一个脑体反循环驱动HPA轴功能障碍在乳腺癌中
bioRxiv : the preprint server for biology
|September 24, 2024
概括
乳腺癌通过影响下丘脑神经元来破坏身体的天然葡萄糖皮质激素 (GC) 节律. 准这些神经元可以恢复GC节律,减少瘤生长,并提高抗瘤免疫力.
科学领域:
- 神经科学是一个神经科学.
- 内分泌学 在内分泌学.
- 免疫学 免疫学 免疫学
背景情况:
- 在乳腺癌患者中观察到葡萄糖皮质激素 (GCs) 的昼夜节律受损,与较差的结果相关.
- 乳腺癌中GC节律扰乱的确切原因尚不清楚,潜在的因素包括治疗,压力和并发症.
- 原发性乳腺癌本身可能会直接影响调节GC的神经内分泌系统.
研究的目的:
- 为了调查原发性乳腺癌是否会破坏宿主葡萄皮质激素节律.
- 确定乳腺癌中GC节律障碍背后的神经机制.
- 探索神经调节下丘脑神经元的治疗潜力,以恢复GC节律并影响瘤生长.
主要方法:
- 利用乳腺瘤的小鼠模型来评估葡萄糖皮质醇节律和下丘脑神经元活动.
- 测量了副腹膜下丘脑皮质激素释放激素 (PVN) 神经元中的突触活动和神经元发射.
- 采用化学遗传学 (hM3Dq) 在特定的昼夜阶段刺激PVNCRH神经元,并评估瘤进展和抗瘤免疫力 (CD8+ T细胞).
主要成果:
- 乳腺瘤使宿主GC节律变得模糊,并增加了PVNCRH神经元的活性,甚至在瘤被触摸之前.
- 携带瘤的小鼠显示PVNCRH神经元上的抑制突触减少,导致净神经元刺激和对GC生产的负面反受损.
- 对PVNCRH神经元的循环阶段特异性刺激恢复了正常的GC节律,减少了瘤进展,并增强了瘤内 CD8+ T细胞的存在.
结论:
- 初级乳腺癌通过消毒PVNCRH神经元来破坏下丘脑-垂体-上腺 (HPA) 轴,导致改变GC节律.
- 治疗性神经调节PVNCRH神经元,定时到特定的昼夜阶段,可以减轻乳腺癌的进展.
- PVNCRH神经元刺激的抗瘤作用至少部分通过增强 CD8+ T 细胞依赖的抗瘤免疫力来调解.
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