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Revisiting the role of Dcc in visual system development with a novel eye clearing method

Abstract : The Deleted in Colorectal Carcinoma (Dcc) receptor plays a critical role in optic nerve development. Whilst Dcc is expressed postnatally in the eye, its function remains unknown as Dcc knockouts die at birth. To circumvent this drawback, we generated an eye-specific Dcc mutant. To study the organization of the retina and visual projections in these mice, we also established EyeDISCO, a novel tissue clearing protocol that removes melanin allowing 3D imaging of whole eyes and visual pathways. We show that in the absence of Dcc, some ganglion cell axons stalled at the optic disc, whereas others perforated the retina, separating photoreceptors from the retinal pigment epithelium. A subset of visual axons entered the CNS, but these projections are perturbed. Moreover, Dcc-deficient retinas displayed a massive postnatal loss of retinal ganglion cells and a large fraction of photoreceptors. Thus, Dcc is essential for the development and maintenance of the retina.
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https://www.hal.inserm.fr/inserm-03024300
Contributor : Kim Nguyen-Ba-Charvet Connect in order to contact the contributor
Submitted on : Wednesday, November 25, 2020 - 5:44:13 PM
Last modification on : Tuesday, December 8, 2020 - 3:39:02 AM
Long-term archiving on: : Friday, February 26, 2021 - 7:54:03 PM

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Robin Vigouroux, Quénol Cesar, Alain Chédotal, Kim Nguyen-Ba-Charvet. Revisiting the role of Dcc in visual system development with a novel eye clearing method. eLife, eLife Sciences Publication, 2020, 9, pp.e51275. ⟨10.7554/eLife.51275⟩. ⟨inserm-03024300⟩

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