Frequent mutations in the ligand-binding domain of PML-RARα after multiple relapses of acute promyelocytic leukemia: analysis for functional relationship to response to all-transretinoic acid and histone deacetylase inhibitors in vitro and in vivo

Abstract excerpt

This study identified missense mutations in the ligand binding domain of the oncoprotein PML-RARalpha in 5 of 8 patients with acute promyelocytic leukemia (APL) with 2 or more relapses and 2 or more previous courses of all-trans retinoic acid (RA)-containing therapy. Four mutations were novel (Lys207Asn, Gly289Arg, Arg294Trp, and Pro407Ser), whereas one had been previously identified (Arg272Gln; normal RARalpha1...

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