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901.
Yoshinori Takahashi Tatsuya Konishi Hiroyuki Enari Heon-sik Lee Won Kyung Lee Young Sun Lee Hyoung Kook Park Shigeru Yamamoto 《Fisheries Science》2011,77(6):1045-1052
Protamine is a basic protein whose sulfate is used in medical applications as a carrier for injectable insulin and as a heparin
antagonist, while its hydrochloride is used as an antibacterial ingredient for some food products. We previously showed that
protamine hydrochloride derived from chum salmon milt inhibited pancreatic lipase and reduced plasma triacylglycerol levels
in an oral fat tolerance test in humans. The present study evaluated the effect of chum protamine hydrochloride on lipid metabolism
in rats. The single oral administration of protamine hydrochloride (500 mg/kg) reduced plasma triacylglycerol levels in a
corn oil tolerance test, and repeated oral administration at a dose of 0, 150, 500, or 1,500 mg/kg with a high fat diet for
7 weeks significantly reduced body weight gain, liver weight, and epididymal adipose tissue, whereas total calorie intakes
were not significantly different. These findings could be caused by the suppression of lipid digestibility leading to a significant
increase in fecal lipid excretion due to the fact that protamine hydrochloride could bind with bile acids to make a complex
that is difficult to digest. Protamine hydrochloride, with a considerable history as food, can be considered to be promising
as an anti-obesity functional food material. 相似文献
902.
Evidence has been accumulating to suggest that disulfide bonding is one of the key causes of allergenicity. Recently we developed the “disulfide proteome”, a technique for the comprehensive analysis of disulfide bonding of proteins. We applied this new technique to the rice seed's salt‐soluble fraction, which has long been known to be allergenic. Most proteins in the fraction, including α‐amylase/trypsin inhibsitor, α‐ globulin, and glutelin fragments, have formed intramolecular disulfide bonds. Also, unknown proteins, including one sharing similarities with known allergens, had disulfide bonds, from which we can infer possible allergenicity. This is a preliminary study to screen allergens from the basis of disulfide bonding. 相似文献