研究超高压对风味蛋白酶处理大豆分离蛋白(soybean protein isolate,SPI)中致敏原P34免疫活性的影响。并对脱敏后的SPI功能特性进行了研究。结果表明:超高压处理对风味蛋白酶消除SPI中致敏原P34具有促进作用,将消除P34致敏性的酶解时间...研究超高压对风味蛋白酶处理大豆分离蛋白(soybean protein isolate,SPI)中致敏原P34免疫活性的影响。并对脱敏后的SPI功能特性进行了研究。结果表明:超高压处理对风味蛋白酶消除SPI中致敏原P34具有促进作用,将消除P34致敏性的酶解时间由120 min缩短到了60 min。超高压联合风味蛋白酶酶解脱敏的SPI溶解性、黏度、保水性、吸油性、乳化性和乳化稳定性、起泡性和泡沫稳定性都比单纯酶酶解的SPI明显提高。展开更多
Objective： To learn the effect of allitridi on inducing mitotic arrest in human gastric cell line SGC-7901 and its possible mechanisms. Methods： We treated SGC-7901 cells with allitridi, and observed the proliferati...Objective： To learn the effect of allitridi on inducing mitotic arrest in human gastric cell line SGC-7901 and its possible mechanisms. Methods： We treated SGC-7901 cells with allitridi, and observed the proliferation inhibitory rate with MTT colometric assay, changes of cell cycle using flow cytometry and Switzerland-Giemsa＇s staining, and morphologic changes of the microtubule structure and location changes of cyclin BI expression using immunofluorescence and confocal laser scanning microscope. Furthermore, the expression of cyclin B1 was analyzed quantitatively using Leica confocal software. Results： SGC-7901 cells were inhibited after exposure to allitridi and the IC50 was 7.2μg/ml for 24 h, 20μg/ml for 72 h. When the cells were treated with allitridi at concentrations of 3, 6, and 9μg/ml for 24 h respectively, there was a declining tendency in the percentage of G0/G1 cell but an increasing tendency in GE/M cell in the allitridi treated group compared with that of control （P〈0.01）. When cells were treated allitridi at concentration of 6 μg/ml for 24 h, its mitotic index was much higher （P〈0.01） than that of control, suggesting that allitridi caused arrest of gastric cancer cells in M phase. The cells were treated with allitridi became more shrunken and nepheloid, in which the microtubule networks disappeared, while the control cell exhibited an intact microtubule network. Contrasting with normal existence mainly in the cytoplasm, the cyclin B1 was expressed more significantly and concentrated in the nucleus after exposure to allitridi. Fluorescence intensity of cyclin B 1 protein in cells treated with allitridi was much more higher than that of control （P〈0.001）. Conclusion： Allitridican induce arrest of SGC-7901 cells in M phase, probably through enhancing microtubule depolymerization by elevating the expression of cyclin B1.展开更多
文摘研究超高压对风味蛋白酶处理大豆分离蛋白(soybean protein isolate,SPI)中致敏原P34免疫活性的影响。并对脱敏后的SPI功能特性进行了研究。结果表明:超高压处理对风味蛋白酶消除SPI中致敏原P34具有促进作用,将消除P34致敏性的酶解时间由120 min缩短到了60 min。超高压联合风味蛋白酶酶解脱敏的SPI溶解性、黏度、保水性、吸油性、乳化性和乳化稳定性、起泡性和泡沫稳定性都比单纯酶酶解的SPI明显提高。
基金the National 10th Five-year Plan Key Technologies R & D Program of China(No.2004BA703B04-02)
文摘Objective： To learn the effect of allitridi on inducing mitotic arrest in human gastric cell line SGC-7901 and its possible mechanisms. Methods： We treated SGC-7901 cells with allitridi, and observed the proliferation inhibitory rate with MTT colometric assay, changes of cell cycle using flow cytometry and Switzerland-Giemsa＇s staining, and morphologic changes of the microtubule structure and location changes of cyclin BI expression using immunofluorescence and confocal laser scanning microscope. Furthermore, the expression of cyclin B1 was analyzed quantitatively using Leica confocal software. Results： SGC-7901 cells were inhibited after exposure to allitridi and the IC50 was 7.2μg/ml for 24 h, 20μg/ml for 72 h. When the cells were treated with allitridi at concentrations of 3, 6, and 9μg/ml for 24 h respectively, there was a declining tendency in the percentage of G0/G1 cell but an increasing tendency in GE/M cell in the allitridi treated group compared with that of control （P〈0.01）. When cells were treated allitridi at concentration of 6 μg/ml for 24 h, its mitotic index was much higher （P〈0.01） than that of control, suggesting that allitridi caused arrest of gastric cancer cells in M phase. The cells were treated with allitridi became more shrunken and nepheloid, in which the microtubule networks disappeared, while the control cell exhibited an intact microtubule network. Contrasting with normal existence mainly in the cytoplasm, the cyclin B1 was expressed more significantly and concentrated in the nucleus after exposure to allitridi. Fluorescence intensity of cyclin B 1 protein in cells treated with allitridi was much more higher than that of control （P〈0.001）. Conclusion： Allitridican induce arrest of SGC-7901 cells in M phase, probably through enhancing microtubule depolymerization by elevating the expression of cyclin B1.
