Modulation of cone horizontal cell activity in the teleost fish retina. I. Effects of prolonged darkness and background illumination on light responsiveness.

作者: XL Yang , K Tornqvist , JE Dowling

DOI: 10.1523/JNEUROSCI.08-07-02259.1988

关键词: AnatomyCell activityPerchBiophysicsBiologyRetinaDarknessElectrophysiologyCarpMembrane potentialFish <Actinopterygii>

摘要: The effects of prolonged (greater than 2 hr) darkness and background illumination on the light responsiveness cone horizontal cells were examined in isolated, superfused white perch retinas. In retinas from fish maintained complete for more hr, had a resting membrane potential about -18 mV, they generated only slow, low-amplitude (3-4 mV) responses even when stimulated with bright flashes. Following presentation dim light, slowly hyperpolarized thereafter remained at level (about -25 mV). Concurrently, their dramatically enhanced size, response amplitudes to flashes eventually increased 50 mV. This was accompanied by noticeable changes waveforms; following exposure, became faster showed initial on-transients. increase cell graded intensity light. A similar enhancement occurred after presenting repetitively intervals 9 sec. sensitization phenomenon observed both L- C-type cells. When light-sensitized isolated long periods 30 min), gradually decreased. waveform opposite those that dark-adapted exposed lights; depolarized 5-7 mV light-evoked slower. Effects rod-driven as well. Rod log units sensitive recorded retinas, rod large (approximately mV), which could not be further illumination. Cone carp retina also depressed fashion retina. change amplitude 2-fold compared 5- 10-fold perch. These results indicate teleost is suppressed lights release suppression.(ABSTRACT TRUNCATED AT 400 WORDS)

参考文章(34)
R. H. Masland, A. Ames, Responses to acetylcholine of ganglion cells in an isolated mammalian retina Journal of Neurophysiology. ,vol. 39, pp. 1220- 1235 ,(1976) , 10.1152/JN.1976.39.6.1220
Xiong-Li YANG, Masaki TAUCHI, Akimichi KANEKO, Quantitative Analysis of Photoreceptor Inputs to External Horizontal Cells in the Goldfish Retina Japanese Journal of Physiology. ,vol. 32, pp. 399- 420 ,(1982) , 10.2170/JJPHYSIOL.32.399
T Teranishi, K Negishi, S Kato, Regulatory effect of dopamine on spatial properties of horizontal cells in carp retina The Journal of Neuroscience. ,vol. 4, pp. 1271- 1280 ,(1984) , 10.1523/JNEUROSCI.04-05-01271.1984
B. Ehinger, B. Falck, A. M. Laties, Adrenergic neurons in teleost retina. Cell and Tissue Research. ,vol. 97, pp. 285- 297 ,(1969) , 10.1007/BF00344763
Donald C. Hood, Suppression of the frog's cone system in the dark. Vision Research. ,vol. 12, pp. 889- 907 ,(1972) , 10.1016/0042-6989(72)90013-2
R W Rodieck, W A Rushton, Cancellation of rod signals by cones, and cone signals by rods in the cat retina. The Journal of Physiology. ,vol. 254, pp. 775- 785 ,(1976) , 10.1113/JPHYSIOL.1976.SP011258