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The effect of adrenalectomy or pharmacological inhibition of adrenocortical function on macromolecule uptake by the new‐born rat intestine
Author(s) -
Daniels V. G.,
Hardy R. N.,
Malinowska K. W.
Publication year - 1973
Publication title -
the journal of physiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.802
H-Index - 240
eISSN - 1469-7793
pISSN - 0022-3751
DOI - 10.1113/jphysiol.1973.sp010161
Subject(s) - aminoglutethimide , adrenalectomy , medicine , endocrinology , corticosterone , chemistry , bilateral adrenalectomy , small intestine , biology , hormone , cancer , breast cancer , aromatase
1. Bilateral adrenalectomy in 18‐day‐old rats resulted in an extension by approximately 4 days of the period during which the villous epithelial cells of the small intestine took up polyvinyl pyrrolidone (PVP) of mean mol. wt. 160,000. 2. The eventual termination of PVP uptake (‘closure’) closely resembled normal closure in control animals: the time course of the decline in uptake and the histological changes indicated that more mature ‘PVP‐impermeable’ cells progressively ascended the villi. 3. Injection of Metopirone was ineffective in animals 10 days after birth, but when injected after day 13 caused closure within 3 days. 4. Metopirone injection significantly reduced the plasma concentration of corticosterone and caused a marked rise in the plasma concentration of deoxycorticosterone. 5. Aminoglutethimide injection also produced precocious closure and had an effect similar to Metopirone on the plasma concentrations of corticosterone and deoxycorticosterone. 6. Injection of Metopirone or aminoglutethimide increased the relative adrenal weight compared with control animals. Aminoglutethimide was more effective and caused approximately a 100% increase in adrenal weight.