Quest PharmaTech Announces Positive Results from Phase I Clinical Trial of its Photodynamic Therapy for Actinic...(ing the clinical safetyendpoints. There ...)

Date:6/2/2008

ing the clinical safety endpoints. There were no observed clinically relevant adverse events associated with the treatment at all the concentrations (0 to 40 mg of SL017) and light doses (10 to 20 joules/cm(2)) administered. The light treatment, conveniently administered in a dermatology clinic, was well tolerated. The therapeutic potential of SL017 was evidenced by the expected (PDT) effects, such as redness, edema, occasional blisters, stinging and burning. The clinical correlates of dyskeratosis and inflammation were likewise appropriately noted on skin biopsy. Clinical and pathological results correlated very well, and conformed not only to the expected effects of PDT but also to the dosage of the drug and light energy administered. The study suggests that a 2% topical formulation of SL017 and a fluence of 20 joules/cm (2) provide expected PDT outcomes. Importantly, this Phase I study did not identify any safety concerns with respect to the parameters evaluated at the dosages of drug and light employed.

"I am encouraged by the confirmation of the topical PDT effects of SL017 and its potential for future applications in a variety of dermatological conditions including Actinic Keratosis," commented Dr. Gilles Lauzon, former Director, Division of Dermatology, University of Alberta and one of the investigators of the study.

The potential applications of cutaneous PDT also include acne, rosacea, superficial skin cancers, cutaneous T-cell lymphoma, localized scleroderma, warts, leishmaniasis and skin rejuvenation. Quest has already shown the follicular uptake of SL017 in humans; and is currently conducting a 90-patient trial addressing potential hair removal applications with results anticipated by end of this year. The Company is also evaluating the utility of SL017 for the treatment of acne in a preclinical model.

Paramount Biosciences, a global pharmaceutical and healthcare investment firm, has exclusive rights to develop and commercialize SL01
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SOURCE Quest PharmaTech Inc. Copyright©2008 PR Newswire. All rights reserved

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