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Am J Physiol Regul Integr Comp Physiol 261: R875-R881, 1991;
0363-6119/91 $5.00
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AJP - Regulatory, Integrative and Comparative Physiology, Vol 261, Issue 4 875-R881, Copyright © 1991 by American Physiological Society

ARTICLES

Adrenal sympathetic nerve activity in response to hypothalamic injections of 2-deoxy-D-glucose

H. Yoshimatsu, M. Egawa and G. A. Bray
Department of Medicine, University of Southern California School of Medicine, Los Angeles 90033.

Adrenal sympathetic nerve activity after microinfusion of 2-deoxy-D-glucose (2-DG) into various hypothalamic nuclei was investigated in anesthetized rats. Infusion of 2-DG into the ventrolateral portion of the lateral hypothalamic area (LHA) induced a large and long-lasting increase (greater than 60 min) in adrenal nerve activity. In contrast, infusion into the dorsal or medial portion of the LHA tended to produce a small decrease with a return to baseline within approximately 60 min after the end of the infusion. The direct administration of 2-DG into either the paraventricular nucleus or the dorsomedial hypothalamic nucleus produced a strong inhibition of adrenal nerve activity. Infusions into the ventromedial hypothalamic nucleus induced either a decrease of adrenal nerve activity or were without effect. These findings provide evidence that induction of glucoprivation in the hypothalamus with 2-DG can excite or inhibit adrenal nerve activity, depending on the hypothalamic region. These data also indicate that the ventrolateral portion of the LHA plays an important role in the regulation of adrenal catecholamine secretion in response to glucoprivic conditions in the central nervous system.


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