功能障碍的单碳代谢识别了维生素B6,B9,B12和胆在青光眼中作为神经保护剂
James R Tribble1, Vickie H Y Wong2, Kelsey V Stuart3
1Department of Clinical Neuroscience, Division of Eye and Vision, St. Erik Eye Hospital, Karolinska Institutet, Stockholm, Sweden.
Cell reports. Medicine
|May 9, 2025
概括
高水平的同类氨酸有助于青光眼诱导的视网膜质细胞死亡. 补充诸如维生素B和胆之类的关键营养素可以提供神经保护,并保持视力.
科学领域:
- 眼科医生 眼科 眼科
- 神经科学是一个神经科学.
- 代谢障碍 代谢障碍 代谢障碍
背景情况:
- 玻璃眼是不可逆转的失明的主要原因,原因是视网膜质细胞 (RGC) 损失.
- 目前的治疗方法无法提供神经保护,这突出了关键的未满足需求.
- 在玻璃眼病患者中观察到高水平的同型半氨酸,但其作用尚不清楚.
研究的目的:
- 为了研究高水平的同类半氨酸在玻璃眼瘤中的致病作用.
- 探索同类氨酸代谢对RGC存活的影响.
- 评估绿眼中营养补充的神经保护潜力.
主要方法:
- 在眼睛高血压模型中提高玻璃体同类固醇.
- 在英国生物库数据中分析遗传关联和血清同型半氨酸水平.
- 在玻璃眼动物模型中研究单碳代谢中的基因表达.
- 评估B族维生素 (B6,B9,B12) 和胆补充剂的作用.
主要成果:
- 在急性眼睛高血压模型中,高水平的玻璃体同型半氨酸会使RGC死亡增加6%.
- 在人体数据中,遗传和血清类固醇水平与玻璃眼结局没有相关性.
- 玻璃眼瘤模型显示,视网膜组织和RGCs中的单碳代谢基因的调节失调.
- 营养补充剂在急性模型中证明了神经保护,并在慢性模型中预防神经退行,保持视觉功能.
结论:
- 高水平的homocysteine似乎是一个致病因素,而不是直接的原因,在玻璃眼.
- 单碳新陈代谢的调节失调与玻璃眼病原发生有关.
- 补充必要的辅助因子和前体提供了一个有前途的神经保护策略,对玻璃眼.
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