subjects
Atacicept 25 mg (With Loading)Number of Subjects With Treatment Emergent Adverse Events (TEAEs), Serious TEAEs, Injection Site Reactions, Infections, and Malignancies by SeveritySevere infections0 Subjects
Atacicept 25 mg (With Loading)Number of Subjects With Treatment Emergent Adverse Events (TEAEs), Serious TEAEs, Injection Site Reactions, Infections, and Malignancies by SeverityModerate infections0 Subjects
Atacicept 25 mg (With Loading)Number of Subjects With Treatment Emergent Adverse Events (TEAEs), Serious TEAEs, Injection Site Reactions, Infections, and Malignancies by SeverityMild serious TEAEs0 Subjects
Atacicept 25 mg (With Loading)Number of Subjects With Treatment Emergent Adverse Events (TEAEs), Serious TEAEs, Injection Site Reactions, Infections, and Malignancies by SeverityMild TEAEs5 Subjects
Atacicept 25 mg (With Loading)Number of Subjects With Treatment Emergent Adverse Events (TEAEs), Serious TEAEs, Injection Site Reactions, Infections, and Malignancies by SeveritySevere malignancies0 Subjects
Atacicept 25 mg (With Loading)Number of Subjects With Treatment Emergent Adverse Events (TEAEs), Serious TEAEs, Injection Site Reactions, Infections, and Malignancies by SeverityModerate serious TEAEs0 Subjects
Atacicept 25 mg (With Loading)Number of Subjects With Treatment Emergent Adverse Events (TEAEs), Serious TEAEs, Injection Site Reactions, Infections, and Malignancies by SeverityModerate TEAEs2 Subjects
Atacicept 25 mg (With Loading)Number of Subjects With Treatment Emergent Adverse Events (TEAEs), Serious TEAEs, Injection Site Reactions, Infections, and Malignancies by SeveritySevere serious TEAEs0 Subjects
Atacicept 25 mg (With Loading)Number of Subjects With Treatment Emergent Adverse Events (TEAEs), Serious TEAEs, Injection Site Reactions, Infections, and Malignancies by SeverityModerate malignancies1 Subjects
Atacicept 25 mg (With Loading)Number of Subjects With Treatment Emergent Adverse Events (TEAEs), Serious TEAEs, Injection Site Reactions, Infections, and Malignancies by SeverityMild injection site reaction2 Subjects
Atacicept 25 mg (With Loading)Number of Subjects With Treatment Emergent Adverse Events (TEAEs), Serious TEAEs, Injection Site Reactions, Infections, and Malignancies by SeverityModerate injection site reaction0 Subjects
Atacicept 75 mg (With Loading)Number of Subjects With Treatment Emergent Adverse Events (TEAEs), Serious TEAEs, Injection Site Reactions, Infections, and Malignancies by SeverityModerate injection site reaction0 Subjects
Atacicept 75 mg (With Loading)Number of Subjects With Treatment Emergent Adverse Events (TEAEs), Serious TEAEs, Injection Site Reactions, Infections, and Malignancies by SeverityMild injection site reaction2 Subjects
Atacicept 75 mg (With Loading)Number of Subjects With Treatment Emergent Adverse Events (TEAEs), Serious TEAEs, Injection Site Reactions, Infections, and Malignancies by SeveritySevere injection site reaction0 Subjects
Atacicept 75 mg (With Loading)Number of Subjects With Treatment Emergent Adverse Events (TEAEs), Serious TEAEs, Injection Site Reactions, Infections, and Malignancies by SeverityMild TEAEs8 Subjects
Atacicept 75 mg (With Loading)Number of Subjects With Treatment Emergent Adverse Events (TEAEs), Serious TEAEs, Injection Site Reactions, Infections, and Malignancies by SeveritySevere infections0 Subjects
Atacicept 75 mg (With Loading)Number of Subjects With Treatment Emergent Adverse Events (TEAEs), Serious TEAEs, Injection Site Reactions, Infections, and Malignancies by SeverityModerate malignancies0 Subjects
Atacicept 75 mg (With Loading)Number of Subjects With Treatment Emergent Adverse Events (TEAEs), Serious TEAEs, Injection Site Reactions, Infections, and Malignancies by SeveritySevere TEAEs0 Subjects
Atacicept 75 mg (With Loading)Number of Subjects With Treatment Emergent Adverse Events (TEAEs), Serious TEAEs, Injection Site Reactions, Infections, and Malignancies by SeverityMild malignancies0 Subjects
Atacicept 75 mg (With Loading)Number of Subjects With Treatment Emergent Adverse Events (TEAEs), Serious TEAEs, Injection Site Reactions, Infections, and Malignancies by SeveritySevere serious TEAEs0 Subjects
Atacicept 75 mg (With Loading)Number of Subjects With Treatment Emergent Adverse Events (TEAEs), Serious TEAEs, Injection Site Reactions, Infections, and Malignancies by SeverityModerate infections1 Subjects
Atacicept 75 mg (With Loading)Number of Subjects With Treatment Emergent Adverse Events (TEAEs), Serious TEAEs, Injection Site Reactions, Infections, and Malignancies by SeverityMild infections2 Subjects
Atacicept 75 mg (With Loading)Number of Subjects With Treatment Emergent Adverse Events (TEAEs), Serious TEAEs, Injection Site Reactions, Infections, and Malignancies by SeveritySevere malignancies0 Subjects
Atacicept 75 mg (With Loading)Number of Subjects With Treatment Emergent Adverse Events (TEAEs), Serious TEAEs, Injection Site Reactions, Infections, and Malignancies by SeverityModerate TEAEs4 Subjects
Atacicept 75 mg (With Loading)Number of Subjects With Treatment Emergent Adverse Events (TEAEs), Serious TEAEs, Injection Site Reactions, Infections, and Malignancies by SeverityMild serious TEAEs0 Subjects
Atacicept 75 mg (With Loading)Number of Subjects With Treatment Emergent Adverse Events (TEAEs), Serious TEAEs, Injection Site Reactions, Infections, and Malignancies by SeverityModerate serious TEAEs1 Subjects
Atacicept 150 mg (With Loading)Number of Subjects With Treatment Emergent Adverse Events (TEAEs), Serious TEAEs, Injection Site Reactions, Infections, and Malignancies by SeverityMild serious TEAEs0 Subjects
Atacicept 150 mg (With Loading)Number of Subjects With Treatment Emergent Adverse Events (TEAEs), Serious TEAEs, Injection Site Reactions, Infections, and Malignancies by SeverityMild TEAEs8 Subjects
Atacicept 150 mg (With Loading)Number of Subjects With Treatment Emergent Adverse Events (TEAEs), Serious TEAEs, Injection Site Reactions, Infections, and Malignancies by SeverityModerate TEAEs6 Subjects
Atacicept 150 mg (With Loading)Number of Subjects With Treatment Emergent Adverse Events (TEAEs), Serious TEAEs, Injection Site Reactions, Infections, and Malignancies by SeveritySevere TEAEs0 Subjects
Atacicept 150 mg (With Loading)Number of Subjects With Treatment Emergent Adverse Events (TEAEs), Serious TEAEs, Injection Site Reactions, Infections, and Malignancies by SeverityModerate serious TEAEs0 Subjects
Atacicept 150 mg (With Loading)Number of Subjects With Treatment Emergent Adverse Events (TEAEs), Serious TEAEs, Injection Site Reactions, Infections, and Malignancies by SeveritySevere serious TEAEs0 Subjects
Atacicept 150 mg (With Loading)Number of Subjects With Treatment Emergent Adverse Events (TEAEs), Serious TEAEs, Injection Site Reactions, Infections, and Malignancies by SeverityMild injection site reaction5 Subjects
Atacicept 150 mg (With Loading)Number of Subjects With Treatment Emergent Adverse Events (TEAEs), Serious TEAEs, Injection Site Reactions, Infections, and Malignancies by SeverityModerate injection site reaction0 Subjects
Atacicept 150 mg (With Loading)Number of Subjects With Treatment Emergent Adverse Events (TEAEs), Serious TEAEs, Injection Site Reactions, Infections, and Malignancies by SeveritySevere injection site reaction0 Subjects
Atacicept 150 mg (With Loading)Number of Subjects With Treatment Emergent Adverse Events (TEAEs), Serious TEAEs, Injection Site Reactions, Infections, and Malignancies by SeverityMild infections4 Subjects
Atacicept 150 mg (With Loading)Number of Subjects With Treatment Emergent Adverse Events (TEAEs), Serious TEAEs, Injection Site Reactions, Infections, and Malignancies by SeverityModerate infections2 Subjects
Atacicept 150 mg (With Loading)Number of Subjects With Treatment Emergent Adverse Events (TEAEs), Serious TEAEs, Injection Site Reactions, Infections, and Malignancies by SeveritySevere infections0 Subjects
Atacicept 150 mg (With Loading)Number of Subjects With Treatment Emergent Adverse Events (TEAEs), Serious TEAEs, Injection Site Reactions, Infections, and Malignancies by SeverityMild malignancies0 Subjects
Atacicept 150 mg (With Loading)Number of Subjects With Treatment Emergent Adverse Events (TEAEs), Serious TEAEs, Injection Site Reactions, Infections, and Malignancies by SeverityModerate malignancies0 Subjects
Atacicept 150 mg (With Loading)Number of Subjects With Treatment Emergent Adverse Events (TEAEs), Serious TEAEs, Injection Site Reactions, Infections, and Malignancies by SeveritySevere malignancies0 Subjects
Atacicept 150 mg (Without Loading)Number of Subjects With Treatment Emergent Adverse Events (TEAEs), Serious TEAEs, Injection Site Reactions, Infections, and Malignancies by SeveritySevere infections0 Subjects
Atacicept 150 mg (Without Loading)Number of Subjects With Treatment Emergent Adverse Events (TEAEs), Serious TEAEs, Injection Site Reactions, Infections, and Malignancies by SeverityModerate injection site reaction2 Subjects
Atacicept 150 mg (Without Loading)Number of Subjects With Treatment Emergent Adverse Events (TEAEs), Serious TEAEs, Injection Site Reactions, Infections, and Malignancies by SeverityMild injection site reaction5 Subjects
Atacicept 150 mg (Without Loading)Number of Subjects With Treatment Emergent Adverse Events (TEAEs), Serious TEAEs, Injection Site Reactions, Infections, and Malignancies by SeveritySevere malignancies0 Subjects
Atacicept 150 mg (Without Loading)Number of Subjects With Treatment Emergent Adverse Events (TEAEs), Serious TEAEs, Injection Site Reactions, Infections, and Malignancies by SeverityMild malignancies0 Subjects
Atacicept 150 mg (Without Loading)Number of Subjects With Treatment Emergent Adverse Events (TEAEs), Serious TEAEs, Injection Site Reactions, Infections, and Malignancies by SeveritySevere serious TEAEs0 Subjects
Atacicept 150 mg (Without Loading)Number of Subjects With Treatment Emergent Adverse Events (TEAEs), Serious TEAEs, Injection Site Reactions, Infections, and Malignancies by SeverityModerate serious TEAEs0 Subjects
Atacicept 150 mg (Without Loading)Number of Subjects With Treatment Emergent Adverse Events (TEAEs), Serious TEAEs, Injection Site Reactions, Infections, and Malignancies by SeverityModerate TEAEs4 Subjects
Atacicept 150 mg (Without Loading)Number of Subjects With Treatment Emergent Adverse Events (TEAEs), Serious TEAEs, Injection Site Reactions, Infections, and Malignancies by SeverityModerate malignancies0 Subjects
Atacicept 150 mg (Without Loading)Number of Subjects With Treatment Emergent Adverse Events (TEAEs), Serious TEAEs, Injection Site Reactions, Infections, and Malignancies by SeverityMild serious TEAEs0 Subjects
Atacicept 150 mg (Without Loading)Number of Subjects With Treatment Emergent Adverse Events (TEAEs), Serious TEAEs, Injection Site Reactions, Infections, and Malignancies by SeveritySevere TEAEs1 Subjects
Atacicept 150 mg (Without Loading)Number of Subjects With Treatment Emergent Adverse Events (TEAEs), Serious TEAEs, Injection Site Reactions, Infections, and Malignancies by SeverityModerate infections0 Subjects
Atacicept 150 mg (Without Loading)Number of Subjects With Treatment Emergent Adverse Events (TEAEs), Serious TEAEs, Injection Site Reactions, Infections, and Malignancies by SeverityMild infections6 Subjects
Atacicept 150 mg (Without Loading)Number of Subjects With Treatment Emergent Adverse Events (TEAEs), Serious TEAEs, Injection Site Reactions, Infections, and Malignancies by SeveritySevere injection site reaction0 Subjects
Atacicept 150 mg (Without Loading)Number of Subjects With Treatment Emergent Adverse Events (TEAEs), Serious TEAEs, Injection Site Reactions, Infections, and Malignancies by SeverityMild TEAEs13 Subjects
Primary

Number of Subjects With Worsened Post Baseline Shift in Immunoglobulin A (IgA), IgG and IgM Levels

Number of subjects with shifts from normal Grade (Grade 0) at Baseline to worse value at post-baseline (Grade 1 to Grade 4) according to the following criteria: IgA Grade 0: greater than or equal to (\>=) lower limit normal (LLN) 0.7 gram per liter (g/L); Grade 1: less than (\<) LLN - 0.5 g/L, Grade 2: \<0.5g/L -0.3 g/L, Grade 3: \<0.3 g/L -0.1 g/L, Grade 4: \< 0.1 g/L; IgG Grade 0: \>= LLN (7 g/L), Grade 1: \< LLN - 5 g/L, Grade 2: \<5g/L -4 g/L, Grade 3: \<4 g/L -3 g/L and Grade 4: \< 3 g/L; IgM Grade 0: \>= LLN (0.4 g/L), Grade 1: \< LLN - 0.3 g/L, Grade 2: \<0.3 g/L -0.2 g/L, Grade 3: \<0.2 g/L -0.1 g/L, and Grade 4: \< 0.1 g/L are presented in this outcome measure.

Time frame: Baseline up to Week 36

Population: Intent-to-treat (ITT) population included all randomized subjects.

ArmMeasureGroupValue (NUMBER)
Atacicept 25 mg (With Loading)Number of Subjects With Worsened Post Baseline Shift in Immunoglobulin A (IgA), IgG and IgM LevelsIgA1 Subjects
Atacicept 25 mg (With Loading)Number of Subjects With Worsened Post Baseline Shift in Immunoglobulin A (IgA), IgG and IgM LevelsIgM7 Subjects
Atacicept 25 mg (With Loading)Number of Subjects With Worsened Post Baseline Shift in Immunoglobulin A (IgA), IgG and IgM LevelsIgG4 Subjects
Atacicept 75 mg (With Loading)Number of Subjects With Worsened Post Baseline Shift in Immunoglobulin A (IgA), IgG and IgM LevelsIgA3 Subjects
Atacicept 75 mg (With Loading)Number of Subjects With Worsened Post Baseline Shift in Immunoglobulin A (IgA), IgG and IgM LevelsIgM6 Subjects
Atacicept 75 mg (With Loading)Number of Subjects With Worsened Post Baseline Shift in Immunoglobulin A (IgA), IgG and IgM LevelsIgG8 Subjects
Atacicept 150 mg (With Loading)Number of Subjects With Worsened Post Baseline Shift in Immunoglobulin A (IgA), IgG and IgM LevelsIgG12 Subjects
Atacicept 150 mg (With Loading)Number of Subjects With Worsened Post Baseline Shift in Immunoglobulin A (IgA), IgG and IgM LevelsIgA10 Subjects
Atacicept 150 mg (With Loading)Number of Subjects With Worsened Post Baseline Shift in Immunoglobulin A (IgA), IgG and IgM LevelsIgM14 Subjects
Atacicept 150 mg (Without Loading)Number of Subjects With Worsened Post Baseline Shift in Immunoglobulin A (IgA), IgG and IgM LevelsIgA9 Subjects
Atacicept 150 mg (Without Loading)Number of Subjects With Worsened Post Baseline Shift in Immunoglobulin A (IgA), IgG and IgM LevelsIgM7 Subjects
Atacicept 150 mg (Without Loading)Number of Subjects With Worsened Post Baseline Shift in Immunoglobulin A (IgA), IgG and IgM LevelsIgG5 Subjects
Secondary

Change From Baseline in Expanded Disability Status Scale (EDSS) Scores at Week 12

EDSS is an ordinal scale in half-point increments that qualifies disability in participants with multiple sclerosis (MS). It assesses the 8 functional systems (visual, brainstem, pyramidal, cerebellar, sensory, bowel/bladder, cerebral and other) as well as ambulation. EDSS overall score ranging from 0 (normal) to 10 (death due to MS) was calculated.

Time frame: Baseline, Week 12

Population: Intent-to-treat (ITT) population included all randomized subjects. N signifies (total number of subjects analyzed) the number of evaluable subjects for this outcome measure.

ArmMeasureValue (MEAN)Dispersion
Atacicept 25 mg (With Loading)Change From Baseline in Expanded Disability Status Scale (EDSS) Scores at Week 120.09 Units on a scaleStandard Deviation 0.58
Atacicept 75 mg (With Loading)Change From Baseline in Expanded Disability Status Scale (EDSS) Scores at Week 120.04 Units on a scaleStandard Deviation 0.97
Atacicept 150 mg (With Loading)Change From Baseline in Expanded Disability Status Scale (EDSS) Scores at Week 120.50 Units on a scaleStandard Deviation 0.85
Atacicept 150 mg (Without Loading)Change From Baseline in Expanded Disability Status Scale (EDSS) Scores at Week 12-0.06 Units on a scaleStandard Deviation 0.75
Secondary

Change in Multiple Sclerosis Functional Composite (MSFC) Score at Week 12

The MSFC is a multidimensional clinical outcome measure which consists of three sub-tests; Timed 25-Foot Walk, 9-Hole Peg Test and Paced Auditory Serial Addition Test-3(PASAT-3). The Timed 25-Foot Walk is a quantitative measure of lower extremity function. The 9-Hole Peg Test is a quantitative measure of upper extremity (arm and hand) function. The PASAT is a measure of cognitive function that specifically assesses auditory information processing speed and flexibility, as well as calculation ability. Standardized results (Z-scores) of these sub-tests and the overall MSFC Z-score as an average of these three Z-scores was calculated. Higher Z-scores reflect better neurological function and a positive change from baseline indicates improvement. An increase in score indicates an improvement (range -3 to +3).

Time frame: Week 12

Population: Intent-to-treat (ITT) population included all randomized subjects. N signifies number of evaluable subjects for this outcome measure.

ArmMeasureValue (MEAN)Dispersion
Atacicept 25 mg (With Loading)Change in Multiple Sclerosis Functional Composite (MSFC) Score at Week 120.21 z-scoreStandard Deviation 0.4
Atacicept 75 mg (With Loading)Change in Multiple Sclerosis Functional Composite (MSFC) Score at Week 120.04 z-scoreStandard Deviation 0.47
Atacicept 150 mg (With Loading)Change in Multiple Sclerosis Functional Composite (MSFC) Score at Week 12-0.01 z-scoreStandard Deviation 0.24
Atacicept 150 mg (Without Loading)Change in Multiple Sclerosis Functional Composite (MSFC) Score at Week 120.07 z-scoreStandard Deviation 0.34
Secondary

Concentrations of Free and Total Atacicept

Time frame: Baseline and Week 12

Population: This outcome measure was not assessed due to lack of a valid assay during the usable time period of the samples.

Secondary

Free B-Lymphocyte Stimulator (BLyS) and Free A Proliferation-Inducing Ligand (APRIL) Serum Concentrations.

Levels of free APRIL and free BLyS: Free APRIL serum samples were to be analyzed by using a validated enzyme-linked immunosorbent assay (ELISA) with limits of detection of 0.3125 nanogram per milliliter (ng/mL) for free APRIL and free BlyS serum samples were analysed using a validated ELISA with limits of detection of 1.56 ng/mL.

Time frame: Baseline, Week 12 and 36

Population: This outcome measure was not assessed due to lack of a valid assay for measuring BLyS and APRIL.

Secondary

Magnetic Resonance Imaging (MRI) Parameters: Number of T1 Gadolinium (Gd)-Enhancing Lesions Per Subject

Time frame: Baseline, Week 12 and 24

Population: Intent-to-treat (ITT) population included all randomized subjects. n signifies the number of evaluable subjects for this outcome measure.

ArmMeasureGroupValue (MEAN)Dispersion
Atacicept 25 mg (With Loading)Magnetic Resonance Imaging (MRI) Parameters: Number of T1 Gadolinium (Gd)-Enhancing Lesions Per SubjectBaseline (n=16, 19, 17, 22)1.1 Number of lesions per subjectStandard Deviation 2.2
Atacicept 25 mg (With Loading)Magnetic Resonance Imaging (MRI) Parameters: Number of T1 Gadolinium (Gd)-Enhancing Lesions Per SubjectWeek 24 (n=2, 3, 1, 6)0.00 Number of lesions per subjectStandard Deviation 0
Atacicept 25 mg (With Loading)Magnetic Resonance Imaging (MRI) Parameters: Number of T1 Gadolinium (Gd)-Enhancing Lesions Per SubjectWeek 12 (n=11, 11, 7, 15)0.27 Number of lesions per subjectStandard Deviation 0.47
Atacicept 75 mg (With Loading)Magnetic Resonance Imaging (MRI) Parameters: Number of T1 Gadolinium (Gd)-Enhancing Lesions Per SubjectBaseline (n=16, 19, 17, 22)2.3 Number of lesions per subjectStandard Deviation 5
Atacicept 75 mg (With Loading)Magnetic Resonance Imaging (MRI) Parameters: Number of T1 Gadolinium (Gd)-Enhancing Lesions Per SubjectWeek 24 (n=2, 3, 1, 6)2.00 Number of lesions per subjectStandard Deviation 2
Atacicept 75 mg (With Loading)Magnetic Resonance Imaging (MRI) Parameters: Number of T1 Gadolinium (Gd)-Enhancing Lesions Per SubjectWeek 12 (n=11, 11, 7, 15)0.64 Number of lesions per subjectStandard Deviation 1.29
Atacicept 150 mg (With Loading)Magnetic Resonance Imaging (MRI) Parameters: Number of T1 Gadolinium (Gd)-Enhancing Lesions Per SubjectWeek 12 (n=11, 11, 7, 15)1.00 Number of lesions per subjectStandard Deviation 1.15
Atacicept 150 mg (With Loading)Magnetic Resonance Imaging (MRI) Parameters: Number of T1 Gadolinium (Gd)-Enhancing Lesions Per SubjectBaseline (n=16, 19, 17, 22)0.8 Number of lesions per subjectStandard Deviation 1.4
Atacicept 150 mg (With Loading)Magnetic Resonance Imaging (MRI) Parameters: Number of T1 Gadolinium (Gd)-Enhancing Lesions Per SubjectWeek 24 (n=2, 3, 1, 6)0.00 Number of lesions per subjectStandard Deviation 0
Atacicept 150 mg (Without Loading)Magnetic Resonance Imaging (MRI) Parameters: Number of T1 Gadolinium (Gd)-Enhancing Lesions Per SubjectBaseline (n=16, 19, 17, 22)0.9 Number of lesions per subjectStandard Deviation 1.4
Atacicept 150 mg (Without Loading)Magnetic Resonance Imaging (MRI) Parameters: Number of T1 Gadolinium (Gd)-Enhancing Lesions Per SubjectWeek 24 (n=2, 3, 1, 6)0.83 Number of lesions per subjectStandard Deviation 0.75
Atacicept 150 mg (Without Loading)Magnetic Resonance Imaging (MRI) Parameters: Number of T1 Gadolinium (Gd)-Enhancing Lesions Per SubjectWeek 12 (n=11, 11, 7, 15)2.27 Number of lesions per subjectStandard Deviation 7.16
Secondary

Magnetic Resonance Imaging (MRI) Parameters: Volume of T2 Lesions (New or Enlarging T2 Lesions) Per Subject

Time frame: Baseline, Week 12 and Week 24

ArmMeasureGroupValue (MEAN)Dispersion
Atacicept 25 mg (With Loading)Magnetic Resonance Imaging (MRI) Parameters: Volume of T2 Lesions (New or Enlarging T2 Lesions) Per SubjectBaseline (n=16, 19, 17, 22)4792.76 Cubic millimeterStandard Deviation 3152.56
Atacicept 25 mg (With Loading)Magnetic Resonance Imaging (MRI) Parameters: Volume of T2 Lesions (New or Enlarging T2 Lesions) Per SubjectWeek 24 (n=2, 3, 1, 6)1699.60 Cubic millimeterStandard Deviation 586.76
Atacicept 25 mg (With Loading)Magnetic Resonance Imaging (MRI) Parameters: Volume of T2 Lesions (New or Enlarging T2 Lesions) Per SubjectWeek 12 (n=11, 11, 7, 15)5604.42 Cubic millimeterStandard Deviation 5154.52
Atacicept 75 mg (With Loading)Magnetic Resonance Imaging (MRI) Parameters: Volume of T2 Lesions (New or Enlarging T2 Lesions) Per SubjectBaseline (n=16, 19, 17, 22)8196.59 Cubic millimeterStandard Deviation 8888.74
Atacicept 75 mg (With Loading)Magnetic Resonance Imaging (MRI) Parameters: Volume of T2 Lesions (New or Enlarging T2 Lesions) Per SubjectWeek 24 (n=2, 3, 1, 6)6814.60 Cubic millimeterStandard Deviation 6643
Atacicept 75 mg (With Loading)Magnetic Resonance Imaging (MRI) Parameters: Volume of T2 Lesions (New or Enlarging T2 Lesions) Per SubjectWeek 12 (n=11, 11, 7, 15)7634.89 Cubic millimeterStandard Deviation 6340.19
Atacicept 150 mg (With Loading)Magnetic Resonance Imaging (MRI) Parameters: Volume of T2 Lesions (New or Enlarging T2 Lesions) Per SubjectWeek 12 (n=11, 11, 7, 15)4934.03 Cubic millimeterStandard Deviation 4802.98
Atacicept 150 mg (With Loading)Magnetic Resonance Imaging (MRI) Parameters: Volume of T2 Lesions (New or Enlarging T2 Lesions) Per SubjectBaseline (n=16, 19, 17, 22)6158.04 Cubic millimeterStandard Deviation 7945.59
Atacicept 150 mg (With Loading)Magnetic Resonance Imaging (MRI) Parameters: Volume of T2 Lesions (New or Enlarging T2 Lesions) Per SubjectWeek 24 (n=2, 3, 1, 6)1931.40 Cubic millimeterStandard Deviation 0
Atacicept 150 mg (Without Loading)Magnetic Resonance Imaging (MRI) Parameters: Volume of T2 Lesions (New or Enlarging T2 Lesions) Per SubjectBaseline (n=16, 19, 17, 22)5868.84 Cubic millimeterStandard Deviation 7170.81
Atacicept 150 mg (Without Loading)Magnetic Resonance Imaging (MRI) Parameters: Volume of T2 Lesions (New or Enlarging T2 Lesions) Per SubjectWeek 24 (n=2, 3, 1, 6)5541.80 Cubic millimeterStandard Deviation 5614.73
Atacicept 150 mg (Without Loading)Magnetic Resonance Imaging (MRI) Parameters: Volume of T2 Lesions (New or Enlarging T2 Lesions) Per SubjectWeek 12 (n=11, 11, 7, 15)5365.63 Cubic millimeterStandard Deviation 7445.87
Secondary

Number of Subjects With Clinical Attacks/Relapses

A clinical attack/relapse was defined as the fulfillment of all the following criteria: 1. Neurological abnormality, either newly appearing or re-appearing, with abnormality specified by both i) neurological abnormality separated by at least 30 days from onset of a preceding clinical event, and ii) neurological abnormality lasting for at least 24 hours. 2. Absence of fever or known infection (fever with temperature (axillary, orally, or intra-auriculary) \> 37.5°C/99.5 °Fahrenheit). 3. Objective neurological impairment, correlating with the subject's reported symptoms, defined as either i) increase in at least 1 of the functional systems of the Expanded Disability Status Scale (EDSS), or ii) increase of the total EDSS score. EDSS overall score ranging from 0 (normal) to 10 (death due to MS) was calculated.

Time frame: Baseline up to Week 24

Population: Intent-to-treat (ITT) population included all randomized subjects.

ArmMeasureGroupValue (NUMBER)
Atacicept 25 mg (With Loading)Number of Subjects With Clinical Attacks/Relapses1 Relapse0 Subjects
Atacicept 25 mg (With Loading)Number of Subjects With Clinical Attacks/Relapses3 Relapse0 Subjects
Atacicept 25 mg (With Loading)Number of Subjects With Clinical Attacks/RelapsesGreater than or equal to (>=) 4 Relapse0 Subjects
Atacicept 25 mg (With Loading)Number of Subjects With Clinical Attacks/Relapses2 Relapse0 Subjects
Atacicept 25 mg (With Loading)Number of Subjects With Clinical Attacks/RelapsesNo Relapse16 Subjects
Atacicept 75 mg (With Loading)Number of Subjects With Clinical Attacks/RelapsesNo Relapse16 Subjects
Atacicept 75 mg (With Loading)Number of Subjects With Clinical Attacks/RelapsesGreater than or equal to (>=) 4 Relapse0 Subjects
Atacicept 75 mg (With Loading)Number of Subjects With Clinical Attacks/Relapses1 Relapse3 Subjects
Atacicept 75 mg (With Loading)Number of Subjects With Clinical Attacks/Relapses2 Relapse0 Subjects
Atacicept 75 mg (With Loading)Number of Subjects With Clinical Attacks/Relapses3 Relapse0 Subjects
Atacicept 150 mg (With Loading)Number of Subjects With Clinical Attacks/Relapses2 Relapse0 Subjects
Atacicept 150 mg (With Loading)Number of Subjects With Clinical Attacks/RelapsesGreater than or equal to (>=) 4 Relapse0 Subjects
Atacicept 150 mg (With Loading)Number of Subjects With Clinical Attacks/RelapsesNo Relapse15 Subjects
Atacicept 150 mg (With Loading)Number of Subjects With Clinical Attacks/Relapses3 Relapse0 Subjects
Atacicept 150 mg (With Loading)Number of Subjects With Clinical Attacks/Relapses1 Relapse2 Subjects
Atacicept 150 mg (Without Loading)Number of Subjects With Clinical Attacks/RelapsesGreater than or equal to (>=) 4 Relapse0 Subjects
Atacicept 150 mg (Without Loading)Number of Subjects With Clinical Attacks/Relapses2 Relapse0 Subjects
Atacicept 150 mg (Without Loading)Number of Subjects With Clinical Attacks/RelapsesNo Relapse21 Subjects
Atacicept 150 mg (Without Loading)Number of Subjects With Clinical Attacks/Relapses1 Relapse1 Subjects
Atacicept 150 mg (Without Loading)Number of Subjects With Clinical Attacks/Relapses3 Relapse0 Subjects
Secondary

Pharmacogenetics/Pharmacogenomics Analysis

Gene expression profiling and gene polymorphism identification were to be used to identify putative markers for response to treatment. * Genome-wide gene polymorphism characterization by genome-wide scan. * Targeted gene polymorphism identification of B-Lymphocyte Stimulator (BLyS) , APRIL, (receptor for B cell activating factor of the tumor necrosis factor \[TNF\] family) BAFF-R, (Transmembrane Activator) TACI and (B Cell Maturation Antigen) BCMA and HLA-DRB1 by direct genotyping or sequencing .

Time frame: Day 1 and Week 36

Population: Genetic/genomic analysis was not performed as the trial was terminated early.

Source: ClinicalTrials.gov · Data processed: Mar 21, 2026