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VH3810109

Phase 2

HIV Infections | Monoclonal antibody | Infectious Disease |GSK plc|Last Updated: Jul 29, 2026

Success Probability

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Trial Design

RandomizedACTIVE_CONTROLLEDDMC
Total Trials3
Total Enrollment339

FDA Designations

No designations recorded

Clinical trial landscape

VH3810109 · 3 trials · 1 indication

Phase 2 1Phase 1 2
NCT05996471A Study to Investigate the Virologic Efficacy and Safety of VH3810109 + Cabotegravir Compared to Standard of Care (SOC) in Male and Female Adults Living With Human Immunodeficiency Virus (HIV)HIV Infections
ACTIVE NOT_RECRUITING185 Analytics
PHASE2ACTIVE NOT_RECRUITING
A Study to Investigate the Virologic Efficacy and Safety of VH3810109 + Cabotegravir Compared to Standard of Care (SOC) in Male and Female Adults Living With Human Immunodeficiency Virus (HIV)
HIV InfectionsUnlock trial analytics

Study Endpoints

Primary Endpoints

Part 1 and Part 2B and 2C: Number of Participants with Plasma HIV-1 Ribonucleic acid (RNA) Greater Than or Equal to (≥)50 Copies per Millilitre (c/mL) per Snapshot Algorithm at Month 6
Month 6
Randomized Intervention Phase (Step 1): Change from baseline in cell-associated HIV-1 RNA transcripts per million cluster of differentiation 4 (CD4+) T cells
From Baseline (Day 1) to Month 12
Number of Participants With Grade 2 or Higher (>=) Adverse Events (AEs) Following SC Administration of VH3810109 (Part 1 and Part 3)
Up to Week 24

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. The Division of AIDS (DAIDS) Table for Grading the Severity of Adult and Pediatric AE was used for all AE severity grading, where Grade 1=Mild, 2=Moderate, 3=Severe, 4=Potentially life threatening. This outcome measure is presenting only data for Grade 2 or more of severity.

Number of Participants With Serious Adverse Events (SAEs) Following SC Administration of VH3810109 (Part 1 and Part 3)
Up to Week 24

An SAE is defined as any untoward medical occurrence that; results in death, is life-threatening, requires hospitalization or prolongation of existing hospitalization, results in disability/incapacity, is a congenital anomaly/birth defect or other situations as judged by physician.

Number of Participants With Injection Site Reactions (ISRs) Following VH3810109 SC Administration (Part 1 and 3)
Up to 7 days post-dose

ISRs were recorded via ISR diaries and managed through investigator assessment. The participants who experienced any injection site reaction were reported.

Number of Participants With Grade 2 to 4 Elevated Alanin Aminotransferase/Aspartate Aminotransferase (ALT/AST) Values Following VH3810109 SC Administration (Part 1 and 3)
Up to Week 24

Liver chemistry stopping and increased monitoring criteria is analyzed using DAIDS AE Grading Table, where Grade 2 (moderate): causing greater than minimal interference with usual social and functional activities, Grade 3 (severe): causing inability to perform usual social and functional activities, Grade 4 (Potentially life threatening): causing inability to perform basic self-care functions or hospitalization indicated.

Number of Participants With >= Grade 2 AEs Following IV Administration of VH3810109 (Part 2)
Up to Week 24

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. The Division of AIDS (DAIDS) Table for Grading the Severity of Adult and Pediatric AE was used for all AE severity grading, where Grade 1=Mild, 2=Moderate, 3=Severe, 4=Potentially life threatening. This outcome measure is presenting only data for Grade 2 or more of severity.

Number of Participants With SAEs Following IV Administration of VH3810109 (Part 2)
Up to Week 24

An SAE is defined as any untoward medical occurrence that; results in death, is life-threatening, requires hospitalization or prolongation of existing hospitalization, results in disability/incapacity, is a congenital anomaly/birth defect or other situations as judged by physician.

Number of Participants With Grade 2 to 4 Elevated ALT/AST Values Following VH3810109 IV Administration (Part 2)
Up to Week 24

Liver chemistry stopping and increased monitoring criteria is analyzed using DAIDS AE Grading Table, where Grade 2 (moderate): causing greater than minimal interference with usual social and functional activities, Grade 3 (severe): causing inability to perform usual social and functional activities, Grade 4 (Potentially life threatening): causing inability to perform basic self-care functions or hospitalization indicated.

Secondary Endpoints

Part 1, 2 and 3: Number of Participants with Serious Adverse Events (SAEs), Deaths, and Adverse Events (AEs) Leading to Discontinuation of Investigational Product (IP)
Up to Month 24
Part 1, 2 and 3: Number of Participants with Grade 3-4 AEs
Up to Month 24
Part 1, 2 and 3: Number of Participants with Grade 3-4 Laboratory Abnormalities
Up to Month 24
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Study Design & Arms

AllocationRANDOMIZED
MaskingNONE
ModelSEQUENTIAL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Part 1A: Participants Receiving VH3810109 Formulation 1 plus CabotegravirEXPERIMENTALParticipants will receive VH3810109 formulation 1 intravenously (IV) and Cabotegravir intramuscularly (IM) every month (QM). Participants from this arm will either transition to Part 2A or discontinue from the study and enter the LTFU period.
Part 1B: Participants Receiving VH3810109 plus rHuPH20 plus CabotegravirEXPERIMENTALParticipants will receive VH3810109 plus rHuPH20 via subcutaneous (SC) infusion and Cabotegravir IM. This arm was discontinued following preliminary results. Participants from this arm will either transition to Part 1A at the next dosing visit or withdraw from the Investigational Product (IP) and enter the LTFU.
Part 1C: Participants Receiving SOC ARTACTIVE_COMPARATORParticipants in this arm will either transition to Part 2B or Part 2C or discontinue from the study.
Part 2A: Participants Receiving VH3810109 Formulation 2 plus Cabotegravir Q2MEXPERIMENTALParticipants will receive VH3810109 formulation 2 intravenously (IV) and Cabotegravir intramuscularly (IM) every 2 months (Q2M). Participants from this arm will either transition to Part 3A or discontinue from the study and enter the LTFU period.
Part 2B: Participants Receiving VH3810109 Formulation 2 plus CabotegravirEXPERIMENTALParticipants will receive VH3810109 formulation 2 intravenously (IV) and Cabotegravir intramuscularly (IM) at Day 1, Month 1, Month 2 and then Q2M. Participants from this arm will either transition to Part 3A or discontinue from the study and enter the LTFU period.
Part 2C: Participants continuing SOC ARTACTIVE_COMPARATORParticipants in this arm will either transition to Part 3B or discontinue from the study.
Part 3A: Participants continuing VH3810109 Formulation 2 plus Cabotegravir Q2MEXPERIMENTALParticipants will continue to receive VH3810109 formulation 2 intravenously (IV) and Cabotegravir intramuscularly (IM) every 2 months (Q2M).
Part 3B: Participants receiving VH3810109 Formulation 2 plus CabotegravirEXPERIMENTALParticipants will receive VH3810109 formulation 2 intravenously (IV) and Cabotegravir intramuscularly (IM) at Day 1, Month 1, Month 2 and then Q2M.
Participants receiving SOC INSTI-based ART in Randomized Intervention Phase (Step 1)ACTIVE_COMPARATOR -
Participants receiving SOC INSTI-based ART+VH3810109 in Randomized Intervention Phase (Step 1)EXPERIMENTAL -
Participants receiving SOC INSTI-based ART+VH3810109+FTR in Randomized Intervention Phase (Step 1)EXPERIMENTAL -
Participants receiving VH3810109 in ATI Phase (Step 2)EXPERIMENTAL -
Part 1 Group: VH3810109 20 mg/kg + rHuPH20 [SC]EXPERIMENTALParticipants in this group received a single subcutaneous (SC) dose of VH3810109 20 mg/kg co-administered with rHuPH20 at Day 1 and were followed up to 24 weeks.
Part 2 Group: VH3810109 60 mg/kg [IV]EXPERIMENTALParticipants in this group received a single intravenous (IV) dose of VH3810109 60 mg/kg at Day 1 and were followed up to 24 weeks.
Part 3 Group: VH3810109 3000 mg + rHuPH20 [SC]EXPERIMENTALParticipants in this group received a single subcutaneous (SC) dose of VH3810109 3000 mg co-administered with rHuPH20 at Day 1 and were followed up to 24 weeks.

Interventions

NameTypeDescription
VH3810109BIOLOGICALVH3810109 will be administered.
CabotegravirDRUGCabotegravir will be administered.
Standard of care (SOC)DRUGPre-baseline SOC antiretroviral therapy (ART) will be administered.
rHuPH20BIOLOGICALrHuPH20 will be administered.
Fostemsavir (FTR)DRUGFostemsavir will be administered.
SOC INSTI-based ARTDRUGA SOC INSTI-based ART regimen will be administered.
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Eligibility Criteria

Age Range18 Years to 70 Years
SexALL
Healthy VolunteersNo
Study Sites45

Inclusion criteria Age 1. Participant must be 18 to 70 years of age inclusive, at the time of signing the informed consent. Type of Participant and Disease Characteristics 2. Must be on uninterrupted current regimen for at least 6 months prior to Screening. Any prior switch, defined as a chang...

Countries:United StatesPuerto RicoBelgiumDenmarkNetherlandsSpainUnited Kingdom
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Recent Changes (Last 90 Days)

LOWJul 29, 2026NCT05996471primaryCompletionDate: changed
LOWJul 29, 2026NCT05996471primaryCompletionDate: changed
LOWJul 7, 2026NCT07053384Enrollment: 107 → 130
LOWJul 7, 2026NCT07053384Enrollment: 107 → 130

Frequently asked questions about VH3810109

What is VH3810109 used for?

VH3810109 is an investigational monoclonal antibody being developed for the treatment of HIV infections. It is currently in Phase 2 clinical development, with studies evaluating its safety, pharmacokinetics, and virologic efficacy in people living with HIV.

What does VH3810109 target?

VH3810109 is a monoclonal antibody designed to target HIV. It is being studied for its ability to reduce the size and activity of the viral reservoir in people living with HIV, as well as in combination with other antiretroviral agents.

Who makes VH3810109?

VH3810109 is being developed by GSK plc, a global biopharma company listed on the London Stock Exchange under the ticker GSK. The company is conducting clinical trials to evaluate the drug's safety and efficacy in HIV infections.

What phase is VH3810109 in?

VH3810109 is currently in Phase 2 clinical development. It has completed a Phase 1 trial in healthy volunteers and is being evaluated in an ongoing Phase 2 study in adults living with HIV, as well as an additional Phase 1 study.

What clinical trials is VH3810109 in?

VH3810109 has been studied in three clinical trials. NCT05291520 was a completed Phase 1 study in healthy adults. NCT05996471 is an active Phase 2 trial comparing VH3810109 plus cabotegravir to standard of care. NCT07053384 is an active Phase 1 study evaluating VH3810109 with or without fostemsavir.

Is VH3810109 the same as GSK3810109?

Yes, VH3810109 is also known as GSK3810109. The alternative name appears in the title of the Phase 1 clinical trial NCT05291520, which investigated the safety and pharmacokinetics of a single dose of VH3810109, also referred to as GSK3810109.