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• W2050201358 abstract "In the present study we examined the mechanisms involved in the activation of the hypothalamo-pituitary-adrenal (HPA) axis after administration of the glucose analog 2-deoxyglucose (2-DG), which inhibits intracellular glucose use. Adult male rats were injected with either 2-DG (400 mg/kg body wt ip) or vehicle and were killed 60 min later. 2-DG increased serum ACTH and corticosterone (CS) by 3- and 7-fold, respectively, as compared to vehicle-treated rats. Bilateral lesions of the lateral hypothalamic area completely inhibited the 2-DG-induced HPA axis activation. Administration of 2-DG caused a significant depletion in the CRF-41 content of the median eminence (ME). Pretreatment with dexamethasone (80 micrograms/kg body wt ip) inhibited the 2-DG-induced depletion of ME CRF-41 and the increase in serum ACTH and CS. To investigate the role of type I and type II corticosteroid receptors in mediating the feedback effect of endogenous glucocorticoids on the responses to 2-DG, specific type I (RU-28318) or type II (RU-38486) receptor antagonists were injected intracerebroventricularly (icv) (1 microgram/kg body wt). In rats pretreated with these antagonists, the recovery of serum ACTH and CS to basal levels after 2-DG was markedly inhibited. Injection of the serotonin (5-HT) neurotoxin, 5,7-dihydroxy-tryptamine, either into the raphe nuclei or icv, which caused a 50 and 70% depletion of the hypothalamic 5-HT content, respectively, did not affect the HPA axis responses to 2-DG. In contrast, icv injection of ketanserin, a 5-HT2 receptor antagonist, completely inhibited the 2-DG-induced activation of the HPA axis. The results suggest that: 1) the lateral hypothalamic area is involved in the mediation of the HPA axis responses to 2-DG; 2) CRF-41 released from the ME plays a dynamic role in mediating the 2-DG-induced adrenocortical response; 3) the effect of 2-DG is sensitive to inhibition by dexamethasone, and the feedback effect exerted by endogenous glucocorticoids is mediated by both type I and type II corticosteroid receptors; and 4) 5-HT is involved in the activation of the HPA axis after 2-DG via its interactions with 5-HT2 receptors." @default.
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• W2050201358 date "1994-04-01" @default.
• W2050201358 modified "2023-10-18" @default.
• W2050201358 title "Characterization of the 2-deoxyglucose effect on the adrenocortical axis." @default.
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• W2050201358 doi "https://doi.org/10.1210/endo.134.4.8137760" @default.
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