Prenatal beta-endorphin can modulate some aspects of sexual differentiation in rats.

Prenatal beta-endorphin can modulate some aspects of sexual differentiation in rats.
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产前β-内啡肽可以调节大鼠性别分化的某些方面。

DOI:
10.1037//0735-7044.106.3.555
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发表时间:
1992
影响因子:
1.9
通讯作者:
Ward,IL
Ward,IL
中科院分区:
医学4区
文献类型:
--
作者:
Kashon,ML;Ward,OB;Grisham,W;Ward,IL

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从妊娠第14天至第21天,每天3次注射33 μg大鼠β-内啡肽(β-END),观察其子代的两性二态特征。β-END雄性的新生儿肛门生殖器距离比对照组短,成年后更有可能表现出雌性前凸模式,但它们在雄性交配行为上没有差异。当让β-END雄性在与发情的雌性或雄性之间做出选择时,它们对雌性的偏好低于对照组。腰椎海绵体球核和背外侧核的神经元数量和染色体大小不受药物暴露的影响。胎儿个体发育过程中β-END的升高明显改变了一些(但不是全部)两性二型性状的分化。数据表明,内源性阿片类药物可能有助于产前应激综合征的病因。(PsycINFO数据库记录(c) 2016 APA,版权所有)
Sexually dimorphic traits were studied in offspring of rats injected with 33 μg rat β-endorphin (β-END) 3 times daily from Day 14 to Day 21 of pregnancy. β-END males had shorter neonatal anogenital distances than did controls and were more likely to show the female lordosis pattern as adults, but they did not differ in male copulatory behavior. When given a choice between spending time with an estrous female or a male, β-END males showed a lower preference for the female than did control males. The number and somal size of neurons in the bulbocavernosus and dorsolateral nucleus of the lumbar spinal cord were unaffected by drug exposure. Elevated β-END during fetal ontogeny apparently alters the differentiation of some, but not all, sexually dimorphic traits. The data suggest that endogenous opioids may contribute to the etiology of the prenatal stress syndrome.(PsycINFO Database Record (c) 2016 APA, all rights reserved)
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