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Apoptosis in cultured renal epithelial cells caused by ochratoxin A

G Schwerdt1, R Freudinger, C Schuster

  • 1Physiologisches Institut, Universität Würzburg, Röntgenring 9, 97070, Würzburg, Germany.

Mycotoxin Research
|April 23, 2013
PubMed

Insights

Ochratoxin A (OTA) induces apoptosis in kidney cells by activating caspase 3. This process requires intact mitochondria, as inhibiting mitochondrial ATP/ADP carriers prevents OTA-induced cell death.

Area of Science:

  • Nephrology
  • Toxicology
  • Cell Biology

Background:

  • Ochratoxin A (OTA) is a mycotoxin that can cause kidney damage.
  • Apoptosis is programmed cell death, a critical process in maintaining tissue homeostasis.

Purpose of the Study:

  • To investigate the mechanism of apoptosis induction in renal epithelial cells by Ochratoxin A (OTA).
  • To determine the role of mitochondria in OTA-induced apoptosis.

Main Methods:

  • Exposure of renal epithelial cells to varying concentrations of OTA.
  • Assay for caspase 3 activation.
  • Analysis of chromatin condensation and DNA ladder formation.
  • Inhibition of mitochondrial ATP/ADP carrier.

Main Results:

  • Nanomolar concentrations of OTA induced caspase 3 activation, chromatin condensation, and DNA ladder formation.
  • These effects are characteristic of apoptosis.
  • Inhibiting the mitochondrial ATP/ADP carrier blocked OTA-induced caspase activation.
  • Intact mitochondria are essential for OTA-induced apoptosis.

Conclusions:

  • Ochratoxin A triggers apoptosis in renal epithelial cells.
  • Mitochondrial integrity is crucial for the apoptotic pathway initiated by OTA.

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