The modular network structure of the mutational landscape of Acute Myeloid Leukemia

Acute myeloid leukemia (AML) is associated with the sequential accumulation of acquired genetic alterations. Although at diagnosis cytogenetic alterations are frequent in AML, roughly 50% of patients present an apparently normal karyotype (NK), leading to a highly heterogeneous prognosis. Due to thi...

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Authors: Ibáñez, Mariam; Carbonell Caballero, José; Such, Esperanza; García Alonso, Luz; Liquori, Alessandro; López Pavía, María; Llop, Marta; Alonso, Carmen; Barragán, Eva; Gómez Seguí, Inés; Neef, Alexandre; Hervás Marín, David; Montesinos, Pau; Sanz, Guillermo; Sanz, Miguel Ángel; Dopazo, Joaquín; Cervera, José
Format: Article
Publication date:2018
Country:España
Institution:Universidad Católica de Valencia San Vicente Mártir
Repository:RIUCV. Repositorio de la Universidad Católica de Valencia San Vicente Mártir
Language:English
OAI Identifier:oai:riucv.ucv.es:20.500.12466/3894
Online Access:http://hdl.handle.net/20.500.12466/3894
Access Level:Open access
Keyword:Acute myeloid leukemia (AML)
Genetic
Mutation
2410 Biología Humana
2414 Microbiología
3205.04 Hematología
Summary:Acute myeloid leukemia (AML) is associated with the sequential accumulation of acquired genetic alterations. Although at diagnosis cytogenetic alterations are frequent in AML, roughly 50% of patients present an apparently normal karyotype (NK), leading to a highly heterogeneous prognosis. Due to this significant heterogeneity, it has been suggested that different molecular mechanisms may trigger the disease with diverse prognostic implications. We performed whole-exome sequencing (WES) of tumor-normal matched samples of de novo AML-NK patients lacking mutations in NPM1, CEBPA or FLT3-ITD to identify new gene mutations with potential prognostic and therapeutic relevance to patients with AML. Novel candidate-genes, together with others previously described, were targeted resequenced in an independent cohort of 100 de novo AML patients classified in the cytogenetic intermediate-risk (IR) category. A mean of 4.89 mutations per sample were detected in 73 genes, 35 of which were mutated in more than one patient. After a network enrichment analysis, we defined a single in silico model and established a set of seed-genes that may trigger leukemogenesis in patients with normal karyotype. The high heterogeneity of gene mutations observed in AML patients suggested that a specific alteration could not be as essential as the interaction of deregulated pathways.

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