Dab1 Contributes to Angiotensin II-Induced Apoptosis via p38 Signaling Pathway in Podocytes

Biomed Res Int. 2017:2017:2484303. doi: 10.1155/2017/2484303. Epub 2017 Jun 5.

Abstract

Numerous studies have found that angiotensin II (Ang II) participates in podocyte apoptosis and exacerbates progression of end-stage kidney disease (ESKD). However, its underlying mechanism remains largely unexplored. As a homolog of Drosophila disabled (Dab) protein, Dab1 plays a vital role in cytoskeleton, neuronal migration, and proliferation. In the present study, our data revealed that Ang II-infused rats developed hypertension, proteinuria, and podocyte injury accompanied by Dab1 phosphorylation and increased reelin expression in kidney. Moreover, Ang II induced podocyte apoptosis in vitro. Dab1 phosphorylation and reelin expression in podocytes were increased after exposure to Ang II. Conversely, Dab1 small interfering RNA (siRNA) exerted protective effects on Ang II-induced podocyte apoptosis, resulting in decreased p38 phosphorylation and reelin expression. These results indicated that Dab1 mediated Ang II-induced podocyte apoptosis via p38 signaling pathway.

MeSH terms

  • Adaptor Proteins, Signal Transducing / metabolism*
  • Angiotensin II / pharmacology*
  • Animals
  • Apoptosis / drug effects*
  • MAP Kinase Signaling System / drug effects*
  • Male
  • Nerve Tissue Proteins / metabolism*
  • Podocytes / metabolism*
  • Podocytes / pathology
  • Rats
  • Rats, Sprague-Dawley
  • Reelin Protein
  • p38 Mitogen-Activated Protein Kinases / metabolism*

Substances

  • Adaptor Proteins, Signal Transducing
  • Dab1 protein, rat
  • Nerve Tissue Proteins
  • Reelin Protein
  • Reln protein, rat
  • Angiotensin II
  • p38 Mitogen-Activated Protein Kinases