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• W1974953787 abstract "Previous studies have shown that hypoglycemia may reduce counterregulatory responses to subsequent hypoglycemia in healthy subjects and in patients with diabetes. The effect of hypoglycemia on the hormonal response to a nonhypoglycemic stimulus is uncertain. To test the hypothesis that the cortisol response to corticotropin (ACTH) infusion is independent of antecedent hypoglycemia, 10 healthy subjects received a standard ACTH infusion (0.25 mg Cosyntropin [Organon, West Orange, NJ] intravenously over 240 minutes) at 8:00 AM on day 1 and day 3 and a hypoglycemic insulin clamp study (1 mU/kg/min) at 8:00 AM on day 2. During the hypoglycemic clamp, plasma glucose decreased from 5.0 mmol/L to 2.8 mmol/L for two periods of 120 minutes (mean glucose, 2.9 +/- 0.03 and 2.8 +/- 0.02 mmol/L, respectively) separated by a 60-minute interval of euglycemia (mean glucose, 4.7 +/- 0.01 mmol/L). Seven subjects also had paired control studies in random order during which a 330-minute euglycemic clamp (mean glucose, 5.0 +/- 0.11 mmol/L) instead of a hypoglycemic clamp was performed on day 2. Basal ACTH (4.6 +/- 0.7 v 2.6 +/- 0.4 pmol/L, P < .02) and basal cortisol (435 +/- 46 v 317 +/- 40 nmol/L, P < .02) both decreased from day 1 to day 3 following intervening hypoglycemia. In contrast, with intervening euglycemia, neither basal ACTH (5.9 +/- 1.5 v 4.5 +/- 1.0 pmol/L) nor basal cortisol (340 +/- 38 v 318 +/- 60 nmol/L) were reduced significantly on day 3 compared with day 1. Following interval hypoglycemia, the area under the curve (AUC) for the cortisol response to successive ACTH infusions was increased (4,734 +/- 428 nmol/L over 240 minutes [day 3] v 3,526 +/- 434 nmol/L over 240 minutes [day 1], P < .01). The maximum incremental cortisol response was also significantly increased (805 +/- 63 nmol/L (day 3) v 583 +/- 58 nmol/L (day 1), P < .05). In contrast, the AUC for the cortisol response to successive ACTH infusions with interval euglycemia (3,402 +/- 345 nmol/L over 240 minutes [day 3] v 3,709 +/- 391 nmol/L over 240 minutes [day 1] and the incremental cortisol response (702 +/- 62 nmol/L [day 3] v 592 +/- 85 nmol/L [day 1] were unchanged. Following exposure to intermittent hypoglycemia in healthy humans, fasting morning ACTH and cortisol levels are reduced and the incremental cortisol response to an infusion of ACTH is enhanced. The enhanced cortisol response to exogenous ACTH infusion after intervening hypoglycemia (but not intervening euglycemia) may reflect priming of the adrenal gland by endogenous ACTH produced during the hypoglycemia. These data suggest that adrenal function testing by exogenous ACTH administration is not impaired by prior exposure to hypoglycemia. Moreover, the reduced cortisol response to recurrent hypoglycemia in patients with well-controlled diabetes is not likely the result of impaired adrenal responsiveness." @default.
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• W1974953787 date "1998-10-01" @default.
• W1974953787 modified "2023-10-16" @default.
• W1974953787 title "Recurrent hypoglycemia does not impair the cortisol response to adrenocorticotropin infusion in healthy humans" @default.
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• W1974953787 doi "https://doi.org/10.1016/s0026-0495(98)90332-8" @default.
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