101. Deep sequencing reveals recurrent somatic mutations and distinct molecular subgroups in gastric cancer in Mizo population, North East India.
- Author
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Chakraborty P, Kurkalang S, Ghatak S, Das S, Palodhi A, Sarkar S, Dhar R, Chenkual S, Pachuau L, Zohmingthanga J, Pautu JL, Zomuana T, Lalruatfela ST, Zothanzama J, Kumar NS, and Maitra A
- Subjects
- Humans, Herpesvirus 4, Human genetics, Phosphatidylinositol 3-Kinases genetics, Mutation, Chromatin, High-Throughput Nucleotide Sequencing, Epstein-Barr Virus Infections complications, Epstein-Barr Virus Infections genetics, Epstein-Barr Virus Infections pathology, Stomach Neoplasms genetics, Stomach Neoplasms pathology
- Abstract
In India, Mizoram has the highest incidence of gastric cancer (GC) which might be associated with environmental factors such as diet, Helicobacter pylori (H.pylori) and Epstein-Barr virus (EBV) infections, and somatic genomic alterations. We performed PCR cum sequencing and fragment analysis for detection of H. pylori/EBV infection and microsatellite Instability (MSI) in GC patients (N = 68). Somatic mutations were identified by targeted and exome sequencing. We found 87% of GC patients infected with H. pylori and or EBV. Pathogenic infections were mostly mutually exclusive with only 16% of coinfection. TP53, MUC6, and ARID1A were significantly mutated. Two molecular subgroups with distinctive mutational profiles were identified: (1) patients harboring mutations in TP53 and (2) patients harboring mutations in RTK/RAS/PI3-K signaling pathway and chromatin-remodeling genes. Therefore, EBV and H. pylori infections and somatic mutations in the genes involved in RTK/RAS/PI3K signaling pathway, chromatin-remodeling, and TP53 might drive GC development and progression in Mizo patients., Competing Interests: Declaration of Competing Interest The authors declare no conflict of interest, financial or otherwise., (Copyright © 2023 The Authors. Published by Elsevier Inc. All rights reserved.)
- Published
- 2023
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