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- W2085382014 abstract "Recent immunohistochemical analyses of rat brains have established the presence of neuronal aromatase and stigmoid body in interfaces of a sex-steroid/brain axis. Aromatase P450-immunoreactive (AROM-I) neurons, which are present only during embryonic Day 16 to postnatal Day 2 (E16-P2), are found in the anterior medial preoptic nucleus, the periventricular preoptic nucleus, and the ventromedial hypothalamic nucleus. The largest AROM-I cell-group localized in the medial preoptico-amygdaloid neuronal arc (mPO-AM) shows a peak during E18-P2 and gradually diminishes after the perinatal days (but still retains the immunoreactivity in adults). In adults, other groups of AROM-I neurons emerge in the lateral septum, the central amygdaloid nucleus, and the bed nucleus of the stria terminalis. Male-predominant sex difference for aromatase expression has been detected at least in the young-to-adult mPO-AM, reflecting sexually distinct endocrine and behavioral responses in the rat reproductive functions. These results suggest the presence of distinct brain-aromatases with different regulatory systems. Neuronal aromatase may modulate development of sexual dimorphism in neonates and activation of reproductive functions in adults. The stigmoid bodies, marked by placental aromatase-associated antigen X-P2 (PAX) antiserum, are also frequent in the sex-steroid targets of rat brains and intimately coexist with estrogen receptors in the mPO-AM of young females. The neuronal inclusion, suspected as a RNA/protein conglomerate, appears to be induced by the decrease of androgen and/or the increase of estrogen, especially as a result of subneuronal aromatic switching into the estrogenous state. The neuronal aromatase and stigmoid body may play important roles in the pre- and post-receptor steps of subneuronal sex-steroids actions for brain sexual differentiation or induction of reproductive functions." @default.
- W2085382014 created "2016-06-24" @default.
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- W2085382014 date "1994-12-01" @default.
- W2085382014 modified "2023-09-23" @default.
- W2085382014 title "Sex-Steroid Receptor Mechanism Related to Neuronal Aromatase and the Stigmoid Body" @default.
- W2085382014 doi "https://doi.org/10.1006/hbeh.1994.1053" @default.
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