Heterozygous pathogenic variants in CWF19L1 in a Chinese family with spinocerebellar ataxia, autosomal recessive 17. Issue 12 (10th November 2022)

• Record Type: Journal Article
• Authors: Ruan, Miaohua; Wang, Hongwei; Zhu, Mianmian; Sun, Rongyue; Shi, Jiamin; Wang, Qiu; Chen, Yuan; Wang, Yihong; Wang, Dan
• Is Part Of: Journal of clinical laboratory analysis. Volume 36:Issue 12(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-11-10
• Subjects: autosomal recessive cerebellar ataxia -- compound heterozygous variants -- CWF19L1 -- novel variant; Diagnosis, Laboratory -- Periodicals; Medical laboratory technology -- Periodicals; 616
• DOI: 10.1002/jcla.24767
• Languages: English
• ISSNs: 0887-8013

Abstract

Abstract: Background: CWF19L1 i s responsible for spinocerebellar ataxia, autosomal recessive 17, which presents with cerebellar ataxia, and atrophy. Here, we report novel compound heterozygous variants of CWF19L1 in a Chinese family with progressive ataxia and mental retardation of unknown etiology by analyzing clinical characteristics and genetic variations. Methods: Clinical profiles and genomic DNA extracts of family members were collected. Whole‐exome and Sanger sequencing were performed to detect associated genetic variants. Pathogenicity prediction and conservation analysis of the identified variants were performed using bioinformatics tools. Results: We identified heterozygous variants at the invariant +2 position (c.1555_c.1557delGAG in exon 14 and c.1070G > T in exon 11) of the CWF19L1 gene. Two novel heterozygous variants of the CWF19L1 gene were identified in the CWF19L1 gene associated with autosomal recessive cerebellar ataxia. Conclusion: Our results suggest that CWF19L1 variants may be a novel cause of recessive ataxia with developmental delay. Whole‐exome sequencing is an efficient tool for screening variants associated with the disease. This case report may help diagnose and identify the causes of other ataxias, leading to novel therapies, especially in China. This finding enriches the variant spectrum of the CWF19L1 gene and lays the foundation for future studies on the correlation between genotype and phenotype. Abstract : In this article, we report novel compound heterozygous variants of CWF19L1 in a Chinese family with progressive ataxia and mental retardation of unknown etiology by analyzing clinical characteristics and genetic variation. Whole‐exome sequencing and Sanger sequencing were used to detect associated genetic variants. We identified heterozygous variants at the invariant +2 position (c.1555_c.1557delGAG) in exon 14 and (c.1070G > T) in exon 11 of the CWF19L1 gene. Pathogenicity prediction and conservation analysis of the identified variants were performed with bioinformatics tools. This finding enriches the variant spectrum of the CWF19L1 gene and lays the foundation for future studies on the correlation between genotype and phenotype.