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Ref Type Journal Article
PMID (23690417)
Authors Itzykson R, Kosmider O, Renneville A, Gelsi-Boyer V, Meggendorfer M, Morabito M, Berthon C, Adès L, Fenaux P, Beyne-Rauzy O, Vey N, Braun T, Haferlach T, Dreyfus F, Cross NC, Preudhomme C, Bernard OA, Fontenay M, Vainchenker W, Schnittger S, Birnbaum D, Droin N, Solary E
Title Prognostic score including gene mutations in chronic myelomonocytic leukemia.
Journal Journal of clinical oncology : official journal of the American Society of Clinical Oncology
Vol 31
Issue 19
Date 2013 Jul 01
URL
Abstract Text Several prognostic scoring systems have been proposed for chronic myelomonocytic leukemia (CMML), a disease in which some gene mutations-including ASXL1-have been associated with poor prognosis in univariable analyses. We developed and validated a prognostic score for overall survival (OS) based on mutational status and standard clinical variables.We genotyped ASXL1 and up to 18 other genes including epigenetic (TET2, EZH2, IDH1, IDH2, DNMT3A), splicing (SF3B1, SRSF2, ZRSF2, U2AF1), transcription (RUNX1, NPM1, TP53), and signaling (NRAS, KRAS, CBL, JAK2, FLT3) regulators in 312 patients with CMML. Genotypes and clinical variables were included in a multivariable Cox model of OS validated by bootstrapping. A scoring system was developed using regression coefficients from this model.ASXL1 mutations (P < .0001) and, to a lesser extent, SRSF2 (P = .03), CBL (P = .003), and IDH2 (P = .03) mutations predicted inferior OS in univariable analysis. The retained independent prognostic factors included ASXL1 mutations, age older than 65 years, WBC count greater than 15 ×10(9)/L, platelet count less than 100 ×10(9)/L, and anemia (hemoglobin < 10 g/dL in female patients, < 11g/dL in male patients). The resulting five-parameter prognostic score delineated three groups of patients with median OS not reached, 38.5 months, and 14.4 months, respectively (P < .0001), and was validated in an independent cohort of 165 patients (P < .0001).A new prognostic score including ASXL1 status, age, hemoglobin, WBC, and platelet counts defines three groups of CMML patients with distinct outcomes. Based on concordance analysis, this score appears more discriminative than those based solely on clinical parameters.

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Molecular Profile Treatment Approach
Gene Name Source Synonyms Protein Domains Gene Description Gene Role
Therapy Name Drugs Efficacy Evidence Clinical Trials
Drug Name Trade Name Synonyms Drug Classes Drug Description
Gene Variant Impact Protein Effect Variant Description Associated with drug Resistance
Molecular Profile Indication/Tumor Type Response Type Therapy Name Approval Status Evidence Type Efficacy Evidence References
ASXL1 inact mut myelodysplastic/myeloproliferative neoplasm not applicable N/A Clinical Study Prognostic In multiple clinical studies, nonsense and frameshift mutations in ASXL1 were associated with decreased overall survival in patients with chronic myelomonocytic leukemia (PMID: 26849014, PMID: 23690417, PMID: 20880116). 20880116 26849014 23690417
CBL mutant myelodysplastic/myeloproliferative neoplasm not applicable N/A Clinical Study Prognostic In clinical analyses, mutations in CBL were associated with adverse prognosis in patients with chronic myelomonocytic leukemia (PMID: 26230957, PMID: 23690417, PMID: 19901108). 26230957 19901108 23690417