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Afadin-deficient mouse retinas exhibit severe neuronal lamination defects but preserve visual functions
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Afadin-deficient mouse retinas exhibit severe neuronal lamination defects but preserve visual functions
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Journal Article
Afadin-deficient mouse retinas exhibit severe neuronal lamination defects but preserve visual functions
2025
Overview
Neural lamination is a common feature of the CNS, with several subcellular structures, such as adherens junctions (AJs), playing a role in this process. The retina is also heavily laminated, but it remains unclear how laminar formation impacts retinal cell morphology, synapse integrity, and overall retinal function. In this study, we demonstrate that the loss of afadin, a key component of AJs, in mice leads to significant pathological changes. These include the disruption of outer retinal lamination and a notable decrease as well as mislocalization of photoreceptors, their outer segments, and photoreceptor synapses. Interestingly, despite these severe impairments, we recorded small local field potentials, including the a- and b-waves. We also classified retinal ganglion cells (RGCs) into ON, ON-OFF, and OFF types based on their firing patterns in response to light stimuli. Additionally, we successfully characterized the receptive fields of certain RGCs. Overall, these findings provide evidence that retinal circuit function can be partially preserved even when there are significant disruptions in both retinal lamination and photoreceptor synapses. Our results indicate that retinas with severely altered morphology still retain some capacity to process light stimuli.
Publisher
eLife Sciences Publications Ltd
