Novel Mutations Identified in the Chinese Han Population with Keratoconus by Next-Generation Sequencing. (10th February 2022)

• Record Type: Journal Article
• Authors: Chen, Binbin; Yu, Xiaoning; Zhang, Xin; Yang, Hao; Cui, Yilei; Shentu, Xingchao
• Other Names: Pellegrini Marco Academic Editor.
• Is Part Of: Journal of ophthalmology. Volume 2022(2022)
• Publication Date: 2022-02-10
• Subjects: Ophthalmology -- Periodicals; Eye Diseases; Ophthalmology; Ophthalmology; Electronic journals; Periodicals; Periodicals; Fulltext; Internet Resources; Periodicals; 617.7
• DOI: 10.1155/2022/9991910
• Languages: English
• ISSNs: 2090-004X

Abstract

Abstract : Aim . To identify novel mutations in keratoconus (KC) susceptibility genes in the Chinese Han population. Methods . A total of fifty-two patients with primary KC were recruited. Blood samples were collected, and genomic DNA was isolated from peripheral blood leukocytes. The entire coding region, intron-exon junctions, and promoter regions of sixteen known KC susceptibility genes were screened with next-generation sequencing technology. All identified variants were further confirmed using the Sanger sequencing technology. The Sorting Intolerant from Tolerant (SIFT), MutationTaster, and PolyPhen 2 programs were used to predict the effect of amino acid substitution on protein. Results . After removing twelve known SNPs (single nucleotide polymorphisms) and three variants predicted to be harmless, nine novel mutations were identified in eight of the fifty-two patients, including c.455C > T:p.P152L in FNDC3B; c.3636_3637del:p.R1212fs in COL4A4; c.5015G > T:p.R1672L, c.3798dupA:p.P1267fs, and c.28G > A:p.A10T in MPDZ; c.1940C > T:p.P647L in DOCK9; c.127_128insGGC:p.Q43delinsRQ in POLG; c.3019G > A:p.V1007I in IPO5; and c.624 + 7− > A in TGFBI. All nine mutations in the patients with KC were heterozygote. Conclusion . This study enlarged the gene profile of KC and should be further confirmed by well-powered, genome-wide association studies (GWAS) of Han Chinese patients.