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GSK4771261

Phase 1

Kidney Disease | Small molecule | Nephrology |GSK plc|Trials Updated: Oct 5, 2026

GSK4771261 development status

Highest phase Phase 1
Registered trials 2 across 1 sponsor since Dec 2024

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindPLACEBO_CONTROLLED
Total Trials2
Total Enrollment116

FDA Designations

No designations recorded

GSK4771261 clinical trials

GSK4771261 · 2 trials · 1 indication

Phase 1 2
NCT07600450A Study of GSK4771261 in Healthy Participants Aged 25 to 55 Years of Age InclusiveKidney Disease
RECRUITING30 Analytics
NCT06734234A Study to Evaluate the Safety, Tolerability, and Effects on Blood and Urine Markers of Single Ascending Dose of GSK4771261 in Healthy Participants and Participants With Autosomal Dominant Polycystic Kidney DiseaseKidney Disease
ACTIVE NOT_RECRUITING86 Analytics
PHASE1RECRUITING
A Study of GSK4771261 in Healthy Participants Aged 25 to 55 Years of Age Inclusive
Kidney DiseaseUnlock trial analytics
PHASE1ACTIVE NOT_RECRUITING
A Study to Evaluate the Safety, Tolerability, and Effects on Blood and Urine Markers of Single Ascending Dose of GSK4771261 in Healthy Participants and Participants With Autosomal Dominant Polycystic Kidney Disease
Kidney DiseaseUnlock trial analytics

Study Endpoints

Primary Endpoints

Number of Participants with Adverse Events (AEs), Injection Site Reactions, and Serious AEs (SAEs)
Up to Week 13 (End of Study)
Number of Participants with Clinically Significant Changes from Baseline in Vital Signs
Up to Week 13 (End of Study)
Number of Participants with Clinically Significant Changes from Baseline in Clinical Laboratory Values
Up to Week 13 (End of Study)
Number of Participants with Clinically Significant Changes from Baseline in 12-Lead Electrocardiogram (ECG)
Up to Week 13 (End of Study)
Area under the concentration-time curve from time zero to the time of the last quantifiable concentration (AUC[0-t])
Up to Week 13
Area under the serum concentration-time curve extrapolated to infinite time (AUC[0-inf])
Up to Week 13
Maximum observed serum concentration (Cmax)
Up to Week 13
Part A: Number of Participants with Adverse events (AEs)
From Baseline (Day 1) up to Day 182 (End of study [EoS])

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.

Part B: Number of Participants with AEs
From Baseline (Day 1) up to Day 182 (EoS)

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.

Part A: Number of Participants with Serious Adverse Events (SAEs)
From Baseline (Day 1) up to Day 182 (EoS)

An SAE is defined as any untoward medical occurrence that, at any dose, meets one or more of the criteria: results in death; is life threatening, requires inpatient hospitalization or prolongation of existing hospitalization; results in persistent or significant disability/incapacity, is a congenital anomaly/birth defect in the offspring of a study participant; abnormal pregnancy outcome (for example, spontaneous abortion, fetal death, stillbirth, congenital anomalies, ectopic pregnancy); is a suspected transmission of any infectious agent via an authorized medicinal product; or other situations.

Part B: Number of Participants with SAEs
From Baseline (Day 1) up to Day 182 (EoS)

An SAE is defined as any untoward medical occurrence that, at any dose, meets one or more of the criteria: results in death; is life threatening, requires inpatient hospitalization or prolongation of existing hospitalization; results in persistent or significant disability/incapacity, is a congenital anomaly/birth defect in the offspring of a study participant; abnormal pregnancy outcome (for example, spontaneous abortion, fetal death, stillbirth, congenital anomalies, ectopic pregnancy); is a suspected transmission of any infectious agent via an authorized medicinal product; or other situations

Part A: Number of Participants with Clinically Significant Changes in Blood Laboratory Values
From Baseline (Day 1) up to Day 182 (EoS)

Number of participants with clinically significant changes in blood laboratory values will be evaluated.

Part B: Number of Participants with Clinically Significant Changes in Blood Laboratory Values
From Baseline (Day 1) up to Day 182 (EoS)

Number of participants with clinically significant changes in blood laboratory values will be evaluated.

Part A: Number of Participants with Clinically Significant Changes in Urine Laboratory Values
From Baseline (Day 1) up to Day 182 (EoS)

Number of participants with clinically significant changes in Urine laboratory values will be evaluated.

Part B: Number of Participants with Clinically Significant Changes in Urine Laboratory Values
From Baseline (Day 1) up to Day 182 (EoS)

Number of participants with clinically significant changes in Urine laboratory values will be evaluated.

Part A: Number of Participants with Clinically Significant Changes in Vital Signs
From Baseline (Day 1) up to Day 182 (EoS)

Number of participants with clinically significant changes in vital signs (will be evaluated.

Part B: Number of Participants with Clinically Significant Changes in Vital Signs
From Baseline (Day 1) up to Day 182 (EoS)

Number of participants with clinically significant changes in vital signs will be evaluated.

Part A: Number of Participants with Clinically Significant Changes in 12-lead Electrocardiogram (ECG)
From Baseline (Day 1) up to Day 182 (EoS)

Number of participants with clinically significant changes in 12-lead ECG parameters will be evaluated.

Part B: Number of Participants with Clinically Significant Changes in 12-lead ECG
From Baseline (Day 1) up to Day 182 (EoS)

Number of participants with clinically significant changes in 12-lead ECG parameters will be evaluated.

Secondary Endpoints

Number of Participants with pre-existing Anti-Drug Antibodies (ADAs)
Up to Week 13 (End of Study)
Number of Participants with treatment-emergent ADAs
Up to Week 13 (End of Study)
Part A: Number of Participants with Anti-drug Antibodies for GSK4771261
From Baseline (Day 1) up to Day 182 (EoS)
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Study Design & Arms

AllocationRANDOMIZED
MaskingDOUBLE
ModelPARALLEL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
GSK4771261EXPERIMENTALHealthy participants of Chinese, Japanese, or White/European ancestry will receive GSK4771261.
PlaceboEXPERIMENTALHealthy participants of Chinese, Japanese, or White/European ancestry will receive Placebo.
Part A: Cohort 1: Participants receiving GSK4771261 Dose level 1EXPERIMENTALHealthy participants will be randomized to receive GSK4771261 Dose level 1.
Part A: Cohort 2 : Participants receiving GSK4771261 Dose level 2EXPERIMENTALHealthy participants will be randomized to receive GSK4771261 Dose level 2.
Part A: Cohort 3: Participants receiving GSK4771261 Dose level 3EXPERIMENTALHealthy participants will be randomized to receive GSK4771261 Dose level 3.
Part A: Cohort 4: Participants receiving GSK4771261 Dose level 4EXPERIMENTALHealthy participants will be randomized to receive GSK4771261 Dose level 4.
Part A: Cohort 5: Participants receiving GSK4771261 Dose level 5EXPERIMENTALHealthy participants will be randomized to receive GSK4771261 Dose level 5.
Part A: Cohort 6: Participants receiving GSK4771261 Dose level 6EXPERIMENTALHealthy participants will be randomized to receive GSK4771261 Dose level 6.
Part A: Cohort 7 (optional): Participants receiving GSK4771261 Dose level 7EXPERIMENTALHealthy participants will be randomized to receive GSK4771261 Dose level 7 as the recommendation of Dose escalation committee (DEC).
Part A: Cohort 8 (optional): Participants receiving GSK4771261 Dose level 8EXPERIMENTALHealthy participants will be randomized to receive GSK4771261 Dose level 8, as per the recommendation from DEC.
Part B: Cohort 1: Participants receiving GSK4771261 Dose level 9EXPERIMENTALParticipant with Autosomal dominant polycystic kidney disease (ADPKD) will be randomized to receive GSK4771261 Dose level 9.
Part B: Cohort 2: Participants receiving GSK4771261 Dose level 10EXPERIMENTALParticipant with ADPKD will be randomized to receive GSK4771261 Dose level 10.
Part B: Cohort 3: Participants receiving GSK4771261 Dose level 11EXPERIMENTALParticipant with ADPKD will be randomized to receive GSK4771261 Dose level11.
Part B: Cohort 4 (optional): Participants receiving GSK4771261 Dose level 12EXPERIMENTALParticipant with ADPKD will be randomized to receive GSK4771261 Dose level 12 as the recommendation from DEC.
Part B: Cohort 5 (optional): Participants receiving GSK4771261 Dose level 13EXPERIMENTALParticipant with ADPKD will be randomized to receive GSK4771261 Dose level 13, as per the recommendation from DEC.
Part A: Participants receiving Placebo matching GSK4771261PLACEBO_COMPARATORParticipants will receive placebo matching GSK4771261
Part B: Participants receiving placebo matching GSK4771261PLACEBO_COMPARATORParticipants will receive placebo matching GSK4771261

Interventions

NameTypeDescription
GSK4771261DRUGGSK4771261 will be administered.
PlaceboDRUGPlacebo will be administered.
Placebo matching GSK4771261DRUGPlacebo matching GSK4771261 will be administered.
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Eligibility Criteria

Age Range25 Years to 55 Years
SexALL
Healthy VolunteersYes
Study Sites1

Inclusion Criteria: * Participants who are overtly healthy as determined by medical evaluation including medical history, physical examination, and laboratory tests. A participant with a clinical abnormality or laboratory parameter(s) which is/are not specifically listed in the inclusion or exclusi...

Countries:NetherlandsUnited StatesBelgiumCanadaFranceGermanySpainUnited Kingdom
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Recent Changes (Last 90 Days)

MEDIUMOct 5, 2026NCT07600450Status: NOT_YET_RECRUITING → RECRUITING
MEDIUMOct 5, 2026NCT07600450Status: NOT_YET_RECRUITING → RECRUITING
LOWJul 30, 2026NCT06734234primaryCompletionDate: changed
LOWJul 30, 2026NCT06734234primaryCompletionDate: changed

Frequently asked questions about GSK4771261

What is GSK4771261?

GSK4771261 is an investigational small molecule being developed by GSK plc for kidney disease. It is in Phase 1 clinical development and has not been approved for any indication. The program includes two active early-stage trials evaluating the compound in healthy participants and in participants with autosomal dominant polycystic kidney disease.

What is GSK4771261 used for?

GSK4771261 is being studied for kidney disease, including autosomal dominant polycystic kidney disease. It remains investigational and is not approved for any use. Clinical work so far is limited to Phase 1 studies assessing safety, tolerability, and effects on blood and urine markers in healthy participants and in participants with autosomal dominant polycystic kidney disease.

Who is developing GSK4771261?

GSK4771261 is developed by GSK plc, which trades under the ticker GSK. The company is running the Phase 1 program for the compound in kidney disease, with studies conducted across sites in Europe and North America.

What phase is GSK4771261 in?

GSK4771261 is in Phase 1 clinical development. Two Phase 1 trials are active, one recruiting and one active but not recruiting, with a combined planned enrollment of 116 participants. The drug is investigational and has not been approved by the FDA or any other regulator.

What clinical trials is GSK4771261 in?

GSK4771261 is being studied in two Phase 1 trials. NCT07600450 is a recruiting study in healthy participants aged 25 to 55 in the Netherlands, enrolling 30 people. NCT06734234 is active but not recruiting, enrolling 86 healthy participants and participants with autosomal dominant polycystic kidney disease across the United States, Belgium, Canada, France, Germany, Netherlands, Spain, and the United Kingdom.

Are the GSK4771261 trials randomized and placebo controlled?

Yes. The GSK4771261 Phase 1 program is randomized, double blind, and placebo controlled. The two studies together plan to enroll 116 participants, and both are in kidney disease, with one focused on healthy volunteers and the other including participants with autosomal dominant polycystic kidney disease.