2023
DOI: 10.1101/2023.12.05.570129
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A non-conducting role of the Cav1.4 Ca2+channel drives homeostatic plasticity at the cone photoreceptor synapse

Wesley Maddox,
Gregory J. Ordemann,
Juan de la Rosa Vázquez
et al.

Abstract: In congenital stationary night blindness type 2 (CSNB2)—a disorder involving dysfunction of the Cav1.4 Ca2+channel—visual impairment is relatively mild considering that Cav1.4 mediates synaptic transmission by rod and cone photoreceptors. Here, we addressed this conundrum using a Cav1.4 knockout (KO) mouse and a knock-in (KI) mouse expressing a non-conducting Cav1.4 mutant. Surprisingly, aberrant Cav3 currents were detected in cones of the KI and KO but not wild-type mice. Cone synapses, which fail to develop … Show more

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