( CAMBRIDGE Mass.--(BUSINESS WIRE)--Apr ...)Gloucester Pharmaceuticals Reports on Romidepsin and Erlotinib,Combination in Non-Small Cell Lung Cancer Presented at American,Association of Cancer Research Annual Meeting,Health

CAMBRIDGE, Mass.--(BUSINESS WIRE)--Apr 18, 2007 - Gloucester Pharmaceuticals, Inc., an oncology focused biopharmaceutical company, announced today that encouraging data from a preclinical study examining the combination of romidepsin and erlotinib in non-small cell lung cancer (NSCLC) cell lines derived from human cancer patients were presented at the American Association of Cancer Research Meeting annual meeting taking place in Los Angles, CA. The study was co-authored by Wei Zhang, Ph.D., Michael Peyton, Ph.D., John D. Minna, M.D., Adi F. Gazdar, M.D. and Eugene P. Frenkel, M.D., all of the Hamon Center for Therapeutic Oncology Research at University of Texas Southwestern Medical Center.

In an oral presentation entitled "Histone deacetylase inhibitor romidepsin enhances anti-tumor effect of erlotinib in non-small cell lung cancer (NSCLC) cell lines" Dr. Zhang showed data from a preclinical study designed to examine the effect of the histone deacetylase (HDAC) inhibitor romidepsin in combination with the tyrosine kinase inhibitor (TKI) erlotinib in NSCLC. In the in vitro arm of the study, 22 NSCLC cell lines were treated with either romidepsin, erlotinib or romidepsin and erlotinib together. For the in vivo arm of the study H1299 xenografts were inoculated subcutaneously into nude mice. The developing tumors were treated with either romidepsin, erlotinib or romidepsin and erlotinib together.

In her conclusions Dr. Zhang reported that romidepsin synergistically enhanced erlotinib sensitivity in wild type NSCLC cell lines by induction of profound apoptosis. This synergy was also shown in the nude mice xenografts but was not observed in epidermal growth factor (EGFR) mutant cell lines.

"The data from this study are very promising and suggest that combining romidepsin with TKIs such as erlotinib may enhance the clinical activity in the non-EGFR mutant patient population, which is thought to be approx
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