细胞内Zn2+促进细胞外矩阵重塑,在德克萨米他治疗的脊椎状网状组织中
Canying Liu1, Jiahui Tang1, Yuze Chen1
1State Key Laboratory of OphthalmologyZhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual ScienceGuangzhouChina.
American journal of physiology. Cell physiology
|March 25, 2024
概括
补充剂可以通过恢复眼睛的细胞外矩阵平衡来帮助控制玻璃眼. 研究表明,有助于降低眼内压力 (IOP) 和改善视力在治疗德克萨米他的小鼠.
科学领域:
- 眼科医生 眼科 眼科
- 细胞生物学 细胞生物学
- 生物化学 生物化学
背景情况:
- 葡萄糖皮质类药物在眼科中广泛使用,但可以增加眼内压力 (IOP).
- 葡萄糖皮质类药物诱导的IOP升高背后的确切机制,特别是涉及到椎网状 (TM) 细胞外矩阵 (ECM),尚未完全理解.
- 矩阵金属蛋白酶 (MMP) 和它们的辅因子 (Zn2+) 都与ECM调节有关.
研究的目的:
- 为了研究在德甲 (DEX) 诱导的肌网外细胞基质的改变中的作用.
- 为了确定补充剂是否可以减轻DEX对IOP和TM结构的影响.
主要方法:
- 人类TM细胞接受了DEX和/或不同条件的治疗.
- 分析了细胞内和细胞外水平,ZIP和金属胺蛋白表达,MMP活性和ECM沉积.
- 小鼠接受补充剂和DEX治疗以评估IOP,TM原蛋白含量和视觉功能.
主要成果:
- 德克斯治疗降低了TM细胞的细胞内Zn2+和细胞外Zn2+吸收,与ZIP蛋白的变化有关.
- Zn2+化模仿了DEX效应,减少了MMP2,增加了ECM沉积,并破坏了ECM结构.
- 在小鼠中,外源性Zn2+补充剂或饮食改善了DEX诱导的IOP升高,TM原积累,并挽救了视觉功能.
结论:
- 在调节TM细胞外矩阵恒温中发挥着至关重要的作用.
- 缺乏或吸收受损有助于葡萄糖皮质激素诱导的眼睛高血压.
- 补充剂是治疗青光瘤和眼睛高血压的潜在治疗策略.
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