Gene mutation spectrum analysis of retinitis pigmentosa patients in Ningxia Region of China
10.3760/cma.j.issn.2095-0160.2019.09.013
- VernacularTitle: 中国宁夏地区视网膜色素变性患者基因突变频谱分析
- Author:
Weining RONG
1
;
Rui QI
;
Xiaoguang WANG
;
Xinhe FANG
;
Xunlun SHENG
Author Information
1. Ningxia Eye Hospital, People's Hospital of Ningxia Hui Autonomous Region, First Affiliated Hospital of Northwest University for Nationalities, Ningxia Clinical Research Center on Diseases of Blindness in Eye, Ningxia 750001, China
- Publication Type:Clinical Trail
- Keywords:
Retinitis pigmentosa;
Gene detection;
Ningxia, China
- From:
Chinese Journal of Experimental Ophthalmology
2019;37(9):750-754
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To analysis the gene mutation spectrum of retinitis pigmentosa (RP) patients in Ningxia Region of China.
Methods:Fifty-five pedigrees and 74 sporadic RP patients were included in Ningxia Eye Hospital from January 2015 to December 2016.Two hundred unrelated healthy adults were enrolled as normal controls during the same period.The clinical features of patients and their family members were evaluated by ophthalmic examinations, including visual acuity, best corrected visual acuity, fundus examination, optical coherence tomography, fundus fluorescein angiography, and visual field and electroretinogram.The next generation sequencing, PCR and direct sequencing were used to confirm the pathogenic mutation.This study was approved by Ethic Committee of the Ningxia Eye Hospital (NO.20150107), and informed consent was obtained from each subject.
Results:The mutations were detected in 37 RP pedigrees, 8 pedigrees showed autosomal dominant inheritance and 6 pathogenic genes were confirmed, all the autosomal dominant RP (ADRP) patients carried a single heterozygous mutation.Twenty-five pedigrees were autosomal recessive RP (ARRP) and 12 pathogenic genes were confirmed.Among ARRP patients, the mutations rate of USH2A gene was the highest, accounting for 28% (7/25), EYS gene and MYO7A gene accounted for 12% (3/25). Four X-linked RP (XLRP) pedigrees carried the homozygous mutations on RPGR gene.Twenty-five disease-causing genes were detected in 49 sporadic RP patients.The mutation rate of USH2A gene was the highest, accounting for 26.5% (13/49), followed by RP1 gene, accounting for 8.1% (4/49).
Conclusions:Recessive inheritance is the most common cause of RP.USH2A gene is the main pathogenic gene of RP in Ningxia region of China.
