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A novel mutation of COL7A1 in a Chinese DEB‐Pt family and review of the literature
Author(s) -
Jin Ling,
Li Zhi,
Xin Cong,
Tang Lili,
Zhang Xuejun,
Zhang Bo,
Yang Sen
Publication year - 2020
Publication title -
journal of cosmetic dermatology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.626
H-Index - 44
eISSN - 1473-2165
pISSN - 1473-2130
DOI - 10.1111/jocd.13172
Subject(s) - missense mutation , anchoring fibrils , exon , mutation , epidermolysis bullosa , scars , dermis , histopathology , genetics , biology , mutation testing , gene , pathology , medicine , dermatology , ultrastructure
Background Pretibial dystrophic epidermolysis bullosa (DEB‐Pt) is an extremely rare subtype of dystrophic epidermolysis bullosa (DEB) characterized by blistering and scar formation. The pathogenesis of the disease is mainly due to the mutation of COL7A1 gene encoding type VII collagen fibers, resulting in the destruction of the anchoring structure of the epidermis and dermis. Aims The purpose of this study was to discover the major mutations in DEB‐Pt by studying this family and reviewing the literature on DEB‐Pt. Patients/Methods We examined the patients by clinical manifestations and histopathology, extracted DNA from blood samples from 7 individuals in the family via FlexiGene DNA Kit, and then sequenced the samples using whole‐exon sequencing (WES). Result Characteristic clinical manifestations such as blisters and scars were found in the patients. Genetic analysis revealed a missense mutation in exon 87(c.6860G>A) of COL7A1 gene, which has never been reported before. Conclusion The discovery of the new mutation extends the COL7A1 mutation database. We also reviewed all the mutation in DEB‐Pt from relevant literature at home and abroad. This will facilitate the molecular diagnosis, treatment, and prognosis of DEB‐Pt.