A combination of the experimental histone deacetylase (HDAC) inhibitor entinostat with the anti-PD-1 therapeutic pembrolizumab (Keytruda) showed clinical responses in patients with melanoma that had progressed on prior anti-PD-1 treatment, according to results from the ENCORE 601 phase Ib/II clinical trial presented at the AACR Annual Meeting 2019, March 29-April 3.
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