Identification and functional analysis of a novel mutation in the PAX3 gene associated with Waardenburg syndrome type I

被引:8
|
作者
Niu, Zhijie [1 ,2 ]
Li, Jiada [3 ]
Tang, Fen [4 ]
Sun, Jie [1 ,2 ]
Wang, Xueping [1 ,2 ]
Jiang, Lu [1 ,2 ]
Mei, Lingyun [1 ,2 ]
Chen, Hongsheng [1 ,2 ]
Liu, Yalan [1 ,2 ]
Cai, Xinzhang [1 ,2 ]
Feng, Yong [1 ,2 ,3 ]
He, Chufeng [1 ,2 ]
机构
[1] Cent S Univ, Xiangya Hosp, Dept Otolaryngol Head & Neck Surg, 87 Xiangya Rd, Changsha 410008, Hunan, Peoples R China
[2] Key Lab Otolaryngol Major Dis Res Hunan Prov, Changsha 410008, Hunan, Peoples R China
[3] Cent S Univ, State Key Lab Med Genet, Changsha 410078, Hunan, Peoples R China
[4] Sun Yat Sen Univ, Zhongshan Ophthalm Ctr, State Key Lab Ophthalmol, Guangzhou 510060, Guangdong, Peoples R China
基金
中国国家自然科学基金;
关键词
Mutation; PAX3; Waardenburg syndrome; Sensorineural hearing loss; Haploinsufficiency; PAIRED DOMAIN; DNA-BINDING; MITF; SOX10; HOMEODOMAIN; DISEASE;
D O I
10.1016/j.gene.2017.11.035
中图分类号
Q3 [遗传学];
学科分类号
071007 ; 090102 ;
摘要
Waardenburg syndrome type 1 (WS1) is a rare autosomal dominant genetic disorder of neural crest cells (NCC) characterized by congenital sensorineural hearing loss, dystopia canthorum, and abnormal iris pigmentation. WS1 is due to loss-of-function mutations in paired box gene 3 (PAX3). Here, we identified a novel PAX3 mutation (c.808C > G, p.R270G) in a three-generation Chinese family with WS1, and then analyzed its in vitro activities. The R270G PAX3 retained nuclear distribution and normal DNA-binding ability; however, it failed to activate MITF promoter, suggesting that haploinsufficiency may be the underlying mechanism for the mild WS1 phenotype of the study family.
引用
收藏
页码:362 / 366
页数:5
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