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Protalix Reports Preclinical Data on Anti-TNF Follow-on Biologic Arthritis Drug.

Publication: Medical Letter on the CDC & FDA
Publication Date: 11-OCT-09 		Format: Online
Delivery: Immediate Online Access

Article Excerpt
Protalix Biotherapeutics, Inc. (NYSE-Amex: PLX), reported preclinical data on pr-antiTNF, a biosimilar version of etanercept (Enbrel™). Produced using the Company's proprietary ProCellEx™ technology, pr-antiTNF is a plant cell expressed recombinant fusion protein made from the soluble form of the human TNF receptor (TNFR), fused to the Fc component of a human antibody IgG1 domain. Pr-antiTNF has an identical amino acid sequence to Enbrel™. In vitro and preclinical animal studies have demonstrated that pr-antiTNF exhibits similar activity to Enbrel™. Specifically, pr-antiTNF binds TNF alpha thereby inhibiting it from binding to cellular surface TNF receptors and protects L929 cells from TNF-induced apoptosis in a dose-dependent manner. In a proof-of-concept in vivo study using an established arthritis animal model, pr-antiTNF administered intraperitoneally significantly improved the clinical arthritis parameters associated with this accepted arthritis mouse model including joint inflammation, swelling and...

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