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  • Title: Zucker and Wistar diabetic fatty rats show different response to adrenalectomy.
    Author: Turkenkopf IJ, Kava RA, Feldweg A, Horowitz C, Greenwood MR, Johnson PR.
    Journal: Am J Physiol; 1991 Oct; 261(4 Pt 2):R912-9. PubMed ID: 1928436.
    Abstract:
    The short-term effects of adrenalectomy on certain aspects of glucose homeostasis and adiposity were examined in Zucker and Wistar diabetic fatty (WDF) rats. Ten-week-old male obese and lean WDF and Zucker rats were adrenalectomized or underwent sham operation. Obese rats of each strain were pair fed the intake of obese adrenalectomized rats. Intragastric glucose tolerance tests showed that sham-operated obese rats of both strains were severely hyperinsulinemic compared with leans; adrenalectomy and pair feeding reduced palsma insulin to lean levels in Zucker but not WDF rats. At the time they were killed, sham-operated obese WDF rats were significantly hyperglycemic and hyperinsulinemic compared with other groups, but adrenalectomy reduced plasma glucose and insulin to lean levels in both strains. Adrenalectomy reduced inguinal and retroperitoneal fat pad weights more in Zucker than WDF obese rats. Although adrenalectomy decreased epididymal and inguinal fat cell size in both obese rat strains, the effect was greater in Zucker compared with WDF rats. These data suggest that the basis for the differential response to adrenalectomy in obese WDF and Zucker rats may reside in their different genetic backgrounds.
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