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The polymorphism in miR-25 attenuated the oncogenic function in gastric cancer

Jianping Zhou1, Jiangang Zhou1, Weimin Wang1

  • 1Department of General Surgery, Yixing People's Hospital Affiliated to Jiangsu University, Yixing, 214200, Jiangsu, China.

Tumour Biology : the Journal of the International Society for Oncodevelopmental Biology and Medicine
|November 18, 2015
PubMed

Insights

A single nucleotide polymorphism (SNP) in miR-25, rs41274221, acts as a tumor protective factor in gastric cancer (GC). This SNP may offer protection against tumor growth and metastasis, potentially serving as a novel GC biomarker.

Area of Science:

  • Oncology
  • Molecular Biology
  • Genetics

Background:

  • MicroRNA-25 (miR-25) is an established oncogene promoting gastric cancer (GC) growth and metastasis via TOB1.
  • The functional impact of single nucleotide polymorphisms (SNPs) within mature microRNAs, specifically rs41274221 in miR-25, remains largely unexplored in GC.

Purpose of the Study:

  • To investigate the role of the miR-25 SNP rs41274221 in the development and progression of gastric cancer.
  • To determine if rs41274221 influences miR-25's oncogenic functions related to tumor growth and metastasis.

Main Methods:

  • Genotyping analysis to assess the association of rs41274221 with GC occurrence.
  • Functional assays, including proliferation and invasion assays, to evaluate the impact of different genotypes on tumor cell behavior.
  • Dual-luciferase reporter assays to confirm the effect of the A allele on miR-25 binding to its target TOB1.

Main Results:

  • The miR-25 SNP rs41274221 was found to be associated with the occurrence of GC, acting as a tumor-protective factor.
  • The AA genotype of miR-25 attenuated tumor cell proliferation and invasion, counteracting the effects of wild-type miR-25.
  • The A allele of rs41274221 impaired the binding of miR-25 to TOB1, as confirmed by dual-luciferase reporter assays.

Conclusions:

  • The rs41274221 polymorphism in miR-25 may confer protection against gastric cancer progression by inhibiting tumor growth and metastasis.
  • This specific miR-25 SNP subgroup could serve as a novel diagnostic or prognostic biomarker for gastric cancer patients.
Keywords:
3′ UTRInvasionProliferationSNPmiR-25

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