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Journal Article
Gibbin mesodermal regulation patterns epithelial development
2022
Overview
Proper ectodermal patterning during human development requires previously identified transcription factors such as GATA3 and p63, as well as positional signalling from regional mesoderm
1
–
6
. However, the mechanism by which ectoderm and mesoderm factors act to stably pattern gene expression and lineage commitment remains unclear. Here we identify the protein Gibbin, encoded by the Xia–Gibbs AT-hook DNA-binding-motif-containing 1 (
AHDC1
) disease gene
7
–
9
, as a key regulator of early epithelial morphogenesis. We find that enhancer- or promoter-bound Gibbin interacts with dozens of sequence-specific zinc-finger transcription factors and methyl-CpG-binding proteins to regulate the expression of mesoderm genes. The loss of Gibbin causes an increase in DNA methylation at GATA3-dependent mesodermal genes, resulting in a loss of signalling between developing dermal and epidermal cell types. Notably, Gibbin-mutant human embryonic stem-cell-derived skin organoids lack dermal maturation, resulting in p63-expressing basal cells that possess defective keratinocyte stratification. In vivo chimeric CRISPR mouse mutants reveal a spectrum of Gibbin-dependent developmental patterning defects affecting craniofacial structure, abdominal wall closure and epidermal stratification that mirror patient phenotypes. Our results indicate that the patterning phenotypes seen in Xia–Gibbs and related syndromes derive from abnormal mesoderm maturation as a result of gene-specific DNA methylation decisions.
Characterization of Gibbin, encoded by
AHDC1
, offers insights into the epidermal and mesodermal patterning phenotypes seen in Xia–Gibbs and related syndromes in humans, which derive from abnormal mesoderm maturation as a result of gene-specific DNA methylation decisions.
Publisher
Nature Publishing Group UK,Nature Publishing Group
Subject
/ 38/15
/ 38/22
/ 38/23
/ 38/39
/ 59
/ 64
/ 64/60
/ 692/699
/ 82
/ Animals
/ Binding
/ CRISPR
/ DNA
/ DNA-Binding Proteins - metabolism
/ Ectoderm
/ Embryonic Stem Cells - cytology
/ Embryonic Stem Cells - metabolism
/ Epidermal Cells - metabolism
/ Epithelial Cells - metabolism
/ Gene Expression Regulation, Developmental
/ Genes
/ Genomes
/ Humanities and Social Sciences
/ Humans
/ Mesoderm
/ Mice
/ Mutants
/ Mutation
/ Proteins
/ Science
