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MicroRNA In situ Hybridization for Formalin Fixed Kidney Tissues
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MicroRNA In situ Hybridization for Formalin Fixed Kidney Tissues

Published on: November 30, 2013

MicroRNAs regulate renal tubule maturation through modulation of Pkd1

Vishal Patel1, Sachin Hajarnis, Darren Williams

  • 1Department of Internal Medicine/Nephrology, University of Texas Southwestern Medical Center, 5323 Harry Hines Blvd, MC 8856, Dallas, TX 75390, USA. Vishald.patel@utsouthwestern.edu

Journal of the American Society of Nephrology : JASN
|November 10, 2012
PubMed

Insights

MicroRNAs (miRNAs) are crucial for kidney tubule maturation. Loss of the Dicer enzyme in developing kidneys leads to cyst formation by upregulating the polycystic kidney disease gene Pkd1.

Area of Science:

  • Developmental Biology
  • Molecular Biology
  • Genetics

Background:

  • MicroRNAs (miRNAs) are known regulators of early kidney development.
  • Their specific roles in later renal tubule maturation remain largely unknown.

Purpose of the Study:

  • To investigate the function of miRNAs in renal tubule maturation.
  • To identify miRNA targets involved in kidney development and cystogenesis.

Main Methods:

  • Utilized mouse models with Dicer ablation in maturing renal tubules.
  • Employed bioinformatic analysis and in vitro studies using cultured renal epithelial cells.
  • Investigated the regulatory relationship between miR-200 and Pkd1.

Main Results:

  • Dicer ablation in renal tubules caused tubular and glomerular cysts.
  • This inactivation led to decreased miR-200 levels and increased Pkd1 expression.
  • miR-200 directly represses Pkd1 post-transcriptionally.
  • PKD1 overexpression disrupted tubulogenesis and induced cyst formation.

Conclusions:

  • miRNAs, specifically miR-200, are essential for renal tubule maturation.
  • Pkd1 is a direct target of miR-200, and its dysregulation contributes to cystogenesis.
  • miRNAs may influence PKD1 gene dosage and initiate polycystic kidney disease.

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