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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Elevated cytosolic calcium of adipocytes in chronic renal failure.

Chronic renal failure (CRF) is associated with increased calcium content of, and impaired lipase release from lipid cells. This has been attributed to a rise in the cytosolic calcium ([Ca2+]i) of these cells. However, data on [Ca2+]i of lipid cells in CRF and on the mechanisms responsible for such an abnormality are lacking. To study this issue we examined the [Ca2+]i and ATP content of lipid cells and Vmax of Na(+)-K(+)-ATPase and Ca2+ ATPase of membrane preparation and Na(+)-Ca2+ exchange of membrane vesicles of adipocytes from normal rats, 6 week CRF, CRF normocalcemic parathyroidectomized (CRF-PTX) and CRF, and normal rats treated with verpamil (CRF-V, normal-V). [Ca2+]i in adipocytes of CRF rats was higher (199 +/- 8.5 nM) and ATP lower (2.9 +/- 0.31 nmol/10(6) cells) than in normal (120 +/- 4.3 nM; 5.7 +/- 0.27 nmol/10(6) cells), CRF-PTX (128 +/- 4.7 nM; 5.8 +/- 0.39 nmol/10(6) cells), normal-V (121 +/- 3.2 nM; 5.3 +/- 0.36 nmol/10(6) cells), CRF-V (123 +/- 7.4 nM; 5.5 +/- 0.30 mmol/10(6) cells). Vmax Ca2+ ATPase and the activity of Na(+)-K(+)-ATPase and of Na(+)-Ca2+ exchanger were reduced in CRF rats as compared to the other four groups of rats. The values in normal, CRF-PTX, CRF-V and normal-V rats were not different.(ABSTRACT TRUNCATED AT 250 WORDS)[1]


  1. Elevated cytosolic calcium of adipocytes in chronic renal failure. Ni, Z., Smogorzewski, M., Massry, S.G. Kidney Int. (1995) [Pubmed]
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