Abstract
Thiazolidinediones (TZDs) are widely used to treat type 2 diabetes mellitus; however, their use is complicated by systemic fluid retention. Along the nephron, the pharmacological target of TZDs, peroxisome proliferator- activated receptor-γ (PPARγ, encoded by Pparg), is most abundant in the collecting duct. Here we show that mice treated with TZDs experience early weight gain from increased total body water. Weight gain was blocked by the collecting duct-specific diuretic amiloride and was also prevented by deletion of Pparg from the collecting duct, using Ppargflox/flox mice. Deletion of collecting duct Pparg decreased renal Na+ avidity and increased plasma aldosterone. Treating cultured collecting ducts with TZDs increased amiloride-sensitive Na+ absorption and Scnn1g mRNA (encoding the epithelial Na+ channel ENaCγ) expression through a PPARγ-dependent pathway. These studies identify Scnn1g as a PPARγ target gene in the collecting duct. Activation of this pathway mediates fluid retention associated with TZDs, and suggests amiloride might provide a specific therapy.
| Original language | English |
|---|---|
| Pages (from-to) | 861-866 |
| Number of pages | 6 |
| Journal | Nature Medicine |
| Volume | 11 |
| Issue number | 8 |
| DOIs | |
| Publication status | Published - 2005 Aug |
| Externally published | Yes |
Bibliographical note
Funding Information:We thank R. Zent for his critical reading of this manuscript and his comments. These studies were supported by the National Institute of Diabetes & Digestive & Kidney Disease grants DK37097 (to M.D.B.) and DK38226 (to J. Capdevila and M.D.B.), a US National Institutes of Health RO1 DK65074-01 to Y.G., an American Heart Association grant 160200B (to Y.G.) and a Genzyme renal innovative Award (to Y.G.). NMR fat determinations were performed through the Vanderbilt Mouse Metabolic Phenotyping Center (grant DK59637).
UN SDGs
This output contributes to the following UN Sustainable Development Goals (SDGs)
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SDG 3 Good Health and Well-being
ASJC Scopus subject areas
- General Biochemistry,Genetics and Molecular Biology
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