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A Study to Test Bioavailability of of 2 New Formulations of UCB0599 in Healthy Participants in Part A and to Test Safety, Tolerability, and Pharmacokinetic (PK) of UCB0599 in Healthy Japanese and Chinese Participants in Part B

A 2-Part Study to Evaluate the Relative Bioavailability of 2 New Formulations of UCB0599 and the Effect of Esomeprazole on the PK of UCB0599 in Healthy Participants (Part A, Open-Label) and to Assess the Safety/Tolerability and PK of UCB0599 in Healthy Participants of Japanese and Chinese Origins (Part B, Double-Blind)

Status
Completed
Phases
Phase 1
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT05845645
Enrollment
73
Registered
2023-05-06
Start date
2023-05-31
Completion date
2024-04-13
Last updated
2025-12-22

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

Conditions

Healthy Study Participants

Keywords

Phase 1, Healthy Study Participants, UCB0599, Bioavailability study

Brief summary

The purpose of the study is to estimate the relative bioavailability of 2 new UCB0599 formulations under elevated and normal gastric pH conditions in healthy participants (Part A) and to asess the safety, tolerability and pharmacokinetics of UCB0599 in healthy participants of Japanese and Chinese origins (Part B).

Interventions

Study participants will receive pre-specified doses of UCB0599 in 3 different formulations administered orally in a pre-specified sequence during the Treatment Periods of Part A and B

OTHEREsomeprazole

Study participants will receive fixed dose of esomeprazole administered orally in a pre-specified sequence during the Treatment Period of Part A. This is a non-investigational medicinal product (NIMP) in this study.

OTHERPlacebo

Study participants will receive placebo comparator administered orally in a a pre-specified sequence during the Treatment Period of Part B.

Sponsors

UCB Biopharma SRL
Lead SponsorINDUSTRY

Study design

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

Masking description

Part A is open-label and Part B double-blind (Participants will be blinded to the treatment (ie, UCB0599 or Placebo), but not to the dosage).

Intervention model description

Part A of the study is following a full crossover design and Part B is a parallel design with crossover character referring to the dose levels.

Eligibility

Sex/Gender
ALL
Age
18 Years to 55 Years
Healthy volunteers
Yes

Inclusion criteria

* Part A only: all healthy study participants except for those participants who are eligible for Part B of the study * For participants of Japanese origin (Part B): study participant is of Japanese descent as evidenced by appearance and verbal confirmation of familial heritage (a participant has all 4 Japanese grandparents born in Japan). For participants of Chinese origin (Part B): study participant is of Chinese descent as evidenced by appearance and verbal confirmation of familial heritage (a participant has all 4 Chinese grandparents born in China). * Body weight within 45 to 100 kg (female) and 50 to 100 kg (male) and body mass index (BMI) within the range 18 to 30 kg/m\^2 (inclusive at screening) * Healthy male and female study participants

Exclusion criteria

* Participant has any medical or psychiatric condition that, in the opinion of the Investigator, could jeopardize or would compromise the study participant's ability to participate in this study * Participant has a history or presence of/significant history of cardiovascular, respiratory, hepatic, renal, gastrointestinal, endocrinological, hematological, or neurological disorders capable of significantly altering the absorption, metabolism, or elimination of drugs; constituting a risk when taking the study intervention; or interfering with the interpretation of data * Participant has had lymphoma, leukemia, or any malignancy within the past 5 years, except for basal cell carcinomas that have been resected, squamous epithelial carcinomas of the skin that have been resected with no evidence of metastatic disease for 3 years * Participant has had breast cancer within the past 10 years * Participant has a history of alcohol or drug abuse within the last 1 year from Screening, as defined according to the Diagnostic and Statistical Manual of Mental Disorders * Participant has a known hypersensitivity to any components of the study medication or comparative drugs as stated in this protocol * Participant has a consumption of more than 600 mg of caffeine/day at screening and throughout the study * Participant has consumed any grapefruit, grapefruit juice, grapefruit-containing products, or star fruit within 14 days prior to administration of study medication or is not willing to refrain from consuming these products for the duration of the study * Participant has previously participated in this study or participant has previously been assigned to treatment in a study of the medication under investigation in this study * Participant has participated in another study of a study medication (and/or an investigational device) within the previous 30 days or 5 half-lives, whichever is greatest, or is currently participating in another study of an study medication (and/or an investigational device) * Presence of hepatitis B surface antigen (HBsAg) at screening or within 3 months prior to dosing * Positive hepatitis C antibody test (HCVAb) result at screening or within 3 months prior to starting study intervention * Positive hepatitis C ribonucleic acid (RNA) test result at screening or within 3 months prior to first dose of study medication * Current or chronic history of liver disease or known hepatic or biliary abnormalities (with the exception of Gilbert's syndrome or asymptomatic gallstones) * For women of childbearing potential, study participant is pregnant, planning on becoming pregnant during the study, or is breastfeeding * Participants who may have a history of confirmed gastric ulceration

Design outcomes

Primary

MeasureTime frameDescription
Area Under the Plasma Concentration-time Curve From Time 0 to Infinity (AUC (Inf)) of UCB0599 in Part BPredose and at 0.25, 0.5, 1, 1.5, 2, 4, 8, 12, 24, 36, 48, 72, and 96 hours after UCB0599 administration on Days 1, and 6 in Part BAUC inf was area under the plasma concentration-time curve from time 0 to infinity of UCB0599.
Percentage of Study Participants With Treatment-emergent Adverse Events (TEAEs) Leading to Withdrawal From Study in Part BFrom Baseline (Day 1) to Safety Follow-up Period of Part B (up to Day 15): An AE was any untoward medical occurrence in a patient or clinical study participant, temporally associated with the use of study medication, whether or not considered related to the study medication. A TEAE was defined as AEs starting on/after the date/time of first treatment & upto including 4 days after last treatment or any unresolved event already present before administration of treatment that worsens in intensity following exposure to treatment.
Maximum Plasma Concentration (Cmax) of UCB0599 in Part BPredose and at 0.25, 0.5, 1, 1.5, 2, 4, 8, 12, 24, 36, 48, 72, and 96 hours after UCB0599 administration on Days 1, and 6 in Part BCmax was maximum (peak) observed drug concentration following a single dose administration of UCB0599.
Area Under the Plasma Concentration-time Curve From Time 0 to the Last Quantifiable Concentration (AUC(0-t)) of UCB0599 in Part BPredose and at 0.25, 0.5, 1, 1.5, 2, 4, 8, 12, 24, 36, 48, 72, and 96 hours after UCB0599 administration on Days 1, and 6 in Part BAUC(0-t) was area under the plasma concentration-time curve from time 0 to the last quantifiable concentration of UCB0599.
Maximum Plasma Concentration (Cmax) of UCB0599 in Part APredose and at 0.25, 0.5, 1, 1.5, 2, 4, 8, 12, 24, 36, 48, 72, and 96 hours after UCB0599 administration on Days 1, 6, 11, 19, 24 and 29 in Part ACmax was maximum (peak) observed drug concentration following a single dose administration of UCB0599 under normal and elevated gastric pH condition.
Area Under the Plasma Concentration-time Curve From Time 0 to the Last Quantifiable Concentration (AUC(0-t)) of UCB0599 in Part APredose and at 0.25, 0.5, 1, 1.5, 2, 4, 8, 12, 24, 36, 48, 72, and 96 hours after UCB0599 administration on Days 1, 6, 11, 19, 24 and 29 in Part AAUC(0-t) was area under the plasma concentration-time curve from time 0 to the last quantifiable concentration of UCB0599 under normal and elevated gastric pH condition.
Area Under the Plasma Concentration-time Curve From Time 0 to Infinity (AUC Inf) of UCB0599 in Part APredose and at 0.25, 0.5, 1, 1.5, 2, 4, 8, 12, 24, 36, 48, 72, and 96 hours after UCB0599 administration on Days 1, 6, 11, 19, 24 and 29 in Part AAUC inf was area under the plasma concentration-time curve from time 0 to infinity of UCB0599 under normal and elevated gastric pH condition.
Percentage of Study Participants With Treatment-emergent Adverse Events (TEAEs) in Part BFrom Baseline (Day 1) to Safety Follow-up Period of Part B (up to Day 15)An AE was any untoward medical occurrence in a patient or clinical study participant, temporally associated with the use of study medication, whether or not considered related to the study medication. A TEAE was defined as AEs starting on/after the date/time of first treatment & upto including 4 days after last treatment or any unresolved event already present before administration of treatment that worsens in intensity following exposure to treatment.
Percentage of Study Participants With Serious Treatment-emergent Adverse Events (Serious TEAEs) in Part BFrom Baseline (Day 1) to Safety Follow-up Period of Part B (up to Day 15)Serious TEAEs were any untoward medical incidence in a participant during administered study treatment, whether or not these events were related to study treatment and additionally were emergent untoward medical occurrence that at any dose: 1. Results in death 2. Is life-threatening 3. Required in patient hospitalisation or prolongation of existing hospitalisation 4. Results in persistent disability/incapacity 5. Was a congenital anomaly or birth defect 6. Important medical events

Secondary

MeasureTime frameDescription
Percentage of Study Participants With Serious Treatment-emergent Adverse Events (TEAEs) in Part AFrom Baseline (Day 1) to Safety Follow-up Period of Part A (up to Day 39)Serious TEAEs were any untoward medical incidence in a participant during administered study treatment, whether or not these events were related to study treatment and additionally were emergent untoward medical occurrence that at any dose: 1. Results in death 2. Is life-threatening 3. Required in patient hospitalisation or prolongation of existing hospitalisation 4. Results in persistent disability/incapacity 5. Was a congenital anomaly or birth defect 6. Important medical events
Percentage of Study Participants With Treatment-emergent Adverse Events (TEAEs) Leading to Withdrawal From Study in Part AFrom Baseline (Day 1) to Safety Follow-up Period of Part A (up to Day 39)
Percentage of Study Participants With Treatment-emergent Adverse Events (TEAEs) in Part AFrom Baseline (Day 1) to Safety Follow-up Period of Part A (up to Day 39)An AE was any untoward medical occurrence in a patient or clinical study participant, temporally associated with the use of study medication, whether or not considered related to the study medication. A TEAE was defined as AEs starting on/after the date/time of first treatment & upto including 4 days after last treatment or any unresolved event already present before administration of treatment that worsens in intensity following exposure to treatment.

Countries

United States

Participant flow

Recruitment details

The study started to enroll participants in May 2023 and concluded in April 2024.

Pre-assignment details

The Participant Flow refers to the Randomized Set Part A and Randomized Set Part B. Part A: P1, P2, P3, P4, P5, and P6 refer to period 1 to 6.

Participants by arm

ArmCount
Part A: Treatment Sequence: ABC
Participants received a single dose of UCB0599 180 milligrams (mg) capsule (reference) (Treatment A) under fasting conditions on Day 1 in Period (P) 1 (normal gastric pH) and Day 19 in Period 4 (elevated gastric pH), followed by a single dose of UCB0599 180 mg non-encapsulated tablet (Treatment B) under fasting conditions on Day 6 in Period 2 (normal gastric pH) and Day 24 in Period 5 (elevated gastric pH), further followed by a single dose of UCB0599 180 mg encapsulated tablet (Treatment C) under fasting conditions on Day 11 in Period 3 (normal gastric pH) and Day 29 in Period 6 (elevated gastric pH). In Periods 4, 5, and 6 (elevated gastric pH), esomeprazole 40 mg was coadministered once daily from Day 14 to Day 33. Each treatment period was followed by a 4-day Washout period.
7
Part A: Treatment Sequence: ACB
Participants received a single dose of UCB0599 180 mg capsule (reference) (Treatment A) under fasting conditions on Day 1 in Period 1 (normal gastric pH) and Day 19 in Period 4 (elevated gastric pH), followed by a single dose of UCB0599 180 mg encapsulated tablet (Treatment C) under fasting conditions on Day 6 in Period 2 (normal gastric pH) and Day 24 in Period 5 (elevated gastric pH), further followed by a single dose of UCB0599 180 mg non-encapsulated tablet (Treatment B) under fasting conditions on Day 11 in Period 3 (normal gastric pH) and Day 29 in Period 6 (elevated gastric pH). In Periods 4, 5, and 6 (elevated gastric pH), esomeprazole 40 mg was coadministered once daily from Day 14 to Day 33. Each treatment period was followed by a 4-day Washout period.
7
Part A: Treatment Sequence: BCA
Participants received a single dose of UCB0599 180 mg non-encapsulated tablet (Treatment B) under fasting conditions on Day 1 in Period 1 (normal gastric pH) and Day 19 in Period 4 (elevated gastric pH), followed by a single dose of UCB0599 180 mg encapsulated tablet (Treatment C) under fasting conditions on Day 6 in Period 2 (normal gastric pH) and Day 24 in Period 5 (elevated gastric pH), further followed by a single dose of UCB0599 180 mg capsule (Treatment A) under fasting conditions on Day 11 in Period 3 (normal gastric pH) and Day 29 in Period 6 (elevated gastric pH). In Periods 4, 5, and 6 (elevated gastric pH), esomeprazole 40 mg was coadministered once daily from Day 14 to Day 33. Each treatment period was followed by a 4-day Washout period.
7
Part A: Treatment Sequence: BAC
Participants received a single dose of UCB0599 180 mg non-encapsulated tablet (Treatment B) under fasting conditions on Day 1 in Period 1 (normal gastric pH) and Day 19 in Period 4 (elevated gastric pH), followed by a single dose of UCB0599 180 mg capsule under fasting conditions (Treatment A) on Day 6 in Period 2 (normal gastric pH) and Day 24 in Period 5 (elevated gastric pH), further followed by a single dose of UCB0599 180 mg encapsulated tablet (Treatment C) under fasting conditions on Day 11 in Period 3 (normal gastric pH) and Day 29 in Period 6 (elevated gastric pH). In Period 4,5 and 6 (elevated gastric pH) esomeprazole 40 mg once daily was coadministered from day 14 to 33. Each treatment period was followed by a 4-day Washout Period.
7
Part A: Treatment Sequence: CAB
Participants received a single dose of UCB0599 180 mg encapsulated tablet (Treatment C) under fasting conditions on Day 1 in Period 1 (normal gastric pH) and Day 19 in Period 4 (elevated gastric pH), followed by a single dose of UCB0599 180 mg capsule (Treatment A) under fasting conditions on Day 6 in Period 2 (normal gastric pH) and Day 24 in Period 5 (elevated gastric pH), further followed by a single dose of UCB0599 180 mg non-encapsulated tablet (Treatment B) under fasting conditions on Day 11 in Period 3 (normal gastric pH) and Day 29 in Period 6 (elevated gastric pH). In Periods 4, 5, and 6 (elevated gastric pH), esomeprazole 40 mg was coadministered once daily from Day 14 to Day 33. Each treatment period was followed by a 4-day Washout period.
7
Part A: Treatment Sequence: CBA
Participants received a single dose of UCB0599 180 mg encapsulated tablet (Treatment C) under fasting conditions on Day 1 in Period 1 (normal gastric pH) and Day 19 in Period 4 (elevated gastric pH), followed by a single dose of UCB0599 180 mg non-encapsulated tablet (Treatment B) under fasting conditions on Day 6 in Period 2 (normal gastric pH) and Day 24 in Period 5 (elevated gastric pH), further followed by a single dose of UCB0599 180 mg capsule (Treatment A) under fasting conditions on Day 11 in Period 3 (normal gastric pH) and Day 29 in Period 6 (elevated gastric pH). In Periods 4, 5, and 6 (elevated gastric pH), esomeprazole 40 mg was coadministered once daily from Day 14 to Day 33. Each treatment period was followed by a 4-day Washout period.
7
Part B: Treatment Sequence: Pooled Placebo
Participants received UCB0599 matching placebo, 90 mg capsule, on Day 1 in Period 1 followed by UCB0599 matching placebo, 180 mg capsule, on Day 6 in Period 2; received UCB0599 matching placebo, 180 mg capsule, on Day 1 in Period 1 followed by UCB0599 matching placebo, 360 mg capsule, on Day 6 in Period 2; and UCB0599 matching placebo, 360 mg capsule, on Day 1 in Period 1 followed by UCB0599 matching placebo, 90 mg capsule, on Day 6 in Period 2. Arm sequences were pooled for placebo in Part B.
6
Part B: Treatment Sequence: UCB0599 90mg/UCB0599 180 mg
received a single dose of UCB0599 90 mg capsule on Day 1 in Period 1 followed by a single dose of UCB0599 180 mg capsule on Day 6 in Period 2 under fasting conditions. Periods 1 and 2 were separated by a wash out period of 4 days.
8
Part B: Treatment Sequence: UCB0599 180 mg/ UCB0599 360 mg
Participants received a single dose of UCB0599 180 mg capsule on Day 1 in Period 1 followed by a single dose of UCB0599 360 mg capsule on Day 6 in Period 2 under fasting conditions. Periods 1 and 2 were separated by a wash out period of 4 days.
9
Part B: Treatment Sequence: UCB0599 360mg/ UCB0599 90mg
Participants received UCB0599 360 mg capsule, on Day 1 in Period 1 followed by UCB0599 90 mg capsule, on Day 6 in Period 2.
8
Total73

Withdrawals & dropouts

PeriodReasonFG000FG001FG002FG003FG004FG005FG006FG007FG008FG009FG010FG011
Part A: P5 (Day 24,Elevated Gastric pH)Consent Withdrawn (not due to adverse event)001000000000
Part B- Period 1 (Day 1)Adverse Event000000000100

Baseline characteristics

CharacteristicPart A: Treatment Sequence: ACBPart A: Treatment Sequence: BCAPart A: Treatment Sequence: BACPart A: Treatment Sequence: CABPart A: Treatment Sequence: CBAPart A: Treatment Sequence: ABCPart B: Treatment Sequence: Pooled PlaceboPart B: Treatment Sequence: UCB0599 90mg/UCB0599 180 mgPart B: Treatment Sequence: UCB0599 180 mg/ UCB0599 360 mgPart B: Treatment Sequence: UCB0599 360mg/ UCB0599 90mgTotal
Age, Categorical
<=18 years
0 Participants0 Participants0 Participants0 Participants0 Participants0 Participants0 Participants0 Participants0 Participants0 Participants0 Participants
Age, Categorical
>=65 years
0 Participants0 Participants0 Participants0 Participants0 Participants0 Participants0 Participants0 Participants0 Participants0 Participants0 Participants
Age, Categorical
Between 18 and 65 years
7 Participants7 Participants7 Participants7 Participants7 Participants7 Participants6 Participants8 Participants9 Participants8 Participants73 Participants
Age, Continuous42.6 years
STANDARD_DEVIATION 7.4
37.0 years
STANDARD_DEVIATION 10.9
30.9 years
STANDARD_DEVIATION 5.5
33.1 years
STANDARD_DEVIATION 8.8
31.9 years
STANDARD_DEVIATION 8.7
36.1 years
STANDARD_DEVIATION 7.1
39.5 years
STANDARD_DEVIATION 9.8
39.3 years
STANDARD_DEVIATION 7.9
30.7 years
STANDARD_DEVIATION 6.5
40.1 years
STANDARD_DEVIATION 9
36.0 years
STANDARD_DEVIATION 8.7
Race/Ethnicity, Customized
Asian
0 Participants0 Participants0 Participants0 Participants0 Participants0 Participants6 Participants8 Participants9 Participants8 Participants31 Participants
Race/Ethnicity, Customized
Black
1 Participants1 Participants5 Participants1 Participants2 Participants3 Participants0 Participants0 Participants0 Participants0 Participants13 Participants
Race/Ethnicity, Customized
Hispanic or Latino
3 Participants3 Participants1 Participants3 Participants3 Participants3 Participants0 Participants0 Participants0 Participants0 Participants16 Participants
Race/Ethnicity, Customized
Native Hawaiian or other Pacific Islander
0 Participants0 Participants0 Participants0 Participants0 Participants0 Participants0 Participants0 Participants0 Participants0 Participants0 Participants
Race/Ethnicity, Customized
Not Hispanic or Latino
4 Participants4 Participants6 Participants4 Participants4 Participants4 Participants6 Participants8 Participants9 Participants8 Participants57 Participants
Race/Ethnicity, Customized
Other or Mixed
0 Participants0 Participants0 Participants1 Participants0 Participants0 Participants0 Participants0 Participants0 Participants0 Participants1 Participants
Race/Ethnicity, Customized
White
6 Participants6 Participants2 Participants5 Participants5 Participants4 Participants0 Participants0 Participants0 Participants0 Participants28 Participants
Sex: Female, Male
Female
6 Participants3 Participants1 Participants3 Participants4 Participants4 Participants1 Participants2 Participants1 Participants2 Participants27 Participants
Sex: Female, Male
Male
1 Participants4 Participants6 Participants4 Participants3 Participants3 Participants5 Participants6 Participants8 Participants6 Participants46 Participants

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
EG002
affected / at risk
EG003
affected / at risk
EG004
affected / at risk
EG005
affected / at risk
EG006
affected / at risk
EG007
affected / at risk
EG008
affected / at risk
EG009
affected / at risk
EG010
affected / at risk
deaths
Total, all-cause mortality
0 / 420 / 420 / 420 / 30 / 80 / 80 / 80 / 30 / 80 / 90 / 8
other
Total, other adverse events
5 / 4211 / 426 / 421 / 32 / 80 / 80 / 81 / 31 / 83 / 92 / 8
serious
Total, serious adverse events
0 / 420 / 420 / 420 / 30 / 80 / 80 / 80 / 30 / 80 / 90 / 8

Outcome results

Primary

Area Under the Plasma Concentration-time Curve From Time 0 to Infinity (AUC Inf) of UCB0599 in Part A

AUC inf was area under the plasma concentration-time curve from time 0 to infinity of UCB0599 under normal and elevated gastric pH condition.

Time frame: Predose and at 0.25, 0.5, 1, 1.5, 2, 4, 8, 12, 24, 36, 48, 72, and 96 hours after UCB0599 administration on Days 1, 6, 11, 19, 24 and 29 in Part A

Population: PKS A included all randomized participants who received at least 1 total dose of study medication and have at least 1 observable PK measurement. Here, overall number of participants analyzed signifies participants who were evaluable for this outcome measure and number analyzed signifies participants who were evaluable for specified categories.

ArmMeasureGroupValue (GEOMETRIC_MEAN)Dispersion
Part A: UCB0599: Capsule 180 mgArea Under the Plasma Concentration-time Curve From Time 0 to Infinity (AUC Inf) of UCB0599 in Part ANormal5829 h*ng/mLGeometric Coefficient of Variation 36.8
Part A: UCB0599: Capsule 180 mgArea Under the Plasma Concentration-time Curve From Time 0 to Infinity (AUC Inf) of UCB0599 in Part AElevated5538 h*ng/mLGeometric Coefficient of Variation 49.5
Part A: UCB0599: Non-encapsulated Tablet 180 mgArea Under the Plasma Concentration-time Curve From Time 0 to Infinity (AUC Inf) of UCB0599 in Part ANormal5561 h*ng/mLGeometric Coefficient of Variation 42.3
Part A: UCB0599: Non-encapsulated Tablet 180 mgArea Under the Plasma Concentration-time Curve From Time 0 to Infinity (AUC Inf) of UCB0599 in Part AElevated5835 h*ng/mLGeometric Coefficient of Variation 44.9
Part A: UCB0599: Encapsulated Tablet 180 mgArea Under the Plasma Concentration-time Curve From Time 0 to Infinity (AUC Inf) of UCB0599 in Part ANormal5374 h*ng/mLGeometric Coefficient of Variation 44.5
Part A: UCB0599: Encapsulated Tablet 180 mgArea Under the Plasma Concentration-time Curve From Time 0 to Infinity (AUC Inf) of UCB0599 in Part AElevated5720 h*ng/mLGeometric Coefficient of Variation 41.4
Comparison: For Normal gastric pH90% CI: [0.9011, 1.006]
Comparison: For Normal gastric pH90% CI: [0.8762, 0.9777]
Comparison: For Normal gastric pH90% CI: [0.9204, 1.027]
Comparison: For Elevated gastric pH90% CI: [0.994, 1.116]
Comparison: For Elevated gastric pH90% CI: [0.971, 1.086]
Comparison: For Elevated gastric pH90% CI: [0.9208, 1.032]
Primary

Area Under the Plasma Concentration-time Curve From Time 0 to Infinity (AUC (Inf)) of UCB0599 in Part B

AUC inf was area under the plasma concentration-time curve from time 0 to infinity of UCB0599.

Time frame: Predose and at 0.25, 0.5, 1, 1.5, 2, 4, 8, 12, 24, 36, 48, 72, and 96 hours after UCB0599 administration on Days 1, and 6 in Part B

Population: The PKS B included randomized participants who received at least 1 total dose of study medication and have at least 1 observable PK measurement. Here, overall number of participants analyzed signifies participants who were evaluable for this outcome measure.

ArmMeasureValue (GEOMETRIC_MEAN)Dispersion
Part A: UCB0599: Capsule 180 mgArea Under the Plasma Concentration-time Curve From Time 0 to Infinity (AUC (Inf)) of UCB0599 in Part B3425 h*ng/mLGeometric Coefficient of Variation 29.6
Part A: UCB0599: Non-encapsulated Tablet 180 mgArea Under the Plasma Concentration-time Curve From Time 0 to Infinity (AUC (Inf)) of UCB0599 in Part B5151 h*ng/mLGeometric Coefficient of Variation 27.5
Part A: UCB0599: Encapsulated Tablet 180 mgArea Under the Plasma Concentration-time Curve From Time 0 to Infinity (AUC (Inf)) of UCB0599 in Part B12100 h*ng/mLGeometric Coefficient of Variation 36.7
Part B: UCB0599 360 mg (Japanese Participants)Area Under the Plasma Concentration-time Curve From Time 0 to Infinity (AUC (Inf)) of UCB0599 in Part B3847 h*ng/mLGeometric Coefficient of Variation 23.2
Part B: Pooled Placebo (Chinese Participants)Area Under the Plasma Concentration-time Curve From Time 0 to Infinity (AUC (Inf)) of UCB0599 in Part B6741 h*ng/mLGeometric Coefficient of Variation 28.5
Part B: UCB0599 90 mg (Chinese Participants)Area Under the Plasma Concentration-time Curve From Time 0 to Infinity (AUC (Inf)) of UCB0599 in Part B14070 h*ng/mLGeometric Coefficient of Variation 25.1
Primary

Area Under the Plasma Concentration-time Curve From Time 0 to the Last Quantifiable Concentration (AUC(0-t)) of UCB0599 in Part A

AUC(0-t) was area under the plasma concentration-time curve from time 0 to the last quantifiable concentration of UCB0599 under normal and elevated gastric pH condition.

Time frame: Predose and at 0.25, 0.5, 1, 1.5, 2, 4, 8, 12, 24, 36, 48, 72, and 96 hours after UCB0599 administration on Days 1, 6, 11, 19, 24 and 29 in Part A

Population: PKS A included all randomized participants who received at least 1 total dose of study medication and have at least 1 observable PK measurement. Here, number analyzed signifies participants who were evaluable for specified categories.

ArmMeasureGroupValue (GEOMETRIC_MEAN)Dispersion
Part A: UCB0599: Capsule 180 mgArea Under the Plasma Concentration-time Curve From Time 0 to the Last Quantifiable Concentration (AUC(0-t)) of UCB0599 in Part ANormal5774 hour nanograms per milliliter (h*ng/mL)Geometric Coefficient of Variation 35.5
Part A: UCB0599: Capsule 180 mgArea Under the Plasma Concentration-time Curve From Time 0 to the Last Quantifiable Concentration (AUC(0-t)) of UCB0599 in Part AElevated5489 hour nanograms per milliliter (h*ng/mL)Geometric Coefficient of Variation 49.2
Part A: UCB0599: Non-encapsulated Tablet 180 mgArea Under the Plasma Concentration-time Curve From Time 0 to the Last Quantifiable Concentration (AUC(0-t)) of UCB0599 in Part ANormal5503 hour nanograms per milliliter (h*ng/mL)Geometric Coefficient of Variation 41
Part A: UCB0599: Non-encapsulated Tablet 180 mgArea Under the Plasma Concentration-time Curve From Time 0 to the Last Quantifiable Concentration (AUC(0-t)) of UCB0599 in Part AElevated5779 hour nanograms per milliliter (h*ng/mL)Geometric Coefficient of Variation 43.9
Part A: UCB0599: Encapsulated Tablet 180 mgArea Under the Plasma Concentration-time Curve From Time 0 to the Last Quantifiable Concentration (AUC(0-t)) of UCB0599 in Part ANormal5324 hour nanograms per milliliter (h*ng/mL)Geometric Coefficient of Variation 43.1
Part A: UCB0599: Encapsulated Tablet 180 mgArea Under the Plasma Concentration-time Curve From Time 0 to the Last Quantifiable Concentration (AUC(0-t)) of UCB0599 in Part AElevated5641 hour nanograms per milliliter (h*ng/mL)Geometric Coefficient of Variation 41.3
Comparison: For Normal gastric pH90% CI: [0.9052, 1.003]
Comparison: For Normal gastric pH90% CI: [0.8758, 0.9706]
Comparison: For Normal gastric pH90% CI: [0.9191, 1.019]
Comparison: For Elevated gastric pH90% CI: [1.001, 1.12]
Comparison: For Elevated gastric pH90% CI: [0.9826, 1.097]
Comparison: For Elevated gastric pH90% CI: [0.9273, 1.037]
Primary

Area Under the Plasma Concentration-time Curve From Time 0 to the Last Quantifiable Concentration (AUC(0-t)) of UCB0599 in Part B

AUC(0-t) was area under the plasma concentration-time curve from time 0 to the last quantifiable concentration of UCB0599.

Time frame: Predose and at 0.25, 0.5, 1, 1.5, 2, 4, 8, 12, 24, 36, 48, 72, and 96 hours after UCB0599 administration on Days 1, and 6 in Part B

Population: The PKS B included randomized participants who received at least 1 total dose of study medication and have at least 1 observable PK measurement.

ArmMeasureValue (GEOMETRIC_MEAN)Dispersion
Part A: UCB0599: Capsule 180 mgArea Under the Plasma Concentration-time Curve From Time 0 to the Last Quantifiable Concentration (AUC(0-t)) of UCB0599 in Part B3363 h*ng/mLGeometric Coefficient of Variation 29.5
Part A: UCB0599: Non-encapsulated Tablet 180 mgArea Under the Plasma Concentration-time Curve From Time 0 to the Last Quantifiable Concentration (AUC(0-t)) of UCB0599 in Part B5242 h*ng/mLGeometric Coefficient of Variation 23.6
Part A: UCB0599: Encapsulated Tablet 180 mgArea Under the Plasma Concentration-time Curve From Time 0 to the Last Quantifiable Concentration (AUC(0-t)) of UCB0599 in Part B12010 h*ng/mLGeometric Coefficient of Variation 36.5
Part B: UCB0599 360 mg (Japanese Participants)Area Under the Plasma Concentration-time Curve From Time 0 to the Last Quantifiable Concentration (AUC(0-t)) of UCB0599 in Part B3795 h*ng/mLGeometric Coefficient of Variation 23.5
Part B: Pooled Placebo (Chinese Participants)Area Under the Plasma Concentration-time Curve From Time 0 to the Last Quantifiable Concentration (AUC(0-t)) of UCB0599 in Part B6689 h*ng/mLGeometric Coefficient of Variation 28.6
Part B: UCB0599 90 mg (Chinese Participants)Area Under the Plasma Concentration-time Curve From Time 0 to the Last Quantifiable Concentration (AUC(0-t)) of UCB0599 in Part B14020 h*ng/mLGeometric Coefficient of Variation 25.2
Primary

Maximum Plasma Concentration (Cmax) of UCB0599 in Part A

Cmax was maximum (peak) observed drug concentration following a single dose administration of UCB0599 under normal and elevated gastric pH condition.

Time frame: Predose and at 0.25, 0.5, 1, 1.5, 2, 4, 8, 12, 24, 36, 48, 72, and 96 hours after UCB0599 administration on Days 1, 6, 11, 19, 24 and 29 in Part A

Population: Pharmacokinetic Set Part A (PKS A) included all randomized participants who received at least 1 total dose of study medication and have at least 1 observable PK measurement. Here, number analyzed signifies participants who were evaluable for specified categories.

ArmMeasureGroupValue (GEOMETRIC_MEAN)Dispersion
Part A: UCB0599: Capsule 180 mgMaximum Plasma Concentration (Cmax) of UCB0599 in Part ANormal876.2 nanograms per milliliter (ng/mL)Geometric Coefficient of Variation 30.2
Part A: UCB0599: Capsule 180 mgMaximum Plasma Concentration (Cmax) of UCB0599 in Part AElevated449.3 nanograms per milliliter (ng/mL)Geometric Coefficient of Variation 54.9
Part A: UCB0599: Non-encapsulated Tablet 180 mgMaximum Plasma Concentration (Cmax) of UCB0599 in Part ANormal724.6 nanograms per milliliter (ng/mL)Geometric Coefficient of Variation 39.4
Part A: UCB0599: Non-encapsulated Tablet 180 mgMaximum Plasma Concentration (Cmax) of UCB0599 in Part AElevated694.4 nanograms per milliliter (ng/mL)Geometric Coefficient of Variation 43.8
Part A: UCB0599: Encapsulated Tablet 180 mgMaximum Plasma Concentration (Cmax) of UCB0599 in Part ANormal618.0 nanograms per milliliter (ng/mL)Geometric Coefficient of Variation 38.2
Part A: UCB0599: Encapsulated Tablet 180 mgMaximum Plasma Concentration (Cmax) of UCB0599 in Part AElevated631.4 nanograms per milliliter (ng/mL)Geometric Coefficient of Variation 42.8
Comparison: For normal gastric pH90% CI: [0.7535, 0.9076]
Comparison: For Normal gastric pH90% CI: [0.6427, 0.7741]
Comparison: For Normal gastric pH90% CI: [0.7771, 0.9361]
Comparison: For Elevated gastric pH90% CI: [1.376, 1.776]
Comparison: For Elevated gastric pH90% CI: [1.248, 1.604]
Comparison: For Elevated gastric pH90% CI: [0.7972, 1.027]
Primary

Maximum Plasma Concentration (Cmax) of UCB0599 in Part B

Cmax was maximum (peak) observed drug concentration following a single dose administration of UCB0599.

Time frame: Predose and at 0.25, 0.5, 1, 1.5, 2, 4, 8, 12, 24, 36, 48, 72, and 96 hours after UCB0599 administration on Days 1, and 6 in Part B

Population: Pharmacokinetic Set Part B (PKS B) included randomized participants who received at least 1 total dose of study medication and have at least 1 observable PK measurement.

ArmMeasureValue (GEOMETRIC_MEAN)Dispersion
Part A: UCB0599: Capsule 180 mgMaximum Plasma Concentration (Cmax) of UCB0599 in Part B502.5 ng/mLGeometric Coefficient of Variation 29.8
Part A: UCB0599: Non-encapsulated Tablet 180 mgMaximum Plasma Concentration (Cmax) of UCB0599 in Part B602.9 ng/mLGeometric Coefficient of Variation 42.4
Part A: UCB0599: Encapsulated Tablet 180 mgMaximum Plasma Concentration (Cmax) of UCB0599 in Part B1757 ng/mLGeometric Coefficient of Variation 36.4
Part B: UCB0599 360 mg (Japanese Participants)Maximum Plasma Concentration (Cmax) of UCB0599 in Part B483.2 ng/mLGeometric Coefficient of Variation 42.6
Part B: Pooled Placebo (Chinese Participants)Maximum Plasma Concentration (Cmax) of UCB0599 in Part B737.5 ng/mLGeometric Coefficient of Variation 35.7
Part B: UCB0599 90 mg (Chinese Participants)Maximum Plasma Concentration (Cmax) of UCB0599 in Part B1525 ng/mLGeometric Coefficient of Variation 24.8
Primary

Percentage of Study Participants With Serious Treatment-emergent Adverse Events (Serious TEAEs) in Part B

Serious TEAEs were any untoward medical incidence in a participant during administered study treatment, whether or not these events were related to study treatment and additionally were emergent untoward medical occurrence that at any dose: 1. Results in death 2. Is life-threatening 3. Required in patient hospitalisation or prolongation of existing hospitalisation 4. Results in persistent disability/incapacity 5. Was a congenital anomaly or birth defect 6. Important medical events

Time frame: From Baseline (Day 1) to Safety Follow-up Period of Part B (up to Day 15)

Population: SS B included all study participants who were randomized and received full or partial study medication according to the treatment that the participants actually received.

ArmMeasureValue (NUMBER)
Part A: UCB0599: Capsule 180 mgPercentage of Study Participants With Serious Treatment-emergent Adverse Events (Serious TEAEs) in Part B0 percentage of participants
Part A: UCB0599: Non-encapsulated Tablet 180 mgPercentage of Study Participants With Serious Treatment-emergent Adverse Events (Serious TEAEs) in Part B0 percentage of participants
Part A: UCB0599: Encapsulated Tablet 180 mgPercentage of Study Participants With Serious Treatment-emergent Adverse Events (Serious TEAEs) in Part B0 percentage of participants
Part B: UCB0599 360 mg (Japanese Participants)Percentage of Study Participants With Serious Treatment-emergent Adverse Events (Serious TEAEs) in Part B0 percentage of participants
Part B: Pooled Placebo (Chinese Participants)Percentage of Study Participants With Serious Treatment-emergent Adverse Events (Serious TEAEs) in Part B0 percentage of participants
Part B: UCB0599 90 mg (Chinese Participants)Percentage of Study Participants With Serious Treatment-emergent Adverse Events (Serious TEAEs) in Part B0 percentage of participants
Part B: UCB0599 180 mg (Chinese Participants)Percentage of Study Participants With Serious Treatment-emergent Adverse Events (Serious TEAEs) in Part B0 percentage of participants
Part B: UCB0599 360 mg (Chinese Participants)Percentage of Study Participants With Serious Treatment-emergent Adverse Events (Serious TEAEs) in Part B0 percentage of participants
Primary

Percentage of Study Participants With Treatment-emergent Adverse Events (TEAEs) in Part B

An AE was any untoward medical occurrence in a patient or clinical study participant, temporally associated with the use of study medication, whether or not considered related to the study medication. A TEAE was defined as AEs starting on/after the date/time of first treatment & upto including 4 days after last treatment or any unresolved event already present before administration of treatment that worsens in intensity following exposure to treatment.

Time frame: From Baseline (Day 1) to Safety Follow-up Period of Part B (up to Day 15)

Population: Safety Set Part B (SS B) included all study participants who were randomized and received full or partial study medication according to the treatment that the participants actually received.

ArmMeasureValue (NUMBER)
Part A: UCB0599: Capsule 180 mgPercentage of Study Participants With Treatment-emergent Adverse Events (TEAEs) in Part B33.3 percentage of participants
Part A: UCB0599: Non-encapsulated Tablet 180 mgPercentage of Study Participants With Treatment-emergent Adverse Events (TEAEs) in Part B25.0 percentage of participants
Part A: UCB0599: Encapsulated Tablet 180 mgPercentage of Study Participants With Treatment-emergent Adverse Events (TEAEs) in Part B0 percentage of participants
Part B: UCB0599 360 mg (Japanese Participants)Percentage of Study Participants With Treatment-emergent Adverse Events (TEAEs) in Part B0 percentage of participants
Part B: Pooled Placebo (Chinese Participants)Percentage of Study Participants With Treatment-emergent Adverse Events (TEAEs) in Part B33.3 percentage of participants
Part B: UCB0599 90 mg (Chinese Participants)Percentage of Study Participants With Treatment-emergent Adverse Events (TEAEs) in Part B12.5 percentage of participants
Part B: UCB0599 180 mg (Chinese Participants)Percentage of Study Participants With Treatment-emergent Adverse Events (TEAEs) in Part B33.3 percentage of participants
Part B: UCB0599 360 mg (Chinese Participants)Percentage of Study Participants With Treatment-emergent Adverse Events (TEAEs) in Part B25.0 percentage of participants
Primary

Percentage of Study Participants With Treatment-emergent Adverse Events (TEAEs) Leading to Withdrawal From Study in Part B

: An AE was any untoward medical occurrence in a patient or clinical study participant, temporally associated with the use of study medication, whether or not considered related to the study medication. A TEAE was defined as AEs starting on/after the date/time of first treatment & upto including 4 days after last treatment or any unresolved event already present before administration of treatment that worsens in intensity following exposure to treatment.

Time frame: From Baseline (Day 1) to Safety Follow-up Period of Part B (up to Day 15)

Population: SS B included all study participants who were randomized and received full or partial study medication according to the treatment that the participants actually received.

ArmMeasureValue (NUMBER)
Part A: UCB0599: Capsule 180 mgPercentage of Study Participants With Treatment-emergent Adverse Events (TEAEs) Leading to Withdrawal From Study in Part B0 percentage of participants
Part A: UCB0599: Non-encapsulated Tablet 180 mgPercentage of Study Participants With Treatment-emergent Adverse Events (TEAEs) Leading to Withdrawal From Study in Part B0 percentage of participants
Part A: UCB0599: Encapsulated Tablet 180 mgPercentage of Study Participants With Treatment-emergent Adverse Events (TEAEs) Leading to Withdrawal From Study in Part B0 percentage of participants
Part B: UCB0599 360 mg (Japanese Participants)Percentage of Study Participants With Treatment-emergent Adverse Events (TEAEs) Leading to Withdrawal From Study in Part B0 percentage of participants
Part B: Pooled Placebo (Chinese Participants)Percentage of Study Participants With Treatment-emergent Adverse Events (TEAEs) Leading to Withdrawal From Study in Part B0 percentage of participants
Part B: UCB0599 90 mg (Chinese Participants)Percentage of Study Participants With Treatment-emergent Adverse Events (TEAEs) Leading to Withdrawal From Study in Part B0 percentage of participants
Part B: UCB0599 180 mg (Chinese Participants)Percentage of Study Participants With Treatment-emergent Adverse Events (TEAEs) Leading to Withdrawal From Study in Part B0 percentage of participants
Part B: UCB0599 360 mg (Chinese Participants)Percentage of Study Participants With Treatment-emergent Adverse Events (TEAEs) Leading to Withdrawal From Study in Part B0 percentage of participants
Secondary

Percentage of Study Participants With Serious Treatment-emergent Adverse Events (TEAEs) in Part A

Serious TEAEs were any untoward medical incidence in a participant during administered study treatment, whether or not these events were related to study treatment and additionally were emergent untoward medical occurrence that at any dose: 1. Results in death 2. Is life-threatening 3. Required in patient hospitalisation or prolongation of existing hospitalisation 4. Results in persistent disability/incapacity 5. Was a congenital anomaly or birth defect 6. Important medical events

Time frame: From Baseline (Day 1) to Safety Follow-up Period of Part A (up to Day 39)

Population: SS A included all study participants who were randomized and received full or partial study medication according to the treatment that the participants actually received.

ArmMeasureValue (NUMBER)
Part A: UCB0599: Capsule 180 mgPercentage of Study Participants With Serious Treatment-emergent Adverse Events (TEAEs) in Part A0 percentage of participants
Part A: UCB0599: Non-encapsulated Tablet 180 mgPercentage of Study Participants With Serious Treatment-emergent Adverse Events (TEAEs) in Part A0 percentage of participants
Part A: UCB0599: Encapsulated Tablet 180 mgPercentage of Study Participants With Serious Treatment-emergent Adverse Events (TEAEs) in Part A0 percentage of participants
Secondary

Percentage of Study Participants With Treatment-emergent Adverse Events (TEAEs) in Part A

An AE was any untoward medical occurrence in a patient or clinical study participant, temporally associated with the use of study medication, whether or not considered related to the study medication. A TEAE was defined as AEs starting on/after the date/time of first treatment & upto including 4 days after last treatment or any unresolved event already present before administration of treatment that worsens in intensity following exposure to treatment.

Time frame: From Baseline (Day 1) to Safety Follow-up Period of Part A (up to Day 39)

Population: Safety Set Part A (SS A) included all study participants who were randomized and received full or partial study medication according to the treatment that the participants actually received.

ArmMeasureValue (NUMBER)
Part A: UCB0599: Capsule 180 mgPercentage of Study Participants With Treatment-emergent Adverse Events (TEAEs) in Part A38.1 percentage of participants
Part A: UCB0599: Non-encapsulated Tablet 180 mgPercentage of Study Participants With Treatment-emergent Adverse Events (TEAEs) in Part A31.0 percentage of participants
Part A: UCB0599: Encapsulated Tablet 180 mgPercentage of Study Participants With Treatment-emergent Adverse Events (TEAEs) in Part A35.7 percentage of participants
Secondary

Percentage of Study Participants With Treatment-emergent Adverse Events (TEAEs) Leading to Withdrawal From Study in Part A

Time frame: From Baseline (Day 1) to Safety Follow-up Period of Part A (up to Day 39)

Population: SS A included all study participants who were randomized and received full or partial study medication according to the treatment that the participants actually received.

ArmMeasureValue (NUMBER)
Part A: UCB0599: Capsule 180 mgPercentage of Study Participants With Treatment-emergent Adverse Events (TEAEs) Leading to Withdrawal From Study in Part A0 percentage of participants
Part A: UCB0599: Non-encapsulated Tablet 180 mgPercentage of Study Participants With Treatment-emergent Adverse Events (TEAEs) Leading to Withdrawal From Study in Part A0 percentage of participants
Part A: UCB0599: Encapsulated Tablet 180 mgPercentage of Study Participants With Treatment-emergent Adverse Events (TEAEs) Leading to Withdrawal From Study in Part A0 percentage of participants

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