TY - JOUR
T1 - Hemichannel-mediated inhibition in the outer retina
AU - Kamermans, M.
AU - Fahrenfort, I.
AU - Schultz, K.
AU - Janssen-Bienhold, U.
AU - Sjoerdsma, T.
AU - Weiler, R.
PY - 2001
Y1 - 2001
N2 - An essential feature of the first synapse in the retina is a negative feedback pathway from horizontal cells to cones. Here we show that at this synapse, connexin26 forms hemichannels on horizontal cell dendrites near the glutamate release site of the cones. Blocking these hemichannels hyperpolarizes horizontal cells, modulates the Ca2+ channels of the cones, and abolishes all feedback-mediated responses. We propose a feedback mechanism in which the activity of the Ca2+ channels and the subsequent glutamate release of the cones are modulated by a current through these hemichannels. Because the current through the hemichannels depends on the polarization of the horizontal cells, their activity modulates the output of the cones
AB - An essential feature of the first synapse in the retina is a negative feedback pathway from horizontal cells to cones. Here we show that at this synapse, connexin26 forms hemichannels on horizontal cell dendrites near the glutamate release site of the cones. Blocking these hemichannels hyperpolarizes horizontal cells, modulates the Ca2+ channels of the cones, and abolishes all feedback-mediated responses. We propose a feedback mechanism in which the activity of the Ca2+ channels and the subsequent glutamate release of the cones are modulated by a current through these hemichannels. Because the current through the hemichannels depends on the polarization of the horizontal cells, their activity modulates the output of the cones
U2 - https://doi.org/10.1126/science.1060101
DO - https://doi.org/10.1126/science.1060101
M3 - Article
C2 - 11349152
SN - 0036-8075
VL - 292
SP - 1178
EP - 1180
JO - Science
JF - Science
IS - 5519
ER -