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An Open-label, Nonrandomized Study to Evaluate the Safety and Immunogenicity of Raxibacumab With Reinjection

An Open-Label Study to Evaluate the Immunogenicity and Safety of Raxibacumab (Human Monoclonal Antibody to B. Anthracis Protective Antigen) Administered in Healthy Subjects

Status
Completed
Phases
Phase 2Phase 3
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT02016963
Enrollment
20
Registered
2013-12-20
Start date
2008-01-31
Completion date
2008-05-31
Last updated
2018-11-29

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

Conditions

Therapeutic Treatment of Inhalation Anthrax

Keywords

Monoclonal Antibody, Safety, Raxibacumab, HGS1021, Immunogenicity

Brief summary

This is an open-label study to evaluate the immunogenicity and safety of raxibacumab in healthy adult male and female subjects. Subjects who have received raxibacumab \>= 4 months ago will be enrolled and dosed as follows: A maximum of 25 subjects (to include 3 evaluable female subjects) will receive a second dose of raxibacumab equal to that of the previous dose \>= 4 months following the first dose. Subjects will remain in house from Day 0 until Day 1 and will be followed for 70 days after receiving the second dose of raxibacumab. Raxibacumab has been shown to provide improved survival in rabbit and monkey anthrax spore challenge studies. Preliminary data from our rabbit pivotal efficacy study showed significant survival benefit for raxibacumab over placebo. Exposure to anthrax and resulting clinical disease can occur more than once, especially in individuals who do not develop protective immunity. Hence, if clinically indicated for the treatment of anthrax, there may be a requirement for the repeat administration of raxibacumab. The rationale of the study is to evaluate the immunogenicity and safety of repeat administration of raxibacumab with a \>= 4 month interval between dosing.

Interventions

BIOLOGICALRaxibacumab

Raxibacumab will be supplied in 50 milliliter (mL) sterile, single-use vials containing 34.9 mL of liquid formulation per vial. Each vial contains 50 milligram (mg)/mL raxibacumab in 0.13 mg/mL citric acid, 2.8 mg/mL sodium citrate, 10 mg/mL sucrose, 18 mg/mL glycine, 0.2 mg/mL polysorbate 80, pH 6.5

Sponsors

GlaxoSmithKline
CollaboratorINDUSTRY
Emergent BioSolutions
CollaboratorINDUSTRY
Human Genome Sciences Inc.
Lead SponsorINDUSTRY

Study design

Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
TREATMENT
Masking
NONE

Eligibility

Sex/Gender
ALL
Age
18 Years to 64 Years
Healthy volunteers
Yes

Inclusion criteria

* Enrolled and treated with raxibacumab in another HGS protocol, \>= 4 months ago. * Male or female \>= 18 and \<= 64 years of age. * Laboratory values that are Grade 0 by the modified Division of Microbiology and Infectious Diseases (DMID) toxicity tables. Subjects with laboratory values that are Grade 1 and are not considered clinically significant by the Principal Investigator may be enrolled following consultation with the Medical Monitor. * A female subject is eligible to enter the study if she is: Not pregnant or nursing, Post menopausal, has had a hysterectomy, or documentation of sterility, Of child bearing potential (ie, woman with an intact uterus and ovaries and no documentation of oviductal or uterine dysfunction that would cause sterility). * These women must have a negative blood pregnancy test at screening and on Day -1 prior to dosing and agree to 1 of the following: a)Complete abstinence from intercourse from the date of screening through the duration of follow-up, b)Consistent and correct use of 1 of the following medically accepted methods of birth control, in addition to a male partner who correctly uses a condom or is sterile prior to the female subject's entry into the study and is the sole sexual partner for the female subject from the date of screening through the duration of follow-up, implants of levonorgestrel; injectable progesterone; any intrauterine device (IUD) with a documented failure rate of less than 1% per year; oral contraceptives (either combined or progesterone only); double barrier method: condom, cervical cap or diaphragm with spermicidal agent; transdermal contraceptive patch. * All males who are not sterile must agree to either abstain from intercourse or consistently and correctly use a condom while their female partner agrees to use 1 of the appropriate medically accepted methods of birth control listed above from the date of screening through the duration of follow-up. * Have the ability to understand the requirements of the study, provide written informed consent (including consent for the use and disclosure of research-related health information), comply with the study protocol procedures, and agree to return for the required study visits.

Exclusion criteria

* History or clinical evidence of significant, acute, or chronic diseases (ie, cardiovascular, pulmonary, gastrointestinal, hepatic, renal, neurological, or infectious diseases), which could confound the results of the study or put the subject at undue risk. * Prior immunization with anthrax vaccine adsorbed (AVA), prior treatment with investigational anthrax therapies (other than raxibacumab \>= 4 months ago), prior treatment for anthrax exposure, or a confirmed anthrax infection. * History of Type I hypersensitivity reaction to food or drugs, intravenous (IV) contrast dye, or history of urticaria. * Previous hypersensitivity to raxibacumab. * Previous serious or Grade 3 or greater raxibacumab related adverse event (AE). * Drug or alcohol addiction within the last 12 months. Subjects who have documented addiction free period of at least 12 months and in the clinical judgement of the investigator are not at risk for relapse may be enrolled in the study. * Evidence of active or suspected malignancy or history of malignancy within the last 5 years (with the exception of adequately treated basal cell carcinoma of the skin or in situ carcinoma of the cervix). * Participation in any other clinical trials of an investigational compound within 60 days of initiating study agent or refusal to refrain from participation during this study.

Design outcomes

Primary

MeasureTime frameDescription
Number of Participants Who Developed a Positive Anti-raxibacumab Antibody ResponseFrom the date of the dose administration of study agent for this study (Day 0) until Day 70Number of participants who developed an positive anti-raxibacumab antibody response during the study were assessed.The antibody response to raxibacumab was assessed using a screening assay (i.e. by electrochemiluminescence counts). Positive samples would be further tested in an inhibition of binding assay to confirm the specificity of binding.

Secondary

MeasureTime frameDescription
Number of Participants With Hematological Toxicities of the Indicated GradeFrom the date of the dose administration of study agent for this study (Day 0) until Day 70Clinical hematological parameters were assessed using the modified Division of Microbiology and Infectious Diseases (DMID) toxicity tables, version 2.0. Grade 1 (Mild): Transient or mild discomfort (\< 48 hours); no medical intervention or therapy required. Grade 2 (Moderate): Mild to moderate limitation in activity, some assistance may be needed; no or minimal medical intervention or therapy required. Grade 3 (Severe): Marked limitation in activity, some assistance usually required; medical intervention or therapy required, hospitalizations possible. Grade 4 (Life-threatening): Extreme limitation in activity, significant assistance required; significant medical intervention or therapy required, hospitalization or hospice care probable.
Number of Participants With at Least a 2-grade Worsening From Baseline in Hematological ToxicitiesFrom the date of the dose administration of study agent for this study (Day 0) until Day 70The number of participants with at least a 2-grade worsening from Baseline in hematological toxicities is presented. Clinical hematological parameters were assessed using the modified Division of Microbiology and Infectious Diseases (DMID) toxicity tables, version 2.0. Grade 1 (Mild): Transient or mild discomfort (\< 48 hours); no medical intervention or therapy required. Grade 2 (Moderate): Mild to moderate limitation in activity, some assistance may be needed; no or minimal medical intervention or therapy required. Grade 3 (Severe): Marked limitation in activity, some assistance usually required; medical intervention or therapy required, hospitalizations possible. Grade 4 (Life-threatening): Extreme limitation in activity, significant assistance required; significant medical intervention or therapy required, hospitalization or hospice care probable. Baseline is defined as the value of the variable measured at Day 0 prior to dosing.
Number of Participants With Liver Toxicities of the Indicated GradeFrom the date of the dose administration of study agent for this study (Day 0) until Day 70Liver function parameters were assessed using the modified Division of Microbiology and Infectious Diseases (DMID) toxicity tables, version 2.0. Grade 1 (Mild): Transient or mild discomfort (\< 48 hours); no medical intervention or therapy required. Grade 2 (Moderate): Mild to moderate limitation in activity, some assistance may be needed; no or minimal medical intervention or therapy required. Grade 3 (Severe): Marked limitation in activity, some assistance usually required; medical intervention or therapy required, hospitalizations possible. Grade 4 (Life-threatening): Extreme limitation in activity, significant assistance required; significant medical intervention or therapy required, hospitalization or hospice care probable.
Number of Participants With at Least a 2-grade Worsening From Baseline in Liver ToxicitiesFrom the date of the dose administration of study agent for this study (Day 0) until Day 70The number of participants with at least a 2-grade worsening from Baseline in liver toxicities is presented. Liver function parameters were assessed using the modified Division of Microbiology and Infectious Diseases (DMID) toxicity tables, version 2.0. Grade 1 (Mild): Transient or mild discomfort (\< 48 hours); no medical intervention or therapy required. Grade 2 (Moderate): Mild to moderate limitation in activity, some assistance may be needed; no or minimal medical intervention or therapy required. Grade 3 (Severe): Marked limitation in activity, some assistance usually required; medical intervention or therapy required, hospitalizations possible. Grade 4 (Life-threatening): Extreme limitation in activity, significant assistance required; significant medical intervention or therapy required, hospitalization or hospice care probable. Baseline is defined as the value of the variable measured at Day 0 prior to dosing.
Number of Participants With Electrolyte Toxicities of the Indicated GradeFrom the date of the dose administration of study agent for this study (Day 0) until Day 70Electrolyte function parameters were assessed using the modified Division of Microbiology and Infectious Diseases (DMID) toxicity tables, version 2.0. Grade 1 (Mild): Transient or mild discomfort (\< 48 hours); no medical intervention or therapy required. Grade 2 (Moderate): Mild to moderate limitation in activity, some assistance may be needed; no or minimal medical intervention or therapy required. Grade 3 (Severe): Marked limitation in activity, some assistance usually required; medical intervention or therapy required, hospitalizations possible. Grade 4 (Life-threatening): Extreme limitation in activity, significant assistance required; significant medical intervention or therapy required, hospitalization or hospice care probable.
Number of Participants With Any Adverse Event (AE) or Any Serious Adverse Event (SAE) During the Treatment PeriodFrom the date of the dose administration of study agent for this study (Day 0) until Day 70An AE is defined as any untoward medical occurrence in a participant or clinical investigation participant, temporally associated with the use of a medicinal product, whether or not considered related to the medicinal product. This includes worsening (eg, increase in frequency or severity) of pre-existing conditions. A serious adverse event (SAE) is defined as any untoward medical occurrence that, at any dose, results in death, is life threatening, requires hospitalization or prolongation of existing hospitalization, results in disability/incapacity, or is a congenital anomaly/birth defect. Medical or scientific judgment should be exercised in deciding whether reporting is appropriate in other situations. Refer to the General Adverse AE/SAE module for a complete list of AEs and SAEs.
Number of Participants With Other Chemistry Toxicities of the Indicated GradeFrom the date of the dose administration of study agent for this study (Day 0) until Day 70Other chemistry parameters were assessed using the modified Division of Microbiology and Infectious Diseases (DMID) toxicity tables, version 2.0. Grade 1 (Mild): Transient or mild discomfort (\< 48 hours); no medical intervention or therapy required. Grade 2 (Moderate): Mild to moderate limitation in activity, some assistance may be needed; no or minimal medical intervention or therapy required. Grade 3 (Severe): Marked limitation in activity, some assistance usually required; medical intervention or therapy required, hospitalizations possible. Grade 4 (Life-threatening): Extreme limitation in activity, significant assistance required; significant medical intervention or therapy required, hospitalization or hospice care probable.
Number of Participants With at Least a 2-grade Worsening From Baseline in Other Chemistry ToxicitiesFrom the date of the dose administration of study agent for this study (Day 0) until Day 70The number of participants with at least a 2-grade worsening from Baseline in other chemistry toxicities is presented. Other clinical chemistry parameters were assessed using the modified Division of Microbiology and Infectious Diseases (DMID) toxicity tables, version 2.0. Grade 1 (Mild): Transient or mild discomfort (\< 48 hours); no medical intervention or therapy required. Grade 2 (Moderate): Mild to moderate limitation in activity, some assistance may be needed; no or minimal medical intervention or therapy required. Grade 3 (Severe): Marked limitation in activity, some assistance usually required; medical intervention or therapy required, hospitalizations possible. Grade 4 (Life-threatening): Extreme limitation in activity, significant assistance required; significant medical intervention or therapy required, hospitalization or hospice care probable.Baseline is defined as the value of the variable measured at Day 0 prior to dosing.
Number of Participants With Urinalysis Toxicities of the Indicated GradeFrom the date of the dose administration of study agent for this study (Day 0) until Day 70Urinaysis parameters were assessed using the modified Division of Microbiology and Infectious Diseases (DMID) toxicity tables, version 2.0. Grade 1 (Mild): Transient or mild discomfort (\< 48 hours); no medical intervention or therapy required. Grade 2 (Moderate): Mild to moderate limitation in activity, some assistance may be needed; no or minimal medical intervention or therapy required. Grade 3 (Severe): Marked limitation in activity, some assistance usually required; medical intervention or therapy required, hospitalizations possible. Grade 4 (Life-threatening): Extreme limitation in activity, significant assistance required; significant medical intervention or therapy required, hospitalization or hospice care probable.
Number of Participants With at Least a 2-grade Worsening From Baseline in Urinalysis ToxicitiesFrom the date of the dose administration of study agent for this study (Day 0) until Day 70Urinalysis parameters were assessed using the modified Division of Microbiology and Infectious Diseases (DMID) toxicity tables, version 2.0. Grade 1 (Mild): Transient or mild discomfort (\< 48 hours); no medical intervention or therapy required. Grade 2 (Moderate): Mild to moderate limitation in activity, some assistance may be needed; no or minimal medical intervention or therapy required. Grade 3 (Severe): Marked limitation in activity, some assistance usually required; medical intervention or therapy required, hospitalizations possible. Grade 4 (Life-threatening): Extreme limitation in activity, significant assistance required; significant medical intervention or therapy required, hospitalization or hospice care probable.Baseline is defined as the value of the variable measured at Day 0 prior to dosing.
Mean Raxibacumab Concentration-time Following an IV Infusion Raxibacumab DoseFrom the date of the dose administration of study agent for this study (Day 0) until Day 56Blood was collected from each participant at the selected times: pre-dose (Day 0), 0.00347 hours (Day 0), 0.3333 hours (Day 0), Day 1, Day 3, Day 7, Day 14, Day 21, Day 28, Day 42, and Day 56 post-dose. Serum specimens were analyzed for raxibacumab using a validated electrochemiluminescense-based assay. The individual serum raxibacumab concentration data were summarized by nominal collection time and treatment group using descriptive statistics
Number of Participants With at Least a 2-grade Worsening From Baseline in Electrolyte ToxicitiesFrom the date of the dose administration of study agent for this study (Day 0) until Day 70The number of participants with at least a 2-grade worsening from Baseline in electrolyte toxicities is presented. Electrolyte function parameters were assessed using the modified Division of Microbiology and Infectious Diseases (DMID) toxicity tables, version 2.0.Grade 1 (Mild): Transient or mild discomfort (\< 48 hours); no medical intervention or therapy required. Grade 2 (Moderate): Mild to moderate limitation in activity, some assistance may be needed; no or minimal medical intervention or therapy required. Grade 3 (Severe): Marked limitation in activity, some assistance usually required; medical intervention or therapy required, hospitalizations possible. Grade 4 (Life-threatening): Extreme limitation in activity, significant assistance required; significant medical intervention or therapy required, hospitalization or hospice care probable. Baseline is defined as the value of the variable measured at Day 0 prior to dosing.

Participant flow

Recruitment details

Participants who had received raxibacumab \>= 4 months in another HGS study (study # HGS1021-C1064) prior to this study were eligible for enrollment in this study.

Participants by arm

ArmCount
Raxibacumab
Participants received their second dose of raxibacumab 40 milligrams/kilogram (mg/kg) by intravenous (IV) infusion. Participants were treated with oral diphenhydramine 50 mg up to 60 minutes prior to infusion of raxibacumab.
20
Total20

Baseline characteristics

CharacteristicRaxibacumab
Age, Continuous40.6 Years
STANDARD_DEVIATION 13.3
Race/Ethnicity, Customized
Black or African American
7 Participants
Race/Ethnicity, Customized
White
13 Participants
Sex: Female, Male
Female
8 Participants
Sex: Female, Male
Male
12 Participants

Adverse events

Event typeEG000
affected / at risk
deaths
Total, all-cause mortality
— / —
other
Total, other adverse events
8 / 20
serious
Total, serious adverse events
0 / 20

Outcome results

Primary

Number of Participants Who Developed a Positive Anti-raxibacumab Antibody Response

Number of participants who developed an positive anti-raxibacumab antibody response during the study were assessed.The antibody response to raxibacumab was assessed using a screening assay (i.e. by electrochemiluminescence counts). Positive samples would be further tested in an inhibition of binding assay to confirm the specificity of binding.

Time frame: From the date of the dose administration of study agent for this study (Day 0) until Day 70

Population: As-treated population : all participants who received 1 dose of study treatment.

ArmMeasureValue (NUMBER)
RaxibacumabNumber of Participants Who Developed a Positive Anti-raxibacumab Antibody Response0 Participants
Secondary

Mean Raxibacumab Concentration-time Following an IV Infusion Raxibacumab Dose

Blood was collected from each participant at the selected times: pre-dose (Day 0), 0.00347 hours (Day 0), 0.3333 hours (Day 0), Day 1, Day 3, Day 7, Day 14, Day 21, Day 28, Day 42, and Day 56 post-dose. Serum specimens were analyzed for raxibacumab using a validated electrochemiluminescense-based assay. The individual serum raxibacumab concentration data were summarized by nominal collection time and treatment group using descriptive statistics

Time frame: From the date of the dose administration of study agent for this study (Day 0) until Day 56

Population: As-treated population

ArmMeasureGroupValue (MEAN)Dispersion
RaxibacumabMean Raxibacumab Concentration-time Following an IV Infusion Raxibacumab DosePre-dose1.358 Micrograms/milliliter (µg/mL)Standard Deviation 1.879
RaxibacumabMean Raxibacumab Concentration-time Following an IV Infusion Raxibacumab Dose0.00347 hr979.078 Micrograms/milliliter (µg/mL)Standard Deviation 147.543
RaxibacumabMean Raxibacumab Concentration-time Following an IV Infusion Raxibacumab Dose0.3333 hr865.874 Micrograms/milliliter (µg/mL)Standard Deviation 122.602
RaxibacumabMean Raxibacumab Concentration-time Following an IV Infusion Raxibacumab DoseDay 1784.122 Micrograms/milliliter (µg/mL)Standard Deviation 118.68
RaxibacumabMean Raxibacumab Concentration-time Following an IV Infusion Raxibacumab DoseDay 3580.068 Micrograms/milliliter (µg/mL)Standard Deviation 94.776
RaxibacumabMean Raxibacumab Concentration-time Following an IV Infusion Raxibacumab DoseDay 7418.253 Micrograms/milliliter (µg/mL)Standard Deviation 62.35
RaxibacumabMean Raxibacumab Concentration-time Following an IV Infusion Raxibacumab DoseDay 14300.589 Micrograms/milliliter (µg/mL)Standard Deviation 41.689
RaxibacumabMean Raxibacumab Concentration-time Following an IV Infusion Raxibacumab DoseDay 21238.190 Micrograms/milliliter (µg/mL)Standard Deviation 39.515
RaxibacumabMean Raxibacumab Concentration-time Following an IV Infusion Raxibacumab DoseDay 28208.646 Micrograms/milliliter (µg/mL)Standard Deviation 44.802
RaxibacumabMean Raxibacumab Concentration-time Following an IV Infusion Raxibacumab DoseDay 42131.473 Micrograms/milliliter (µg/mL)Standard Deviation 44.308
RaxibacumabMean Raxibacumab Concentration-time Following an IV Infusion Raxibacumab DoseDay 5696.932 Micrograms/milliliter (µg/mL)Standard Deviation 46.637
Secondary

Number of Participants With Any Adverse Event (AE) or Any Serious Adverse Event (SAE) During the Treatment Period

An AE is defined as any untoward medical occurrence in a participant or clinical investigation participant, temporally associated with the use of a medicinal product, whether or not considered related to the medicinal product. This includes worsening (eg, increase in frequency or severity) of pre-existing conditions. A serious adverse event (SAE) is defined as any untoward medical occurrence that, at any dose, results in death, is life threatening, requires hospitalization or prolongation of existing hospitalization, results in disability/incapacity, or is a congenital anomaly/birth defect. Medical or scientific judgment should be exercised in deciding whether reporting is appropriate in other situations. Refer to the General Adverse AE/SAE module for a complete list of AEs and SAEs.

Time frame: From the date of the dose administration of study agent for this study (Day 0) until Day 70

Population: As-treated population

ArmMeasureGroupValue (NUMBER)
RaxibacumabNumber of Participants With Any Adverse Event (AE) or Any Serious Adverse Event (SAE) During the Treatment PeriodAny AE8 Participants
RaxibacumabNumber of Participants With Any Adverse Event (AE) or Any Serious Adverse Event (SAE) During the Treatment PeriodAny SAE0 Participants
Secondary

Number of Participants With at Least a 2-grade Worsening From Baseline in Electrolyte Toxicities

The number of participants with at least a 2-grade worsening from Baseline in electrolyte toxicities is presented. Electrolyte function parameters were assessed using the modified Division of Microbiology and Infectious Diseases (DMID) toxicity tables, version 2.0.Grade 1 (Mild): Transient or mild discomfort (\< 48 hours); no medical intervention or therapy required. Grade 2 (Moderate): Mild to moderate limitation in activity, some assistance may be needed; no or minimal medical intervention or therapy required. Grade 3 (Severe): Marked limitation in activity, some assistance usually required; medical intervention or therapy required, hospitalizations possible. Grade 4 (Life-threatening): Extreme limitation in activity, significant assistance required; significant medical intervention or therapy required, hospitalization or hospice care probable. Baseline is defined as the value of the variable measured at Day 0 prior to dosing.

Time frame: From the date of the dose administration of study agent for this study (Day 0) until Day 70

Population: As-treated population

ArmMeasureGroupValue (NUMBER)
RaxibacumabNumber of Participants With at Least a 2-grade Worsening From Baseline in Electrolyte ToxicitiesHypernatremia, any>=2-grade worsening0 Participants
RaxibacumabNumber of Participants With at Least a 2-grade Worsening From Baseline in Electrolyte ToxicitiesHyponatremia, any>=2-grade worsening0 Participants
RaxibacumabNumber of Participants With at Least a 2-grade Worsening From Baseline in Electrolyte ToxicitiesHyperkalemia, any>=2-grade worsening0 Participants
RaxibacumabNumber of Participants With at Least a 2-grade Worsening From Baseline in Electrolyte ToxicitiesHypokalemia, any>=2-grade worsening0 Participants
RaxibacumabNumber of Participants With at Least a 2-grade Worsening From Baseline in Electrolyte ToxicitiesHypomagnesemia, any>=2-grade worsening0 Participants
RaxibacumabNumber of Participants With at Least a 2-grade Worsening From Baseline in Electrolyte ToxicitiesHypercalcemia, any>=2-grade worsening0 Participants
RaxibacumabNumber of Participants With at Least a 2-grade Worsening From Baseline in Electrolyte ToxicitiesHypocalcemia, any>=2-grade worsening0 Participants
RaxibacumabNumber of Participants With at Least a 2-grade Worsening From Baseline in Electrolyte ToxicitiesHypophosphatemia, any>=2-grade worsening0 Participants
Secondary

Number of Participants With at Least a 2-grade Worsening From Baseline in Hematological Toxicities

The number of participants with at least a 2-grade worsening from Baseline in hematological toxicities is presented. Clinical hematological parameters were assessed using the modified Division of Microbiology and Infectious Diseases (DMID) toxicity tables, version 2.0. Grade 1 (Mild): Transient or mild discomfort (\< 48 hours); no medical intervention or therapy required. Grade 2 (Moderate): Mild to moderate limitation in activity, some assistance may be needed; no or minimal medical intervention or therapy required. Grade 3 (Severe): Marked limitation in activity, some assistance usually required; medical intervention or therapy required, hospitalizations possible. Grade 4 (Life-threatening): Extreme limitation in activity, significant assistance required; significant medical intervention or therapy required, hospitalization or hospice care probable. Baseline is defined as the value of the variable measured at Day 0 prior to dosing.

Time frame: From the date of the dose administration of study agent for this study (Day 0) until Day 70

Population: As-treated population

ArmMeasureGroupValue (NUMBER)
RaxibacumabNumber of Participants With at Least a 2-grade Worsening From Baseline in Hematological ToxicitiesLeukocytosis, any>=2-grade worsening0 Participants
RaxibacumabNumber of Participants With at Least a 2-grade Worsening From Baseline in Hematological ToxicitiesLeukopenia, any >=2-grade worsening0 Participants
RaxibacumabNumber of Participants With at Least a 2-grade Worsening From Baseline in Hematological ToxicitiesLymphopenia, any>=2-grade worsening1 Participants
RaxibacumabNumber of Participants With at Least a 2-grade Worsening From Baseline in Hematological ToxicitiesNeutropenia, any >=2-grade worsening0 Participants
RaxibacumabNumber of Participants With at Least a 2-grade Worsening From Baseline in Hematological ToxicitiesHemoglobin, any>=2-grade worsening0 Participants
RaxibacumabNumber of Participants With at Least a 2-grade Worsening From Baseline in Hematological ToxicitiesPlatelet, any>=2-grade worsening0 Participants
RaxibacumabNumber of Participants With at Least a 2-grade Worsening From Baseline in Hematological ToxicitiesProthrombin Time, any >=2-grade worsening1 Participants
RaxibacumabNumber of Participants With at Least a 2-grade Worsening From Baseline in Hematological ToxicitiesPartial Thromboplastin Time, any>=2grade worsening1 Participants
Secondary

Number of Participants With at Least a 2-grade Worsening From Baseline in Liver Toxicities

The number of participants with at least a 2-grade worsening from Baseline in liver toxicities is presented. Liver function parameters were assessed using the modified Division of Microbiology and Infectious Diseases (DMID) toxicity tables, version 2.0. Grade 1 (Mild): Transient or mild discomfort (\< 48 hours); no medical intervention or therapy required. Grade 2 (Moderate): Mild to moderate limitation in activity, some assistance may be needed; no or minimal medical intervention or therapy required. Grade 3 (Severe): Marked limitation in activity, some assistance usually required; medical intervention or therapy required, hospitalizations possible. Grade 4 (Life-threatening): Extreme limitation in activity, significant assistance required; significant medical intervention or therapy required, hospitalization or hospice care probable. Baseline is defined as the value of the variable measured at Day 0 prior to dosing.

Time frame: From the date of the dose administration of study agent for this study (Day 0) until Day 70

Population: As-treated population

ArmMeasureGroupValue (NUMBER)
RaxibacumabNumber of Participants With at Least a 2-grade Worsening From Baseline in Liver ToxicitiesAST, any>=2-grade worsening0 Participants
RaxibacumabNumber of Participants With at Least a 2-grade Worsening From Baseline in Liver ToxicitiesALT, any>=2-grade worsening1 Participants
RaxibacumabNumber of Participants With at Least a 2-grade Worsening From Baseline in Liver ToxicitiesGGT, any>=2-grade worsening0 Participants
RaxibacumabNumber of Participants With at Least a 2-grade Worsening From Baseline in Liver ToxicitiesAlkaline phosphatase, any>=2-grade worsening0 Participants
RaxibacumabNumber of Participants With at Least a 2-grade Worsening From Baseline in Liver ToxicitiesHyperbilirubinemia, any>=2-grade worsening0 Participants
Secondary

Number of Participants With at Least a 2-grade Worsening From Baseline in Other Chemistry Toxicities

The number of participants with at least a 2-grade worsening from Baseline in other chemistry toxicities is presented. Other clinical chemistry parameters were assessed using the modified Division of Microbiology and Infectious Diseases (DMID) toxicity tables, version 2.0. Grade 1 (Mild): Transient or mild discomfort (\< 48 hours); no medical intervention or therapy required. Grade 2 (Moderate): Mild to moderate limitation in activity, some assistance may be needed; no or minimal medical intervention or therapy required. Grade 3 (Severe): Marked limitation in activity, some assistance usually required; medical intervention or therapy required, hospitalizations possible. Grade 4 (Life-threatening): Extreme limitation in activity, significant assistance required; significant medical intervention or therapy required, hospitalization or hospice care probable.Baseline is defined as the value of the variable measured at Day 0 prior to dosing.

Time frame: From the date of the dose administration of study agent for this study (Day 0) until Day 70

Population: As-treated population

ArmMeasureGroupValue (NUMBER)
RaxibacumabNumber of Participants With at Least a 2-grade Worsening From Baseline in Other Chemistry ToxicitiesCreatinine, any>=2-grade worsening0 Participants
RaxibacumabNumber of Participants With at Least a 2-grade Worsening From Baseline in Other Chemistry ToxicitiesHypoalbuminemia, any>=2-grade worsening0 Participants
RaxibacumabNumber of Participants With at Least a 2-grade Worsening From Baseline in Other Chemistry ToxicitiesHyperuricemia, any>=2-grade worsening0 Participants
RaxibacumabNumber of Participants With at Least a 2-grade Worsening From Baseline in Other Chemistry ToxicitiesHyperglycemia, any>=2-grade worsening1 Participants
RaxibacumabNumber of Participants With at Least a 2-grade Worsening From Baseline in Other Chemistry ToxicitiesHypoglycemia, any>=2-grade worsening0 Participants
RaxibacumabNumber of Participants With at Least a 2-grade Worsening From Baseline in Other Chemistry ToxicitiesAmylase, any>=2-grade worsening0 Participants
Secondary

Number of Participants With at Least a 2-grade Worsening From Baseline in Urinalysis Toxicities

Urinalysis parameters were assessed using the modified Division of Microbiology and Infectious Diseases (DMID) toxicity tables, version 2.0. Grade 1 (Mild): Transient or mild discomfort (\< 48 hours); no medical intervention or therapy required. Grade 2 (Moderate): Mild to moderate limitation in activity, some assistance may be needed; no or minimal medical intervention or therapy required. Grade 3 (Severe): Marked limitation in activity, some assistance usually required; medical intervention or therapy required, hospitalizations possible. Grade 4 (Life-threatening): Extreme limitation in activity, significant assistance required; significant medical intervention or therapy required, hospitalization or hospice care probable.Baseline is defined as the value of the variable measured at Day 0 prior to dosing.

Time frame: From the date of the dose administration of study agent for this study (Day 0) until Day 70

Population: As-treated population

ArmMeasureValue (NUMBER)
RaxibacumabNumber of Participants With at Least a 2-grade Worsening From Baseline in Urinalysis Toxicities0 Participants
Secondary

Number of Participants With Electrolyte Toxicities of the Indicated Grade

Electrolyte function parameters were assessed using the modified Division of Microbiology and Infectious Diseases (DMID) toxicity tables, version 2.0. Grade 1 (Mild): Transient or mild discomfort (\< 48 hours); no medical intervention or therapy required. Grade 2 (Moderate): Mild to moderate limitation in activity, some assistance may be needed; no or minimal medical intervention or therapy required. Grade 3 (Severe): Marked limitation in activity, some assistance usually required; medical intervention or therapy required, hospitalizations possible. Grade 4 (Life-threatening): Extreme limitation in activity, significant assistance required; significant medical intervention or therapy required, hospitalization or hospice care probable.

Time frame: From the date of the dose administration of study agent for this study (Day 0) until Day 70

Population: As-treated population

ArmMeasureGroupValue (NUMBER)
RaxibacumabNumber of Participants With Electrolyte Toxicities of the Indicated GradeHyponatremia, Grade 12 Participants
RaxibacumabNumber of Participants With Electrolyte Toxicities of the Indicated GradeHypomagnesemia, Grade 40 Participants
RaxibacumabNumber of Participants With Electrolyte Toxicities of the Indicated GradeHypernatremia, Grade 10 Participants
RaxibacumabNumber of Participants With Electrolyte Toxicities of the Indicated GradeHypernatremia, Grade 20 Participants
RaxibacumabNumber of Participants With Electrolyte Toxicities of the Indicated GradeHypernatremia, Grade 30 Participants
RaxibacumabNumber of Participants With Electrolyte Toxicities of the Indicated GradeHypernatremia, Grade 40 Participants
RaxibacumabNumber of Participants With Electrolyte Toxicities of the Indicated GradeHyponatremia, Grade 20 Participants
RaxibacumabNumber of Participants With Electrolyte Toxicities of the Indicated GradeHyponatremia, Grade 30 Participants
RaxibacumabNumber of Participants With Electrolyte Toxicities of the Indicated GradeHyponatremia, Grade 40 Participants
RaxibacumabNumber of Participants With Electrolyte Toxicities of the Indicated GradeHyperkalemia, Grade 11 Participants
RaxibacumabNumber of Participants With Electrolyte Toxicities of the Indicated GradeHyperkalemia, Grade 20 Participants
RaxibacumabNumber of Participants With Electrolyte Toxicities of the Indicated GradeHyperkalemia, Grade 30 Participants
RaxibacumabNumber of Participants With Electrolyte Toxicities of the Indicated GradeHyperkalemia, Grade 40 Participants
RaxibacumabNumber of Participants With Electrolyte Toxicities of the Indicated GradeHypokalemia, Grade 10 Participants
RaxibacumabNumber of Participants With Electrolyte Toxicities of the Indicated GradeHypokalemia, Grade 20 Participants
RaxibacumabNumber of Participants With Electrolyte Toxicities of the Indicated GradeHypokalemia, Grade 30 Participants
RaxibacumabNumber of Participants With Electrolyte Toxicities of the Indicated GradeHypokalemia, Grade 40 Participants
RaxibacumabNumber of Participants With Electrolyte Toxicities of the Indicated GradeHypomagnesemia, Grade 10 Participants
RaxibacumabNumber of Participants With Electrolyte Toxicities of the Indicated GradeHypomagnesemia, Grade 20 Participants
RaxibacumabNumber of Participants With Electrolyte Toxicities of the Indicated GradeHypomagnesemia, Grade 30 Participants
RaxibacumabNumber of Participants With Electrolyte Toxicities of the Indicated GradeHypercalcemia, Grade 10 Participants
RaxibacumabNumber of Participants With Electrolyte Toxicities of the Indicated GradeHypercalcemia, Grade 20 Participants
RaxibacumabNumber of Participants With Electrolyte Toxicities of the Indicated GradeHypercalcemia, Grade 30 Participants
RaxibacumabNumber of Participants With Electrolyte Toxicities of the Indicated GradeHypercalcemia, Grade 40 Participants
RaxibacumabNumber of Participants With Electrolyte Toxicities of the Indicated GradeHypocalcemia, Grade 10 Participants
RaxibacumabNumber of Participants With Electrolyte Toxicities of the Indicated GradeHypocalcemia, Grade 20 Participants
RaxibacumabNumber of Participants With Electrolyte Toxicities of the Indicated GradeHypocalcemia, Grade 30 Participants
RaxibacumabNumber of Participants With Electrolyte Toxicities of the Indicated GradeHypocalcemia, Grade 40 Participants
RaxibacumabNumber of Participants With Electrolyte Toxicities of the Indicated GradeHypophosphatemia, Grade 11 Participants
RaxibacumabNumber of Participants With Electrolyte Toxicities of the Indicated GradeHypophosphatemia, Grade 20 Participants
RaxibacumabNumber of Participants With Electrolyte Toxicities of the Indicated GradeHypophosphatemia, Grade 30 Participants
RaxibacumabNumber of Participants With Electrolyte Toxicities of the Indicated GradeHypophosphatemia, Grade 40 Participants
Secondary

Number of Participants With Hematological Toxicities of the Indicated Grade

Clinical hematological parameters were assessed using the modified Division of Microbiology and Infectious Diseases (DMID) toxicity tables, version 2.0. Grade 1 (Mild): Transient or mild discomfort (\< 48 hours); no medical intervention or therapy required. Grade 2 (Moderate): Mild to moderate limitation in activity, some assistance may be needed; no or minimal medical intervention or therapy required. Grade 3 (Severe): Marked limitation in activity, some assistance usually required; medical intervention or therapy required, hospitalizations possible. Grade 4 (Life-threatening): Extreme limitation in activity, significant assistance required; significant medical intervention or therapy required, hospitalization or hospice care probable.

Time frame: From the date of the dose administration of study agent for this study (Day 0) until Day 70

Population: As-treated population

ArmMeasureGroupValue (NUMBER)
RaxibacumabNumber of Participants With Hematological Toxicities of the Indicated GradeLeukocytosis, Grade 10 Participants
RaxibacumabNumber of Participants With Hematological Toxicities of the Indicated GradeLeukocytosis, Grade 20 Participants
RaxibacumabNumber of Participants With Hematological Toxicities of the Indicated GradeLeukocytosis, Grade 30 Participants
RaxibacumabNumber of Participants With Hematological Toxicities of the Indicated GradeLeukocytosis, Grade 40 Participants
RaxibacumabNumber of Participants With Hematological Toxicities of the Indicated GradeLeukopenia, Grade 15 Participants
RaxibacumabNumber of Participants With Hematological Toxicities of the Indicated GradeLeukopenia, Grade 20 Participants
RaxibacumabNumber of Participants With Hematological Toxicities of the Indicated GradeLeukopenia, Grade 30 Participants
RaxibacumabNumber of Participants With Hematological Toxicities of the Indicated GradeLeukopenia, Grade 40 Participants
RaxibacumabNumber of Participants With Hematological Toxicities of the Indicated GradeLymphopenia, Grade 10 Participants
RaxibacumabNumber of Participants With Hematological Toxicities of the Indicated GradeLymphopenia, Grade 21 Participants
RaxibacumabNumber of Participants With Hematological Toxicities of the Indicated GradeLymphopenia, Grade 30 Participants
RaxibacumabNumber of Participants With Hematological Toxicities of the Indicated GradeLymphopenia, Grade 40 Participants
RaxibacumabNumber of Participants With Hematological Toxicities of the Indicated GradeNeutropenia, Grade 12 Participants
RaxibacumabNumber of Participants With Hematological Toxicities of the Indicated GradeNeutropenia, Grade 20 Participants
RaxibacumabNumber of Participants With Hematological Toxicities of the Indicated GradeNeutropenia, Grade 30 Participants
RaxibacumabNumber of Participants With Hematological Toxicities of the Indicated GradeNeutropenia, Grade 40 Participants
RaxibacumabNumber of Participants With Hematological Toxicities of the Indicated GradeHemoglobin, Grade 11 Participants
RaxibacumabNumber of Participants With Hematological Toxicities of the Indicated GradeHemoglobin, Grade 20 Participants
RaxibacumabNumber of Participants With Hematological Toxicities of the Indicated GradeHemoglobin, Grade 30 Participants
RaxibacumabNumber of Participants With Hematological Toxicities of the Indicated GradeHemoglobin, Grade 40 Participants
RaxibacumabNumber of Participants With Hematological Toxicities of the Indicated GradePlatelet, Grade 10 Participants
RaxibacumabNumber of Participants With Hematological Toxicities of the Indicated GradePlatelet, Grade 20 Participants
RaxibacumabNumber of Participants With Hematological Toxicities of the Indicated GradePlatelet, Grade 30 Participants
RaxibacumabNumber of Participants With Hematological Toxicities of the Indicated GradePlatelet, Grade 40 Participants
RaxibacumabNumber of Participants With Hematological Toxicities of the Indicated GradeProthrombin Time, Grade 10 Participants
RaxibacumabNumber of Participants With Hematological Toxicities of the Indicated GradeProthrombin Time, Grade 20 Participants
RaxibacumabNumber of Participants With Hematological Toxicities of the Indicated GradeProthrombin Time, Grade 30 Participants
RaxibacumabNumber of Participants With Hematological Toxicities of the Indicated GradeProthrombin Time, Grade 41 Participants
RaxibacumabNumber of Participants With Hematological Toxicities of the Indicated GradePartial Thromboplastin Time, Grade 10 Participants
RaxibacumabNumber of Participants With Hematological Toxicities of the Indicated GradePartial Thromboplastin Time, Grade 21 Participants
RaxibacumabNumber of Participants With Hematological Toxicities of the Indicated GradePartial Thromboplastin Time, Grade 30 Participants
RaxibacumabNumber of Participants With Hematological Toxicities of the Indicated GradePartial Thromboplastin Time, Grade 40 Participants
Secondary

Number of Participants With Liver Toxicities of the Indicated Grade

Liver function parameters were assessed using the modified Division of Microbiology and Infectious Diseases (DMID) toxicity tables, version 2.0. Grade 1 (Mild): Transient or mild discomfort (\< 48 hours); no medical intervention or therapy required. Grade 2 (Moderate): Mild to moderate limitation in activity, some assistance may be needed; no or minimal medical intervention or therapy required. Grade 3 (Severe): Marked limitation in activity, some assistance usually required; medical intervention or therapy required, hospitalizations possible. Grade 4 (Life-threatening): Extreme limitation in activity, significant assistance required; significant medical intervention or therapy required, hospitalization or hospice care probable.

Time frame: From the date of the dose administration of study agent for this study (Day 0) until Day 70

Population: As-treated population

ArmMeasureGroupValue (NUMBER)
RaxibacumabNumber of Participants With Liver Toxicities of the Indicated GradeAlkaline Phosphatase, Grade 40 Participants
RaxibacumabNumber of Participants With Liver Toxicities of the Indicated GradeAspartate amino transferase (AST), Grade 12 Participants
RaxibacumabNumber of Participants With Liver Toxicities of the Indicated GradeAST, Grade 20 Participants
RaxibacumabNumber of Participants With Liver Toxicities of the Indicated GradeAST, Grade 30 Participants
RaxibacumabNumber of Participants With Liver Toxicities of the Indicated GradeAST, Grade 40 Participants
RaxibacumabNumber of Participants With Liver Toxicities of the Indicated GradeAlanine amino transferase(ALT), Grade 11 Participants
RaxibacumabNumber of Participants With Liver Toxicities of the Indicated GradeALT, Grade 21 Participants
RaxibacumabNumber of Participants With Liver Toxicities of the Indicated GradeALT, Grade 30 Participants
RaxibacumabNumber of Participants With Liver Toxicities of the Indicated GradeALT, Grade 40 Participants
RaxibacumabNumber of Participants With Liver Toxicities of the Indicated GradeGamma-glutayl-transferase (GGT), Grade 10 Participants
RaxibacumabNumber of Participants With Liver Toxicities of the Indicated GradeGGT, Grade 20 Participants
RaxibacumabNumber of Participants With Liver Toxicities of the Indicated GradeGGT, Grade 30 Participants
RaxibacumabNumber of Participants With Liver Toxicities of the Indicated GradeGGT, Grade 40 Participants
RaxibacumabNumber of Participants With Liver Toxicities of the Indicated GradeAlkaline Phosphatase, Grade 10 Participants
RaxibacumabNumber of Participants With Liver Toxicities of the Indicated GradeAlkaline Phosphatase, Grade 20 Participants
RaxibacumabNumber of Participants With Liver Toxicities of the Indicated GradeAlkaline Phosphatase, Grade 30 Participants
RaxibacumabNumber of Participants With Liver Toxicities of the Indicated GradeHyperbilirubinemia, Grade 10 Participants
RaxibacumabNumber of Participants With Liver Toxicities of the Indicated GradeHyperbilirubinemia, Grade 20 Participants
RaxibacumabNumber of Participants With Liver Toxicities of the Indicated GradeHyperbilirubinemia, Grade 30 Participants
RaxibacumabNumber of Participants With Liver Toxicities of the Indicated GradeHyperbilirubinemia, Grade 40 Participants
Secondary

Number of Participants With Other Chemistry Toxicities of the Indicated Grade

Other chemistry parameters were assessed using the modified Division of Microbiology and Infectious Diseases (DMID) toxicity tables, version 2.0. Grade 1 (Mild): Transient or mild discomfort (\< 48 hours); no medical intervention or therapy required. Grade 2 (Moderate): Mild to moderate limitation in activity, some assistance may be needed; no or minimal medical intervention or therapy required. Grade 3 (Severe): Marked limitation in activity, some assistance usually required; medical intervention or therapy required, hospitalizations possible. Grade 4 (Life-threatening): Extreme limitation in activity, significant assistance required; significant medical intervention or therapy required, hospitalization or hospice care probable.

Time frame: From the date of the dose administration of study agent for this study (Day 0) until Day 70

Population: As-treated population

ArmMeasureGroupValue (NUMBER)
RaxibacumabNumber of Participants With Other Chemistry Toxicities of the Indicated GradeCreatinine, Grade 10 Participants
RaxibacumabNumber of Participants With Other Chemistry Toxicities of the Indicated GradeCreatinine, Grade 20 Participants
RaxibacumabNumber of Participants With Other Chemistry Toxicities of the Indicated GradeCreatinine, Grade 30 Participants
RaxibacumabNumber of Participants With Other Chemistry Toxicities of the Indicated GradeCreatinine, Grade 40 Participants
RaxibacumabNumber of Participants With Other Chemistry Toxicities of the Indicated GradeHypoalbuminemia, Grade 10 Participants
RaxibacumabNumber of Participants With Other Chemistry Toxicities of the Indicated GradeHypoalbuminemia, Grade 20 Participants
RaxibacumabNumber of Participants With Other Chemistry Toxicities of the Indicated GradeHypoalbuminemia, Grade 30 Participants
RaxibacumabNumber of Participants With Other Chemistry Toxicities of the Indicated GradeHypoalbuminemia, Grade 40 Participants
RaxibacumabNumber of Participants With Other Chemistry Toxicities of the Indicated GradeHyperuricemia, Grade 11 Participants
RaxibacumabNumber of Participants With Other Chemistry Toxicities of the Indicated GradeHyperuricemia, Grade 20 Participants
RaxibacumabNumber of Participants With Other Chemistry Toxicities of the Indicated GradeHyperuricemia, Grade 30 Participants
RaxibacumabNumber of Participants With Other Chemistry Toxicities of the Indicated GradeHyperuricemia, Grade 40 Participants
RaxibacumabNumber of Participants With Other Chemistry Toxicities of the Indicated GradeHyperglycemia, Grade 14 Participants
RaxibacumabNumber of Participants With Other Chemistry Toxicities of the Indicated GradeHyperglycemia, Grade 21 Participants
RaxibacumabNumber of Participants With Other Chemistry Toxicities of the Indicated GradeHyperglycemia, Grade 30 Participants
RaxibacumabNumber of Participants With Other Chemistry Toxicities of the Indicated GradeHyperglycemia, Grade 40 Participants
RaxibacumabNumber of Participants With Other Chemistry Toxicities of the Indicated GradeHypoglycemia, Grade 12 Participants
RaxibacumabNumber of Participants With Other Chemistry Toxicities of the Indicated GradeHypoglycemia, Grade 20 Participants
RaxibacumabNumber of Participants With Other Chemistry Toxicities of the Indicated GradeHypoglycemia, Grade 30 Participants
RaxibacumabNumber of Participants With Other Chemistry Toxicities of the Indicated GradeHypoglycemia, Grade 40 Participants
RaxibacumabNumber of Participants With Other Chemistry Toxicities of the Indicated GradeAmylase, Grade 13 Participants
RaxibacumabNumber of Participants With Other Chemistry Toxicities of the Indicated GradeAmylase, Grade 21 Participants
RaxibacumabNumber of Participants With Other Chemistry Toxicities of the Indicated GradeAmylase, Grade 30 Participants
RaxibacumabNumber of Participants With Other Chemistry Toxicities of the Indicated GradeAmylase, Grade 40 Participants
Secondary

Number of Participants With Urinalysis Toxicities of the Indicated Grade

Urinaysis parameters were assessed using the modified Division of Microbiology and Infectious Diseases (DMID) toxicity tables, version 2.0. Grade 1 (Mild): Transient or mild discomfort (\< 48 hours); no medical intervention or therapy required. Grade 2 (Moderate): Mild to moderate limitation in activity, some assistance may be needed; no or minimal medical intervention or therapy required. Grade 3 (Severe): Marked limitation in activity, some assistance usually required; medical intervention or therapy required, hospitalizations possible. Grade 4 (Life-threatening): Extreme limitation in activity, significant assistance required; significant medical intervention or therapy required, hospitalization or hospice care probable.

Time frame: From the date of the dose administration of study agent for this study (Day 0) until Day 70

Population: As-treated population

ArmMeasureValue (NUMBER)
RaxibacumabNumber of Participants With Urinalysis Toxicities of the Indicated Grade0 Participants

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026