Initial Dual Oral Combination Therapy Versus Standard-of-care Initial Oral Monotherapy Prior to Balloon Pulmonary Angioplasty in Patients With Inoperable Chronic Thromboembolic Pulmonary Hypertension
Study Purpose
Chronic thromboembolic pulmonary hypertension (CTEPH) is characterised by an obstruction of proximal or more distal pulmonary arteries by residual organized thrombi, combined with a variable microscopic pulmonary vasculopathy (microvasculopathy). Besides lifelong anticoagulation, surgical pulmonary endarterectomy is the treatment of choice in subjects with proximal CTEPH affecting large pulmonary arteries. However, around half of CTEPH subjects are not operated, mainly because of distal lesions inaccessible to surgery. International data have reported survival rates of 88, 79, and 70% at 1, 2, and 3 years, respectively, in subjects with inoperable CTEPH, underscoring the need for better treatment strategies. In those subjects, current guidelines recommend medical therapy with or without balloon pulmonary angioplasty (BPA). Currently, only one drug (riociguat), targeting the NO pathway, is approved and reimbursed in Europe. Thus, riociguat monotherapy is considered as the standard-of-care treatment for subjects newly diagnosed with inoperable CTEPH. Recently, macitentan, targeting the endothelin-1 pathway, showed to be also effective in subjects with inoperable CTEPH. However, macitentan is currently not approved for CTEPH in Europe. BPA has been also reported to improve hemodynamics, symptoms and exercise capacity. However, complications, including mainly vascular injury, may occur during this procedure and it has been shown that the risk of BPA-related complications was strongly related to the level of pre-BPA mean pulmonary artery pressure (mPAP) and pulmonary vascular resistance (PVR). Medical therapy and BPA have in fact complementary effects since they target different lesions. Indeed, BPA targets fibrotic organized thrombi in the segmental arteries down to small pulmonary arteries of 2-5 mm in diameter. Medical therapy, for its part, targets microvasculopathy, similar to that observed in pulmonary arterial hypertension (PAH), in vessels less than 0.5 mm in diameter. Therefore, it is strongly believed that the use of medical therapy prior to BPA may reduce the risk of BPA-related complications by improving pulmonary hemodynamics and may improve global efficacy. In PAH, initial dual oral combination therapy with drugs targeting the NO and endothelin pathways is considered as a standard of care, more efficacious than monotherapy and safe. In contrast, there are no data from controlled trials regarding the efficacy and safety of initial combination therapy regimens versus standard-of-care monotherapy in treatment-naïve subjects with inoperable CTEPH. The investigators hypothesize that initial dual oral combination therapy may be superior to standard-of-care riociguat monotherapy for improving pulmonary hemodynamics prior to BPA and for reducing the risk of BPA-related complications.
Recruitment Criteria
Accepts Healthy Volunteers
Healthy volunteers are participants who do not have a disease or condition, or related conditions or symptoms |
No |
Study Type
An interventional clinical study is where participants are assigned to receive one or more interventions (or no intervention) so that researchers can evaluate the effects of the interventions on biomedical or health-related outcomes. An observational clinical study is where participants identified as belonging to study groups are assessed for biomedical or health outcomes. Searching Both is inclusive of interventional and observational studies. |
Interventional |
Eligible Ages | 18 Years - 80 Years |
Gender | All |
Trial Details
Trial ID:
This trial id was obtained from ClinicalTrials.gov, a service of the U.S. National Institutes of Health, providing information on publicly and privately supported clinical studies of human participants with locations in all 50 States and in 196 countries. |
NCT04780932 |
Phase
Phase 1: Studies that emphasize safety and how the drug is metabolized and excreted in humans. Phase 2: Studies that gather preliminary data on effectiveness (whether the drug works in people who have a certain disease or condition) and additional safety data. Phase 3: Studies that gather more information about safety and effectiveness by studying different populations and different dosages and by using the drug in combination with other drugs. Phase 4: Studies occurring after FDA has approved a drug for marketing, efficacy, or optimal use. |
Phase 2/Phase 3 |
Lead Sponsor
The sponsor is the organization or person who oversees the clinical study and is responsible for analyzing the study data. |
Assistance Publique - Hôpitaux de Paris |
Principal Investigator
The person who is responsible for the scientific and technical direction of the entire clinical study. |
Xavier JAIS, Dr |
Principal Investigator Affiliation | Assistance Publique - Hôpitaux de Paris |
Agency Class
Category of organization(s) involved as sponsor (and collaborator) supporting the trial. |
Other, Industry |
Overall Status | Recruiting |
Countries | France |
Conditions
The disease, disorder, syndrome, illness, or injury that is being studied. |
Thromboembolic Pulmonary Hypertension, Chronic Disease, Inoperable Disease |
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