ArticleJournal of cell science2025
A conserved domain of Cfap298 governs left-right symmetry breaking in vertebrates.
Article in Journal of cell science, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Cfap298 is a highly conserved gene required for ciliary motility and dynein arm assembly, with known roles in left-right (LR) patterning in zebrafish and links to human ciliopathies. Here, we describe a Cfap298 mutant allele, Cfap298ΔΔS, which selectively disrupts LR axis establishment in mice. Mutant embryos display organ laterality defects and abnormal Nodal, Pitx2 and Lefty1 expression, consistent with an early disruption in LR symmetry breaking. LR asymmetry is established by leftward fluid flow in the node, generated by planar-polarized cilia. Although cfap298 mutations are reported to affect planar polarity, we did not observe changes in cilia position, length or CELSR1 localization within the node, suggesting that Cfap298ΔΔS functions at the level of cilia motility. Accordingly, cilia lining the trachea of Cfap298ΔΔS mutants fail to beat or beat incorrectly. Expression of the Cfap298ΔΔS variant in zebrafish partially rescues body curvature defects but fails to rescue LR defects of cfap298 (kurly) loss-of-function mutants. These results confirm a conserved role for Cfap298 in mammalian LR patterning and identify a previously unreported region of CFAP298 with a conserved and essential role in cilia motility.
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