PMID- 20007803 OWN - NLM STAT- MEDLINE DCOM- 20100326 LR - 20211203 IS - 1528-0020 (Electronic) IS - 0006-4971 (Print) IS - 0006-4971 (Linking) VI - 115 IP - 7 DP - 2010 Feb 18 TI - FLT3-mutant allelic burden and clinical status are predictive of response to FLT3 inhibitors in AML. PG - 1425-32 LID - 10.1182/blood-2009-09-242859 [doi] AB - We examined 6 different FMS-like tyrosine kinase-3 (FLT3) inhibitors (lestaurtinib, midostaurin, AC220, KW-2449, sorafenib, and sunitinib) for potency against mutant and wild-type FLT3, as well as for cytotoxic effect against a series of primary blast samples obtained from patients with acute myeloid leukemia (AML) harboring internal tandem duplication (FLT3/ITD) mutations. We found that inhibition of FLT3 autophosphorylation in a FLT3/ITD specimen does not always induce cell death, suggesting that some FLT3/ITD AML may not be addicted to FLT3 signaling. Relapsed samples and samples with a high mutant allelic burden were more likely to be responsive to cytotoxicity from FLT3 inhibition compared with the samples obtained at diagnosis or those with a low mutant allelic burden. These FLT3 inhibitors varied to a considerable degree in their selectivity for FLT3, and this selectivity influenced the cytotoxic effect. These results have important implications for the potential therapeutic use of FLT3 inhibitors in that patients with newly diagnosed FLT3-mutant AML might be less likely to respond clinically to highly selective FLT3 inhibition. FAU - Pratz, Keith W AU - Pratz KW AD - Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University, Baltimore, MD 21231, USA. FAU - Sato, Takashi AU - Sato T FAU - Murphy, Kathleen M AU - Murphy KM FAU - Stine, Adam AU - Stine A FAU - Rajkhowa, Trivikram AU - Rajkhowa T FAU - Levis, Mark AU - Levis M LA - eng GR - P50 CA100632/CA/NCI NIH HHS/United States GR - R01 CA128864/CA/NCI NIH HHS/United States GR - R01 CA128864-04/CA/NCI NIH HHS/United States GR - SPORE P50 CA100632-06/CA/NCI NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural PT - Research Support, Non-U.S. Gov't DEP - 20091210 PL - United States TA - Blood JT - Blood JID - 7603509 RN - 0 (Antineoplastic Agents) RN - 0 (Benzenesulfonates) RN - 0 (Benzothiazoles) RN - 0 (Carbazoles) RN - 0 (Furans) RN - 0 (Indazoles) RN - 0 (Indoles) RN - 0 (KW 2449) RN - 0 (Phenylurea Compounds) RN - 0 (Piperazines) RN - 0 (Pyridines) RN - 0 (Pyrroles) RN - 25X51I8RD4 (Niacinamide) RN - 7LA4O6Q0D3 (quizartinib) RN - 9ZOQ3TZI87 (Sorafenib) RN - DO989GC5D1 (lestaurtinib) RN - EC 2.7.10.1 (FLT3 protein, human) RN - EC 2.7.10.1 (fms-Like Tyrosine Kinase 3) RN - H88EPA0A3N (Staurosporine) RN - ID912S5VON (midostaurin) RN - V99T50803M (Sunitinib) SB - IM MH - Alleles MH - Antineoplastic Agents/*pharmacology MH - Benzenesulfonates/pharmacology MH - Benzothiazoles/pharmacology MH - Carbazoles/*pharmacology MH - Cell Death/drug effects MH - Cell Line, Tumor MH - Drug Resistance, Neoplasm/genetics MH - Furans MH - Humans MH - Indazoles/pharmacology MH - Indoles/pharmacology MH - Leukemia, Myeloid, Acute/*drug therapy/*genetics MH - Mutation MH - Niacinamide/analogs & derivatives MH - Phenylurea Compounds/pharmacology MH - Phosphorylation/drug effects MH - Piperazines/pharmacology MH - Pyridines/pharmacology MH - Pyrroles/pharmacology MH - Sorafenib MH - Staurosporine/analogs & derivatives/pharmacology MH - Sunitinib MH - fms-Like Tyrosine Kinase 3/*antagonists & inhibitors/*genetics PMC - PMC2826764 EDAT- 2009/12/17 06:00 MHDA- 2010/03/27 06:00 PMCR- 2011/02/18 CRDT- 2009/12/17 06:00 PHST- 2009/12/17 06:00 [entrez] PHST- 2009/12/17 06:00 [pubmed] PHST- 2010/03/27 06:00 [medline] PHST- 2011/02/18 00:00 [pmc-release] AID - S0006-4971(20)56754-2 [pii] AID - 2009/242859 [pii] AID - 10.1182/blood-2009-09-242859 [doi] PST - ppublish SO - Blood. 2010 Feb 18;115(7):1425-32. doi: 10.1182/blood-2009-09-242859. Epub 2009 Dec 10.