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  • Title: Chemical sympathectomy and diurnal fluctuations of noradrenaline calorigenic action in the rat.
    Author: Petrović VM, Maksimović K, Davidović V.
    Journal: Arch Int Physiol Biochim; 1980 Aug; 88(3):273-6. PubMed ID: 6159854.
    Abstract:
    In the rat, in which a diurnal fluctuation of the sensitivity to noradrenaline was previously found, the effect of injected 6-hydroxydopamine (6-OHDA) was investigated. The heat production and catecholamines contents in the interscapular brown adipose tissue, heart and adrenals were measured. Chemical sympathectomy induces a disappearance of diurnal fluctuation in the sensitivity to injected noradrenaline. In these animals a lower capacity for heat production was found. However, a significant calorigenic effect of injected noradrenaline in 6-OHDA-treated animals was still present. In sympathectomized animals a depletion of noradrenaline from interscapular brown adipose tissue and the heart was observed. Besides, a change in adrenaline/noradrenaline ratio was found in the adrenals.
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