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HS235

Phase 1

Pulmonary Arterial Hypertension | Monoclonal antibody | Cardiovascular |GSK plc|Trials Updated: Aug 17, 2026

HS235 development status

Highest phase Phase 1
Registered trials 2 across 1 sponsor since Aug 2025

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindPLACEBO_CONTROLLED
Total Trials2
Total Enrollment216

FDA Designations

No designations recorded

HS235 clinical trials

HS235 · 2 trials · 3 indications

Phase 1 2
NCT07123779HS235 Study in Obese Participants With Pulmonary Hypertension and Heart Failure With Preserved Ejection Fraction (HFpEF)Pulmonary Hypertension
RECRUITING126 Analytics
NCT07143448A Study of HS235 for Treatment of Pulmonary Arterial Hypertension (PAH) in AdultsPulmonary Arterial Hypertension
RECRUITING90 Analytics
PHASE1RECRUITING
HS235 Study in Obese Participants With Pulmonary Hypertension and Heart Failure With Preserved Ejection Fraction (HFpEF)
Pulmonary HypertensionUnlock trial analytics
PHASE1RECRUITING
A Study of HS235 for Treatment of Pulmonary Arterial Hypertension (PAH) in Adults
Pulmonary Arterial HypertensionUnlock trial analytics

Study Endpoints

Primary Endpoints

Incidence and Number of Adverse Events (AEs)
Up to 24 weeks

An AE is any untoward medical occurrence in a participant or clinical trial participant administered a pharmaceutical product and which does not necessarily have a causal relationship with this treatment. The incidence and number of participants who experience an AE will be reported.

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Study Design & Arms

AllocationRANDOMIZED
MaskingQUADRUPLE
ModelSEQUENTIAL
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
Investigational ProductEXPERIMENTALHS235 Subcutaneous Injection
PlaceboPLACEBO_COMPARATORSubcutaneous Injection
HS235EXPERIMENTALHS235 Subcutaneous Injection

Interventions

NameTypeDescription
HS235BIOLOGICALSubcutaneous Injection
PlaceboOTHERSubcutaneous Injection
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites1

Inclusion Criteria: Participants are eligible to be included in the study only if they meet at least all the following criteria: 1. Male or female, ≥ 18 years of age. 2. \[Sub-population A only - using a remote PAP sensor\]- Ambulatory PAP monitoring (e.g., CardioMEMS™ HF System or Cordella™ HF Sy...

Countries:United StatesSpain
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Frequently asked questions about HS235

What is HS235?

HS235 is an investigational monoclonal antibody being developed by GSK plc for pulmonary arterial hypertension and pulmonary hypertension. It is in Phase 1 clinical development and has not been approved by the FDA. GSK trades on the New York Stock Exchange under the ticker GSK.

What is HS235 used for in pulmonary arterial hypertension?

HS235 is being studied for the treatment of pulmonary arterial hypertension in adults, and also for pulmonary hypertension in obese patients with heart failure with preserved ejection fraction. It is investigational and has not been approved for any indication. Both programs are in Phase 1.

Who makes HS235?

HS235 is developed by GSK plc, which trades under the ticker GSK. GSK is running the Phase 1 clinical program for the antibody across pulmonary arterial hypertension and pulmonary hypertension indications, including sites in the United States and Spain.

What phase is HS235 in?

HS235 is in Phase 1 clinical development. It is investigational and has not received FDA approval. The program includes two recruiting Phase 1 trials, one in adults with pulmonary arterial hypertension and one in obese participants with pulmonary hypertension and heart failure with preserved ejection fraction.

What clinical trials is HS235 in?

HS235 is being evaluated in two recruiting Phase 1 trials. NCT07143448 is a placebo-controlled study of HS235 in adults with pulmonary arterial hypertension, enrolling 90 participants in the United States and Spain. NCT07123779 studies HS235 in obese participants with pulmonary hypertension and heart failure with preserved ejection fraction, enrolling 126 participants in the United States.

Is HS235 placebo controlled and blinded?

Yes. The HS235 Phase 1 program uses randomized, double-blind, placebo-controlled designs. NCT07143448 is a randomized, double-blind, placebo-controlled study of HS235 in adults with pulmonary arterial hypertension, and NCT07123779 is a randomized, double-blind, placebo-controlled study in obese participants with pulmonary hypertension and heart failure with preserved ejection fraction.