The PPARδ Ligand GW501516 Reduces Growth but Not Apoptosis In Mouse Inner Medullary Collecting Duct Cells

The collecting duct (CD) expresses considerable amounts of PPARδ. While its role is unknown in the CD, in other renal cells it has been shown to regulate both growth and apoptosis. We thus hypothesized that PPARδ reduces apoptotic responses and stimulates cell growth in the mouse CD, and examined th...

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Bibliographic Details
Published in:PPAR Research 2009-01, Vol.2009 (2009), p.231-241
Main Authors: Clark, Jordan, Nasrallah, Rania, Hébert, Richard L.
Format: Article
Language:English
Subjects:
Apoptosis
Cell physiology
Cell receptors
Ligands (Biochemistry)
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Summary:The collecting duct (CD) expresses considerable amounts of PPARδ. While its role is unknown in the CD, in other renal cells it has been shown to regulate both growth and apoptosis. We thus hypothesized that PPARδ reduces apoptotic responses and stimulates cell growth in the mouse CD, and examined the effect of GW501516, a synthetic PPARδ ligand, on these responses in mouse IMCD-K2 cells. High doses of GW501516 decreased both DNA and protein synthesis in these cells by 80%, but had no overall effect on cell viability. Although anisomycin treatment resulted in an increase of caspase-3 levels of about 2.59-fold of control, GW501516 did not affect anisomycin-induced changes in active caspase-3 levels. These results show that a PPARδ ligand inhibits growth but does not affect anisomycin-apoptosis in a mouse IMCD cell line. This could have therapeutic implications for renal diseases associated with increased CD growth responses.
ISSN:1687-4757
1687-4765
DOI:10.1155/2009/706283