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MicroRNA-503 contributes to podocyte injury via targeting E2F3 in diabetic nephropathy

Fangfang Zha1, Lin Bai2, Bo Tang1

  • 1Department of Nephrology, Qingpu Branch of Zhongshan Hospital Affiliated to Fudan University, Qingpu District, Shanghai, P. R. China.

Journal of Cellular Biochemistry
|March 6, 2019
PubMed

Insights

MicroRNA-503 (miR-503) exacerbates diabetic nephropathy by injuring podocytes. This occurs through targeting E2F transcription factor 3 (E2F3), revealing a novel pathological mechanism in diabetic kidney disease.

Area of Science:

  • Nephrology
  • Molecular Biology
  • Genetics

Background:

  • Diabetic nephropathy (DN) is a severe complication of diabetes, characterized by capillary injury and podocyte damage.
  • Podocyte injury is a key factor in the pathogenesis of DN.
  • MicroRNA-503 (miR-503) has been implicated in various diseases, including DN.

Purpose of the Study:

  • To investigate the detailed mechanism of miR-503 in podocyte injury within diabetic nephropathy.
  • To elucidate the role of the miR-503/E2F3 axis in DN progression.

Main Methods:

  • Functional studies in cultured podocytes and diabetic rat models.
  • Assessment of podocyte injury via migration and apoptosis assays.
  • Analysis of miR-503 and E2F3 expression levels and their interaction.

Main Results:

  • High glucose conditions increased miR-503 expression in podocytes in a time- and dose-dependent manner.
  • E2F transcription factor 3 (E2F3) was identified as a direct target of miR-503, with its expression negatively modulated by miR-503.
  • Downregulation of E2F3 contributed to podocyte injury, an effect reversed by miR-503 inhibitors; increased miR-503 impaired renal function in diabetic rats by targeting E2F3.

Conclusions:

  • Overexpression of miR-503 promotes podocyte injury in diabetic nephropathy by targeting E2F3.
  • The miR-503/E2F3 axis represents a significant pathological mechanism in the progression of diabetic nephropathy.
Keywords:
E2F transcription factor 3diabetic nephropathymiR-503

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