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Article Open Access

Genetic diagnosis of a rare COL7A1 variant causing dystrophic epidermolysis bullosa pruriginosa through whole‑exome sequencing

  • Authors:
    • Yanhui Yang
    • Yangmin Gao
    • Mengna Zhang
    • Hua Qian
    • Ke Zhao
    • Weijuan Wang
    • Yanxiu Ma
    • Dan Zhang
    • Xiaoguang Li
    • Fengming Hu
    • Xiaoming Sun
  • View Affiliations / Copyright

    Affiliations: Key Laboratory of Aging and Cancer Biology, Department of Immunology and Pathogen Biology, School of Basic Medical Sciences, Hangzhou Normal University, Hangzhou, Zhejiang 311121, P.R. China, Jiangxi Provincial Clinical Research Center for Skin Diseases, Dermatology Hospital of Jiangxi Province, The Affiliated Dermatology Hospital of Nanchang University, Nanchang, Jiangxi 330200, P.R. China
    Copyright: © Yang et al. This is an open access article distributed under the terms of Creative Commons Attribution License.
  • Article Number: 502
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    Published online on: September 11, 2023
       https://doi.org/10.3892/etm.2023.12201
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Abstract

Dystrophic epidermolysis bullosa pruriginosa (DEB‑Pr) is a rare subtype of inherited DEB. In the present study, whole‑exome sequencing was conducted on 12 individuals from the same affected family and a rare heterozygous variation was identified in the collagen type VII, α1 (COL7A1) gene, namely c.6859G>A (p.Gly2287Arg). Subsequently, this heterozygous variant was confirmed using Sanger sequencing of individual plasma cell‑free DNA (cfDNA) and it was demonstrated for the first time, to the best of our knowledge, that COL7A1 exons can be amplified from plasma cfDNA. Within the large pedigree examined, 14 out of 18 individuals carried the variant, 3 carried the wild type, and one exceptional case, III‑9, showed no disease symptoms despite carrying the disease variant. A general association between genotype and phenotype was established. Of note, the mutation landscape indicated that this G2287R variant is primarily reported in Asian countries. In silico structure prediction suggested that the residue resulting from the mutation may affect collagen protein stability. In conclusion, the present study provides evidence for the involvement of the COL7A1 G2287R gene variant in the development of DEB‑Pr and highlights the potential utility of cfDNA in genetic disease diagnosis.
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Copy and paste a formatted citation
Spandidos Publications style
Yang Y, Gao Y, Zhang M, Qian H, Zhao K, Wang W, Ma Y, Zhang D, Li X, Hu F, Hu F, et al: Genetic diagnosis of a rare COL7A1 variant causing dystrophic epidermolysis bullosa pruriginosa through whole‑exome sequencing. Exp Ther Med 26: 502, 2023.
APA
Yang, Y., Gao, Y., Zhang, M., Qian, H., Zhao, K., Wang, W. ... Sun, X. (2023). Genetic diagnosis of a rare COL7A1 variant causing dystrophic epidermolysis bullosa pruriginosa through whole‑exome sequencing. Experimental and Therapeutic Medicine, 26, 502. https://doi.org/10.3892/etm.2023.12201
MLA
Yang, Y., Gao, Y., Zhang, M., Qian, H., Zhao, K., Wang, W., Ma, Y., Zhang, D., Li, X., Hu, F., Sun, X."Genetic diagnosis of a rare COL7A1 variant causing dystrophic epidermolysis bullosa pruriginosa through whole‑exome sequencing". Experimental and Therapeutic Medicine 26.5 (2023): 502.
Chicago
Yang, Y., Gao, Y., Zhang, M., Qian, H., Zhao, K., Wang, W., Ma, Y., Zhang, D., Li, X., Hu, F., Sun, X."Genetic diagnosis of a rare COL7A1 variant causing dystrophic epidermolysis bullosa pruriginosa through whole‑exome sequencing". Experimental and Therapeutic Medicine 26, no. 5 (2023): 502. https://doi.org/10.3892/etm.2023.12201
Copy and paste a formatted citation
x
Spandidos Publications style
Yang Y, Gao Y, Zhang M, Qian H, Zhao K, Wang W, Ma Y, Zhang D, Li X, Hu F, Hu F, et al: Genetic diagnosis of a rare COL7A1 variant causing dystrophic epidermolysis bullosa pruriginosa through whole‑exome sequencing. Exp Ther Med 26: 502, 2023.
APA
Yang, Y., Gao, Y., Zhang, M., Qian, H., Zhao, K., Wang, W. ... Sun, X. (2023). Genetic diagnosis of a rare COL7A1 variant causing dystrophic epidermolysis bullosa pruriginosa through whole‑exome sequencing. Experimental and Therapeutic Medicine, 26, 502. https://doi.org/10.3892/etm.2023.12201
MLA
Yang, Y., Gao, Y., Zhang, M., Qian, H., Zhao, K., Wang, W., Ma, Y., Zhang, D., Li, X., Hu, F., Sun, X."Genetic diagnosis of a rare COL7A1 variant causing dystrophic epidermolysis bullosa pruriginosa through whole‑exome sequencing". Experimental and Therapeutic Medicine 26.5 (2023): 502.
Chicago
Yang, Y., Gao, Y., Zhang, M., Qian, H., Zhao, K., Wang, W., Ma, Y., Zhang, D., Li, X., Hu, F., Sun, X."Genetic diagnosis of a rare COL7A1 variant causing dystrophic epidermolysis bullosa pruriginosa through whole‑exome sequencing". Experimental and Therapeutic Medicine 26, no. 5 (2023): 502. https://doi.org/10.3892/etm.2023.12201
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