Electrophysiological response of cultured trabecular meshwork cells to synthetic ion channels.

Electrophysiological response of cultured trabecular meshwork cells to synthetic ion channels.
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培养的小梁网细胞对合成离子通道的电生理反应。

DOI:
10.1016/s1074-5521(02)00307-1
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发表时间:
2003
影响因子:
--
通讯作者:
O. Strauß
O. Strauß
中科院分区:
生物1区
文献类型:
--
作者:
P. Fidzinski;Andrea Knoll;R. Rosenthal;Anna K. Schrey;A. Vescovi;U. Koert;M. Wiederholt;O. Strauß

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描述了小梁网活细胞对合成离子通道的反应。将THF-gramicidin杂交体THF-gram和THF-gram- tbdps以及gA-TBDPS和gramicidin a联合应用于培养的眼小梁网细胞。THF-gram应用(最小浓度,10−8M;饱和,10−7M)导致额外的电导,表现出弱eisenman - i选择性阳离子通道的特征,没有细胞破坏,向内/向外电流的不对称变化,以及与Na+和K+相比,Cs+作为电荷载体具有更高的电流密度。Linked-gA-TBDPS在10−12M时的膜电导率比在10−7M时的膜电导率高,细胞的反应速度快得多。因此,THF-gramicidin杂交体形成了在生物系统中使用合成离子通道的基础,最终可能导致新的治疗方法。
The response of living cells of the trabecular meshwork to synthetic ion channels is described. The THF-gramicidin hybrids THF-gram and THF-gram-TBDPS as well as a linked gA-TBDPS and gramicidin A were applied to cultured ocular trabecular meshwork cells. THF-gram application (minimal concentration, 10−8M; saturation, 10−7M) led to an additional conductance which displayed characteristics of weak Eisenman-I-selective cation channels, no cell destruction, an asymmetric change of the inward/outward currents, and higher current densities using Cs+as charge carrier compared to Na+and K+. Linked-gA-TBDPS showed at 10−12M increases of the membrane conductance comparable to gA at 10−7M and a much faster response of the cells. Thus, THF-gramicidin hybrids form a basis for the use of synthetic ion channels in biological systems, which eventually may lead to new therapeutic approaches.
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