Corticorelin Acetate, a Synthetic Corticotropin-Releasing Factor with Preclinical Antitumor Activity, Alone and with Bevacizumab, Against Human Brain Tumor Models
ANTICANCER RESEARCH 30: 5037-5042 (2010) Corticorelin Acetate, a Synthetic Corticotropin-releasing Factor with Preclinical Antitumor Activity, alone and with Bevacizumab, against Human Brain Tumor Models IDOIA GAMEZ1, ROBERT P. RYAN1 and STEPHEN T. KEIR2 1Celtic Pharmaceutical Development Services America, Inc., New York, NY 10022, U.S.A.; 2The Preston Robert Tisch Brain Tumor Center, Duke University, Durham, NC 27710, U.S.A. Abstract. Background: Corticorelin acetate (CrA) is a brain tumors. The cause of PBE is believed to result in part synthetic form of corticotropin-releasing factor that is from the leakage of edematous brain tumor fluid from currently undergoing clinical trials in the treatment of abnormal tumor vasculature into the surrounding tissue (1, peritumoral brain edema (PBE). This study preclinically 2). The mechanism(s) of action by which CrA exerts its investigated its potential as an antitumor agent against beneficial effect in the therapy of PBE has not been human brain tumor xenografts. Materials and Methods: The elucidated, but two factors appear to be relevant: decreased in vivo efficacy of CrA as a single agent and in combination vascular leakage and preserved integrity of the endothelial with the antiangiogenic agent, bevacizumab, was examined cells, which ultimately helps to maintain the blood-brain in three different patient-derived human brain tumor barrier (3, 4). xenografts implanted orthotopically (intracranially) or CrA appears to mediate its activity through two subtypes subcutaneously in athymic mice. Results: CrA significantly of G-protein coupled receptors: CRF receptor-1 (CRFR1) increased the lifespan of mice implanted orthotopically with and CRF receptor-2 (CRFR2) (5). These CRFRs are widely two different pediatric brain tumor xenograft models.
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