ReviewJournal of human genetics2025
A novel case of autosomal-dominant cutis laxa caused by a de novo likely pathogenic variant in ALDH18A1: case report and literature review.
Review in Journal of human genetics, 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
Cutis laxa is a highly heterogeneous connective tissue disorder characterized by progressively loose skin, often accompanied by systemic involvement. Autosomal dominant cutis laxa (ADCL) has been linked to variants in several genes, including ALDH18A1, which encodes Δ1-pyrroline-5-carboxylate synthetase, a key enzyme in proline and collagen metabolism. We report a novel case of ADCL in a 1.6-year-old patient presenting with growth delay, hypotonia, joint laxity, lax skin, cataract, dysmorphic features, microcephaly, cranial vessel tortuosity, hip dislocation, and psychomotor retardation. Whole-exome sequencing revealed a de novo heterozygous c.400 T > C (p.Ser134Pro) substitution in the ALDH18A1 gene. This variant has not been previously reported, and it is the first report of an individual with ALDH18A1-ADCL due to a substitution at a highly conserved residue, p.Ser134 of the P5CS protein. Our findings expand the mutational spectrum of ALDH18A1-related ADCL and highlight the importance of genetic testing in diagnosing rare disorders.
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