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Retinoic acid regulation of mesangial cell apoptosis

Qihe Xu1, Tsuneo Konta, Masanori Kitamura

  • 1Department of Medicine, Royal Free and University College Medical School, University College London, UK.

Experimental Nephrology
|June 8, 2002
PubMed

Insights

Retinoic acid (RA) protects kidney mesangial cells from oxidant-induced apoptosis. It inhibits the c-Jun N-terminal kinase pathway, offering therapeutic potential for glomerular diseases.

Area of Science:

  • Nephrology
  • Molecular Biology
  • Cell Biology

Background:

  • Retinoic acid (RA) shows promise in treating experimental glomerular diseases.
  • The precise mechanisms behind RA's therapeutic effects remain largely unknown.
  • Previous research indicates RA can protect specific cells from injury.

Purpose of the Study:

  • To review the molecular mechanisms underlying the anti-apoptotic effects of retinoic acid (RA).
  • To summarize RA's protective role against oxidant-induced apoptosis in mesangial cells.

Main Methods:

  • Investigated the effect of RA on hydrogen peroxide-induced apoptosis in mesangial cells.
  • Examined the role of the c-Jun N-terminal kinase (JNK) activator protein 1 pathway.
  • Assessed the impact of RA on c-fos/c-jun expression and JNK activation.
  • Explored the involvement of nuclear receptor-dependent and independent pathways.
  • Identified mitogen-activated protein kinase phosphatase 1 (MKP-1) as a mediator.

Main Results:

  • RA significantly inhibits oxidant-induced apoptosis in mesangial cells.
  • RA suppresses the c-fos/c-jun pathway and JNK activation.
  • The anti-apoptotic effect is mediated by both nuclear receptor-dependent and independent mechanisms.
  • RA induces mitogen-activated protein kinase phosphatase 1 (MKP-1), contributing to its protective effect.

Conclusions:

  • Retinoic acid exhibits significant anti-apoptotic properties in mesangial cells.
  • RA's protective effects involve the modulation of key signaling pathways like JNK.
  • Understanding these mechanisms can advance RA-based therapies for glomerular diseases.

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