miR-513a-5p targets Bcl-2 to promote dichlorvos induced apoptosis in HK-2 cells

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Published on: October 5, 2012

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Sheng Li1, Ya-Nan Xu2, Xi Niu1

  • 1Key laboratory of Plant Resource Conservation and Germplasm Innovation in Mountainous Region (Ministry of Education), Collaborative Innovation Center for Mountain Ecology & Agro-Bioengineering (CICMEAB), Institute of Agro-bioengineering/College of Life Sciences, Guizhou University, Guiyang 550025, Guizhou, China; Guizhou Tobacco Research Institute, Guiyang 550081, Guizhou, China.

Biomedicine & Pharmacotherapy = Biomedecine & Pharmacotherapie
|October 31, 2018
PubMed

Insights

MicroRNAs (miRNAs) play a role in cellular responses to toxins. This study shows that miR-513a-5p promotes dichlorvos-induced apoptosis in kidney cells by targeting the Bcl-2 gene.

Area of Science:

  • Toxicology
  • Molecular Biology
  • Cell Biology

Background:

  • MicroRNAs (miRNAs) are critical regulators of cellular processes.
  • The role of miRNAs in organophosphate-induced cytotoxicity remains unclear.
  • Organophosphate pesticides, like dichlorvos, pose significant health risks.

Purpose of the Study:

  • To investigate the role of miR-513a-5p in dichlorvos-induced cytotoxicity in human kidney HK-2 cells.
  • To elucidate the molecular mechanism by which miR-513a-5p mediates dichlorvos toxicity.

Main Methods:

  • Cell culture of human kidney HK-2 cells.
  • Dichlorvos exposure to induce cytotoxicity.
  • Quantitative real-time PCR to measure miR-513a-5p expression.
  • Apoptosis assays (e.g., flow cytometry).
  • Luciferase reporter assay to confirm target binding.
  • Western blotting to assess protein levels (Bcl-2, Bax, Caspase-3).

Main Results:

  • Dichlorvos exposure increased reactive oxygen species (ROS) and induced apoptosis in HK-2 cells.
  • miR-513a-5p expression was upregulated by dichlorvos.
  • Overexpression of miR-513a-5p enhanced apoptosis, while inhibition partially blocked dichlorvos-induced apoptosis.
  • miR-513a-5p directly targets the 3'-UTR of Bcl-2 mRNA.
  • miR-513a-5p reduced Bcl-2 protein levels, leading to activation of the Bax-Caspase-3 pathway.

Conclusions:

  • miR-513a-5p is a key mediator of dichlorvos-induced apoptosis in human kidney cells.
  • The mechanism involves the downregulation of Bcl-2 and subsequent activation of the intrinsic apoptotic pathway.
  • These findings highlight miR-513a-5p as a potential therapeutic target for organophosphate poisoning.
Keywords:
ApoptosisBcl-2CytotoxicityDichlorvosmiR-513a-5p

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