Evaluation of the Efficacy and Stability of Compounded Pentoxifylline-containing XemaTop for Psoriasis

Song, Guiyun; Ip, Kendice; Shan, Ashley; Banov, Daniel; Bassani, August S

Abstract

Evaluation of the Efficacy and Stability of Compounded Pentoxifylline-containing XemaTop for Psoriasis

Author(s): Song Guiyun, Ip Kendice, Shan Ashley, Banov Daniel, Bassani August S

Issue: Jul/Aug 2020 - Volume 24, Number 4

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Page(s): 337-345

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Abstract

Psoriasis is an inflammation-mediated skin disorder for which an efficacious topical treatment is yet to be identified. A new compounded topical formulation containing 10% pentoxifylline in XemaTop base was recently developed for psoriasis. Prior to its use in humans, an in vitro evaluation was performed to determine its efficacy in attenuating molecular markers associated with psoriasis using a three-dimensional psoriasis tissue model. After 5 days of topical exposure to the formulation, the levels of inflammatory cytokines IL-1ß, IL-6, and GM-CSF decreased by 20%, 94%, and 96%, respectively. The production of pro-collagen type I and fibronectin essential for cellular proliferation was also significantly inhibited with a concomitant thinning of the epidermis. These results suggest that 10% pentoxifylline in XemaTop is efficacious in inhibiting the biomarkers associated with psoriasis. Pentoxifylline in XemaTop was stable within 91 days when stored under refrigerated or ambient conditions. These biochemical and stability studies suggest that 10% pentoxifylline in XemaTop may be evaluated now in psoriasis patients.

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