在抗氧戒断后,性别特异的行为和乳头积分电路适应
Y Alonso-Caraballo1,2, Y Li1, N J Constantino1,3
1Department of Psychiatry, McLean Hospital, Harvard Medical School, Belmont, MA, USA.
bioRxiv : the preprint server for biology
|August 16, 2024
概括
长时间戒氧会增加大脑中的突触强度,导致女性的复发率更高. 这突显了阿片类药物使用障碍中性别特异性的脆弱性.
科学领域:
- 神经科学是一个神经科学.
- 成研究 研究成研究
- 行为药理学行为药理学
背景情况:
- 阿片类药物使用障碍涉及强迫性寻找药物,尽管负面的后果.
- 渴望的潜伏加剧了戒断后使用药物的冲动.
- 在阿片类药物使用障碍复发脆弱性的性别差异仍然不清楚.
研究的目的:
- 为了研究禁欲持续时间对神经传递的性别特异性影响,在向腹腔体下丘脑 (PVT) 到核 (NAcSh) 的神经传递途径中.
- 为了检查在氧化自给和戒断后的突触可塑性和神经元刺激性.
- 为了确定急性和长期戒断后暗示诱导的复发率的性别差异.
主要方法:
- 在雄性和雌性大鼠中,氧化自给药.
- 光遗传学和ex vivo电生理学以评估PVT-NAcSh通路的突触功能.
- 测量谷氨酸释放概率和中等脊髓神经元 (MSN) 兴奋度.
- 在戒断1天 (急性) 或14天 (长期) 后,评估暗示诱导的复发.
主要成果:
- 在氧化摄入量或急性戒断症状方面没有性别差异.
- 女性在长期戒断后显示出更高的诱导性复发率,但不是急性戒断.
- 长时间的戒断增加了PVT-NAcSh输入中的突触强度,这种效应在急性戒断后没有观察到.
结论:
- 长时间的戒断会导致PVT-NAcSh通路中的时间依赖的突触变化.
- 长期戒断后,复发脆弱性的性别特定增加是显而易见的.
- 这些发现强调了针对阿片类药物使用障碍的性别定制治疗策略的必要性.
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