Calcium signals monitored from leopard frog optic tectum after the optic nerve has been selectively loaded with calcium sensitive dye

被引：4

作者：

Dudkin, EA ^{[1
]}

Myers, PZ ^{[1
]}

Ramirez-Latorre, JA ^{[1
]}

Gruberg, ER ^{[1
]}

机构：

[1] Temple Univ, Dept Biol, Philadelphia, PA 19122 USA

来源：

NEUROSCIENCE LETTERS | 1998年 / 258卷 / 02期

关键词：

calcium green; optic nerve; optic tectum; leopard frog; presynaptic facilitation;

D O I：

10.1016/S0304-3940(98)00870-2

中图分类号：

Q189 [神经科学];

学科分类号：

071006 ;

摘要：

We loaded adult leopard frog optic nerves with the calcium-sensitive dye Calcium Green-1 3000 mw dextran conjugate. The dye was transported to the optic tectum in approximately 6 days and selectively labeled optic nerve terminals as seen with confocal microscopy. Viewed with an intensified CCD system, electrical stimulation of the optic nerve in vitro increases Calcium Green-1 fluorescence significantly. With increasing number of pulses in pulse trains there was increased presynaptic facilitation as measured by increased fluorescence. Addition of nicotine to the bathing solution increased baseline fluorescence. These results suggest that Calcium Green-1 dextran conjugate can be actively transported in adult nerve fibers over a significant distance and is retained in presynaptic terminals in a form that allows monitoring of presynaptic calcium levels. (C) 1998 Elsevier Science Ireland Ltd. All rights reserved.

引用

页码：124 / 126

页数：3

共 6 条

[1] Presynaptic calcium dynamics at the frog retinotectal synapse [J].