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We are doing this research study to evaluate the effectiveness and safety of fluphenazine decanoate when injected with a needle into psoriasis lesions in adults. Fluphenazine decanoate is FDA (U.S. Food and Drug Administration) approved for use in people who have schizophrenia and psychotic symptoms. Fluphenazine decanoate is not approved by the FDA for use in psoriasis. Fluphenazine decanoate slows T cell growth in cells in laboratory test tubes. Its usefulness and safety in people with psoriasis will be investigated in this study.
Psoriasis is a hyperproliferative, inflammatory, immune-mediated skin disease that affects approximately 2% of the United States and European populations (Tutrone 2001, Kipnis 2005). This disease manifests as red, scaly plaques that are itchy and/or painful. Patients with psoriasis may be socially stigmatized because of their appearance. Currently, there is no cure for this condition. Often, repeated medical treatments are necessary and can become expensive. Treatment with topical corticosteroids is the mainstay therapy for mild to moderate psoriasis. In more severe cases, systemic therapies (e.g., cyclosporine) and phototherapy (e.g., ultraviolet B (UVB) irradiation) are used. These treatments, however, are associated with toxicities or inconvenience. There is anecdotal evidence to suggest that antipsychotic drugs have a beneficial effect on psoriasis (Gupta 2001, 2003).
Fluphenazine is a phenothiazine antipsychotic drug. In vitro, fluphenazine kills activated human T cells under conditions that do not affect resting T cells (Immune Control Inc. data not shown). To determine the size of a therapeutic window for human peripheral blood mononuclear cells (PBMC)s, Immune Control Inc. performed the following experiments. First, phytohemagglutinin- (PHA)-activated cells were exposed to 2, 10, or 20 µM fluphenazine for 0, 18, 24, 36, 48, or 72 hours. Second, resting cells were exposed to identical fluphenazine concentrations for identical time periods, after which the drug was washed out of the cells, and the cells activated with PHA. In all cases, deoxyribonucleic acid (DNA) synthesis was measured by exposing the cells to tritiated thymidine, and measuring the incorporated nucleotide by scintillation counting. The data show that exposure of activated cells to 10 µM fluphenazine for 72 hours, or 20 µM fluphenazine for 36 hours, caused the death of virtually all of the activated cells. The ability of the resting cells to initiate DNA synthesis after activation, by contrast, was largely unaffected by these fluphenazine exposures. Although we cannot precisely control intralesional fluphenazine concentrations, we expect that injections of up to 1 mg fluphenazine decanoate will yield local concentrations that exceed 10 µM without significant systemic fluphenazine concentrations.
We propose that fluphenazine will suppress proliferating T-lymphocytes in psoriatic plaques in vivo and thus result in healing of plaques. The objective of this study is to assess the safety and biologic activity of intralesional injection of fluphenazine decanoate in adult subjects with psoriasis.
Allocation: Randomized, Control: Placebo Control, Endpoint Classification: Safety/Efficacy Study, Intervention Model: Parallel Assignment, Masking: Double Blind (Subject, Investigator), Primary Purpose: Treatment
Fluphenazine Decanoate, Placebo
Tufts-New England Medical Center
Tufts Medical Center
Published on BioPortfolio: 2014-08-27T03:43:21-0400
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A phenothiazine used in the treatment of PSYCHOSES. Its properties and uses are generally similar to those of CHLORPROMAZINE.
A common genetically determined, chronic, inflammatory skin disease characterized by rounded erythematous, dry, scaling patches. The lesions have a predilection for nails, scalp, genitalia, extensor surfaces, and the lumbosacral region. Accelerated epidermopoiesis is considered to be the fundamental pathologic feature in psoriasis.
Misunderstanding among individuals, frequently research subjects, of scientific methods such as randomization and placebo controls.
An effect usually, but not necessarily, beneficial that is attributable to an expectation that the regimen will have an effect, i.e., the effect is due to the power of suggestion.
A topical anti-inflammatory glucocorticoid used in DERMATOSES, skin allergies, PSORIASIS, etc.
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