Eagled eyed scientist sheds light on the function of CRB proteins

The concomitant loss of CRB1 and CRB2 in mouse Mϋller glial cells mimics Leber congenital amaurosis in humans due to the loss of CRB1.

CRB2 in MGC and photoreceptor cells in cynomologus macaque retina

Pete Quinn in the group of Jan Wijnholds (Dept. of Ophthalmology) at the LUMC is interested in the role that the Crumbs homolog-1 (CRB) genes play in the early development of hereditary eye diseases (retinitis pigmentosa and Leber congenital amaurosis) in children. To investigate the physiological role that CRB genes play they analysed mouse retinas lacking both CRB1 and CRB2  proteins in retinal  Muller glial cells (MGCs) and investigated the localization of CRB 1 and CRB2 in non-human primate retinas. Ultrastructural analysis by the section of electron microscopy showed that the CRB 1 and 2 proteins localized to the subapical region adjacent to the outer limiting membrane in MGC and photoreceptor cells.

Loss of CRB2 in Müller glial cells modifies a CRB1-associated retinitis pigmentosa phenotype into a Leber congenital amaurosis phenotype. Peter M Quinn Aat A Mulder C Henrique Alves Mélissa Desrosiers Sharon I de VriesJan Klooster Deniz Dalkara Abraham J Koster Carolina R Jost Jan Wijnholds Human Molecular Genetics, ddy337, https://doi.org/10.1093/hmg/ddy337

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