催产素受体表达和激活在偏交的脑干心脏神经元中的催产素受体表达和激活
Xin Wang1, Caitlin Ribeiro1, Anna Nilsson2
1Department of Pharmacology and Physiology, The George Washington University, Washington, DC 20037.
eNeuro
|August 6, 2025
概括
催产素受体在脑干心神经元中发现,特别是在迷路的背部运动核中. 激活这些催产素受体表达神经元会降低心率,这表明自主失衡的治疗目标.
科学领域:
- 神经科学是一个神经科学.
- 心脏病学 心脏病学
- 内分泌学 在内分泌学.
背景情况:
- 自主失衡,以降低副交感心脏神经元 (CVN) 活动为标志,在心肺呼吸系统疾病中很常见.
- 下丘脑中的催产素 (OXT) 神经元形成了一个激发性通路到CVN,这表明OXT是潜在的治疗剂.
- 内鼻OXT在改善自主平衡和减少阻塞性睡眠呼吸暂停患者的症状方面表现有前途,但机制尚不清楚.
研究的目的:
- 为了研究氧化素受体 (OXTRs) 在心神经元 (CVN) 中的小鼠核模糊 (NA) 和迷路的背部运动核 (DMNX) 中的局部化.
- 确定OXT对NA和DMNX中CVN活动的影响.
- 探索针对治疗干预的OXTR表达CVN的潜力.
主要方法:
- 在雄性和雌性小鼠NA和DMNX中的CVN和非CVN胆能神经元中OXTR同位化的表征.
- 电生理学记录以评估OXT对CVN发射率的影响.
- 在DMNX中使用DREADDs选择性化学遗传激活OXTR+CVN.
主要成果:
- 在DMNX内,OXTR在CVN中表达很高,但在NA中没有.
- OXT选择性地增加了DMNX CVN的发射率,但对NA CVN没有影响.
- 对OXTR+ DMNX CVN的化学遗传激发诱导了快速和持续的胸.
结论:
- 在DMNX中的心神经元表达功能性催产素受体.
- 用催产素激活表达OXTR的DMNX CVN,为恢复心肺呼吸系统障碍的自主平衡提供了一个潜在的治疗策略.
- 这项研究确定了OXT对心脏自主控制的影响的特定神经通路.
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