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  • Title: Increased triglyceride secretion rate and hyperinsulinaemia in ventromedial hypothalamic lesioned rats in vivo.
    Author: Satoh S, Inoue S, Egawa M, Takamura Y, Murase T.
    Journal: Acta Endocrinol (Copenh); 1985 Sep; 110(1):6-9. PubMed ID: 3898695.
    Abstract:
    The present study aimed to measure triglyceride secretion rate (TGSR) into the circulation in ventromedial hypothalamic (VMH) lesioned rats. Average gain of body weight in VMH lesioned rats was 72 +/- 6 g (mean +/- SE, n = 9) in a week; significantly greater than that in controls (6 +/- 2, n = 8, P less than 0.001). TGSR was determined under hexobarbital anaesthesia in fasted rats by measuring the increase in plasma concentration after the triglyceride removal mechanism was blocked by injecting Triton WR-1339. TGSR in VMH lesioned rats was 500 +/- 37 mg/dl of plasma/h; markedly higher than that in controls (239 +/- 12, P less than 0.001). Serum insulin concentration in VMH lesioned rats was 2.26 +/- 0.32 ng/ml; significantly higher than that in controls (0.83 +/- 0.08, P less than 0.001). There was a positive correlation between serum insulin concentration and TGSR in VMH lesioned rats (r = 0.709, P less than 0.05). The increased secretion rate of triglyceride in VMH lesioned rats is discussed in connection with the development of obesity in these rats.
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