Connexin hemichannels in the lens.

Connexin hemichannels in the lens.
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DOI:
10.3389/fphys.2014.00020
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发表时间:
2014
影响因子:
4
通讯作者:
Berthoud VM
Berthoud VM
中科院分区:
医学2区
文献类型:
--
作者:
Beyer EC;Berthoud VM

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无血管晶状体中细胞的正常功能和存活是通过主要由三种连接蛋白(Cx43、Cx46和Cx50)形成的广泛的间隙连接网络进行细胞间通讯来促进的。在表达系统中,这些连接蛋白都可以诱导半通道电流,但其他晶状体蛋白(如pannexin1)也可以诱导类似的电流。在孤立的晶状体纤维细胞中检测到半通道电流。这些半通道可能对正常晶状体生理和病理生理有重要贡献。一些与先天性白内障相关的连接蛋白突变的研究表明,在疾病发病机制中,具有异常电压依赖性门控或二价阳离子调节的半通道。半通道也可能导致与年龄和疾病相关的白内障。
The normal function and survival of cells in the avascular lens is facilitated by intercellular communication through an extensive network of gap junctions formed predominantly by three connexins (Cx43, Cx46, and Cx50). In expression systems, these connexins can all induce hemichannel currents, but other lens proteins (e.g., pannexin1) can also induce similar currents. Hemichannel currents have been detected in isolated lens fiber cells. These hemichannels may make significant contributions to normal lens physiology and pathophysiology. Studies of some connexin mutants linked to congenital cataracts have implicated hemichannels with aberrant voltage-dependent gating or modulation by divalent cations in disease pathogenesis. Hemichannels may also contribute to age- and disease-related cataracts.
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