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(Investigative Ophthalmology and Visual Science. 2003;44:1012-1015.)
© 2003 by The Association for Research in Vision and Ophthalmology, Inc.
DOI:  10.1167/iovs.02-0058
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TGFß-Induced Factor: A Candidate Gene for High Myopia

Dennis Shun Chiu Lam, Wing Shan Lee, Yuk Fai Leung, Pancy Oi Sin Tam, Dorothy S. P. Fan, Bao Jian Fan, and Chi Pui Pang

From the Department of Ophthalmology and Visual Sciences, The Chinese University of Hong Kong, Kowloon, Hong Kong.

PURPOSE. To investigate the coding exons of transforming growth factor (TGF)-ß–induced factor (TGIF) for mutations in Chinese patients with high myopia.

METHODS. Seventy-one individuals with high myopia of -6.00 D or less and 105 control subjects were screened by DNA sequencing for sequence alterations. Univariate analysis and logistic regression were performed to identify single-nucleotide polymorphisms (SNPs) and their interactions in TGIF that may be associated with myopia.

RESULTS. Six SNPs showed a significant difference (P < 0.05) between patient and control subject in univariate analysis. Four of them cause codon changes: G223R, G231S, P241T, and A262G. Among all the SNPs that entered multivariate analysis, only 657(T->G) showed statistical significance in the logistic regression model (odds ratio 0.133; 95% confidence interval 0.037–0.488; P = 0.002).

CONCLUSIONS. TGIF is a probable candidate gene for high myopia. Further studies are needed to identify the underlying mechanism.




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