Hu, WeiShi, XianLi, HongwenChen, LuzhuWang, TingmeiDong, YingyingZhang, YanhongHu, ManLiu, XiaoliZhang, CaieLiu, DongxianDeng, Yunhua2020-01-022020-01-022019-01Hu Wei, Shi Xian, Li Hongwen, Chen Luzhu, Wang Tingmei, Dong Yingying, Zhang Yanhong, Hu Man, Liu Xiaoli, Zhang Caie, Liu Dongxian, Deng Yunhua. Four novel mutations of ADAR1 in Chinese patients with dyschromatosis symmetrica hereditaria. Indian Journal of Dermatology, Venereology and Leprology. 2019 Jan; 85(1): 69-730378-63230973-3922http://imsear.searo.who.int/handle/123456789/192441Background: Novel mutations in adenosine deaminase acting on RNA 1 gene (ADAR1) are responsible for dyschromatosis symmetrica hereditaria (DSH). DSH patients display a mixture of hyperpigmented and hypopigmented macules on the dorsal aspects of the extremities, and freckle-like macules on the face. Aims: To provide new evidence for further study of the etiopathogenisis of DSH. Methods: Genomic DNA was extracted and used as a template for the polymerase chain reaction (PCR) amplification of all 15 coding exons as well as intron-exon boundaries of ADAR1. The PCR products were sequenced directly. Results: We identified eight mutations of ADAR1 in four Chinese pedigrees and four individual patients, which were c.2722G>T, p.(Asp908Tyr), c.1657delA, p.(Ser553fs), c.2563_2564delCT, p.(Leu855fs), c.526T>G, p.(Leu176Val) as well as four previously reported mutations c. 3363_3364insT, p.(Lys1122fs), c. 2865_2866delGT, p.(Val955fs), c.1630C>T, p.(Arg544X), and c.2894C>T, p.(Pro965Leu). In silico analysis predicted that all the mutations reported were pathogenic. Limitations: We did not study how ADAR1 played its role in DSH. So, the exact pathogenic mechanism of ADAR1 in DSH patients wasn't clarified in this study. Conclusion: We found four novel ADAR1 mutations in this study. Our results enlarge the database on ADAR1 mutations associated with DSH.ADAR1DNA sequencingmutationdyschromatosis symmetrica hereditariaJournal ArticleIndiaDepartment of Dermatology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, ChinaDepartment of Dermatology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030; Department of Dermatology, Huangshi Central Hospital, Huangshi 435000, ChinaDepartment of Dermatology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology; Department of Dermatology, The First People's Hospital of Jiangxia District, Wuhan 430030, ChinaDepartment of Anesthesiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China