Nutr Res Pract.  2015 Aug;9(4):379-384. 10.4162/nrp.2015.9.4.379.

The interaction of Apolipoprotein A5 gene promoter region T-1131C polymorphism (rs12286037) and lifestyle modification on plasma triglyceride levels in Japanese

• Yamasaki M
• Mutombo PB
• Iwamoto M
• Nogi A
• Hashimoto
• Nabika T
• Shiwaku K

• KMID: 2313854
• DOI: http://doi.org/10.4162/nrp.2015.9.4.379

Abstract

BACKGROUND
/OBJECTIVE: Apolipoprotein A5 gene promoter region T-1131C polymorphism (APOA5 T-1131C) is known to be associated with elevated plasma TG levels, although little is known of the influence of the interaction between APOA5 T-1131C and lifestyle modification on TG levels. To investigate this matter, we studied APOA5 T-1131C and plasma TG levels of subjects participating in a three-month lifestyle modification program.
SUBJECTS/METHODS
A three-month lifestyle modification program was conducted with 297 participants (Age: 57 +/- 8 years) in Izumo City, Japan, from 2001-2007. Changes in energy balance (the difference between energy intake and energy expenditure) and BMI were used to evaluate the participants' responses to the lifestyle modification.
RESULTS
Even after adjusting for confounding factors, plasma TG levels were significantly different at baseline among three genotype subgroups: TT, 126 +/- 68 mg/dl; TC, 134 +/- 74 mg/dl; and CC, 172 +/- 101 mg/dl. Lifestyle modification resulted in significant reductions in plasma TG levels in the TT, TC, and CC genotype subgroups: -21.9 +/- 61.0 mg/dl, -20.9 +/- 51.0 mg/dl, and -42.6 +/- 78.5 mg/dl, respectively, with no significant differences between them. In a stepwise regression analysis, age, APOA5 T-1131C, body mass index (BMI), homeostasis model assessment-insulin resistance (HOMA-IR), and the 18:1/18:0 ratio showed independent association with plasma TG levels at baseline. In a general linear model analysis, APOA5 T-1131C C-allele carriers showed significantly greater TG reduction with decreased energy balance than wild type carriers after adjustment for age, gender, and baseline plasma TG levels.
CONCLUSIONS
The genetic effects of APOA5 T-1131C independently affected plasma TG levels. However, lifestyle modification was effective in significantly reducing plasma TG levels despite the APOA5 T-1131C genotype background.

Keyword

Plasma TG; lifestyle modification; APOA5 T-1131C; energy balance

MeSH Terms

Apolipoproteins*
Asian Continental Ancestry Group*
Body Mass Index
Energy Intake
Genotype
Homeostasis
Humans
Japan
Life Style*
Linear Models
Plasma*
Promoter Regions, Genetic*
Regression Analysis
Triglycerides*
Apolipoproteins

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