A Study to Evaluate the Efficacy of an Oral Medication in the Treatment and Prevention of Digital Ulcers in Patients With Systemic Sclerosis (Scleroderma).
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This is a research study of an investigational drug called ambrisentan (Letairis) in the treatment and prevention of digital ulcers in patients with systemic sclerosis.
Condition or disease
n UlcerScleroderma, Systemic
Ambrisentan is an endothelin blocker approved for the treatment of pulmonary arterial hypertension. Patients with systemic sclerosis can have damage to their blood vessels, resulting in increased levels of endothelin in their bloodstream that then causes decreased blood flow to the digits. This can result in very painful digital ulcers. We hope to learn whether blocking the action of endothelin with ambrisentan will be helpful in the treatment and prevention of digital ulcers in patients with systemic sclerosis. This therapy is not approved for the treatment of systemic sclerosis, but this study will help us learn whether ambrisentan is safe and effective in the treatment and prevention of digital ulcers in patients with systemic sclerosis.
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Layout table for eligibility information
Ages Eligible for Study:
18 Years and older (Adult, Older Adult)
Sexes Eligible for Study:
Accepts Healthy Volunteers:
Diagnosis of limited or diffuse systemic sclerosis (SSc) according to American College of Rheumatology or LeRoy criteria
Age greater than 18 years of age
At least one digital ulcer located on the volar or lateral surface at or distal to the proximal interphalangeal joints
At least one new DU that developed within 12 weeks prior to screening
Vasodilator therapies, including calcium channel blockers, alpha-1-antagonists, ACE-inhibitors, nitroglycerin, and angiotensin receptor blockers, are permitted as long as the doses are stable for 2 weeks prior to screening and throughout the study
Treatment with omeprazole or other proton pump inhibitors must be stable for 2 weeks prior to screening and throughout the study
Patients with pulmonary arterial hypertension, NYHA Class III or IV
Patients who are hemodynamically unstable, or have acute renal, cardiac or pulmonary failure