Effects of adrenaline on the turnover of lipoprotein lipase in rat adipose tissue

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Abstract

The mechanisms by which adrenaline brings about a reduction in the lipoprotein lipase activity of adipose tissue in vitro were investigated. The incorporation of [3C]leucine into lipoprotein lipase was measured during 1-h pulse incubations of rat epididymal fat bodies that had been preincubated for 4 h in the presence of glucose, insulin and dexamethasone. When adrenaline was added to the incubation medium at the start of the pulse, the incorporation of [3H]leucine was markedly reduced, suggesting that the rate of the enzyme's synthesis had decreased. On the other hand, the degradation of lipoprotein lipase, as measured by the loss of 3H-labelled enzyme protein during pulse-chase incubations of the epididymal fat bodies, was found to be significantly increased by the addition of adrenaline to the incubation medium at the start of the chase period. It is concluded that adrenaline is able both to inhibit the synthesis of lipoprotein lipase and to stimulate its degradation.

References (36)

  • B.K. Speake et al.

    Biochim. Biophys. Acta

    (1985)
  • R.J. Mans et al.

    Arch. Biochem. Biophys.

    (1961)
  • R.L. Patten

    J. Biol. Chem.

    (1970)
  • E.A. Nikkila et al.

    Life Sci.

    (1968)
  • P.J. Nestel et al.

    Life Sci.

    (1969)
  • T. Noguchi et al.

    J. Biol. Chem.

    (1982)
  • P.B. Iynedjian et al.

    J. Biol. Chem.

    (1977)
  • E.G. Beale et al.

    J. Biol. Chem.

    (1982)
  • G.L. Firestone et al.

    J. Biol. Chem.

    (1981)
  • M.F. Miles et al.

    J. Biol. Chem.

    (1981)
  • W. Sibrowski et al.

    J. Biol. Chem.

    (1984)
  • A. Munnich et al.

    J. Biol. Chem.

    (1984)
  • T.A. Pry et al.

    Biochem. Biophys. Res. Commun.

    (1981)
  • A. Wynshaw-Boris et al.

    J. Biol. Chem.

    (1984)
  • C. Vannier et al.

    J. Biol. Chem.

    (1985)
  • G. Friedman et al.

    Biochim. Biophys. Acta

    (1982)
  • D.S. Robinson

    Comp. Biochem.

    (1970)
  • P. Nilsson-Ehle et al.

    Annu. Rev. Biochem.

    (1980)
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