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MicroRNA-134 functions as a tumor suppressor gene in gastric cancer

Ze-An Qiu1, Guo-Ping He2

  • 1Nursing School, Central South UniversityNo. 172 Tongzipo Road, Yuelu District, Changsha 410013, Hunan Province, China; Guiyang Nursing Vocational CollegeNo. 2 Stone Forest Road, Mountain Lakes District, Guiyang 550023, Guizhou Province, China.

American Journal of Translational Research
|November 11, 2016
PubMed

Insights

MicroRNA-134 (miR-134) acts as a tumor suppressor in gastric cancer by inhibiting KRAS. Upregulating miR-134 increases sensitivity to 5-fluorouracil (5-FU) chemotherapy, suggesting a potential combination therapy.

Area of Science:

  • Molecular Biology
  • Oncology
  • Genetics

Background:

  • MicroRNA-134 (miR-134) has dual roles as an oncogene or tumor suppressor, but its function in gastric cancer is not well understood.
  • The role of miR-134 in gastric cancer development and its impact on chemotherapy sensitivity require further investigation.

Purpose of the Study:

  • To elucidate the function of miR-134 in gastric cancer.
  • To determine the effect of miR-134 on the sensitivity of gastric cancer cells to 5-fluorouracil (5-FU).

Main Methods:

  • Quantitative real-time PCR was used to assess miR-134 expression levels in gastric cancer tissues.
  • In vivo studies were conducted to evaluate the effects of miR-134 overexpression on tumor growth and apoptosis.
  • The molecular target of miR-134 was identified as KRAS.

Main Results:

  • miR-134 expression was significantly downregulated in gastric cancer tissues compared to noncancerous tissues.
  • Overexpression of miR-134 suppressed gastric cancer cell proliferation and growth in vivo.
  • miR-134 overexpression promoted apoptosis in gastric cancer cells by targeting KRAS.
  • Upregulation of miR-134 enhanced the sensitivity of gastric cancer cells to 5-FU.

Conclusions:

  • miR-134 functions as a tumor suppressor in gastric cancer by targeting KRAS.
  • miR-134 enhances the sensitivity of gastric cancer cells to 5-FU, indicating its potential as a therapeutic target.
  • Combining 5-FU with miR-134 may represent a promising strategy for gastric cancer treatment.
Keywords:
5-FUKRASgastric cancermiR-134

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