Association of the CAV1-CAV2 locus with normal-tension glaucoma in Chinese and Japanese.
Lu Shi Yao, Rong Shi Song, Wu Zhenggen, Huang Chukai, Matsushita Kenji, Ng Tsz Kin, Leung Christopher K S, Kawashima Rumi, Usui Shinichi, Tam Pancy O S
AI Summary
This study found a genetic marker (rs4236601) at the CAV1-CAV2 locus linked to normal-tension glaucoma in Chinese, but not Japanese, suggesting ethnic differences in disease risk.
Abstract
Background
The CAV1-CAV2 locus has been associated with primary open-angle glaucoma (POAG) and intraocular pressure. However, its association with normal-tension glaucoma (NTG) was inconclusive. Therefore, we evaluated this association in Chinese and Japanese.
Methods
Two single-nucleotide polymorphisms (SNPs, rs4236601 and rs1052990) from previous genome-wide association studies of POAG were genotyped in a total of 2220 study subjects: a Hong Kong Chinese cohort of 537 NTG patients and 490 controls, a Shantou Chinese cohort of 102 NTG and 731 controls and an Osaka Japanese cohort of 153 NTG and 207 controls. Subgroup analysis by gender was conducted. Outcomes from different cohorts were combined using meta-analysis.
Results
SNP rs4236601 was significantly associated with NTG in the two Chinese cohorts (P meta = .0019, OR = 4.55, I 2 = 0). In contrast, rs4236601 was monomorphic in the Osaka cohort. The association of rs1052990 was insignificant in a meta-analysis combining Chinese and Japanese cohorts (P meta = .81, OR = 1.05; I 2 = 64%), and the OR tended towards opposite directions between Chinese (OR = 1.26) and Japanese (OR = 0.69). Gender-specific effects of the SNPs were not statistically significant in the logistic regression or Breslow-day tests of ORs (P > .05), although rs4236601 was significant in males (P = .0068; OR = 10.30) but not in females (P = .14; OR = 2.65) in the meta-analysis of Chinese subjects.
Conclusions
In this study, we confirmed the association of rs4236601 at the CAV1-CAV2 locus with NTG in Chinese. SNP rs4236601 is monomorphic, and rs1052990 tends towards a different direction in the Japanese cohort. Further studies are warranted to verify the ethnic difference and gender-specific effects of this locus.
MeSH Terms
Shields Classification
Key Concepts5
SNP rs4236601 was significantly associated with normal-tension glaucoma (NTG) in two Chinese cohorts (P meta = .0019, OR = 4.55, I 2 = 0) comprising 537 NTG patients and 490 controls from Hong Kong and 102 NTG and 731 controls from Shantou.
SNP rs4236601 was monomorphic in the Osaka Japanese cohort of 153 NTG and 207 controls, suggesting an ethnic difference in its association with normal-tension glaucoma.
The association of SNP rs1052990 with normal-tension glaucoma was insignificant in a meta-analysis combining Chinese and Japanese cohorts (P meta = .81, OR = 1.05; I 2 = 64%), with the OR tending towards opposite directions between Chinese (OR = 1.26) and Japanese (OR = 0.69).
Gender-specific effects of SNPs rs4236601 and rs1052990 were not statistically significant in logistic regression or Breslow-day tests of ORs (P > .05) for normal-tension glaucoma across Chinese and Japanese cohorts, although rs4236601 was significant in males (P = .0068; OR = 10.30) but not in females (P = .14; OR = 2.65) in the meta-analysis of Chinese subjects.
Two single-nucleotide polymorphisms (SNPs, rs4236601 and rs1052990) from previous genome-wide association studies of primary open-angle glaucoma were genotyped in a total of 2220 study subjects for their association with normal-tension glaucoma.
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