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Correspondence: Aaron Schimmer, MD, PhD, Princess Margaret Hospital, University of Toronto, Dept. of Hem./Onc., Room 9-516, 610 University Avenue, Toronto Ontario M5G 2M9, Canada; Phone (416) 946-2838; Fax (858) 496-6546, aaron.schimmer{at}utoronto.ca
Abstract
The IAPs (inhibitor of apoptosis proteins) are a family of caspase inhibitors that block the execution phase of apoptosis. Overexpression of IAPs confers chemoresistance and, in some groups of patients, is associated with a poor prognosis. Given their role in the development and progression of solid tumors and hematologic malignancies, efforts are underway to develop therapeutic IAP inhibitors, with a focus on X-linked IAP (XIAP) and survivin. Antisense oligonucleotides that target XIAP and survivin have been developed and are currently in phase I clinical trial. Small-molecules that bind and inhibit XIAP have also been identified and are in the process of clinical development. This review focuses on the preclinical data that support the development of IAP-targeted therapies.
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