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  • Title: Alvocidib (Flavopiridol) suppresses tumor growth in SCID mice with human esophageal cancer xenografts without inducing apoptosis.
    Author: Sato S, Kajiyama Y, Sugano M, Iwanuma Y, Sonoue H, Matsumoto T, Tsurumaru M.
    Journal: Surg Oncol; 2006 Aug; 15(2):107-13. PubMed ID: 17097874.
    Abstract:
    Alvocidib (Flavopiridol, HMR1275) is a potent inhibitor of multiple cyclin-dependent kinases and has been identified recently as an antitumor agent in several cancers. Previous studies have shown that alvocidib could potentially treat esophageal cancer in vitro. This study evaluates alvocidib for its ability to suppress tumor growth in severe combined immunodeficiency (SCID) mice bearing TE8 human esophageal squamous cell carcinoma (SCC) xenografts. Alvocidib treatment of 10mg/kg body weight reduced tumor volume significantly. Immunohistochemistry analysis of alvocidib-treated tumor sections showed significant reductions in cyclin D1, VEGF, and Rb levels. Alvocidib treatment did not cause a marked increase in apoptotic tumor cells by terminal deoxynucleotidyl transferase-mediated dUTP nick end labeling (TUNEL) analysis, yet hematoxylin and eosin staining revealed tumor necrosis. In vivo investigation of alvocidib treatment confirmed antitumor activity in TE8 esophageal xenografts. These findings suggest that alvocidib could be a useful anti-cancer agent for esophageal cancer.
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