Cellular Mechanisms Underlying Swim Acceleration in the Pteropod Mollusk Clione limacina1

Cellular Mechanisms Underlying Swim Acceleration in the Pteropod Mollusk Clione limacina1
复制标题

翼足类软体动物 Clione limacina1 游泳加速的细胞机制

DOI:
--
复制
发表时间:
2004
影响因子:
2.6
通讯作者:
R. Satterlie
R. Satterlie
中科院分区:
生物学2区
文献类型:
--
作者:
Thomas J. Pirtle;R. Satterlie

文献摘要

参考文献

被引文献

相似文献

翼足类软体动物Clione limacina通过其翅状副足的背-腹拍打运动游泳。观察两种基本的游泳速度——慢速和快速。血清素通过增加翅膀运动的频率来提高游泳速度。它通过调节包含游泳中枢模式发生器(CPG)的游泳中间神经元的固有特性来实现这一目标。在这里,我们研究了一些离子电流,这些离子电流介导了游泳中间神经元内在特性的变化,从而提高了Clione的游泳速度。5 -羟色胺影响游泳中间神经元在从慢速到快速过渡过程中的三个内在特性:基线去极化、抑制后反弹(PIR)和spike变窄。目前的钳形实验表明,Ih和IA都不能完全解释血清素诱导的基线去极化。然而,Ih和IA都对PIR阻断的时间有很强的影响,Ih增加了PIR的延迟,而IA阻断则减少了PIR的延迟。最后,维生素a受体阻滞剂IK(Ca)逆转血清素诱导的尖峰变窄。这些结果表明血清素可能同时增强Ih和IK(Ca),抑制IA,从而促进运动速度的增加。
Abstract The pteropod mollusk Clione limacina swims by dorsal-ventral flapping movements of its wing-like parapodia. Two basic swim speeds are observed—slow and fast. Serotonin enhances swimming speed by increasing the frequency of wing movements. It does this by modulating intrinsic properties of swim interneurons comprising the swim central pattern generator (CPG). Here we examine some of the ionic currents that mediate changes in the intrinsic properties of swim interneurons to increase swimming speed in Clione. Serotonin influences three intrinsic properties of swim interneurons during the transition from slow to fast swimming: baseline depolarization, postinhibitory rebound (PIR), and spike narrowing. Current clamp experiments suggest that neither Ih nor IA exclusively accounts for the serotonin-induced baseline depolarization. However, Ih and IA both have a strong influence on the timing of PIR—blocking Ih increases the latency to PIR while blocking IA decreases the latency to PIR. Finally, apamin a blocker of IK(Ca) reverses serotonin-induced spike narrowing. These results suggest that serotonin may simultaneously enhance Ih and IK(Ca) and suppress IA to contribute to increases in locomotor speed.
运动模式发生器中血清素引起的尖峰变窄允许加速期间循环频率的增加。
DOI: 10.1152/jn.2000.83.4.2163
发表时间: 2000
期刊: Journal of neurophysiology.
影响因子: --
作者:
Satterlie,RA;Norekian,TP;Pirtle,TJ
通讯作者: Pirtle,TJ
翼足类软体动物 Clione limacina 游泳速度的血清素调节。
DOI: 10.1242/jeb.198.4.917
发表时间: 1995
期刊: The Journal of experimental biology
影响因子: --
作者:
Satterlie,RA;Norekian,TP
通讯作者: Norekian,TP
DOI: 10.1152/jn.1999.81.1.29
发表时间: 1999-01-01
影响因子: 2.5
作者:
Kloppenburg, P;Levini, RM;Harris-Warrick, RM
通讯作者: Harris-Warrick, RM
DOI: 10.1242/jeb.198.4.905
发表时间: 1995
期刊: The Journal of experimental biology
影响因子: --
作者:
Satterlie,RA
通讯作者: Satterlie,RA