OncoTargets and Therapy (Aug 2020)

The Somatic Mutation Landscape and RNA Prognostic Markers in Stomach Adenocarcinoma

  • Zhang X,
  • Zheng P,
  • Li Z,
  • Gao S,
  • Liu G

Journal volume & issue
Vol. Volume 13
pp. 7735 – 7746

Abstract

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Xiulei Zhang,1 Peiming Zheng,2 Zhen Li,1 Shanjun Gao,1 Guangzhi Liu1,3,4 1Department of Microbiome Laboratory, Henan Provincial People’s Hospital, People’s Hospital of Zhengzhou University, Zhengzhou 450003, People’s Republic of China; 2Department of Clinical Laboratory, Henan Provincial People’s Hospital, People’s Hospital of Zhengzhou University, Zhengzhou 450003, People’s Republic of China; 3Department of Obstetrics and Gynecology, Henan Provincial People’s Hospital, People’s Hospital of Zhengzhou University, Zhengzhou 450003, People’s Republic of China; 4Henan Key Laboratory of Stem Cell Differentiation and Modification, Henan Provincial People’s Hospital, People’s Hospital of Zhengzhou University, Zhengzhou 450003, People’s Republic of ChinaCorrespondence: Peiming Zheng; Guangzhi LiuPeople’s Hospital of Zhengzhou University, Zhengzhou 450003, People’s Republic of ChinaTel +86 37165897605Email [email protected]; [email protected]: Stomach cancer is one of the highest incidence and mortality malignancies worldwide. Our study aimed to illustrate the somatic mutation landscape and identify molecular markers of stomach cancer.Materials and Methods: By integrated analysis of sequencing data and clinical data of stomach adenocarcinoma (STAD) from The Cancer Genome Atlas (TCGA) database, we identified several susceptibility genes and novel molecular markers and validated their potential function by the starBase website. Further, we validated the clinical value of two candidate lncRNAs in collected STAD samples by RT-qPCR.Results: We illustrated the distributions of mutation frequencies and types to get the top 20 high-mutation frequency genes in STAD. We also found 2127 mRNAs, 129 miRNAs, and 170 lncRNAs that were differentially expressed. We identified four lncRNA-miRNA-mRNA ceRNAs (PVT1, MAGI2-AS3, MIR17HG, KCNQ1OT1). Besides, 27 mRNAs (PDE4C, ID1, AQP3, VCAN, FAP, NOX4, ANGPT2, SERPINE1, SPARC, PDGFRB, FN1, MFAP2, CSMD2, INHBA, COL10A1, MATN3, P4HA3, ADAMTS12, DGKI, OLFML2B, TMEM200A, FNDC1, CTHRC1, CHST1, F5, COL5A2, TUBB3) and two lncRNAs (MIR4458HG, LINC01235) showed a significant prognostic value, and their prognostic values were validated by the starBase website. What’s more, the clinical values of MIR4458HG and LINC01235 were also demonstrated in collected STAD samples.Conclusion: We constructed the lncRNA ceRNA networks and identified 20 high-mutation frequency genes and 29 prognostic markers (27 mRNAs and two lncRNAs).Keywords: STAD, mutation, ceRNA, lncRNA, prognostic marker

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