title: Tea Dietary Fiber Improves Serum and Hepatic Lipid Profiles in Mice Fed a High Cholesterol Diet.
abstract: Tea dietary fiber (TDF) was prepared from tea residues and modified to get cellulose-modified TDF (CTDF) by cellulase or micronized TDF (MTDF) by ultrafine grinding. The in vitro lipid-binding capacities of the three fibers and their effects on serum and hepatic lipid profiles in mice fed a high cholesterol diet were evaluated. The results showed that the three fibers had excellent lipid-binding capacities, and the cholesterol- and sodium cholate-binding capacities of CTDF and MTDF were significantly higher than those of TDF. Animal studies showed that, compared to model control, the three fibers significantly decreased mice average daily gain, gain: feed, and liver index, reduced total cholesterol (TC), triglyceride, and low density lipoprotein-cholesterol of serum and liver, increased serum and hepatic high density lipoprotein-cholesterol to TC ratio, and promoted the excretion of fecal lipids, and they also significantly increased the activities of superoxide dismutase and glutathione peroxidase of serum and liver, and decreased lipid peroxidation; moreover, the effects of CTDF and MTDF were better than that of TDF. It was concluded that the three fibers could improve serum and hepatic lipid profiles in mice fed a high cholesterol diet and the mechanism of action might be due to the promotion of fecal excretion of lipids through their lipid-binding ability and the inhibition of lipid peroxidation. These findings suggest that tea dietary fiber has the potential to be used as a functional ingredient to control cardiovascular disease.
authors.affiliation: Ministry of Education, Key Laboratory of Horticultural Plant Biology (Huazhong Agricultural University), Wuhan, 430070, People's Republic of China.
authors.forename: Wenxin
authors.initials: W
authors.lastname: Guo
authors.affiliation: Ministry of Education, Key Laboratory of Horticultural Plant Biology (Huazhong Agricultural University), Wuhan, 430070, People's Republic of China.
authors.forename: Yang
authors.initials: Y
authors.lastname: Shu
authors.affiliation: Ministry of Education, Key Laboratory of Horticultural Plant Biology (Huazhong Agricultural University), Wuhan, 430070, People's Republic of China. yangxp@mail.hzau.edu.cn.
authors.forename: Xiaoping
authors.initials: X
authors.lastname: Yang
mesh_terms: D000818:Animals; D002791:Cholesterol, Dietary / Q000009:adverse effects*; D008076:Cholesterol, HDL / Q000097:blood / Q000378:metabolism; D008078:Cholesterol, LDL / Q000097:blood / Q000378:metabolism; D059305:Diet, High-Fat / Q000009:adverse effects*; D004043:Dietary Fiber / Q000494:pharmacology*; D019587:Dietary Supplements; D004195:Disease Models, Animal; D005243:Feces / Q000737:chemistry; D005260:Female; D005979:Glutathione Peroxidase / Q000097:blood / Q000378:metabolism; D006801:Humans; D006937:Hypercholesterolemia / Q000139:chemically induced / Q000517:prevention & control*; D015227:Lipid Peroxidation / Q000187:drug effects; D008099:Liver / Q000187:drug effects / Q000378:metabolism; D008297:Male; D051379:Mice; D013482:Superoxide Dismutase / Q000097:blood / Q000378:metabolism; D013662:Tea / Q000737:chemistry*; D014280:Triglycerides / Q000097:blood / Q000378:metabolism
chemical_list: D002791:Cholesterol, Dietary; D008076:Cholesterol, HDL; D008078:Cholesterol, LDL; D004043:Dietary Fiber; D013662:Tea; D014280:Triglycerides; D005979:Glutathione Peroxidase; D013482:Superoxide Dismutase
keywords: Antioxidant; Dietary fiber; Lipid profile; Mice; Tea