Objective To evaluate the impact of beta-adrenergic blockade in spontaneously hypertensive rats (SHR) and in their normotensive controls, Wistar-Kyoto (WKY) rats, on whole-body glucose disposal under metabolic steady state conditions, in unrestrained and conscious animals, Method SHR (n = 13) and WKY rats (n = 12) underwent a 240 min insulinaemic clamp study with or without a superinfusion (120th to 240th minutes; second step) of propranolol. Results From 0 to 120 min (the first step) SHR showed significantly increased glucose uptake, muscle glycogen synthesis and glycogen synthase activity compared with WKY rats, When propranolol was superinfused, glucose uptake and muscle glycogen synthesis in SHR returned to levels similar to those observed in WKY rats during the first step, No significant differences were found for whole-body glycolysis in SHR and WKY in the first and second steps. Conclusion Hypertensive rats display an increased insulin sensitivity compared with controls, beta-Blockade is associated with a reduction in overall glucose metabolism in SHR, but not in WKY rats.

Farrace, S., Frontoni, S., Gambardella, S., Menzinger, G., Rossetti, L. (1996). Effects of beta-adrenergic blockade on insulin-mediated glucose disposal in hypertensive and normotensive rats. JOURNAL OF HYPERTENSION, 14(9), 1087-1092.

Effects of beta-adrenergic blockade on insulin-mediated glucose disposal in hypertensive and normotensive rats

FRONTONI, SIMONA;GAMBARDELLA, SERGIO;
1996-01-01

Abstract

Objective To evaluate the impact of beta-adrenergic blockade in spontaneously hypertensive rats (SHR) and in their normotensive controls, Wistar-Kyoto (WKY) rats, on whole-body glucose disposal under metabolic steady state conditions, in unrestrained and conscious animals, Method SHR (n = 13) and WKY rats (n = 12) underwent a 240 min insulinaemic clamp study with or without a superinfusion (120th to 240th minutes; second step) of propranolol. Results From 0 to 120 min (the first step) SHR showed significantly increased glucose uptake, muscle glycogen synthesis and glycogen synthase activity compared with WKY rats, When propranolol was superinfused, glucose uptake and muscle glycogen synthesis in SHR returned to levels similar to those observed in WKY rats during the first step, No significant differences were found for whole-body glycolysis in SHR and WKY in the first and second steps. Conclusion Hypertensive rats display an increased insulin sensitivity compared with controls, beta-Blockade is associated with a reduction in overall glucose metabolism in SHR, but not in WKY rats.
Pubblicato
Rilevanza internazionale
Articolo
Sì, ma tipo non specificato
Settore MED/13 - Endocrinologia
English
spontaneously hypertensive rat; insulin resistance; hypertension; glycogen synthase; beta-adrenergic receptor
Farrace, S., Frontoni, S., Gambardella, S., Menzinger, G., Rossetti, L. (1996). Effects of beta-adrenergic blockade on insulin-mediated glucose disposal in hypertensive and normotensive rats. JOURNAL OF HYPERTENSION, 14(9), 1087-1092.
Farrace, S; Frontoni, S; Gambardella, S; Menzinger, G; Rossetti, L
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/50469
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