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• W2034155854 abstract "The influence of steroids on the exocrine pancreas of male rats was examined by removing steroid producing tissue and by introducing individual steroids into these animals at a later date. Castration had no demonstrable morphological effect on acinar cells, whereas castration combined with adrenalectomy caused a marked depletion of zymogen granules as well as widening of peri- and interlobular spaces. Treatment of castrated-adrenalectomized rats with estradiol restored a normal appearance of the pancreas within about 9 h. Triamcinolone acetonide produced similar results. These morphological changes were accompanied by significant alterations of the relative amounts of digestive enzymes present in zymogen granules. A marked reduction of amylase occurred in the castrated-adrenalectomized group. Neither estradiol nor triamcinolone could reverse these effects within 9 h. Castration alone had no significant effect on the relative proportion of amylase; however, it increased the relative amount of proteases. This effect was reversed by estradiol treatment. Estradiol also induced significant changes in the proportion of proelastase in castrated-adrenalectomized animals. Replacement therapy in castrated-adrenalectomized rats with dexamethasone or triamcinolone partially restored the level of amylase in the pancreas, whereas estradiol did not cause any significant effect. At the ultrastructural level, castration and adrenalectomy caused swelling of the Golgi apparatus and accumulation of condensing vacuoles. These effects were reversed by either estradiol or triamcinolone. Also, after acute treatment of these animals with estradiol, two unusual features of acini were noted. In some acini, a type of granule that we termed halo granule appeared. These halo granules were either distinctly separated organelles or formed composite structures that did not appear to be associated with the luminal membrane. Freeze-fracture studies revealed that secretory vesicles in apparently normal acini adhered to each other at specific contact sites characterized by aggregates of intramembrane particles. Multiple sites of contact could be seen in the same vesicle. From our observations it is clear that steroids from the testes and adrenals exert major effects on the secretory apparatus of pancreas; more specifically on the mechanisms that determine the proportions of the different digestive enzyme and on their packaging in the zymogen granules." @default.
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• W2034155854 date "1986-11-01" @default.
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• W2034155854 title "Steroids and the Secretory Function of the Exocrine Pancreas*" @default.
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• W2034155854 doi "https://doi.org/10.1210/endo-119-5-2106" @default.
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