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GSK4425689A

Phase 1

Malaria, Falciparum | Monoclonal antibody | Infectious Disease |GSK plc|Trials Updated: Oct 5, 2026

GSK4425689A target and mechanism

ModalityMonoclonal antibody

Also known as GSK4425689A SC

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindCONTROLLED
Total Trials1
Total Enrollment40

FDA Designations

No designations recorded

GSK4425689A clinical trials

GSK4425689A · 1 trial · 1 indication

Phase 1 1
NCT07646353First-in-Human Dose-escalation of GSK4425689A: Safety, Tolerability, and PK in Healthy AdultsMalaria, Falciparum
RECRUITING40 Analytics
PHASE1RECRUITING
First-in-Human Dose-escalation of GSK4425689A: Safety, Tolerability, and PK in Healthy Adults
Malaria, FalciparumUnlock trial analytics

Study Endpoints

Primary Endpoints

Number of participants with adverse events (AEs) overall and by severity
From Day 1 up to Day 364

An AE is defined as 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. Grades are defined based on numeric criteria as follows Grade 1: mild; Grade 2: moderate; Grade 3: severe. Higher grades indicate greater severity.

Number of participants with serious adverse events (SAEs) overall and by severity
From Day -28 [informed consent form (ICF) signing] up to Day 364

An SAE is defined as any untoward medical . occurrence that results in death, is life- . threatening, requires inpatient hospitalization or extends existing hospitalization, causes . persistent or significant disability/incapacity, involves a congenital anomaly/birth defect in a participants offspring, includes an abnormal . pregnancy outcome, or occurs in any other . situation per the investigators judgement. Grades are defined based on numeric criteria as follows Grade 1: mild; Grade 2: moderate; Grade 3: severe. Higher grades indicate greater severity.

Secondary Endpoints

Bioavailability (F) of SC administration
From Day 1 until Day 197 [samples taken at pre-dose (within 1 hour) and at approximately 4, 8, 12, 24, 48, 72, 96, 120, 168, 336, 504, 672, 1344, 2016, 2688, 3360 and 4032 hours post-dose
Terminal serum half-life (t1/2)
From Day 1 until Day 197 [samples taken at pre-dose (within 1 hour) and at approximately 4, 8, 12, 24, 48, 72, 96, 120, 168, 336, 504, 672, 1344, 2016, 2688, 3360 and 4032 hours post-dose
Clearance (CL) of IV administration and apparent clearance (CL/F) of SC administration
From Day 1 until Day 197 [samples taken at pre-dose (within 1 hour) and at approximately 4, 8, 12, 24, 48, 72, 96, 120, 168, 336, 504, 672, 1344, 2016, 2688, 3360 and 4032 hours post-dose
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Study Design & Arms

AllocationRANDOMIZED
MaskingQUADRUPLE
ModelSEQUENTIAL
PurposePREVENTION

Treatment Arms

ArmTypeDescription
GSK4425689A Low Dose SC GroupEXPERIMENTALParticipants receive a low dose of GSK4425689A subcutaneously (SC) on Day 1.
GSK4425689A Low Dose IV GroupEXPERIMENTALParticipants receive a low dose of GSK4425689A intravenously (IV) on Day 1.
GSK4425689A Medium Dose SC GroupEXPERIMENTALParticipants receive a medium dose of GSK4425689A SC on Day 1.
GSK4425689A Medium Dose IV GroupEXPERIMENTALParticipants receive a medium dose of GSK4425689A IV on Day 1.
GSK4425689A High Dose IV GroupEXPERIMENTALParticipants receive a high dose of GSK4425689A IV on Day 1.

Interventions

NameTypeDescription
GSK4425689A SCBIOLOGICALParticipants receive GSK4425689A SC.
GSK4425689A IVBIOLOGICALParticipants receive GSK4425689A IV.
PlaceboDRUGParticipants receive Placebo in the same volume and route as the participants receiving GSK4425689A in the same cohort.
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Eligibility Criteria

Age Range18 Years to 65 Years
SexALL
Healthy VolunteersYes
Study Sites1

Inclusion Criteria: 1. Participants must be 18 to 65 years of age inclusive, at the time of signing the informed consent. 2. Participants must have a body weight between 50 and 100 kg, inclusive and body-mass index (BMI) within the range of 18.0 to 32.0 kg/m\^2. 3. Participants must be healthy male...

Countries:United Kingdom
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Recent Changes (Last 90 Days)

LOWOct 5, 2026NCT07646353Status: NOT_YET_RECRUITING → RECRUITING
LOWOct 5, 2026NCT07646353Status: NOT_YET_RECRUITING → RECRUITING

Frequently asked questions about GSK4425689A

What is GSK4425689A?

GSK4425689A is an investigational monoclonal antibody being developed by GSK plc for the prevention of Plasmodium falciparum malaria. It is currently in Phase 1 clinical development and has not been approved by any regulatory authority. It is also known as GSK4425689A SC.

What is GSK4425689A used for?

GSK4425689A is being studied for use against falciparum malaria, the most severe form of malaria caused by the Plasmodium falciparum parasite. The ongoing trial enrolls healthy adult volunteers in the United Kingdom to assess safety, tolerability, and pharmacokinetics rather than to treat active infection.

Who is developing GSK4425689A?

GSK4425689A is being developed by GSK plc, which trades on the New York Stock Exchange under the ticker GSK. GSK is the sole sponsor of the first-in-human study of this monoclonal antibody candidate.

What phase is GSK4425689A in?

GSK4425689A is in Phase 1 clinical development. It is an investigational product and has not received FDA approval or any other marketing authorization. The only trial conducted to date is a first-in-human Phase 1 study.

What clinical trials is GSK4425689A in?

GSK4425689A is being evaluated in a single Phase 1 trial, NCT07646353, titled First-in-Human Dose-escalation of GSK4425689A: Safety, Tolerability, and PK in Healthy Adults. The study is currently recruiting 40 healthy adult participants in the United Kingdom and is randomized, double-blind, and controlled.

Is GSK4425689A the same as GSK4425689A SC?

Yes, GSK4425689A SC is an alternative name for GSK4425689A. The SC designation refers to subcutaneous administration. Both names refer to the same investigational monoclonal antibody developed by GSK plc for falciparum malaria.