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- W2076135084 abstract "Abstract Prenatal testosterone (T) excess in sheep results in a wide array of reproductive neuroendocrine deficits and alterations in motivated behavior. The ventral tegmental area ( VTA ) plays a critical role in reward and motivated behaviors and is hypothesised to be targeted by prenatal T. Here we report a sex difference in the number VTA dopamine cells in the adult sheep, with higher numbers of tyrosine hydroxylase ( TH )‐immunoreactive (‐ir) cells in males than females. Moreover, prenatal exposure to excess T during either gestational days 30–90 or 60–90 resulted in increased numbers of VTA TH ‐ir cells in adult ewes compared to control females. Stereological analysis confirmed significantly greater numbers of neurons in the VTA of males and prenatal T‐treated ewes, which was primarily accounted for by greater numbers of TH ‐ir cells. In addition, immunoreactivity for TH in the cells was denser in males and prenatal T‐treated females, suggesting that sex differences and prenatal exposure to excess T affects both numbers of cells expressing TH and the protein levels within dopamine cells. Sex differences were also noted in numbers of TH ‐ir cells in the substantia nigra, with more cells in males than females. However, prenatal exposure to excess T did not affect numbers of TH ‐ir cells in the substantia nigra, suggesting that this sex difference is organised independently of prenatal actions of T. Together, these results demonstrate sex differences in the sheep VTA dopamine system which are mimicked by prenatal treatment with excess T." @default.
- W2076135084 created "2016-06-24" @default.
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- W2076135084 date "2015-03-18" @default.
- W2076135084 modified "2023-10-17" @default.
- W2076135084 title "Sex differences and effects of prenatal exposure to excess testosterone on ventral tegmental area dopamine neurons in adult sheep" @default.
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- W2076135084 doi "https://doi.org/10.1111/ejn.12871" @default.
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