alexa Nephrotoxic cell death by diclofenac and meloxicam
Geology & Earth Science

Geology & Earth Science

Journal of Geography & Natural Disasters

Author(s): Ng LE, Halliwell B, Wong KP

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The nephrotoxicity of diclofenac, a non-steroidal anti-inflammatory drug that inhibits both isoforms of cyclooxygenase (COX) has been reported to be fatal to vultures but this was not so with meloxicam which is COX-2 selective. Our study showed that diclofenac was more toxic than meloxicam to both the proximal tubular LLC-PK1 cells and the distal tubular Madin-Darby canine kidney type II (MDCKII) cells, and that LLC-PK1 cells were more susceptible. Exposure of MDCKII cells to meloxicam caused activation of caspase-9/-3 and release of cytochrome c. These observations together with a positive annexin V-FITC staining implicate an intrinsic mitochondrial cell death pathway by apoptosis. Diclofenac-treated MDCKII cells on the other hand showed extensive propidium iodide staining, suggestive of cell death by necrosis. The mode of cell death in LLC-PK1 cells was however less well-defined with positive annexin V-FITC staining but minimal increase in caspase-3 activity alluding to a caspase-independent pathway.

This article was published in Biochem Biophys Res Commun and referenced in Journal of Geography & Natural Disasters

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