Vasodilating dipeptide Trp-His can prevent atherosclerosis in apo E-deficient mice.
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| Abstract |
Most of the investigations for an alternative medicinal treatment on atherosclerosis have been focused on natural or dietary compounds including phytochemicals. So far, few studies regarding anti-atherosclerotic small peptides except for tetrapeptide of Lys-Arg-Glu-Ser have been reported. The present study was, thus, to investigate whether dipeptide Trp-His, which is one of vasodilating small peptides, could reduce atherosclerotic lesions in apo E-deficient mice fed a high-fat diet. The animal study involved a 9-week-successive administration of Trp-His at a dose of 0, 10 or 100 mg/kg per d. After 9-week administration, en face analyses provided the first direct evidence that the atherosclerotic lesion area was significantly reduced by 27 and 38 % for Trp-His dosed at 10 and 100 mg/kg per d, respectively, compared with the control group. Administration of Trp-His did not affect growth parameters such as body weight and feeding efficiency (P>0.1). Total serum cholesterol and HDL-cholesterol as well as lipid profiles in the liver did not differ between the tested groups. Taken together, the anti-atherosclerotic effect of dipeptide Trp-His should be addressed into physiological functions of bioactive peptides, in which the dipeptide may elicit the power by alternative mechanism(s), not by the regulation of lipid metabolism.
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| Authors | Toshiro Matsui, Masao Sato, Mitsuru Tanaka, Yasuna Yamada, Shimpei Watanabe, Yumiko Fujimoto, Katsumi Imaizumi, Kiyoshi Matsumoto |
| Journal | The British journal of nutrition (Br J Nutr) Vol. 103 Issue 3 Pg. 309-13 (Feb 2010) ISSN: 1475-2662 [Electronic] England |
| PMID | 19728894 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't) |
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