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

Publication ,  Journal Article
Twersky, J; Hoffman, BB; Reaven, GM
Published in: J Gerontol
July 1991

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.

Duke Scholars

Published In

J Gerontol

DOI

ISSN

0022-1422

Publication Date

July 1991

Volume

46

Issue

4

Start / End Page

B125 / B129

Location

United States

Related Subject Headings

  • Rats, Inbred Strains
  • Rats, Inbred F344
  • Rats
  • Male
  • Lipolysis
  • Isoproterenol
  • In Vitro Techniques
  • Glycerol
  • Body Weight
  • Animals
 

Citation

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Twersky, J., Hoffman, B. B., & Reaven, G. M. (1991). Age-associated differences in beta adrenergic-stimulated lipolysis in adipocytes from Sprague-Dawley and Fischer 344 rats. J Gerontol, 46(4), B125–B129. https://doi.org/10.1093/geronj/46.4.b125
Twersky, J., B. B. Hoffman, and G. M. Reaven. “Age-associated differences in beta adrenergic-stimulated lipolysis in adipocytes from Sprague-Dawley and Fischer 344 rats.J Gerontol 46, no. 4 (July 1991): B125–29. https://doi.org/10.1093/geronj/46.4.b125.
Twersky, J., et al. “Age-associated differences in beta adrenergic-stimulated lipolysis in adipocytes from Sprague-Dawley and Fischer 344 rats.J Gerontol, vol. 46, no. 4, July 1991, pp. B125–29. Pubmed, doi:10.1093/geronj/46.4.b125.

Published In

J Gerontol

DOI

ISSN

0022-1422

Publication Date

July 1991

Volume

46

Issue

4

Start / End Page

B125 / B129

Location

United States

Related Subject Headings

  • Rats, Inbred Strains
  • Rats, Inbred F344
  • Rats
  • Male
  • Lipolysis
  • Isoproterenol
  • In Vitro Techniques
  • Glycerol
  • Body Weight
  • Animals