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Detection of a Circulating MicroRNA Custom Panel in Patients with Metastatic Colorectal Cancer
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Detection of a Circulating MicroRNA Custom Panel in Patients with Metastatic Colorectal Cancer

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Hsa-miR-875-5p exerts tumor suppressor function through down-regulation of EGFR in colorectal carcinoma (CRC)

Tiening Zhang1, Xun Cai1, Qi Li1

  • 1Oncology Center, Shanghai General Hospital, Shanghai Jiaotong University, School of Medicine, Shanghai 200080, P. R. China.

Oncotarget
|June 16, 2016
PubMed

Insights

Hsa-miRNA-875-5p (miR-875-5p) suppresses colorectal cancer (CRC) by inhibiting cell growth, migration, and invasion. This microRNA promotes apoptosis and targets the oncogene EGFR, offering potential therapeutic strategies for CRC.

Area of Science:

  • Molecular Biology
  • Oncology
  • Genetics

Background:

  • Hsa-miRNA-875-5p (miR-875-5p) shows anticancer effects, but its role in colorectal carcinoma (CRC) is unclear.
  • miR-875-5p is significantly downregulated in CRC tissues and cell lines.

Purpose of the Study:

  • To investigate the function of miR-875-5p in colorectal carcinoma development.
  • To elucidate the molecular mechanisms underlying miR-875-5p's effects on CRC.

Main Methods:

  • Assessed cell viability, colony formation, and BrdU incorporation upon ectopic miR-875-5p expression in CRC cells.
  • Analyzed apoptosis markers (cleaved caspase-3, Bcl2) and cell migration/invasion.
  • Identified and validated miR-875-5p targets, including EGFR, using molecular assays.

Main Results:

  • Ectopic miR-875-5p expression suppressed CRC cell proliferation by inhibiting cyclins (D1, D2) and CDK4, while upregulating p57 and p21.
  • miR-875-5p induced apoptosis and inhibited migration/invasion by downregulating MMP-7 and MMP-9.
  • EGFR was identified as a direct target of miR-875-5p, showing inverse correlation in CRC.

Conclusions:

  • miR-875-5p acts as a tumor suppressor in CRC by inhibiting proliferation, migration, and invasion.
  • miR-875-5p promotes apoptosis and targets oncogenic EGFR in colorectal carcinoma.
  • These findings highlight miR-875-5p as a potential therapeutic agent for CRC.
Keywords:
EGFRapoptosiscolorectal carcinoma (CRC)hsa-miRNA-875-5p (miR-875-5p)proliferation

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