Fluphenazine Decanoate for Psoriasis

Condition(s) targeted: Psoriasis

Intervention: Fluphenazine Decanoate (Drug)

Phase: Phase 2

Status: Terminated

Sponsored by: Tufts-New England Medical Center

Official(s) and/or principal investigator(s):
Alice B Gottlieb, MD, PhD, Principal Investigator, Affiliation: Tufts-New England Medical Center

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.

Official title: Ascending-Dose, Double-Blind, Placebo-Controlled, Bilateral Study of Intralesional Fluphenazine Decanoate in Psoriasis

Study design: Treatment, Randomized, Double Blind (Subject, Investigator), Placebo Control, Single Group Assignment, Safety/Efficacy Study

Primary outcome: Improvement in Target Lesion Score at Week 4

Secondary outcome: Changes in target lesion pruritus Visual Analog Scale (VAS) at Week 4

Detailed description: 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., 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 PBMCs, Immune Control Inc. performed the following experiments. First, 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, 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.

Minimum age: 18 Years. Maximum age: 65 Years. Gender(s): Both.

Criteria:

Inclusion Criteria:

- Adults 18 to 65 years of age with psoriasis, in general good health

- Must have symmetric target lesions approximately 2-4 cm in diameter on each side of

the body (e. g., thighs) with baseline target lesion score of 6 or higher (scale of 0-12) for each target

- Women of childbearing potential must agree to use two forms of contraception for the

duration of the study

Exclusion Criteria:

- Infliximab (Remicade) or alefacept (Amevive) within the past 6 months (24 weeks)

- Etanercept (Enbrel), efalizumab (Raptiva), adalimumab (Humira), or other TNF-alpha

inhibitor within the past 3 months (12 weeks)

- Other systemic psoriasis therapies (e. g., methotrexate, cyclosporine, acitretin) or

PUVA (psoralen plus UVA) within the past 4 weeks

- UVB or topical therapy (other than OTC moisturizers and shampoos) within the past 2

weeks (including topical corticosteroids, vitamin A and D analogues)

- Receipt of an investigational agent within the past 4 weeks

- Systemic corticosteroid therapy

- Inability to understand consent or comply with protocol

- Pregnancy, lactation, or unwillingness to use adequate birth control during the study

- Impaired hepatic function

- Known HIV/AIDS, hepatitis B/C

- Blood dyscrasia

- Epilepsy

- Tardive dyskinesia

- Excessive alcohol consumption

- Current use of SSRI, tricyclic, or norephinephrine reuptake inhibitor antidepressants

or use within 6 weeks of beginning the study

- Concurrent use of anti-seizure drugs, with the exception of gabapentin for treatment

of neuropathy

- Use of phenothiazine antipsychotics or anticholinergics

- Known allergy to fluphenazine decanoate or other phenothiazines

- Known allergy to parabens/PABA, benzyl alcohol, sesame oil or sesame seeds

- Clinically significant mitral valve disease

- Clinically significant and uncontrolled cardiovascular disease

- QTc >450 msec, or evidence of a clinically significant dysrhythmia on ECG

- Operator of heavy machinery

- Pheochromocytoma

- History of breast cancer

- History of seizure disorder

- Occupational exposure to organophosphate insecticides

- Parkinson's disease and other related movement disorders

- Lab abnormalities including:

- AST/ALT ≥ 2X upper limit of reference range

- Creatinine ≥ 1. 5X upper limit of reference range

- Bilirubin ≥ 2X upper limit of reference range

- Absolute total lymphocyte or polymorphonuclear leucocyte count ≤ 1000/uL or ≥ 3X

upper limit of ref range

- Platelets ≤ 80,000/uL

- Hemoglobin ≤ 8. 0 g/dL

- Glucose ≥ 200 mg/dL

- Fasting blood sugar ≥ 126 mg/dL

- Concurrent use of drugs listed in Appendix F

Tufts-New England Medical Center, Boston, Massachusetts 02111, United States

Related publications:

Tutrone WD, Kagen MH, Barbagallo J, Weinberg JM. Biologic therapy for psoriasis: a brief history, II. Cutis. 2001 Dec;68(6):367-72. Review.

Kipnis CD, Myers WA, Opeola M, Gottlieb AB. Biologic treatments for psoriasis. J Am Acad Dermatol. 2005 Apr;52(4):671-82. No abstract available.

Gupta MA, Gupta AK. Psychiatric and psychological co-morbidity in patients with dermatologic disorders: epidemiology and management. Am J Clin Dermatol. 2003;4(12):833-42. Review.

Gupta MA, Guptat AK. The use of antidepressant drugs in dermatology. J Eur Acad Dermatol Venereol. 2001 Nov;15(6):512-8. Review.

Starting date: July 2006
Last updated: May 19, 2008