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This study aimed to evaluate the impact of the myelodysplasia-related gene (MRG) as well as additional gene mutations on outcomes in intensively treated patients with -mutated ( ) AML. Targeted DNA sequencing of 263 genes was performed in 568 AML patients (median age: 59 years) entered into the prospective AMLSG 09-09 treatment trial. Most commonly co-mutated genes were (49.
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Instituto Venezolano de Investigaciones Científicas (IVIC), Unidad de Estudios Genéticos y Forenses (UEGF), Caracas 1020, República Bolivariana de Venezuela.
Colorectal cancer (CRC) is the third most commonly occurring cancer in men and the second most commonly occurring cancer in women. The epidermal growth factor receptor (EGFR) is relevant in the development and progression of CRC, because it is part of multiple signaling pathways involved in processes of the cell cycle, their malfunction causes dysregulation and subsequently carcinogenesis. Consequently, therapies were developed with anti-EGFR monoclonal antibodies (MAbs) that improve the survival of patients with CRC.
View Article and Find Full Text PDFThe small GTPase MRAS is a broken switch.
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Institute for Research in Immunology and Cancer (IRIC), Université de Montréal, Montréal, QC, H3T 1J4, Canada.
Intense research on founding members of the RAS superfamily has defined our understanding of these critical signalling proteins, leading to the premise that small GTPases function as molecular switches dependent on differential nucleotide loading. The closest homologs of H/K/NRAS are the three-member RRAS family, and interest in the MRAS GTPase as a regulator of MAPK activity has recently intensified. We show here that MRAS does not function as a classical switch and is unable to exchange GDP-to-GTP in solution or when tethered to a lipid bilayer.
View Article and Find Full Text PDFCo-evolution of atypical BRAF and KRAS mutations in colorectal tumorigenesis.
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University of Oxford, Oxford, United Kingdom.
BRAF mutations in colorectal cancer (CRC) comprise three functional classes: Class 1 (V600E) with strong constitutive activation, Class 2 with pathogenic kinase activity lower than Class 1, and Class 3 which paradoxically lacks kinase activity. Non-Class 1 mutations associate with better prognosis, microsatellite stability, distal tumour location and better anti-EGFR response. Analysis of 13 CRC cohorts (n=6,605 tumours) compared Class 1 (n=709, 10.
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Alterations in the RAS pathway underscore the pathogenic complexity of acute myeloid leukemia (AML), yet the full spectrum, including , , , , and , remains to be fully elucidated. In this retrospective study of 735 adult AML patients, the incidence of RAS pathway alterations was 32.4%, each with distinct clinical characteristics.
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