AU2013202506B2 — Resistance biomarkers for hdac inhibitors

USPTO Abstract

Provided herein are methods for identifying a cancer patient at risk for resistance to an HDAC inhibitor therapy, comprising obtaining a tumor sample from the cancer patient; detecting the presence of Testis-specific Y-encoded-like protein 5 (TSPYL5) expression in the sample; quantifying a level of the TSPYL5 expression in the sample, wherein a high level of the TSPYL5 expression, relative to a defined expression threshold of the TSPYL5, correlates with resistance to the HDAC inhibitor therapy; and applying the correlation to identify the cancer patient at risk for resistance to the HDAC inhibitor therapy. Also provided is a method for identifying a cancer patient with an increased likelihood of a positive clinical response to an HDAC inhibitor therapy comprising obtaining a tumor sample from the cancer patient; detecting the presence of Testis-specific Y-encoded-like protein 5 (TSPYL5) expression in said sample; quantifying a level of said TSPYL5 expression in said sample, wherein a low level of the TSPYL5 expression, relative to a defined expression threshold of the TSPYL5, identifies said cancer patient with an increased likelihood of a positive clinical response to said HDAC inhibitor therapy. Related methods and compositions are also provided. REPLACEMENT SHEET Primary tumor explants x 8 0.0625 0.25 1 4 16 64 romidepsin ICSO (nM) Figure 4 SDI-197963vi 226269 - 999402