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Article

Identification of CRB1 mutations in two Chinese consanguineous families exhibiting autosomal recessive retinitis pigmentosa

  • Authors:
    • Xiaoxin Guo
    • Jie Li
    • Qingwei Wang
    • Yi Shu
    • Jin Wang
    • Lijia Chen
    • Houbin Zhang
    • Yi Shi
    • Jiyun Yang
    • Fang Lu
    • Li Jiang
    • Chao Qu
    • Bo Gong
  • View Affiliations / Copyright

    Affiliations: Key Laboratory for Human Disease Gene Study of Sichuan Province and Department of Laboratory Medicine, Sichuan Academy of Medical Sciences and Sichuan Provincial People's Hospital, School of Medicine, University of Electronic Science and Technology of China, Chengdu, Sichuan 610072, P.R. China, Department of Ophthalmology, Sichuan Academy of Medical Sciences and Sichuan Provincial People's Hospital, School of Medicine, University of Electronic Science and Technology of China, Chengdu, Sichuan 610072, P.R. China, Department of Ophthalmology and Visual Sciences, The Chinese University of Hong Kong, Hong Kong, SAR, P.R. China
  • Pages: 2922-2928
    |
    Published online on: July 12, 2019
       https://doi.org/10.3892/mmr.2019.10495
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Abstract

Retinitis pigmentosa (RP) is a leading cause of inherited blindness characterized by progressive loss of retinal photoreceptor cells. The present study aimed to identify the causative gene mutations in two Chinese families with autosomal recessive retinitis pigmentosa (arRP). Two Chinese consanguineous arRP families (RP‑2284 and RP‑2360) were recruited in this study, involving totally three affected and 25 unaffected members. All the affected members underwent a complete ophthalmic examination, including fundus photography, multifocal electroretinography (ERG) and full field ERG. Exome sequencing was performed on the three RP patients in the two families, followed by direct Sanger sequencing in all the family members and in 1,260 unrelated controls for validation of the mutations identified. Two homozygous missense mutations in the crumbs homolog 1 (CRB1) gene, which is known to cause severe retinal dystrophies, were found to be related to the phenotype of the two arRP families. The homozygous missense mutation c.1997 T>A in CRB1 was detected in two patients in the RP‑2284 family. The proband in the RP‑2360 family was the only RP patient and was found to carry the novel homozygous missense mutation c.2426 A>C in CRB1. The two mutations were heterozygous or absent in the other healthy family members, and they were absent in the 1,260 controls. The amino acid changes in the CRB1 protein affected by the two mutations were predicted to be damaging by Polyohen‑2. Our study reported two CRB1 mutations causing arRP in two Chinese families, which expands the CRB1 mutation spectrum of RP in the Chinese population and emphasizes the causative role of CRB1 in RP.
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Copy and paste a formatted citation
Spandidos Publications style
Guo X, Li J, Wang Q, Shu Y, Wang J, Chen L, Zhang H, Shi Y, Yang J, Lu F, Lu F, et al: Identification of CRB1 mutations in two Chinese consanguineous families exhibiting autosomal recessive retinitis pigmentosa. Mol Med Rep 20: 2922-2928, 2019.
APA
Guo, X., Li, J., Wang, Q., Shu, Y., Wang, J., Chen, L. ... Gong, B. (2019). Identification of CRB1 mutations in two Chinese consanguineous families exhibiting autosomal recessive retinitis pigmentosa. Molecular Medicine Reports, 20, 2922-2928. https://doi.org/10.3892/mmr.2019.10495
MLA
Guo, X., Li, J., Wang, Q., Shu, Y., Wang, J., Chen, L., Zhang, H., Shi, Y., Yang, J., Lu, F., Jiang, L., Qu, C., Gong, B."Identification of CRB1 mutations in two Chinese consanguineous families exhibiting autosomal recessive retinitis pigmentosa". Molecular Medicine Reports 20.3 (2019): 2922-2928.
Chicago
Guo, X., Li, J., Wang, Q., Shu, Y., Wang, J., Chen, L., Zhang, H., Shi, Y., Yang, J., Lu, F., Jiang, L., Qu, C., Gong, B."Identification of CRB1 mutations in two Chinese consanguineous families exhibiting autosomal recessive retinitis pigmentosa". Molecular Medicine Reports 20, no. 3 (2019): 2922-2928. https://doi.org/10.3892/mmr.2019.10495
Copy and paste a formatted citation
x
Spandidos Publications style
Guo X, Li J, Wang Q, Shu Y, Wang J, Chen L, Zhang H, Shi Y, Yang J, Lu F, Lu F, et al: Identification of CRB1 mutations in two Chinese consanguineous families exhibiting autosomal recessive retinitis pigmentosa. Mol Med Rep 20: 2922-2928, 2019.
APA
Guo, X., Li, J., Wang, Q., Shu, Y., Wang, J., Chen, L. ... Gong, B. (2019). Identification of CRB1 mutations in two Chinese consanguineous families exhibiting autosomal recessive retinitis pigmentosa. Molecular Medicine Reports, 20, 2922-2928. https://doi.org/10.3892/mmr.2019.10495
MLA
Guo, X., Li, J., Wang, Q., Shu, Y., Wang, J., Chen, L., Zhang, H., Shi, Y., Yang, J., Lu, F., Jiang, L., Qu, C., Gong, B."Identification of CRB1 mutations in two Chinese consanguineous families exhibiting autosomal recessive retinitis pigmentosa". Molecular Medicine Reports 20.3 (2019): 2922-2928.
Chicago
Guo, X., Li, J., Wang, Q., Shu, Y., Wang, J., Chen, L., Zhang, H., Shi, Y., Yang, J., Lu, F., Jiang, L., Qu, C., Gong, B."Identification of CRB1 mutations in two Chinese consanguineous families exhibiting autosomal recessive retinitis pigmentosa". Molecular Medicine Reports 20, no. 3 (2019): 2922-2928. https://doi.org/10.3892/mmr.2019.10495
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