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作 者:严淑红[1] 邢文丽[1] 方洛云[1] 王俊杰[1] 刘续航 蒋林树[1]
机构地区:[1]奶牛营养学北京市重点实验室北京农学院动物科学技术学院,北京102206
出 处:《动物营养学报》2015年第4期1270-1277,共8页CHINESE JOURNAL OF ANIMAL NUTRITION
基 金:2012年度北京市人力社保局"新世纪百千万人才工程资助项目";2011-2014年北京市自然科学基金委员会"北京市自然科学基金"(6122006);2014年度北京市教育委员会"北京市属高等学校高层次人才引进与培养计划项目"(CIT&TCD20130324);北京市农业局"北京市现代农业产业技术体系奶牛创新团队"
摘 要:本试验旨在研究茶皂素对乳腺上皮细胞增殖、乳脂合成关键酶的影响。采用酶消化法分离获取乳腺上皮细胞,经免疫荧光鉴定后,分别添加不同浓度[0(对照)、0.05、0.25、0.50、1.00、5.00、10.00、20.00、40.00、60.00、80.00、100.00μg/mL]的茶皂素溶液培养,然后进行如下操作:1)采用噻唑蓝( MTT)法检测不同浓度的茶皂素对乳腺上皮细胞增殖的影响;2)采用酶联免疫分析( ELISA)试剂盒测定细胞中乙酰辅酶A羧化酶( ACACA)、脂肪酸合成酶( FASN)、硬脂酰辅酶A去饱和酶( SCD)的含量;3)采用实时荧光定量PCR的方法测定FASN、ACACA、SCD基因mRNA相对表达水平。结果显示:1)茶皂素浓度为0.05~20.00μg/mL对细胞增殖无显著影响(P>0.05),浓度为20.00~100.00μg/mL时显著抑制细胞增殖(P<0.05);2)细胞FASN、ACACA、SCD的含量在对照组和0.50、5.00、20.00μg/mL浓度组间无显著差异( P>0.05);3)细胞与茶皂素共育24、48 h后,与对照组相比,0.50、5.00、20.00μg/mL 浓度组SCD基因mRNA相对表达水平显著降低( P<0.05)。综合以上,茶皂素对奶牛乳腺上皮细胞增殖及乳脂合成关键酶SCD基因mRNA表达具有一定抑制作用。This experiment was conducted to study the effects of tea saponin on proliferation and milk fat syn-thesis key enzymes of bovine mammary epithelial cells. Mammary epithelial cells were obtained by the method of enzyme digestion. After immunofluorescence identification was done, mammary epithelial cells were cul-tured in tea saponin solution of different concentrations [0 (control), 0.05, 0.25, 0.50, 1.00, 5.00, 10.00, 20.00, 40.00, 60.00, 80.00 and 100.00 μg/mL]. 1) Thiazolyl blue tetrazolium bromide (MTT) method was used to detect the effects of tea saponin on the proliferation of cells. 2) Enzyme-linked immunosorbent as-say ( ELISA) kit was used to measure acetyl-CoA carboxylase ( ACACA) , fatty acid synthase ( FASN) and stearoyl-coenzyme A desaturase ( SCD ) contents in cells. 3 ) Fluorescence-based quantitative real-time PCR method was used to measure the relative expression level of mRNA of ACACA, FASN and SCD. The results showed as follows:1) compared with control group, there was no significant effect of tea saponin at concen-tration of 0.05 to 5.00 μg/mL ( P〉0.05) , but the cell proliferation was significantly inhibited by tea saponin at concentration of 10.00 to 100.00 μg/mL ( P〈0.05); 2) the contents of FASN, ACACA and SCD in cells didn’ t significantly change among control group and 0.50, 5.00 and 20.00 μg/mL concentration groups ( P〉0.05); 3) compared with control group, the relative expression level of SCD mRNA in 0. 50, 5. 00 and 20.00 μg/mL concentration groups was significantly decreased ( P〈0.05) . In conclusion, tea saponin plays a role in inhibition of proliferation and the relative expression level of fat synthesis key enzyme gene SCD mRNA of bovine mammary epithelial cells.
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