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RAD21-R450C variant is associated with corneal stroma disorganization

ABSTRACT: In this study, a RAD21 variant, R450C, is found associated with a peripheral sclerocornea pedigree. Omics analyses including RNAseq and Hi-C were applied to identify the expression and chromosome conformation of cell adhesion genes were affected by this variant.

ORGANISM(S): Homo sapiens

PROVIDER: GSE125731 | GEO | 2022/01/01

REPOSITORIES: GEO

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RAD21-R450C variant is associated with corneal stroma disorganization

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Project description:Previously, we identified RAD21R450C from a peripheral sclerocornea pedigree. Injection of this rad21 variant mRNA into Xenopus laevis embryos disrupted the organization of corneal stroma fibrils. To understand the mechanisms of RAD21-mediated corneal stroma defects, gene expression and chromosome conformation analysis were performed using cells from family members affected by peripheral sclerocornea. Both gene expression and chromosome conformation of cell adhesion genes were affected in cells carrying the heterozygous rad21 variant. Since cell migration is essential in early embryonic development and sclerocornea is a congenital disease, we studied neural crest migration during cornea development in X. laevis embryos. In X. laevis embryos injected with rad21 mutant mRNA, neural crest migration was disrupted, and the number of neural crest-derived periocular mesenchymes decreased significantly in the corneal stroma region. Our data indicate that the RAD21R450C variant contributes to peripheral sclerocornea by modifying chromosome conformation and gene expression, therefore disturbing neural crest cell migration, which suggests RAD21 plays a key role in corneal stroma development.

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