中国生化药物杂志
中國生化藥物雜誌
중국생화약물잡지
CHINESE JOURNAL OF BIOCHEMICAL PHARMACEUTICS
2015年
5期
1-5
,共5页
张肖冰%李慧%王凤山%师以康
張肖冰%李慧%王鳳山%師以康
장초빙%리혜%왕봉산%사이강
O-GlcNAc糖基化%紫杉醇%N-乙酰氨基葡萄糖苷酶%N-乙酰氨基葡萄糖转移酶
O-GlcNAc糖基化%紫杉醇%N-乙酰氨基葡萄糖苷酶%N-乙酰氨基葡萄糖轉移酶
O-GlcNAc당기화%자삼순%N-을선안기포도당감매%N-을선안기포도당전이매
O-Glycosylation%Taxol%β-N-acetylglucosaminidase%β-N-acetylglucosaminyltransferase
目的:研究紫杉醇对乳腺瘤细胞蛋白质O-GlcNAc糖基化水平的影响及其机制,探讨蛋白质O-GlcNAc糖基化水平变化对紫杉醇抗肿瘤活性的影响。方法使用Western blot检测紫杉醇对乳腺癌细胞蛋白质O-GlcNAc糖基化水平及多种相关酶蛋白表达水平的影响;RT-qPCR检测紫杉醇对N-乙酰氨基葡萄糖苷酶(β-N-acetylglucosaminidase, OGA)和N-乙酰氨基葡萄糖转移酶(β-N-acetylglucosaminyltrans-fevase,OGT) mRNA水平的影响;采用OGA/OGT抑制剂PUGNAc/alloxan改变蛋白质O-GlcNAc糖基化水平,磺基罗丹明B法测定紫杉醇对肿瘤细胞增殖的影响。结果紫杉醇可诱导乳腺癌细胞MDA-MB-231蛋白质O-GlcNAc糖基化水平升高(P<0.05),且具有时间和浓度依赖性;紫杉醇还可同时诱导OGA和OGT mRNA和蛋白水平的升高(P<0.05),且具有浓度依赖性;采用OGA的抑制剂PUGNAc提高蛋白质O-GlcNAc糖基化水平后,细胞对紫杉醇的敏感性升高;采用OGT的抑制剂alloxan降低蛋白质O-GlcNAc糖基化水平后,细胞对紫杉醇的敏感性降低。结论紫杉醇可诱导蛋白质O-GlcNAc糖基化水平升高,蛋白质O-GlcNAc糖基化水平的改变也会影响乳腺癌细胞对紫杉醇的药物敏感性。
目的:研究紫杉醇對乳腺瘤細胞蛋白質O-GlcNAc糖基化水平的影響及其機製,探討蛋白質O-GlcNAc糖基化水平變化對紫杉醇抗腫瘤活性的影響。方法使用Western blot檢測紫杉醇對乳腺癌細胞蛋白質O-GlcNAc糖基化水平及多種相關酶蛋白錶達水平的影響;RT-qPCR檢測紫杉醇對N-乙酰氨基葡萄糖苷酶(β-N-acetylglucosaminidase, OGA)和N-乙酰氨基葡萄糖轉移酶(β-N-acetylglucosaminyltrans-fevase,OGT) mRNA水平的影響;採用OGA/OGT抑製劑PUGNAc/alloxan改變蛋白質O-GlcNAc糖基化水平,磺基囉丹明B法測定紫杉醇對腫瘤細胞增殖的影響。結果紫杉醇可誘導乳腺癌細胞MDA-MB-231蛋白質O-GlcNAc糖基化水平升高(P<0.05),且具有時間和濃度依賴性;紫杉醇還可同時誘導OGA和OGT mRNA和蛋白水平的升高(P<0.05),且具有濃度依賴性;採用OGA的抑製劑PUGNAc提高蛋白質O-GlcNAc糖基化水平後,細胞對紫杉醇的敏感性升高;採用OGT的抑製劑alloxan降低蛋白質O-GlcNAc糖基化水平後,細胞對紫杉醇的敏感性降低。結論紫杉醇可誘導蛋白質O-GlcNAc糖基化水平升高,蛋白質O-GlcNAc糖基化水平的改變也會影響乳腺癌細胞對紫杉醇的藥物敏感性。
목적:연구자삼순대유선류세포단백질O-GlcNAc당기화수평적영향급기궤제,탐토단백질O-GlcNAc당기화수평변화대자삼순항종류활성적영향。방법사용Western blot검측자삼순대유선암세포단백질O-GlcNAc당기화수평급다충상관매단백표체수평적영향;RT-qPCR검측자삼순대N-을선안기포도당감매(β-N-acetylglucosaminidase, OGA)화N-을선안기포도당전이매(β-N-acetylglucosaminyltrans-fevase,OGT) mRNA수평적영향;채용OGA/OGT억제제PUGNAc/alloxan개변단백질O-GlcNAc당기화수평,광기라단명B법측정자삼순대종류세포증식적영향。결과자삼순가유도유선암세포MDA-MB-231단백질O-GlcNAc당기화수평승고(P<0.05),차구유시간화농도의뢰성;자삼순환가동시유도OGA화OGT mRNA화단백수평적승고(P<0.05),차구유농도의뢰성;채용OGA적억제제PUGNAc제고단백질O-GlcNAc당기화수평후,세포대자삼순적민감성승고;채용OGT적억제제alloxan강저단백질O-GlcNAc당기화수평후,세포대자삼순적민감성강저。결론자삼순가유도단백질O-GlcNAc당기화수평승고,단백질O-GlcNAc당기화수평적개변야회영향유선암세포대자삼순적약물민감성。
Objective To study effect of Taxol on protein O-GlcNAcylation levels and investigate whether protein O-GlcNAcylation levels can affect the sensitivity of breast cancer cells to Taxol.Methods Western blot analysis was performed to examine protein O-GlcNAcylation levels and the expression of enzymes related to O-GlcNAcylation biosynthesis in Taxol treated breast cancer cells.RT-qPCR was used to analyze the effects of Taxol on OGA and OGT mRNA expression in cancer cells.The sulforhodamine B colorimetric assay was used to determine the effect of alteration of protein O-GlcNAcylation on the anti-proliferation of Taxol in breast cancer cells by adding OGA inhibitor and OGT inhibitor, respectively.Results Taxol treatment enhanced protein O-GlcNAcylation levels in dose-and time-dependent manners in breast cancer cell MDA-MB-231 ( P <0.05 ) .Taxol increased the mRNA levels of OGT and OGA after MDA-MB-231 cells were treated for 24 h(P<0.05).As OGA inhibitors increased protein O-GlcNAcylation levels, the sensitivity of MDA-MB-231 to Taxol was increased.As OGT inhibitor decreased protein O-GlcNAcylation levels, the sensitivity of MDA-MB-231 to Taxol was reduced.Conclusion Taxol treatment can enhance protein O-GlcNAcylation levels and the changes of O-GlcNAcylation levels alter the sensitivity of breast cancer cell MDA-MB-231 to Taxol.