Transcriptome Sequencing and MiRNA-mRNA Network Construction in Exosome of Macrophage M2 in Stomach Adenocarcinoma

Overview

Journal World J Surg Oncol

Publisher Biomed Central

Specialties General Surgery
Oncology

Date 2023 Jun 27

PMID 37370118

Authors

Dun Pan

Zhipeng Li

Xin Lin

Liangqing Li

Affiliations

Soon will be listed here.

Abstract

Background: Stomach adenocarcinoma (STAD) is the most common histological type of gastric cancer (GC). Macrophages are an essential part of the tumor microenvironment. We attempted to search for potential molecular markers associated with macrophages, which might be helpful for STAD diagnosis and treatment.

Methods: Firstly, exosome in macrophages was extracted for RNA sequencing to identify differentially expressed microRNAs (miRNAs) (DEmiRNAs). Then, DEmiRNAs and differentially expressed mRNAs (DEmRNAs) were screened in the Cancer Genome Atlas (TCGA) database. The miRNAs related to macrophage M2 polarization were obtained by intersecting the DEmiRNAs obtained from the sequencing data and TCGA data. Using the Pearson correlation coefficient method, the mRNAs significantly related to macrophage M2 were screened out, followed by construction of the macrophage M2-miRNA-mRNA network. Subsequently, real-time-polymerase chain reaction (RT-PCR) and online datasets were applied to validate the expression of DEmiRNAs and DEmRNAs.

Results: A total of 6 DEmiRNAs were identified in RNA sequencing; 59 DEmiRNAs and 1838 DEmRNAs were identified in TCGA database. Among which, a common miRNA (hsa-miR-133a-3p) associated with the M2 polarization of macrophages was identified. Fifteen common mRNAs were obtained between DEmRNAs and mRNAs targeted by DEmiRNAs. Eventually, a core macrophage M2-1 down-regulated miRNA-7 and up-regulated mRNAs network was constructed, including hsa-miR-133a-3p, SLC39A1, TTYH3, HAVCR2, TPM3, XPO1, POU2F1, and MMP14. The expression of miRNA and mRNAs was in line with the validation results of RT-PCR and online datasets.

Conclusion: In this study, the screening of biomarkers in exosome of macrophage M2 may contribute to the prognosis of STAD patients.

Citing Articles

Gender Differences and miRNAs Expression in Cancer: Implications on Prognosis and Susceptibility.

Caserta S, Gangemi S, Murdaca G, Allegra A Int J Mol Sci. 2023; 24(14).

PMID: 37511303 PMC: 10380791. DOI: 10.3390/ijms241411544.

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