Inhibitory Role of Prolactin in Brown Adipose Tissue Thermogenic Activity.
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概要
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To evaluate the role of prolactin (PRL) in nonshivering thermogenesis (NST), the effects of hyper- and hypo-prolactinemia on <I>in vitro</I> brown adipose tissue (BAT) thermogenesis were investigated. In male rats cold-exposure for 1 hr or 1 day decreased plasma PRL levels, but after cold-acclimation the levels returned to the warm-acclimated control values. Saline injection elevated the plasma PRL level and this elevation was blocked by noradrenaline (NA) . In female animals haloperidol-treatment suppressed, while bromocriptine-treatment enhanced the <I>in vitro</I> responsiveness of BAT to glucagon (G), but not to NA. Dopamine mimicked the responses of BAT to bromocriptine. PRL may inhibit nonshivering thermogenesis, especially by modifying the thermogenic action of G in BAT.
- 日本生気象学会の論文
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