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Effect of Weight Reduction With Dietary Intervention on Arterial Distensibility and Endothelial Function in Obese Men

Institute of Health and Sport Sciences, University of Tsukuba, Tsukuba, Ibaraki, Japan

Seiji Maeda, PhD

Center for Tsukuba Advanced Research Alliance, University of Tsukuba, Tsukuba, Ibaraki, Japan, smaeda{at}tara.tsukuba.ac.jp

Mutsuko Yoshizawa, MS

Institute of Health and Sport Sciences, University of Tsukuba, Tsukuba, Ibaraki, Japan

Maiko Misono, BS

Institute of Health and Sport Sciences, University of Tsukuba, Tsukuba, Ibaraki, Japan

Yoko Saito, PhD

Institute of Health and Sport Sciences, University of Tsukuba, Tsukuba, Ibaraki, Japan

Hiroyuki Sasai, MS

Institute of Health and Sport Sciences,University of Tsukuba, Tsukuba, Ibaraki, Japan

Takayuki Endo, MS

Institute of Health and Sport Sciences, University of Tsukuba, Tsukuba, Ibaraki, Japan

Yoshio Nakata, PhD

Institute of Clinical Medicine, University of Tsukuba, Tsukuba, Ibaraki, Japan

Kiyoji Tanaka, PhD

Institute of Health and Sport Sciences, University of Tsukuba, Tsukuba, Ibaraki, Japan

Ryuichi Ajisaka, MD, PhD

Institute of Health and Sport Sciences, University of Tsukuba, Tsukuba, Ibaraki, Japan

Obesity and reduction in central arterial distensibility, respectively, have been identified as powerful and independent risk factors for cardiovascular disease. However, the effect of weight reduction on central arterial function in obese subjects has not yet been clarified. We investigated whether low-calorie diet-induced weight reduction affects central arterial distensibility and endothelial function in middle-aged obese men. Twelve obese men (age: 45+2 yrs, BMI: 30+1 kg/m ²) completed a 12-week dietary intervention. Caloric restriction induced significantly weight loss and decrease in BMI. After the program, carotid arterial compliance significantly increased and b-stiffness index and aortic pulse-wave velocity remarkably decreased. Concentrations of plasma endothelin-1 (ET-1) significantly decreased and plasma nitric oxide (NO) markedly increased after the program. Weight reduction by low-calorie diet in obese men increases central arterial distensibility, which may contribute to the improvement in endothelial function, as noted by a decrease in ET-1 and an increase in NO.

Key Words: diet • arterial compliance • endothelial function

This version was published on June 1, 2009

Angiology, Vol. 60, No. 3, 351-357 (2009)
DOI: 10.1177/0003319708325449


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