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1鞣花酸代谢产物——尿石素的研究进展显示文摘鞣花单宁和鞣花酸是广泛分布于多种蔬菜、水果和坚果中的多酚类抗氧化剂,其在胃肠道的吸收较差,生物利用率较低,但部分会被哺乳动物肠道微生物转化为更易吸收的尿石素类代谢产物。因此,人们推测这些代谢产物可能为鞣花单宁及鞣花酸发挥生物学活性的最终物质基础。本文对近年来国内外有关尿石素化学性质和抗氧化、抗炎、抗癌以及调节肠道菌群等生物活性的研究进行综述,以期为富含鞣花单宁及鞣花酸类食品的科学利用提供借鉴。尹培培 闫林林 曹若愚 陈晓媛 马超 刘玉军 2015食品科学2015,36,7:17
2Antihydatic and immunomodulatory effects of Punica granatum peel aqueous extract in a murine model of echinococcosis显示文摘Objective:To investigate the effect of pomegranate peel aqueous extract(PGE) on the development of secondary experimental echinococcosis and on the viability of Echinococcux granulosus protoscoleces,and the immunomodulatory properties of PGE.Methods:Swiss mice were inoculated intraperitoneally with viable protoscoleces.Then,PGE was orally administered daily during cystic echinococcosis development.Cyst development and hepatic damage were macroscopically and histologically analyzed.The production of nitric oxide and TNF-α was assessed in plasma and the hepatic expression of iNOS.TNF-α,NF-κB and CD68 was examined.Moreover,protoscoleces were cultured and treated with different concentrations of PGE.Results:It was observed that in vitro treatment of protoscoleces caused a significant decrease in viability in a PGE-dose-dependent manner.In vivo,after treatment of cystic echinococcosis infected mice with PGE,a significant decrease in nitric oxide levels(P<0.000 1)and TNF-α levels(P<0.001) was observed.This decline was strongly related to the inhibition of cyst development(rate of hydatid cyst growth inhibition=63.08%) and a decrease in CD68 expression in both the pericystic layer of hepatic hydatid cysts and liver tissue(P<0.000 1).A significant diminution of iNOS,TNF-α and NF-κB expression was also observed in liver tissue of treated mice(P<0.000 1).Conclusions:Our results indicate an antihydatic scolicidal effect and immunomodulatory properties of PGE,suggesting its potential therapeutic role against Echinococcuss granulosus infection.Moussa Labsi Lila Khelifi Dalila Mezioug Imene Soufli Chafia Touil-Boukoffa 2016Asian Pacific Journal of Tropical Medicine2016,9,3:5
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