Click here to close Hello! We notice that you are using Internet Explorer, which is not supported by Xenbase and may cause the site to display incorrectly. We suggest using a current version of Chrome, FireFox, or Safari.
XB-ART-59087
Proc Natl Acad Sci U S A 2022 Apr 12;11915:e2109508119. doi: 10.1073/pnas.2109508119.
Show Gene links Show Anatomy links

The CHARGE syndrome ortholog CHD-7 regulates TGF-β pathways in Caenorhabditis elegans.

Jofré DM , Hoffman DK , Cervino AS , Hahn GM , Grundy M , Yun S , Amrit FRG , Stolz DB , Godoy LF , Salvatore E , Rossi FA , Ghazi A , Cirio MC , Yanowitz JL , Hochbaum D .


???displayArticle.abstract???
CHARGE syndrome is a complex developmental disorder caused by mutations in the chromodomain helicase DNA-binding protein-7 (CHD7) and characterized by retarded growth and malformations in the heart and nervous system. Despite the public health relevance of this disorder, relevant cellular pathways and targets of CHD7 that relate to disease pathology are still poorly understood. Here we report that chd-7, the nematode ortholog of Chd7, is required for dauer morphogenesis, lifespan determination, stress response, and body size determination. Consistent with our discoveries, we found chd-7 to be allelic to scd-3, a previously identified dauer suppressor from the DAF-7/ tumor growth factor-β (TGF-β) pathway. Epistatic analysis places CHD-7 at the level of the DAF-3/DAF-5 complex, but we found that CHD-7 also directly impacts the expression of multiple components of this pathway. Transcriptomic analysis revealed that chd-7 mutants fail to repress daf-9 for execution of the dauer program. In addition, CHD-7 regulates the DBL-1/BMP pathway components and shares roles in male tail development and cuticle synthesis. To explore a potential conserved function for chd-7 in vertebrates, we used Xenopus laevis embryos, an established model to study craniofacial development. Morpholino-mediated knockdown of Chd7 led to a reduction in col2a1 messenger RNA (mRNA) levels, a collagen whose expression depends on TGF-β signaling. Both embryonic lethality and craniofacial defects in Chd7-depleted tadpoles were partially rescued by overexpression of col2a1 mRNA. We suggest that Chd7 has conserved roles in regulation of the TGF-β signaling pathway and pathogenic Chd7 could lead to a defective extracellular matrix deposition.

???displayArticle.pubmedLink??? 35394881
???displayArticle.pmcLink??? PMC9169646
???displayArticle.link??? Proc Natl Acad Sci U S A
???displayArticle.grants??? [+]

Species referenced: Xenopus laevis
Genes referenced: chd7 chrd col2a1 mcf2 scd
???displayArticle.morpholinos??? chd7 MO1


???attribute.lit??? ???displayArticles.show???
References [+] :
Ailion, Dauer formation induced by high temperatures in Caenorhabditis elegans. 2000, Pubmed