Status:
COMPLETED
A Study of the Efficacy and Safety of Frespaciguat (MK-5475) in Participants With Pulmonary Arterial Hypertension (INSIGNIA-PAH: Phase 2/3 Study of an Inhaled sGC Stimulator in PAH) (MK-5475-007)
Lead Sponsor:
Merck Sharp & Dohme LLC
Conditions:
Pulmonary Arterial Hypertension
Hypertension, Pulmonary
Eligibility:
All Genders
18-75 years
Phase:
PHASE2
PHASE3
Brief Summary
This is a two-part (Phase 2/Phase 3) study of frespaciguat, an inhaled soluble guanylate cyclase stimulator, in participants with pulmonary arterial hypertension (PAH). The first part (Phase 2) will ...
Eligibility Criteria
Inclusion
- Pulmonary arterial hypertension (PAH) in one of the following groups:
- Idiopathic PAH
- Heritable PAH
- Drug and toxin-induced PAH
- PAH associated with connective tissue disease, HIV infection, or congenital heart disease.
- Diagnosis of PAH documented by right heart catheterization (RHC).
- Eligibility RHC meeting all of the following criteria:
- Mean pulmonary artery pressure (mPAP) ≥25 mmHg
- Pulmonary vascular resistance (PVR) of ≥3 Wood units
- Pulmonary capillary wedge pressure (PCWP) or left ventricular end diastolic pressure (LVEDP) ≤15 mmHg.
- World Health Organization functional class (WHO-FC) symptoms between Class II and IV.
- Two 6-Minute walk distance (6MWD) measurements between 150 and 500 meters, one at screening and one at randomization.
- Stable concomitant background PAH-specific therapy.
- Body Mass Index (BMI) between 18.5 kg/m² and 40 kg/m² .
- Agree to be abstinent from heterosexual intercourse or use contraception during the intervention period and for at least 14 days after the last dose of study intervention.
- Female participants may not be pregnant or breastfeeding.
Exclusion
- Group 2 to 5 pulmonary hypertension.
- PAH in one of the following groups:
- Long term responders to calcium channel blockers
- Overt features of venous/capillary involvement
- Evidence of more-than-mild obstructive lung disease.
- Evidence of more-than-mild parenchymal lung disease.
- Evidence of more-than-mild obstructive sleep apnea (OSA) that is untreated.
- Evidence or history of left heart disease, including any of the following:
- Left ventricular ejection fraction (LVEF) ≤45%
- Moderate or severe left-sided valvular disease (aortic or mitral valve stenosis or regurgitation)
- Significant left ventricular diastolic dysfunction on echocardiographic evaluation
- Presence of 3 or more of the following risk factors for heart failure with preserved ejection fraction: BMI\>30 kg/m², essential systemic hypertension, diabetes mellitus of any type, or coronary artery disease.
- Oxygen saturation measured by pulse oximetry (SpO₂) \<90%, despite supplemental oxygen therapy.
- Chronic renal insufficiency (eGFR \<30 mL/min)
- Chronic liver disease (i.e., Child-Pugh B or C), portal hypertension, cirrhosis, or significant hepatic laboratory abnormalities.
- Current smoker or currently uses electronic cigarettes (vapes).
- History of cancer, except: nonmelanomatous skin carcinoma or carcinoma in situ of the cervix or other malignancies which have been successfully treated, with appropriate follow up, and unlikely to recur for the duration of the study.
Key Trial Info
Start Date :
May 19 2021
Trial Type :
INTERVENTIONAL
Allocation :
ACTUAL
End Date :
July 2 2024
Estimated Enrollment :
168 Patients enrolled
Trial Details
Trial ID
NCT04732221
Start Date
May 19 2021
End Date
July 2 2024
Last Update
May 25 2025
Active Locations (91)
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1
University of California San Diego Health-Pulmonary Critical Care ( Site 0061)
La Jolla, California, United States, 92037-7381
2
University of California Davis Health-Internal Medicine: Pulmonary, Critical Care and Sleep Medicine
Sacramento, California, United States, 95817
3
UCSF Helen Diller Medical Center at Parnassus Heights ( Site 0063)
San Francisco, California, United States, 94143
4
University of Colorado - Denver ( Site 0003)
Aurora, Colorado, United States, 80045