Newman E A, Frambach D A, Odette L L
Science. 1984 Sep 14;225(4667):1174-5. doi: 10.1126/science.6474173.
Efflux of K+ from dissociated salamander Müller cells was measured with ion-selective microelectrodes. When the distal end of an isolated cell was exposed to high concentrations of extracellular K+, efflux occurred primarily from the endfoot, a cell process previously shown to contain most of the K+ conductance of the cell membrane. Computer simulations of K+ dynamics in the retina indicate that shunting ions through the Müller cell endfoot process is more effective in clearing local increases in extracellular K+ from the retina than is diffusion through extracellular space.
用离子选择性微电极测量了离体蝾螈Müller细胞的钾离子外流。当分离细胞的远端暴露于高浓度细胞外钾离子时，外流主要发生在终足，终足是一种细胞突起，先前已证明其包含细胞膜大部分的钾离子电导。视网膜中钾离子动力学的计算机模拟表明，通过Müller细胞终足突起分流离子，比通过细胞外空间扩散，能更有效地清除视网膜局部细胞外钾离子的增加。
