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素B₄ 在眼睛高血压期间减轻TRPV4-激活的米勒细胞结晶症

Matangi Kumar^1,2, Shruthi Karnam², Shubham Maurya²

¹Vision Science Graduate Group, University of California Berkeley, Berkeley, CA, United States.

bioRxiv : the preprint server for biology

|September 26, 2025

概括

穆勒质细胞产生素B4 (LXB4),一种抗炎分子,可以抵消质细胞激活和视网膜质细胞损失. 准这种TRPV4-脂素通路可能会防止神经退行.

科学领域:

神经科学是一个神经科学.
眼科医生眼科眼科
细胞生物学细胞生物学

背景情况:

穆勒质细胞对视网膜平衡至关重要,但有助于眼中神经炎症.
升高的眼内压力通过TRPV4激活了Müller质,导致视网膜质细胞 (RGC) 损失.
脂素B4 (LXB4),一种内源性脂质媒介,抑制质反应,并保护RGCs.

研究的目的:

调查LXB4是否调节TRPV4驱动的Müller质激活和炎症.
为了确定Müller glia是否有助于视网膜氧素通路.

主要方法:

使用诱导眼高血压 (OHT) 的小鼠.
穆勒的质细胞被分离出来用于转录组分析.
主要和不朽的Müller glia被用TRPV4激动剂治疗,有或没有LXB4.
用流式细胞计,免疫染,qPCR和西部涂抹来评估质反应性.
脂管药和单细胞RNA-seq被用于分析脂素途径代谢物和转录反应.
在视网膜部分评估了GFAP和TRPV4表达.

主要成果:

穆勒质表达5和15-氧基酶,并内源地产生LXB4.4.
TRPV4激活诱导了质反应 (gliosis) 和增加了素的产生.
在体外和体内,LXB4治疗抑制了TRPV4诱导的结晶体,并降低了炎症基因表达 (IL6,TNF-α).
在OHT期间,Müller glia中的LXB4减弱了TRPV4上调.

结论:

穆勒质细胞是视网膜中神经保护性LXB4的重要来源.
在TRPV4激活过程中,LXB4通路被放大,以抵消滑质症.
准TRPV4-素通路为OHT诱导的青光眼神经退行症提供了潜在的治疗策略.

关键词:

眼光障碍眼光障碍眼光障碍眼光障碍质细胞是质细胞的组成部分.脂质媒介体的作用脂毒素是一种脂毒素.神经退行发生神经退行.神经炎症是一种神经炎症.视网膜 (retina) 是一个视网膜.

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