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- W2114535247 abstract "Abstract— Ovariectomized female rats were treated daily with oestradiol-17β benzoate for intervals up to one week and enzyme activities were measured in the pituitary and various brain regions. Brain regions were selected for study on the basis of their previously demonstrated content of putative oestradiol receptor sites. (1) Pituitary showed oestrogen-dependent increases in glucose-6-phosphate dehydrogenase (G6PDH), 6-phosphogluconate dehydrogenase (6PGDH) and lactic dehydrogenase (LDH), and no change in NADP+-dependent isocitric dehydrogenase (ICDH), NADP+-dependent malic dehydrogenase (MDH) or hexokinase (HK). MDH and ICDH were elevated in whole hypothalamus. Enzyme activities did not change significantly in whole amygdala, cerebral cortex, or hippocampus. (2) Sub-regions of the preoptic area, hypothalamus and amygdala were dissected to obtain more highly concentrated populations of cells containing putative oestrogen receptor sites. In the basomedial sub-region of hypothalamus, activities of MDH, ICDH and G6PDH were elevated by oestrogen treatment. In the corticomedial sub-region of amygdala, MDH and ICDH were elevated by oestrogen treatment. No change was observed in any of the six enzymes in medial preoptic area. (3) Increases in enzyme activities were related to the total in vivo dose of oestradiol benzoate given. (4) Hypophysectomy or adrenalectomy did not prevent the enzymatic responses to oestrogen. (S) Oestrogen added directly to the enzyme incubation medium did not change enzyme activities. (6) Weight loss in ovariectomized rats due to reduced food intake did not increase enzyme activities. (7) In the pituitary, good correlation was obtained between the known receptor binding properties of various oestrogenic and non-oestrogenic steroids and the elevation in G6PDH activity. The results indicate that oestradiol acts directly to cause changes in activities of some brain and pituitary enzymes. The possibility is discussed that these changes may result from oestrogen interaction with putative receptor sites found in pituitary and certain brain regions." @default.
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- W2114535247 date "1974-11-01" @default.
- W2114535247 modified "2023-09-23" @default.
- W2114535247 title "OESTROGEN EFFECTS ON BRAIN AND PITUITARY ENZYME ACTIVITIES" @default.
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- W2114535247 doi "https://doi.org/10.1111/j.1471-4159.1974.tb10744.x" @default.
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