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Originally published In Press as doi:10.1194/jlr.M300483-JLR200 on February 16, 2004

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Journal of Lipid Research, Vol. 45, 914-922, May 2004
Copyright © 2004 by American Society for Biochemistry and Molecular Biology

Triglyceride levels are ethnic-specifically associated with an index of stearoyl-CoA desaturase activity and n-3 PUFA levels in Asians

Kuninori Shiwaku1,*, Michio Hashimoto{dagger}, Keiko Kitajima*, Akiko Nogi*, Erdembileg Anuurad*, Byambaa Enkhmaa*, Jung-Man Kim§, In-Shik Kim§, Sung-Kook Lee**, Tsendsuren Oyunsuren{dagger}{dagger}, Osamu Shido{dagger} and Yosuke Yamane*

* Department of Environmental and Preventive Medicine, Shimane University School of Medicine, Izumo, Japan
{dagger} Department of Environmental Physiology, Shimane University School of Medicine, Izumo, Japan
§ Industrial Medicine Research Institute, Dong-A University, Busan, Korea
** Department of Preventive Medicine, School of Medicine, Kyungpook National University, Taegu, Korea
{dagger}{dagger} Center for Biotechnology, Mongolian Academy of Sciences, Ulaanbaatar, Mongolia

1 To whom correspondence should be addressed. e-mail: shiwaku{at}med.shimane-u.ac.jp

Accumulated evidence suggests that hypertriglyceridemia (HTG) is independently associated with an increased incidence of cardiovascular disease. The hypotriglyceridemic effects of n-3 PUFAs have been confirmed in Caucasians, but the effect in Asians is less clear. Recent evidence indicates that stearoyl-CoA desaturase (SCD) activity induced with high-carbohydrate diets increases plasma triglyceride levels. We investigated the relationship between triglyceride levels and the ratio of plasma oleic acid to stearic acid (the 18:1/18:0 ratio), a plasma marker of SCD activity, and n-3 PUFAs in 411 Japanese, 418 Korean, and 251 Mongolian adults. The Japanese and Koreans had higher values for triglyceride than their Mongolian counterparts, despite lower body mass index values for the Japanese and Koreans. The Japanese and Koreans ate fish more frequently and had remarkably higher values for n-3 PUFAs than did the Mongolians. Multiple regression analysis showed that triglyceride levels had a great magnitude of correlation with the increases in 18:1/18:0 ratio for the Japanese and Mongolians, and n-3 PUFAs remained significant for the Mongolians.

HTG is ethnicity-specifically associated with an increase in the 18:1/18:0 ratio and a decrease in n-3 PUFA in plasma for Japanese, Koreans, and Mongolians.

Abbreviations: ASP, acylation-stimulating protein; BMI, body mass index; DHA, docosahexaenoic acid; EPA, eicosapentaenoic acid; HDL-C, HDL-cholesterol; HOMA-IR, homeostasis model assessment-insulin resistance; HTG, hypertriglyceridemia; LDL-C, LDL-cholesterol; LNA, {alpha}-linolenic acid; SCD, stearoyl-CoA desaturase; SREBP, sterol-regulatory element binding protein

Supplementary key words fish • stearoyl coenzyme A • n-3 polyunsaturated fatty acid


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