Randomized Double-Blind Placebo-Controlled Trial Using Recombinant Human Interleukin-10 for Moderate-to-Severe Psoriasis

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

PHASE2

Total Enrollment

36 participants

Study Classification

INTERVENTIONAL

Study Start Date

1999-01-31

Study Completion Date

2000-09-30

Brief Summary

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Several studies have documented an essential role for interleukin-10 (IL-10) in preventing prolonged and exaggerated immune responses to antigens and irritants. Psoriasis, a relatively common disease, is characterized by T cell-mediated inflammation in affected skin. In this study, the safety, tolerance, immunologic effects, and clinical activity of subcutaneous (SC) recombinant human (rh) IL-10 will be evaluated in patients with moderate-to-severe psoriasis. There will be 2 groups of patients, randomized to receive either 20 ug/kg rhIL-10 SC 3 times weekly (20 patients) or SC placebo (10 patients). This double-blind phase will continue for a total of 12 weeks and the principal evaluation will be the comparison between baseline and 12 week Psoriasis Area Severity Index (PASI) scores. Patients will come for an initial screening visit at day 0, and at weeks 1, 2, 4, 6, 8, and 12, with follow-up visits at weeks 16 and 20.

All patients will be offered rhIL-10 at 12 weeks (following the blinded portion of the study protocol). Patients initially receiving active medication who wish to continue rhIL-10 therapy will be kept on the drug. This open-label portion of the study will continue for an additional 12 weeks. Patients continuing with active drug will be evaluated at weeks 14, 16, 20, and 24.

Skin disease activity and toxicity will be assessed and recorded throughout the study. In addition, research studies will include functional assays to assess cytokine secretion and immunologic function of peripheral blood cells and immunohistochemical characterization of the inflammatory cells in skin.

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Detailed Description

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Several studies have documented an essential role for interleukin-10 (IL-10) in preventing prolonged and exaggerated immune responses to antigens and irritants. Psoriasis, a relatively common disease, is characterized by T cell-mediated inflammation in affected skin. In this study, the safety, tolerance, immunologic effects, and clinical activity of subcutaneous (SC) recombinant human (rh) IL-10 will be evaluated in patients with moderate-to-severe psoriasis. There will be 2 groups of patients, randomized to receive either 20 (micro)g/kg rhIL-10 SC 3 times weekly (20 patients) or SC placebo (10 patients). This double-blind phase will continue for a total of 12 weeks and the principal evaluation will be the comparison between baseline and 12 week Psoriasis Area Severity Index (PASI) scores. Patients will come for an initial screening visit at day 0, and at weeks 1, 2, 4, 6, 8, and 12, with follow-up visits at weeks 16 and 20.

All patients will be offered rhIL-10 at 12 weeks (following the blinded portion of the study protocol). Patients initially receiving active medication who wish to continue rhIL-10 therapy will be kept on the drug. This open-label portion of the study will continue for up to an additional 12 weeks. Patients continuing with active drug will be evaluated at weeks 14, 16, 20, and 24.

Skin disease activity and toxicity will be assessed and recorded throughout the study. In addition, research studies will include functional assays to assess cytokine secretion and immunologic function of peripheral blood cells and immunohistochemical characterization of the inflammatory cells in skin.

Conditions

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Psoriasis

Study Design

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Primary Study Purpose

TREATMENT

Interventions

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Recombinant human interleukin-10

Intervention Type DRUG

Eligibility Criteria

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Exclusion Criteria

No patients receiving disease modifying anti-inflammatory drugs (methotrexate, sulfasalazine, gold, hydroxychloroquine, cyclosporin, azathioprine, cyclophosphamide, chlorambucil, retinoids, vitamin D). Such drugs will be discontinued at least 4 weeks prior to randomization.

No pregnant females, nursing mothers, or patients of childbearing age not practicing birth control, since the risks to the unborn fetus and newborn child are unknown.

No previous history of malignancy or current malignancy other than satisfactorily treated basal-squamous cell carcinoma or in situ cervical carcinoma.

No confounding medical illness that in the judgment of the investigators would pose added risk for study participants (e.g., hepatic, hematologic \[e.g., hematocrit less than or equal to 28% or platelet counts less than 100,000/ml\], neurologic, renal, or pulmonary disease).

No patients with serum creatinine greater than 1.8 or creatinine clearance (CrCl) less than 50 ml/min.

No patients with abnormal liver function tests (e.g., serum glumatic oxalacetic transaminase, serum glutamic pyruvic transaminase or alkaline phosphatase levels greater than 2.5x upper limit of normal (UNL) and/or bilirubin levels 1.5x UNL).

No current alcohol or drug abuse.

Eligible Sex

ALL

Accepts Healthy Volunteers

No