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- W2012304435 abstract "The supraoptic nuclei of both male and female 30-day-old rats rendered hypothyroid by daily subcutaneous injection of propylthiouracil were studied and the results were compared with age- and sex-matched rats fedad libitum (control rats) and with undernourished rats. Morphometric methods were used to evaluate the volume of the supraoptic nucleus and the areal and numerical densities of its neurons. These parameters allowed us to estimate the total number of neurons of this nucleus. In addition, the mean cross-sectioned area and mean nuclear diameter of the same neurons were also evaluated. The volume of the supraoptic nucleus was reduced both in hypothyroid and undernourished animals when compared with normal controls. The areal and numerical densities of neurons from the former groups were increased and the volume density of the neuropil was reduced. As a consequence, the total number of neurons was found to be identical in all groups studied. Furthermore, the mean nuclear diameters and cross-sectioned areas of the supraoptic neurons were similar in all groups. The volumetric differences and the increased packing found were always more marked for hypothyroid than for undernourished rats. Differences were not detected between male and female groups. The present results support the view that the increased cell packing in hypothyroid animals depends upon a reduction in the neuropil of the nucleus, as has been described under similar conditions in other central nervous system areas displaying identical patterns of neurogenesis. In addition, it was found that the effects of undernourishment cannot be discriminated from those dependent on neonatal hypothyroidism." @default.
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- W2012304435 date "1991-01-01" @default.
- W2012304435 modified "2023-09-25" @default.
- W2012304435 title "The supraoptic nucleus in hypothyroid and undernourished rats: An experimental morphometric study" @default.
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- W2012304435 doi "https://doi.org/10.1016/0306-4522(91)90373-v" @default.
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