Longevity-associated mitochondrial DNA 5178 A/C polymorphism is associated with intraocular pressure in Japanese men.
BACKGROUND
Mitochondrial DNA 5178 adenine/cytosine (mt5178 A/C) polymorphism has been reported to be associated with longevity in Japanese individuals, with experimental findings concluding that mt5178 A is an anti-atherogenic genotype. The aim of this study was to determine whether mt5178 A/C polymorphism influences intraocular pressure (IOP), and its relationship with the development of arteriosclerosis.


METHODS
Four hundred and forty-nine male volunteers who had visited a general hospital for medical check-up between August 1999 and August 2000 were enrolled. Of these, 386 Japanese men who had not undergone any medical treatment for hypertension, ocular hypertension or glaucoma were selected as subjects of this study. After these subjects were genotyped, a cross-sectional study regarding the relationship between genotype and IOP was conducted.


RESULTS
Mean IOP was significantly higher in men with mt5178 C (13.3 mmHg) than in those with mt5178 A (12.7 mmHg) (P = 0.037). This significant difference in mean IOP between the two genotypes remained evident after adjusting for age, body mass index, blood pressure, habitual smoking and habitual drinking. Interactions between mt5178 A/C polymorphism and habitual smoking or daily alcohol consumption with regard to IOP were observed. According to multiple regression analysis, habitual smoking was significantly associated with IOP in men with mt5178 A (P for trend = 0.020), while daily alcohol consumption was significantly associated with IOP in those with mt5178 C (P for trend = 0.021).


CONCLUSIONS
Longevity-associated mitochondrial DNA 5178 A/C polymorphism may be associated with IOP in Japanese men.
Kokaze
Akatsuki
A
Department of Public Health, Kyorin University School of Medicine, Tokyo, Japan. dawn@kyorin-u.ac.jp
Yoshida
Masao
M
Ishikawa
Mamoru
M
Matsunaga
Naomi
N
Makita
Ryuji
R
Satoh
Masao
M
Sekiguchi
Kanako
K
Masuda
Yumi
Y
Uchida
Yoshiko
Y
Takashima
Yutaka
Y
D001794:Blood Pressure; D015992:Body Mass Index; D003430:Cross-Sectional Studies; D004272:DNA, Mitochondrial / Q000235:genetics*; D005838:Genotype; D006801:Humans; D007429:Intraocular Pressure / Q000235:genetics*; D007564:Japan; D008136:Longevity / Q000235:genetics*; D008297:Male; D008875:Middle Aged; D011110:Polymorphism, Genetic
D004272:DNA, Mitochondrial