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01 June 2012

Differences in endothelial function between Korean-Asians and Caucasians

Jongeun YimABCDEF, Jerrold PetrofskyABCDEF, Lee BerkABCDEF, Noha DaherABCDE, Everett LohmanADE

DOI: 10.12659/MSM.882902

Med Sci Monit 2012; 18(6): CR337-343

Abstract

Background: The vascular endothelium plays an integral role in maintaining vascular homeostasis, including the regulation of blood flow, vascular tone, and platelet aggregation. The aim of this study was to see if there were any differences in endothelial function between Koreans and Caucasians.
Material/Methods: This was accomplished by 2 measures of endothelial function – the response to local heat and the response to vascular occlusion. Ten Caucasian and 10 Korean male and female subjects participated (<35 years old). Endothelial function was assessed by the skin blood flow response to local heat using a thermode for 6 minutes at 3 temperatures (38°C, 40°C and 42°C) and by vascular occlusion for 4 minutes followed by release and measurement of skin blood flow for 2 minutes.
Results: When applying 6 minutes of local heat at 3 different temperatures (38°C, 40°C, and 42°C), the skin blood flows were significantly higher for all temperatures in Caucasians as compared with Koreans, with peak blood flow of 223±48.1, 413.7±132.1, and 517.4±135.8 flux in Caucasians and 126.4±41.3, 251±77.9, and 398±97.2 flux in Koreans, respectively (p=0.001). Results of this study support the idea that the skin blood flow response to occlusion was significantly higher in Caucasians (peak 411.9±88.9 flux) than Koreans (peak 332.4±75.8 flux) (p=0.016).
Conclusions: These findings suggest that Koreans may have lower endothelial function than Caucasians, which may be explained, in part, by genetic variations between the 2 ethnic groups.

Keywords: Hot Temperature, European Continental Ancestry Group, Endothelium, Vascular - physiopathology, Coronary Occlusion - physiopathology, Asian Continental Ancestry Group, Regional Blood Flow, Skin Temperature - physiology

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Medical Science Monitor eISSN: 1643-3750
Medical Science Monitor eISSN: 1643-3750