Two novel mutations in the bestrophin-1 gene and associated clinical observations in patients with best vitelliform macular dystrophy.
The purpose of the current study was to investigate the 11 bestrophin-1 (BEST1) exons in patients with best vitelliform macular dystrophy (BVMD), and to characterize the associated clinical features. Complete ophthalmic examinations were conducted on two families, and two family members were diagnosed with BVMD. Genomic DNA was extracted from the leukocytes of peripheral blood collected from the patients and their family members, in addition to 100 unrelated control subjects recruited from the same population. The polymerase chain reaction was used to amplify a total of 11 exons of the BEST1 gene, which were directly sequenced. Ophthalmic examinations, including best-corrected visual acuity, slit-lamp examination, fundus examination, fundus photography and fluorescein angiography imaging, as well as anterior segment analysis with Pentacam and optical coherence tomography, were conducted. The patients exhibited yellowish lesions in the macular area. A heterozygous mutation c.910_912delGAT (p.304del Asp) in exon 7 was identified in Case 1. A heterozygous BEST1 missense mutation c.685T>G (p.Trp229Gly) in exon 5 was identified in Case 2, but not in any of the unaffected family members or normal controls. Although BEST1 gene mutations and polymorphisms have previously been reported in various ethnic groups, the current study identified, for the first time to the best of our knowledge, two novel BEST1 gene mutations in patients with BVMD.
State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat‑Sen University, Guangzhou, Guangdong 510060, P.R. China.
Ying
Y
Lin
Guangdong Provincial Key Laboratory of Occupational Diseases Prevention and Treatment, Guangdong Hospital for Occupational Disease Prevention and Treatment, Guangzhou, Guangdong 510300, P.R. China.
Hongbin
H
Gao
State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat‑Sen University, Guangzhou, Guangdong 510060, P.R. China.
Yuhua
Y
Liu
State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat‑Sen University, Guangzhou, Guangdong 510060, P.R. China.
Xuanwei
X
Liang
State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat‑Sen University, Guangzhou, Guangdong 510060, P.R. China.
Xialin
X
Liu
State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat‑Sen University, Guangzhou, Guangdong 510060, P.R. China.
Zhonghao
Z
Wang
State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat‑Sen University, Guangzhou, Guangdong 510060, P.R. China.
Wanjun
W
Zhang
State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat‑Sen University, Guangzhou, Guangdong 510060, P.R. China.
Jiangna
J
Chen
State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat‑Sen University, Guangzhou, Guangdong 510060, P.R. China.
Zhuoling
Z
Lin
State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat‑Sen University, Guangzhou, Guangdong 510060, P.R. China.
Xinhua
X
Huang
State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat‑Sen University, Guangzhou, Guangdong 510060, P.R. China.
Yizhi
Y
Liu
D001483:Base Sequence; D000075002:Bestrophins; D016022:Case-Control Studies; D018118:Chloride Channels / Q000235:genetics* / Q000378:metabolism; D005091:Exons; D005136:Eye Proteins / Q000235:genetics* / Q000378:metabolism; D005260:Female; D015870:Gene Expression; D006579:Heterozygote; D006801:Humans; D007963:Leukocytes, Mononuclear / Q000737:chemistry / Q000378:metabolism; D008297:Male; D008969:Molecular Sequence Data; D009154:Mutation; D010375:Pedigree; D012160:Retina / Q000378:metabolism* / Q000473:pathology; D017422:Sequence Analysis, DNA; D057826:Vitelliform Macular Dystrophy / Q000235:genetics* / Q000378:metabolism / Q000473:pathology; D055815:Young Adult
C113133:BEST1 protein, human; D000075002:Bestrophins; D018118:Chloride Channels; D005136:Eye Proteins