期刊
JOURNAL OF FOOD SCIENCE
卷 72, 期 7, 页码 S528-S533出版社
WILEY-BLACKWELL
DOI: 10.1111/j.1750-3841.2007.00474.x
关键词
gallstone formation; hypocholesterolemic activity; tartary buckwheat protein product
Tartary buckwheat protein product (TBP) was prepared from buckwheat flour by alkali extraction and isoelectric precipitation. The protein content of TBP was 45.8% and its amino acid composition of TBP was similar to that of common buckwheat protein product (BWP), SDS-PAGE analysis showed that the protein profile of TBP was partially different from that of BWP. TBP contained more quercetin (1710 mg/100 mg) than BWP (5.4 mg/100 g), while there was a small difference in the contents of rutin between them. In experiment 1, the consumption of BWP and TBP at 20% net protein level of 13 d caused 32% and 25% reductions in serum cholesterol of rats fed cholesterol, respectively, when compared to the consumption of casein (P < 0.05). The reduction of serum cholesterol by BWP and TBP was associated with enhanced excretion of fecal neutral sterols. In experiment 2, the consumption of BWP and TBP for 27 d caused 62% and 43% reductions in the lithogenic index in mice fed cholesterol, respectively (P < 0.05). The reduction in lithogenic index was associated with enhanced excretion of fecal bile acids. Taken together, these results suggest a potential source of TBP as a functional food ingredient as well as BWP.
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