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• W1995091013 abstract "Steroid-induced changes in dopaminergic activity underlie many correlations between gonadal hormones and social behaviors. However, the effects of steroid hormones on the various behaviorally relevant dopamine cell groups remain unclear, and ecologically relevant species differences remain virtually unexplored. We examined the effects of estradiol (E2) manipulations on dopamine (DA) neurons of male and female zebra finches (Taeniopygia guttata), focusing on numbers of tyrosine hydroxylase-immunoreactive (TH-ir) cells in the A8-A15 cell groups, and on TH colocalization with Fos, conducted in the early A.M., in order to quantify basal transcriptional activity. TH is the rate-limiting enzyme for catecholamine synthesis, and specifically DA in the A8-A15 cell groups. In contrast to other examined birds and mammals, reducing E2 levels with the aromatase-inhibitor Letrozole failed to alter TH-ir neuron numbers within the ventral tegmental area (VTA; A10), while increasing neuron numbers in the central gray (CG; A11) and caudal midbrain A8 populations. Consistent with findings in other birds, but not mammals, we also found no effects of E2 manipulations (Letrozole or Letrozole plus E2 replacement) on TH-Fos colocalization in any location. In accordance with previous observations in both mammals and birds, E2 treatment decreased the number of TH-ir neurons in the A12 population of the tuberal hypothalamus, a cell group that inhibits the release of prolactin. In general, males and females exhibited similar TH-ir neuron numbers, although males exhibited significantly more TH-ir neurons in the A11 CG population than did females. These results suggest partial variability in E2 regulation of DA across species." @default.
• W1995091013 created "2016-06-24" @default.
• W1995091013 creator A5013279409 @default.
• W1995091013 creator A5013633347 @default.
• W1995091013 creator A5069451296 @default.
• W1995091013 creator A5084070670 @default.
• W1995091013 date "2011-08-01" @default.
• W1995091013 modified "2023-09-29" @default.
• W1995091013 title "Estrogenic regulation of dopaminergic neurons in the opportunistically breeding zebra finch" @default.
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• W1995091013 doi "https://doi.org/10.1016/j.ygcen.2011.04.026" @default.
• W1995091013 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3130106" @default.
• W1995091013 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/21600208" @default.
• W1995091013 hasPublicationYear "2011" @default.

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