Z Wu 1,2 , M Zhong 3 , M Li 4 , H Huang 4 , J Liao 1,2 , A Lu 5 , K Guo 1,2 , N Ma 1,2 , J Lin 1,2 , J Duan 6 , L Liu 4 , F Xu 4 , Z Zhong 1,2 , J Chen 1,2 Show Affiliations »
Abstract
BACKGROUND: To screen variants in pre-mRNA Splicing genes in 95 Chinese autosomal dominant retinitis pigmentosa (adRP) families. METHODS: Clinical examination and pedigree analysis were performed. Targeted exome sequencing (TES) and / or Sanger sequencing were performed to detect the variants in genes of Splicing factors and conduct intra-familiar segregation analysis with DNA available. In silico analysis was performed to predict pathogenicity of variants in protein level and in vitro splicing assays were performed to compare splicing variants with their corresponding wildtype about their splicing effect. RESULTS: In this study, total nine different variants were identified in PRPF31, SNRNP200, and PRPF8 respectively, including six PRPF31 variants [five novel variants 322+1G>A, c.527+2T>G, c.590T>C(p.Leu197Pro), c.1035_1036insGC (p.Pro346Argfs X18), and c.1224dupG (p.Gln409AlafsX66) plus one reported variant c.1060C>T (p.Arg354X)], a recurrent PRPF8 variant c.6930G>T (p.Arg2310Ser), two SNRNP200 variants [one heterozygous and homozygous SNRNP200 recurrent variant c.3260G>A (p.Ser1087Leu), and a reported heterozygous c.2042G>A(p.Arg681His)]. In family 20009, incomplete penetrance was observed. A novel PRPF31 missense variant c.590T>C (p.Leu197Pro) was predicted to be pathogenic in protein level via in silico analysis and in vitro splicing assay demonstrated that two novel splicing PRPF31 variants c.322+1G>A and c.527+2T>G affect splicing compared with the wildtype. CONCLUSIONS: In our studies, RP-causing variants of pre-mRNA Splicing genes (PRPF31, PRPF8 and SNRNP200) were identified in nine of the ninety-five adRP families respectively, which extend the spectra of RP variant and phenotype. And we provide the first example that SNRNP200-related RP can be caused by both heterozygous and homozygous variants of this gene. Copyright© Bentham Science Publishers; For any queries, please email at epub@benthamscience.org.
BACKGROUND: To screen variants in pre-mRNA Splicing genes in 95 Chinese autosomal dominant retinitis pigmentosa (adRP) families. METHODS: Clinical examination and pedigree analysis were performed. Targeted exome sequencing (TES) and / or Sanger sequencing were performed to detect the variants in genes of Splicing factors and conduct intra-familiar segregation analysis with DNA available. In silico analysis was performed to predict pathogenicity of variants in protein level and in vitro splicing assays were performed to compare splicing variants with their corresponding wildtype about their splicing effect. RESULTS: In this study, total nine different variants were identified in PRPF31 , SNRNP200 , and PRPF8 respectively, including six PRPF31 variants [five novel variants 322+1G>A, c.527+2T>G, c.590T>C(p.Leu197Pro ), c.1035_1036insGC (p.Pro346Argfs X18), and c.1224dupG (p.Gln409AlafsX66 ) plus one reported variant c.1060C>T (p.Arg354X )], a recurrent PRPF8 variant c.6930G>T (p.Arg2310Ser ), two SNRNP200 variants [one heterozygous and homozygous SNRNP200 recurrent variant c.3260G>A (p.Ser1087Leu ), and a reported heterozygous c.2042G>A(p.Arg681His )]. In family 20009, incomplete penetrance was observed. A novel PRPF31 missense variant c.590T>C (p.Leu197Pro ) was predicted to be pathogenic in protein level via in silico analysis and in vitro splicing assay demonstrated that two novel splicing PRPF31 variants c.322+1G>A and c.527+2T>G affect splicing compared with the wildtype. CONCLUSIONS: In our studies, RP-causing variants of pre-mRNA Splicing genes (PRPF31 , PRPF8 and SNRNP200 ) were identified in nine of the ninety-five adRP families respectively, which extend the spectra of RP variant and phenotype. And we provide the first example that SNRNP200 -related RP can be caused by both heterozygous and homozygous variants of this gene. Copyright© Bentham Science Publishers; For any queries, please email at epub@benthamscience.org.
Entities: Disease
Gene
Mutation
Keywords:
PRPF31; PRPF8; Retinitis pigmentosa; SNRNP200; splicing factors; variant.
Mesh： See more »
Substances： See more »
Year: 2018
PMID： 30360737 DOI： 10.2174/1566524018666181024160452
Source DB: PubMed Journal: Curr Mol Med ISSN： 1566-5240 Impact factor: 2.222