Hibiscus sabdariffa Extract Inhibits the
Development of Atherosclerosis in Cholesterol-Fed Rabbits
Chang-Che Chen, Jeng-Dong Hsu, San-Fa Wang,
Huei-Ching Chiang, Mon-Yuan Yang, Erl-Shyh Kao, Yung-Chyan
Ho, and Chau-Jong Wang
Institute of Biochemistry, College of Medicine,
Chung Shan Medical University, Taichung, Taiwan, Department
of Pathology, Chung Shan Medical University Hospital,
Taichung, Taiwan, and Department of Applied Chemistry,
Chung Shan Medical University, Taichung, Taiwan
Hibiscus sabdariffa L., a local soft drink
material and medicinal herb, is usually used effectively
in native medicines against hypertension, pyrexia, and
liver disorders. Here, we report an extract, HSE (H.
sabdariffa extract), which is designed to exhibit
hypolipidemia and antiatherosclerotic effects in rabbits
with experimental atherosclerosis. New Zealand White
rabbits were fed with a normal diet, high cholesterol
(1.3%), lard oil (3%) diet (HCD) with or without 0.5
or 1% HSE for 10 weeks. The levels of triglyceride,
cholesterol, and low-density lipoprotein cholesterol
(LDL-C) were lower in the serum of rabbits fed HCD plus
HSE than in the serum of rabbits fed HCD. Feeding HSE
(0.5 and 1% in the diet) to rabbits significantly reduced
severe atherosclerosis in the aorta. Histopathological
examination showed that HSE reduced foam cell formation
and inhibited smooth muscle cell migration and calcification
in the blood vessel of rabbits. These results suggest
that HSE inhibits serum lipids and shows an antiatherosclerotic
activity.
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