Scleroderma, Systemic Clinical Trial
Official title:
Effect of Sildenafil on the Microcirculatory Blood Flow and on the Endothelial Progenitor Cells in Patients With Systemic Sclerosis: a Randomized, Double-blind, Placebo-controlled Clinical Trial
Early phases of systemic sclerosis is characterized by inflammatory and microvasculature alterations. Sildenafil citrate has been shown to have vasodilatory effects and to enhance vasculogenesis. The purpose of this study is to evaluate the effect of sildenafil citrate on hand blood flow of patients with systemic sclerosis, using Laser Doppler Imaging.
Status | Recruiting |
Enrollment | 44 |
Est. completion date | April 2012 |
Est. primary completion date | April 2012 |
Accepts healthy volunteers | No |
Gender | Both |
Age group | 18 Years and older |
Eligibility |
Inclusion Criteria: - Systemic sclerosis according to the classification criteria of the American College of Rheumatology (1980) with no more than 4 years since diagnosis - Early systemic sclerosis as defined by LeRoy and Medsger (2001) - 6 or more Raynaud's crisis per week - Written informed consent provided by the subjects prior to initiating study procedures Exclusion Criteria: - Smoking - Peripheral or central vasculopathy other than Systemic sclerosis - Uncontrolled Diabetes - Liver disease - Pregnant or lactating woman - Current use of cyclosporin, prostanoids, bosentan or any PDE-5 inhibitors (including current Sildenafil use during randomization) - History of stroke, myocardial infarction or life threatening cardiac condition within the last 6 months - History of surgical sympathectomy - Systolic blood pressure < 85mm Hg - History of scleroderma renal crisis - Known hypersensitivity to Sildenafil or any of the excipients - History of Retinitis Pigmentosa - Current use of Nitrates |
Allocation: Randomized, Endpoint Classification: Efficacy Study, Intervention Model: Parallel Assignment, Masking: Double Blind (Subject, Caregiver, Investigator, Outcomes Assessor), Primary Purpose: Treatment
Country | Name | City | State |
---|---|---|---|
Brazil | Systemic Sclerosis Outpatient Clinic, Hospital Sao Paulo, UNIFESP | Sao Paulo | SP |
Lead Sponsor | Collaborator |
---|---|
Federal University of São Paulo | Fundação de Amparo à Pesquisa do Estado de São Paulo |
Brazil,
Type | Measure | Description | Time frame | Safety issue |
---|---|---|---|---|
Primary | Digital skin microvascular blood flow by means of Laser Doppler Imaging (LDI). | 8 weeks | No | |
Secondary | Number and proliferative capacity of endothelial progenitor cells (EPC) | 8 weeks | No | |
Secondary | Serum levels of vascular endothelial growth factor (VEGF) | 8 weeks | No | |
Secondary | Clinical features of Raynaud's phenomenon and digital ulcers | Raynaud's Condition Score, HAQ and specific VAS scales for Raynaud's phenomenon and disability. | 8 weeks | No |
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