Study of GSK3511294 in Healthy Chinese Participants

An Open-label, Single Dose Study to Investigate the Pharmacokinetics, Safety, Tolerability and Immunogenicity of Two Dose Levels of GSK3511294 Administered Subcutaneously in Chinese Healthy Participants

This single dose pharmacokinetic (PK) study aims to investigate the PK, safety, tolerability and immunogenicity of two dose levels of GSK3511294 administered subcutaneously in Chinese healthy participants

Study Overview

• Status: Completed
• Conditions: Asthma
• Intervention / Treatment: Biological: Depemokimab

• Study Type: Interventional
• Enrollment (Actual): 20
• Phase: Phase 1

Contacts and Locations

Study Locations

• China
  • Hangzhou, China, 310006
    • GSK Investigational Site

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years to 45 years (Adult)
• Accepts Healthy Volunteers: Yes

Description

Inclusion Criteria:

• Participant between 18 to 45 years of age.
• Participants who are overtly healthy as determined by medical evaluation including medical history, physical examination, laboratory tests, electrocardiograms and vital signs.
• Body weight greater than or equal to (>=)50.0 kilograms (kg) for males, >=45.0 kg for females, and body mass index (BMI) within the range (19.0-26.0) kg/meter square (m^2) (inclusive).
• Contraceptive use by men and/or women should be consistent with local regulations regarding the methods of contraception for those participating in clinical studies.
• Capable of giving signed informed consent.

Exclusion Criteria:

• Participant is pregnant, breastfeeding, or a woman of childbearing potential
• History or presence of cardiovascular, respiratory, hepatic, renal, gastrointestinal, endocrine, hematological, or neurological disorders capable of significantly altering the absorption, metabolism, or elimination of drugs
• Participants with allergy/intolerance to a monoclonal antibody or biologic or participants with a previous history of clinically significant multiple or severe allergic reactions/intolerance
• Current evidence or recent history of an infective illness
• A positive pre-study drug/alcohol screen or a history (or suspected history) of alcohol misuse or substance abuse
• Clinically significant abnormalities
• Participants with Coronavirus Disease-2019 (COVID-19)
• With prior/concurrent clinical study experience.

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: Non-Randomized
• Interventional Model: Sequential Assignment
• Masking: None (Open Label)

Number of Arms

2

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: Depemokimab 100mg; Healthy Chinese participants received a single dose of 100 mg Depemokimab subcutaneously on Day 1.	Biological: Depemokimab; Depemokimab was administered.; Other Names: GSK3511294
Experimental: Depemokimab 300mg; Healthy Chinese participants received a single dose of 300 mg Depemokimab subcutaneously on Day 1.	Biological: Depemokimab; Depemokimab was administered.; Other Names: GSK3511294

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Area Under the Plasma Concentration-Time Curve (AUC) From Time Zero (Pre-Dose) Extrapolated to Infinite Time (AUC[0-Infinity]) of Depemokimab	Blood samples were collected from participants at indicated time points and analyzed for AUC(0-Infinity). Pharmacokinetic parameters were calculated by standard non compartmental analysis. As the first dose of depemokimab was administered on Day 1, Week 26 post-dose correlates to Day 1 plus 182 days, that is, Day 183.	Day 1 (Pre-dose, 2h, and 8h Post-dose), Day 2, Day 3, Day 5, Day 8, Day 15, Day 29, Day 57, Day 85, Day 127, Day 169, and Day 183
AUC From Time 0 (Pre-Dose) to Last Time of Quantifiable Concentration Within a Participant Across All Treatments (AUC[0-T]) of Depemokimab	Blood samples were collected from participants at indicated time points and analyzed for AUC(0-T). Pharmacokinetic parameters were calculated by standard non compartmental analysis. As the first dose of depemokimab was administered on Day 1, Week 26 post-dose correlates to Day 1 plus 182 days, that is, Day 183.	Day 1 (Pre-dose, 2h, and 8h Post-dose), Day 2, Day 3, Day 5, Day 8, Day 15, Day 29, Day 57, Day 85, Day 127, Day 169, and Day 183
AUC From Time 0 (Pre-dose) to Week 4 (AUC[0-Week 4]) of Depemokimab	Blood samples were collected from participants at indicated time points and analyzed for AUC(0-Week 4). Pharmacokinetic parameters were calculated by standard non compartmental analysis. As the first dose of depemokimab was administered on Day 1, Week 4 post-dose correlates to Day 1 plus 28 days, that is, Day 29.	Pre-dose (Day 1); 2 hours (h), 8 h, 24 h, and 48 h post-dose; Days 5, 8, 15, and 29
AUC From Time 0 (Pre-dose) To Week 12 (AUC[0-Week 12]) Of Depemokimab	Blood samples were collected from participants at indicated time points and analyzed for AUC(0-Week 12). Pharmacokinetic parameters were calculated by standard non compartmental analysis. As the first dose of depemokimab was administered on Day 1, Week 12 post-dose correlates to Day 1 plus 84 days, that is, Day 85.	Pre-dose (Day 1); 2 h, 8 h, 24 h, and 48 h post-dose; Days 5, 8, 15, 29, 57, and 85
AUC From Time 0 (Pre-dose) To Week 26 [AUC(0-Week 26)] of Depemokimab	Blood samples were collected from participants at indicated time points and analyzed for AUC(0-Week 26). Pharmacokinetic parameters were calculated by standard non compartmental analysis. As the first dose of depemokimab was administered on Day 1, Week 26 post-dose correlates to Day 1 plus 182 days, that is, Day 183.	Pre-dose (Day 1); 2 hours (h), 8 h, 24 h, and 48 h post-dose; Days 5, 8, 15, 29, 57, 85, 127, 169, and 183
Percentage Of AUC(0-Infinity) Obtained by Extrapolation (%AUCex) of Depemokimab	Blood samples were collected from participants at indicated time points and analyzed for percentage of AUC(0-Infinity) obtained by extrapolation. Pharmacokinetic parameters were calculated by standard non compartmental analysis. As the first dose of depemokimab was administered on Day 1, Week 26 post-dose correlates to Day 1 plus 182 days, that is, Day 183.	Pre-dose (Day 1); 2 hours (h), 8 h, 24 h, and 48 h post-dose; Days 5, 8, 15, 29, 57, 85, 127, 169, and 183
Maximum Observed Plasma Concentration (Cmax) of Depemokimab	Blood samples were collected from participants at indicated time points and analyzed for Cmax. Pharmacokinetic parameters were calculated by standard non compartmental analysis. As the first dose of depemokimab was administered on Day 1, Week 26 post-dose correlates to Day 1 plus 182 days, that is, Day 183.	Pre-dose (Day 1); 2 hours (h), 8 h, 24 h, and 48 h post-dose; Days 5, 8, 15, 29, 57, 85, 127, 169, and 183
Time of Occurrence of Cmax (Tmax) Of Depemokimab	Blood samples were collected from participants at indicated time points and analyzed for Tmax. Pharmacokinetic parameters were calculated by standard non compartmental analysis. Tmax was determined directly from the plasma concentration-time data. As the first dose of depemokimab was administered on Day 1, Week 26 post-dose correlates to Day 1 plus 182 days, that is, Day 183.	Pre-dose (Day 1); 2 hours (h), 8 h, 24 h, and 48 h post-dose; Days 5, 8, 15, 29, 57, 85, 127, 169, and 183
Time To Last Quantifiable Concentration (Tlast) of Depemokimab	Blood samples were collected from participants at indicated time points and analyzed for Tlast. Pharmacokinetic parameters were calculated by standard non compartmental analysis. As the first dose of depemokimab was administered on Day 1, Week 26 post-dose correlates to Day 1 plus 182 days, that is, Day 183.	Pre-dose (day 1); 2 hours (h), 8 h, 24 h, and 48 h post-dose; Days 5, 8, 15, 29, 57, 85, 127, 169, and 183
Apparent Clearance (CL/F) of Depemokimab	Blood samples were collected from participants at indicated time points and analyzed for Apparent Clearance. Pharmacokinetic parameters were calculated by standard non compartmental analysis. As the first dose of depemokimab was administered on Day 1, Week 26 post-dose correlates to Day 1 plus 182 days, that is, Day 183.	Pre-dose (Day 1); 2 hours (h), 8 h, 24 h, and 48 h post-dose; Days 5, 8, 15, 29, 57, 85, 127, 169, and 183
Apparent Volume of Distribution (Vz/F) of Depemokimab	Blood samples were collected from participants at indicated time points and analyzed for apparent volume of distribution. Pharmacokinetic parameters were calculated by standard non compartmental analysis. As the first dose of depemokimab was administered on Day 1, Week 26 post-dose correlates to Day 1 plus 182 days, that is, Day 183.	Pre-dose (Day 1); 2 hours (h), 8 h, 24 h, and 48 h post-dose; Days 5, 8, 15, 29, 57, 85, 127, 169, and 183
Terminal Elimination Rate Constant (Lambda Z) of Depemokimab	Blood samples were collected from participants at indicated time points and analyzed for Terminal elimination rate constant. Pharmacokinetic parameters were calculated by standard non compartmental analysis. As the first dose of depemokimab was administered on Day 1, Week 26 post-dose correlates to Day 1 plus 182 days, that is, Day 183.	Pre-dose (Day 1); 2 hours (h), 8 h, 24 h, and 48 h post-dose; Days 5, 8, 15, 29, 57, 85, 127, 169, and 183
Terminal Phase Half-Life (T1/2) of Depemokimab	Blood samples were collected from participants at indicated time points and analyzed for Terminal phase half-life. Pharmacokinetic parameters were calculated by standard non compartmental analysis. As the first dose of depemokimab was administered on Day 1, Week 26 post-dose correlates to Day 1 plus 182 days, that is, Day 183.	Pre-dose (Day 1); 2 hours (h), 8 h, 24 h, and 48 h post-dose; Days 5, 8, 15, 29, 57, 85, 127, 169, and 183

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Number of Participants With Adverse Events (AE) And Serious Adverse Events (SAEs)	An AE is any untoward medical occurrence in a clinical study participant, temporally associated with the use of a study intervention, whether or not considered related to the study intervention. An SAE is any untoward medical occurrence that results in death, is life-threatening, requires inpatient hospitalization or prolongation of existing hospitalization, results in persistent disability/incapacity, is a congenital anomaly/birth defect in the offspring of a study participant, or is considered or defined as an important medical event.	From the start of the study intervention (Day 1) up to Day 211 (End of follow-up)
Change From Baseline in Hematology Parameter: Basophils, Eosinophils, Lymphocytes, Monocytes, Neutrophils, Platelets, and Leukocytes	Blood samples were collected for the assessment of hematology parameters including (WBC) count with differential that is, Basophils, Eosinophils, Lymphocytes, Monocytes, Neutrophils, Platelets, and Leukocytes. Baseline was defined as latest pre-dose assessment with a non-missing value. Change from Baseline was defined as post-dose visit value minus Baseline value.	Baseline (Day -1), Days 2, 3, 5, Weeks 1, 2, 4, 8, 12, 18, 24 and Week 26
Change From Baseline in Hematology Parameter: Hemoglobin	Blood samples were collected for the assessment of change from baseline in hematology parameters including Hemoglobin. Baseline was defined as latest pre-dose assessment with a non-missing value. Change from Baseline was defined as post-dose visit value minus Baseline value.	Baseline (Day -1), Days 2, 3, 5, Weeks 1, 2, 4, 8, 12, 18, 24 and 26
Change From Baseline in Hematology Parameter: Hematocrit	Blood samples were collected for the assessment of change from baseline in hematology parameters including Hematocrit. Baseline was defined as latest pre-dose assessment with a non-missing value. Change from Baseline was defined as post-dose visit value minus Baseline value.	Baseline (Day -1), Days 2, 3, 5, Weeks 1, 2, 4, 8, 12, 18, 24 and 26
Change From Baseline in Hematology Parameter: Mean Corpuscular Volume (MCV)	Blood samples were collected for the assessment of change from baseline in hematology parameters including mean corpuscular volume. Baseline was defined as latest pre-dose assessment with a non-missing value. Change from Baseline was defined as post-dose visit value minus Baseline value.	Baseline (Day -1), Days 2, 3, 5, Weeks 1, 2, 4, 8, 12, 18, 24 and 26
Change From Baseline in Hematology Parameter: Mean Corpuscular Hemoglobin (MCH)	Blood samples were collected for the assessment of change from baseline in hematology parameters including mean Corpuscular Hemoglobin. Baseline was defined as latest pre-dose assessment with a non-missing value. Change from Baseline was defined as post-dose visit value minus Baseline value.	Baseline (Day -1), Days 2, 3, 5, Weeks 1, 2, 4, 8, 12, 18, 24 and 26
Change From Baseline in Hematology Parameter: Reticulocytes	Blood samples were collected for the assessment of change from baseline in hematology parameters including Reticulocytes. Baseline was defined as latest pre-dose assessment with a non-missing value. Change from Baseline was defined as post-dose visit value minus Baseline value.	Baseline (Day -1), Days 2, 3, 5, Weeks 1, 2, 4, 8, 12, 18, 24 and Week 26
Change From Baseline In Hematology Parameter: Erythrocytes	Change from baseline in hematology parameter including Erythrocytes. Baseline was defined as latest pre-dose assessment with a non-missing value. Change from Baseline was defined as post-dose visit value minus Baseline value.	Baseline (Day -1), Days 2, 3, 5, Weeks 1, 2, 4, 8, 12, 18, 24 and Week 26
Change From Baseline in Clinical Chemistry Parameters: Sodium, Potassium, Calcium, Glucose And Urea	Blood samples was collected for the assessment of clinical chemistry parameters including Sodium, potassium, calcium, glucose, and urea. Baseline was defined as latest pre-dose assessment with a non-missing value. Change from Baseline was defined as post-dose visit value minus Baseline value.	Baseline (Pre-dose on Day -1), Week 1, 4, 8, 12, 24 and Week 26
Change From Baseline in Clinical Chemistry Parameter: Direct Bilirubin, Bilirubin, and Creatinine	Blood samples was collected for the assessment of clinical chemistry parameters including direct bilirubin, bilirubin, and creatinine[MB10.1]. Baseline was defined as latest pre-dose assessment with a non-missing value. Change from Baseline was defined as post-dose visit value minus Baseline value.	Baseline (Day -1), Week 1, 4, 8, 12, 24 and Week 26
Change From Baseline in Clinical Chemistry Parameters: Alkaline Phosphate (ALP), Alanine Aminotransferase (ALT), Aspartate Aminotransferase (AST), and Gamma Glutamyl Transferase (GGT)	Blood samples was collected for the assessment of clinical chemistry parameters including AST, ALT, ALP, and GGT. Baseline was defined as latest pre-dose assessment with a non-missing value. Change from Baseline was defined as post-dose visit value minus Baseline value.	Baseline (Day -1), Week 1, 4, 8, 12, 24 and Week 26
Change From Baseline In Clinical Chemistry Parameter of Albumin and Total Protein	Blood samples was collected for the assessment of clinical chemistry parameters including Albumin. and Total Protein. Baseline was defined as latest pre-dose assessment with a non-missing value. Change from Baseline was defined as post-dose visit value minus Baseline value.	Baseline (Day -1), Week 1, 4, 8, 12, 24 and Week 26
Absolute Values of Complement C3 And C4 at Each Timepoint	Blood samples were collected at indicated timepoints for analysis for complement (C3 and C4). Baseline was defined as latest pre-dose assessment with a non-missing value.	Baseline (Day -1), Week 1, 4, 8, 12, 24 and Week 26
Ratio to Baseline at Each Timepoint of Complement C3 And C4	Blood samples were collected at indicated timepoints for analysis for complement (C3 and C4). Baseline was defined as latest pre-dose assessment with a non-missing value.	Baseline (Day -1), Week 1, 4, 8, 12, 24 and Week 26
Change From Baseline in Systolic and Diastolic Blood Pressure	Systolic blood pressure (sBP) is a measure of blood pressure while the heart is beating. Diastolic blood pressure (dBP) is a measure of blood pressure while the heart is relaxed. Baseline was defined as latest pre-dose assessment with a non-missing value. Change from Baseline was defined as post-dose visit value minus Baseline value.	Baseline (Day -1), Day 1 (2 hours), Day 1 (8 hours), Days 2, 3, 5, Weeks 1, 2, 4, 8, 12, 18, 24 and 26
Change From Baseline in Body Temperature	Body temperature was measured in participants in resting state. Baseline was defined as latest pre-dose assessment with a non-missing value. Change from Baseline was defined as post-dose visit value minus Baseline value.	Baseline (Day -1), Day 1 (2 hours), Day 1 (8 hours), Day 2, 3, 5, Week 1, 2, 4, 8, 12, 18, 24 and 26
Change From Baseline in Pulse Rate	The vital signs followed in this analysis was pulse rate, expressed as beats per minute (bpm). Baseline was defined as latest pre-dose assessment with a non-missing value. Change from Baseline was defined as post-dose visit value minus Baseline value.	Baseline (Day -1), Day 1 (2 hour), Day 1 (8 hour), Day 2, 3, 5, Week 1, 4, 8, 12, 18, 24 and Week 26
Change From Baseline in ECG Parameters: PR Interval, Aggregate, QRS Duration, Aggregate, QT Interval, Aggregate, QTcF Interval, Aggregate	12-lead ECG were performed in a supine position using an automated ECG machine that calculated the heart rate and measured PR interval, QRS duration, QT interval and corrected QT using Fridericia's Formula (QTc[MB13.1]F) intervals. ECG measurements were performed in triplicate. When multiple ECGs were performed at the same planned timepoint, the aggregate [MB14.1]value of each parameter was used. Baseline was defined as latest pre-dose assessment with a non-missing value. Change from Baseline was defined as post-dose visit value minus Baseline value.	Baseline (Day -1), Day 1 (2 hour), Day 1 (8 hour), Day 2, 3, 5, Week 1, 4, 8, 12, 18, 24 and Week 26
Number of Participants With Positive Anti-drug Antibodies (ADAs) Against Depemokimab	Serum samples were collected to determine the presence of anti-depemokimab binding antibodies using a validated bioanalytical method. Data is reported by visit. The results were categorized as negative and positive. A participant is considered positive if they have at least one positive post-Baseline ADA result. Number of participants with positive ADAs against depemokimab was reported in this outcome measure.	Day 1 (Pre-dose), Week 4, Week 12, and Week 26
Titres of Binding ADA's to Depemokimab	Serum samples were collected to determine the presence of anti-depemokimab binding antibodies using a validated bioanalytical method. Data is reported by visit. Titer was only measured when a positive result was found.	Up to Week 26

Collaborators and Investigators

• Sponsor: GlaxoSmithKline
• Investigators: Study Director: GSK Clinical Trials, GlaxoSmithKline

Study record dates

Study Major Dates

• Study Start (Actual): December 10, 2021
• Primary Completion (Actual): December 23, 2022
• Study Completion (Actual): December 23, 2022

Study Registration Dates

• First Submitted: November 22, 2021
• First Submitted That Met QC Criteria: November 22, 2021
• First Posted (Actual): December 1, 2021

Study Record Updates

• Last Update Posted (Actual): May 26, 2026
• Last Update Submitted That Met QC Criteria: May 22, 2026
• Last Verified: May 1, 2026

More Information

Terms related to this study

• Keywords: Immunogenicity; GSK3511294; Single dose study; Chinese healthy participants
• Additional Relevant MeSH Terms: Immune System Diseases; Respiratory Tract Diseases; Lung Diseases; Bronchial Diseases; Lung Diseases, Obstructive; Respiratory Hypersensitivity; Hypersensitivity, Immediate; Hypersensitivity; Asthma
• Other Study ID Numbers: 208021

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: YES
• IPD Plan Description: Study Sponsor will assess requests from qualified researchers for anonymized individual patient-level data and related study documents. Data sharing is subject to certain criteria, conditions, and exceptions. For further information, refer to https://d3l8i7lo48obsd.cloudfront.net/gsk-patient-level-data-sharing-july2025-1-Bgwa1UthxvluYbWYTThw.pdf
• IPD Sharing Time Frame: Anonymized IPD will be made available within 6 months of publication of primary, key secondary and safety results for studies in product with approved indication(s) or asset(s) with development terminated across all indications.
• IPD Sharing Access Criteria: Anonymized IPD is shared with researchers whose proposals are approved by an Independent Review Panel and after a Data Sharing Agreement is in place. Access is provided for an initial period of 12 months, but an extension may be granted, when justified, for up to 6 months.
• IPD Sharing Supporting Information Type: STUDY_PROTOCOL; SAP; ICF; CSR

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No