Mutations in PLOD3, encoding lysyl hydroxylase 3, cause a complex connective tissue disorder including recessive dystrophic epidermolysis bullosa-like blistering phenotype with abnormal anchoring fibrils and type VII collagen deficiency

Hassan Vahidnezhad, Leila Youssefian, Amir Hossein Saeidian, Andrew Touati, Sara Pajouhanfar, Taghi Baghdadi, Azam Ahmadi Shadmehri, Cecilia Giunta, Marius Kraenzlin, Delfien Syx, Fransiska Malfait, Cristina Has, Su M. Lwin, Razieh Karamzadeh, Lu Liu, Alyson Guy, Mohammad Hamid, Ariana Kariminejad, Sirous Zeinali, John A. McGrathJouni Uitto

研究成果: Article同行評審

47 引文 斯高帕斯(Scopus)

摘要

Epidermolysis bullosa (EB), the paradigm of heritable skin fragility disorders, is associated with mutations in as many as 20 distinct genes. One of the clinical variants, recessive dystrophic EB (RDEB), demonstrates sub-lamina densa blistering accompanied by alterations in anchoring fibrils due to mutations in COL7A1. In this study, we characterized a patient with widespread connective tissue abnormalities, including skin blistering similar to that in RDEB. Whole exome sequencing, combined with genome-wide homozygosity mapping, identified a homozygous missense mutation in PLOD3 encoding lysyl hydroxylase 3 (LH3). No mutations in COL7A1, the gene previously associated with RDEB, were detected. The level of LH3 was dramatically reduced in the skin and fibroblast cultures from the patient. The blistering in the skin occurred below the lamina densa and was associated with variable density and morphology of anchoring fibrils. The level of type VII collagen expression in the skin was markedly reduced. Analysis of hydroxylysine and its glycosylated derivatives (galactosyl-hydroxylysine and glucosyl-galactosyl-hydroxylysine) revealed marked reduction in glycosylated hydroxylysine. Collectively, these findings indicate that PLOD3 mutations can result in a dystrophic EB-like phenotype in the spectrum of connective tissue disorders and add it to the list of candidate genes associated with skin fragility.

原文English
頁(從 - 到)91-106
頁數16
期刊Matrix Biology
81
DOIs
出版狀態Published - 2019 8月

All Science Journal Classification (ASJC) codes

  • 分子生物學

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