The apolipoprotein E ε4 allele is unlikely to be a major risk factor of age-related macular degeneration in Chinese

Apolipoprotein E (ApoE) is a major transporter of lipids and cholesterol in the nervous system. Age-related macular degeneration (ARMD), characterized by drusen containing lipids, was reported to show a lower frequency of the ApoE epsilon 4 allele than control subjects. We sought to examine the association of this polymorphism with ARMD in Hong Kong Chinese. Among 98 ARMD subjects, the frequency of epsilon 4 carriers showed a trend toward a decrease compared to controls, but it was not significant (11.2 vs. 15.0%, p < 0.52), The association of epsilon 4 with an apparent reduced risk of ARMD was reported previously in the exudative form of the disease, however among 39 exudative ARMD patients there was also no significant difference in epsilon 4 frequency (12.8%, p < 0.93), The lack of a statistically significant effect of epsilon 4 may be due to the lower frequency of epsilon 4 in Chinese than Europeans. Thus we cannot exclude a possible effect of this allele on ARMD risk, but we can conclude that this allele is likely not a major factor influencing ARMD risk in the Chinese. Copyright (C) 2000 S. Karger AG. Basel.