Age-associated differences in beta adrenergic-stimulated lipolysis in adipocytes from Sprague-Dawley and Fischer 344 rats.

Published

Journal Article

We compared the ability of adipocytes isolated from the epididymal fat pads of Sprague-Dawley and Fischer 344 rats of different ages and weights to release glycerol in response to beta-adrenergic stimulation. Twelve-month-old Sprague-Dawley rats weighed approximately three times more than did 2-month-old rats of the same strain (761 +/- 61 g vs 223 +/- 8 g, p less than .001). Basal glycerol release was increased in the adipocytes of the 12-month-old rats (128 +/- 8 nmol/10(5) cells/L compared to the 2-month-old rats 51 +/- 3 nmol/10(5) cells/L). However, the ability of isoproterenol to stimulate glycerol release above basal was markedly decreased in the older and fatter Sprague-Dawley rats (178 +/- 15 nmol/10(5) cells/L vs 482 +/- 20 nmol/10(5) cells/L, p less than .001), and significant correlation coefficients between isoproterenol-stimulated glycerol release and both total body (r = .76, p less than .001) and fat pad (r = .83, p less than .001) weight were seen in Sprague-Dawley rats. Total body weights of 2-month (188 +/- 16 g), 12-month (393 +/- 15 g), and 27-month-old (402 +/- 36 g) Fischer 344 rats were less disparate. Isoproterenol-stimulated glycerol release was similar in the three groups of Fischer 344 rats, and there was no correlation between either total body or fat pad weight and lipolysis in these rats.

Full Text

Duke Authors

Cited Authors

  • Twersky, J; Hoffman, BB; Reaven, GM

Published Date

  • July 1991

Published In

Volume / Issue

  • 46 / 4

Start / End Page

  • B125 - B129

PubMed ID

  • 2071826

Pubmed Central ID

  • 2071826

International Standard Serial Number (ISSN)

  • 0022-1422

Digital Object Identifier (DOI)

  • 10.1093/geronj/46.4.b125

Language

  • eng

Conference Location

  • United States