7 Citations (Scopus)

Abstract

Urotensin II (UII) is a cyclic vasoactive peptide which is mainly expressed in kidneys. Although elevated plasma UII levels are associated with renal impairment, the influence of UII on renal injury is unclear. In this study, we monitored the influence of UII on gentamicin-induced apoptosis in rat tubular cells (NRK-52E). We found that UII significantly reduced gentamicin-induced apoptosis and apoptotic signals. Blocking endogenous UII secretion caused cells to be more susceptible to gentamicin. In gentamicin-treated mice, UII also expressed protective effect on renal tubular cells. UII was also found to induce prostacyclin (PGI2) production, which caused peroxisomal proliferator-activated receptor α (PPARα) activation as revealed by both PGI2 synthase siRNA transfection and piroxicam treatment. Blockage of PPARα by siRNA transfection inhibited UII-induced Akt phosphorylation and the antiapoptotic effect of UII. Our results suggest that UII can protect renal tubular cells from gentamicin-induced apoptosis through PGI2-mediated PPARα and Akt activation.

Original languageEnglish
Pages (from-to)168-174
Number of pages7
JournalMolecular and Cellular Endocrinology
Volume381
Issue number1-2
DOIs
Publication statusPublished - Dec 5 2013

    Fingerprint

Keywords

  • Akt
  • Apoptosis
  • Peroxisome proliferator-activated receptor alpha (PPARα)
  • Prostacyclin
  • Urotensin II

ASJC Scopus subject areas

  • Endocrinology
  • Molecular Biology
  • Biochemistry

Cite this