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Regulation of lipoprotein lipase. Induction by insulin

Garfinkel, A G; Nilsson-Ehle, Peter LU and Schotz, M C (1976) In Biochimica et Biophysica Acta 424(2). p.264-273
Abstract
Lipoprotein lipase activity in intact epididymal adipose tissue of fasted rats increased rapidly after treatment with insulin in vivo. In contrast, lipoprotein lipase activity in adipocytes isolated from the contralateral fat pads remained essentially unchanged. When adipocytes were incubated for 30 min at ambient temperature in vitro, about 2 times more lipoprotein lipase activity was found in the medium of cells from insulin-treated rats than in medium from cells of control animals. Following insulin treatment, extracts of tissue acetone powders separated by gel chromatography showed increases in both enzyme activity fractions obtained (designated lipoprotein lipase a and b). However, no consistent differences were observed between... (More)
Lipoprotein lipase activity in intact epididymal adipose tissue of fasted rats increased rapidly after treatment with insulin in vivo. In contrast, lipoprotein lipase activity in adipocytes isolated from the contralateral fat pads remained essentially unchanged. When adipocytes were incubated for 30 min at ambient temperature in vitro, about 2 times more lipoprotein lipase activity was found in the medium of cells from insulin-treated rats than in medium from cells of control animals. Following insulin treatment, extracts of tissue acetone powders separated by gel chromatography showed increases in both enzyme activity fractions obtained (designated lipoprotein lipase a and b). However, no consistent differences were observed between fractions derived from adipocyte acetone powders of insulin-treated and control animals. All the observed effects of insulin on lipoprotein lipase activity were abolished by cycloheximide treatment in vivo. These data indicate that following insulin treatment, increased lipoprotein lipase activity in adipose tissue results from enhanced enzyme secretion by the fat cell and subsequent accumulation in the tissue, thus implicating the adipocyte secretory mechanism as a major site of regulation of lipoprotein lipase activity in adipose tissue. (Less)
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organization
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type
Contribution to journal
publication status
published
subject
in
Biochimica et Biophysica Acta
volume
424
issue
2
pages
264 - 273
publisher
Elsevier
external identifiers
  • pmid:1252491
  • scopus:0017285638
ISSN
0006-3002
language
English
LU publication?
yes
id
d79324d4-f9af-466c-b5f7-3833ebc472a3 (old id 1102628)
date added to LUP
2008-08-14 11:54:09
date last changed
2017-08-06 04:28:39
@article{d79324d4-f9af-466c-b5f7-3833ebc472a3,
  abstract     = {Lipoprotein lipase activity in intact epididymal adipose tissue of fasted rats increased rapidly after treatment with insulin in vivo. In contrast, lipoprotein lipase activity in adipocytes isolated from the contralateral fat pads remained essentially unchanged. When adipocytes were incubated for 30 min at ambient temperature in vitro, about 2 times more lipoprotein lipase activity was found in the medium of cells from insulin-treated rats than in medium from cells of control animals. Following insulin treatment, extracts of tissue acetone powders separated by gel chromatography showed increases in both enzyme activity fractions obtained (designated lipoprotein lipase a and b). However, no consistent differences were observed between fractions derived from adipocyte acetone powders of insulin-treated and control animals. All the observed effects of insulin on lipoprotein lipase activity were abolished by cycloheximide treatment in vivo. These data indicate that following insulin treatment, increased lipoprotein lipase activity in adipose tissue results from enhanced enzyme secretion by the fat cell and subsequent accumulation in the tissue, thus implicating the adipocyte secretory mechanism as a major site of regulation of lipoprotein lipase activity in adipose tissue.},
  author       = {Garfinkel, A G and Nilsson-Ehle, Peter and Schotz, M C},
  issn         = {0006-3002},
  language     = {eng},
  number       = {2},
  pages        = {264--273},
  publisher    = {Elsevier},
  series       = {Biochimica et Biophysica Acta},
  title        = {Regulation of lipoprotein lipase. Induction by insulin},
  volume       = {424},
  year         = {1976},
}