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PubMed · 6881855

[Congenital generalized cutis laxa].

Abstract

Congenital cutis laxa is a rare disorder of the elastic tissue in which lax skin gives a premature senile appearance. We report a new case of this disease associated with craniosynostosis. In the literature, the genetics of cutis laxa are not clear. Fleischmajer and Matus (18) considers an inherited autosomal recessive or an incomplete autosomal dominant trait, Mehregan (33) reports an autosomal recessive mode of transmission and Byers (10) an X-linked form. Among these cases, the most serious visceral involvement is the development of pulmonary emphysema. However, in cutis laxa with development retardation, variety of minor injury of the skeleton, the prognosis seems appears to be better.

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BibTeXRIS

D Lambert, F Beer, C Jeannin-Magnificat, J P Mabille, J Israël, M Lambert-Weyl, A Nivelon-Chevalier, M Alison. 1983. [Congenital generalized cutis laxa].. https://pubmed.ncbi.nlm.nih.gov/6881855/

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Generalized cutis laxa associated with heavy chain deposition disease.

BACKGROUND: Cutis laxa is a heterogeneous group of inherited and acquired disorders characterized clinically by loose skin and histologically by altered elastic tissue. Heavy chain deposition disease is a very rare monoclonal immunoglobulin disorder, distinct from multiple myeloma, in which there is production and deposition of defective immunoglobulin heavy chains without light chain deposition. OBJECTIVE: We describe a case of acquired cutis laxa associated with heavy chain deposition disease. RESULTS: A 50-year-old male presented with acute renal failure, IgG4 heavy chain deposition in the kidneys, and no evidence of multiple myeloma. Four years later, he developed generalized acquired cutis laxa, emphysema, and a peripheral polyneuropathy. On pathology, there was destruction of elastic fibers within the dermis. CONCLUSION: This case describes a previously unreported association between acquired cutis laxa and heavy chain deposition disease.

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Homozygosity for a missense mutation in fibulin-5 (FBLN5) results in a severe form of cutis laxa.

Hereditary cutis laxa comprises a heterogeneous group of connective tissue disorders characterized by loose skin and variable systemic involvement. Autosomal dominant and recessive as well as X-linked forms have been described. Some dominant forms are caused by mutations in the elastine gene (ELN). The X-linked form is now classified in the group of copper transport diseases. The genetic defect underlying the autosomal recessive (AR) forms of cutis laxa is not known. The phenotypic abnormalities recently observed in a fibulin-5 knockout mouse model are reminiscent of human AR cutis laxa type I. Both share cutis laxa, lung emphysema and arterial involvement. Molecular study of the fibulin-5 (FBLN5) gene in a large consanguineous Turkish family with four patients affected by AR cutis laxa type I demonstrated the presence of a homozygous missense mutation (T998C) in the FBLN5 gene resulting in a serine-to-proline (S227P) substitution in the fourth calcium-binding epidermal growth factor-like domain of fibulin-5 protein. This amino acid substitution is predicted to have important structural and functional consequences for normal elastogenesis. As such, we provide evidence that a genetic defect in fibulin-5 (FBLN5, also known as EVEC or DANCE) is responsible for a recessive form of cutis laxa in humans.

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