β-catenin蛋白發(fā)生O-GlcNAc糖基化促進絨毛膜癌細胞遷移
[Abstract]:Human choriocarcinoma is a malignant trophoblastic tumor, which usually occurs in normal pregnancy or abnormal pregnancy. The lesion is mainly located in the uterus, with high metastasis and invasiveness, and is easily metastasized to the whole body through blood, and the degree of malignancy is extremely high. Therefore, studying the metastasis mechanism of choriocarcinoma and seeking effective targets to inhibit its metastasis will be helpful to the prevention and treatment of the tumor. At present, the ability of tumor metastasis is gradually focused on protein post-translational modification, especially glycosylation modification, which is catalyzed by a variety of glycosyltransferases, and the corresponding sugar chains are added to each functional protein. The effects of different sugar residues on protein function are also different, thus regulating various biological effects. In this study, we investigated the effect of O-linkedN-acetylglucosamine-O-GlcNAc on the migration of choriocarcinoma cells and its mechanism. O-G1cNAc monosaccharide modification is a kind of post-translational modification in cytoplasm and nucleus. It occurs on the side chain hydroxyl groups of serine (Ser) and threonine (Thr) residues. It transfers only one N-acetyl glucosamine to the Ser-Thr residue of the protein under the action of O-position 尾 -N-acetyl-glucosaminotransferase (OGT), and it can remove the sugar chain through the glucosidase OGA. The dynamic equilibrium of O-G1cNAc monosaccharide was maintained under the combined action of two enzymes. The O-glycosylation modification of some functional proteins associated with adhesion may have different effects on their own activities and functions, and then change the biological functions of cells, such as cell migration, adhesion, invasion and so on. In this study, human choriocarcinoma cells (jar) were used as the study model. OGA specific inhibitors were used to treat the cells and to establish a cell model with high glycosylation of O-G1cNAc. Then the cell migration assay (transwell method) was used to observe whether the migration ability of jar cells was affected. It was found that the increase of glycosylation and modification of O-G1cNAc protein promoted the migration of jar cells, and the adhesion between jar cells and umbilical vein endothelial cells (EA.hy926) was also enhanced. These results suggest that the degree of glycosylation of O-G1cNAc protein is related to migration and metastasis of choriocarcinoma. Then, the cell model of partial silencing of OGT gene was established by siRNA interference. Transwell and adhesion experiments were used to confirm that the level of glycosylation of O-G1cNAc protein was positively correlated with the migration and adhesion ability of jar cells. By using immunoprecipitation technique, it was found that the degree of O-GlcNAc glycosylation of 尾 -catenin, an important functional protein in the cells, increased with the increase of glycosylation level of O-G1cNAc in jar cells treated with OGA inhibitor. However, the expression of 尾-catenin in choriocarcinoma cells was not affected. In addition, we treated choriocarcinoma cells with IL-8 for 24 hours and detected the degree of glycosylation of OGT and O-G1cNAc by fluorescence quantitative western blot. The overall level of glycosylation of O-G1cNAc did not change, suggesting that the glycosylation modification of O-GlcNAc protein was not involved in the regulation of IL-8 promoting the metastasis of choriocarcinoma cells. In conclusion, OGT may promote the metastasis and adhesion of choriocarcinoma cells to endothelial cells by increasing the O-GlcNAc glycosylation level of 尾 -catenin, which may also be one of the molecular mechanisms of high metastasis of choriocarcinoma. This study provides a new target for the prevention and treatment of choriocarcinoma.
【學位授予單位】:重慶醫(yī)科大學
【學位級別】:碩士
【學位授予年份】:2014
【分類號】:R737.33
【相似文獻】
相關期刊論文 前10條
1 叢琦;顧玉超;于文功;;蛋白質(zhì)O-GlcNAc修飾的檢測技術[J];中國生物化學與分子生物學報;2012年06期
2 張肖冰;師以康;;蛋白質(zhì)O-GlcNAc糖基化與腫瘤[J];腫瘤;2013年11期
3 樊瓊;顧玉超;于文功;;O-GlcNAc修飾與腫瘤發(fā)生及轉(zhuǎn)移[J];中國生物化學與分子生物學報;2011年08期
4 Mitsutaka Ogawa;Koichi Furukawa;Tetsuya Okajima;;Extracellular O-linked β-N-acetylglucosamine: Its biology and relationship to human disease[J];World Journal of Biological Chemistry;2014年02期
5 張積仁,張學庸;腫瘤患者血清碳水化合物末端Galβ1→4 GlcNAc糖鏈序列的表達[J];第四軍醫(yī)大學學報;1991年01期
6 第五永長;田金洲;;Tau蛋白磷酸化及O-GlcNAc糖基化修飾與阿爾茨海默病[J];中風與神經(jīng)疾病雜志;2010年03期
7 蒯學章;張令強;賀福初;;O-GlcNAc修飾研究進展[J];軍事醫(yī)學科學院院刊;2006年01期
8 屈茹楠;琚娜娜;吳明軍;趙德璋;王應雄;楊竹;于超;;功能蛋白O-GlcNAc糖基化修飾調(diào)控絨毛膜癌細胞的轉(zhuǎn)移[J];中國細胞生物學學報;2013年07期
9 陳玉靜;黃小波;陳文強;王寧群;;遠志皂苷元對PC12細胞tau蛋白磷酸化和O-GlcNAc糖基化的影響[J];天津中醫(yī)藥;2013年01期
10 ;Chemoenzymatic synthesis of α2 3-sialylated carbohydrate epitopes[J];Science China(Chemistry);2011年01期
相關會議論文 前10條
1 ;A novel coupled-enzyme method for O-linked GIcNAc transferase activity assay[A];第六屆全國化學生物學學術會議論文摘要集[C];2009年
2 王文君;尹志東;謝端;曹宸銘;劉太寶;李鐵海;郭麗娜;沈杰;趙煒;王欣;王鵬;;基于生物素修飾探針分子的O-GlcNAc轉(zhuǎn)移酶研究[A];第六屆全國化學生物學學術會議論文摘要集[C];2009年
3 ;Investigation of Efficient Constructing Gal(1-3)[NeuAc(2-6)]GlcNAc(2-6)Man[A];2011年全國藥物化學學術會議——藥物的源頭創(chuàng)新論文摘要集[C];2011年
4 邢立靜;李娟;徐云遠;種康;;春化作用的O-GlcNAc信號調(diào)控機制[A];中國遺傳學會植物遺傳和基因組學專業(yè)委員會2009年學術研討會論文摘要匯編[C];2009年
5 劉華東;李艷梅;;UDP-GIcNAc轉(zhuǎn)移酶(OGT)的結(jié)構(gòu)及作用機理[A];第七屆全國酶學學術討論會論文摘要集[C];2004年
6 Ju餼rez,S.;Hartweck,L.;Alamillo,J.M.;Simón-Mateo,C.;Pérez,J.J.;Fern餼ndez-Fern餼ndez,M.R.;Olszewski,N.E.;García,J.A.;;THE O-GlcNAc TRANSFERASE SECRET AGENT PLAYS A ROLE IN PLANT VIRUS INFECTION[A];中國植物病理學會2005年學術年會暨植物病理學報創(chuàng)刊50周年紀念會論文摘要集[C];2005年
7 Peng George Wang;;Design and synthesis of O-GIcNAcase inhibitor[A];2011年全國藥物化學學術會議——藥物的源頭創(chuàng)新論文摘要集[C];2011年
8 ;De-Novo Designed α-helix to Mimicking the OGT Binding with UDP-GlcNAc[A];第七屆全國磷化學化工暨第四屆海峽化學生物學、生物技術與醫(yī)藥發(fā)展討論會論文集[C];2006年
9 李艷梅;陳永湘;;利用ESI-MS和MALDI-TOF鑒定多肽O-GlcNAc修飾位點[A];中國蛋白質(zhì)組學第三屆學術大會論文摘要[C];2005年
10 邢立靜;李娟;種康;;參與胞內(nèi)運動的小麥凝集素VER2介導春化誘導的O-GlcNAc信號[A];中國植物學會七十五周年年會論文摘要匯編(1933-2008)[C];2008年
相關重要報紙文章 前1條
1 余志平;腫瘤聚糖新藥研發(fā)瞄準聚糖形成[N];中國醫(yī)藥報;2005年
相關博士學位論文 前6條
1 宓文義;O-GlcNAc糖基化修飾在腫瘤發(fā)生與轉(zhuǎn)移過程中的作用及其機制研究[D];中國海洋大學;2011年
2 施建華;O-GlcNAc糖基化在神經(jīng)疾病中的作用[D];蘇州大學;2012年
3 顧玉超;O-GlcNAc修飾在乳腺癌轉(zhuǎn)移過程中的作用及其機制研究[D];中國海洋大學;2008年
4 房俊強;大腸桿菌K12 GlcNAc-1-P尿苷轉(zhuǎn)移酶的研究[D];山東大學;2009年
5 第五永長;銀思維對擬SAD大鼠腦內(nèi)tau磷酸化及其O-GlcNAc修飾的調(diào)節(jié)作用及相關研究[D];北京中醫(yī)藥大學;2011年
6 關婉怡;N-乙酰氨基葡萄糖/半乳糖核苷酸及類似物的酶法合成與應用研究[D];山東大學;2011年
相關碩士學位論文 前10條
1 叢琦;蛋白質(zhì)O-GlcNAc修飾研究的方法探討[D];中國海洋大學;2012年
2 周潔雯;高效合成UDP-N-GlcNAc多酶體系的構(gòu)建[D];浙江大學;2010年
3 鄧瑞萍;基于人蛋白質(zhì)組芯片的新O-GlcNAc糖基轉(zhuǎn)移酶相互作用蛋白及底物發(fā)現(xiàn)研究[D];上海交通大學;2013年
4 樊瓊;O-GlcNAc修飾在結(jié)腸癌形成和遷移過程中的作用[D];中國海洋大學;2011年
5 顏金科;GlcNAc-BC共聚物的生物合成及其機理探究[D];海南大學;2012年
6 祝茜茜;氧連氮—乙酰葡糖胺(O-GlcNAc)修飾在肝癌肝移植后腫瘤復發(fā)轉(zhuǎn)移中的作用及其機制研究[D];浙江大學;2012年
7 崔銀星;O-GlcNAc轉(zhuǎn)移酶在肝細胞癌中的表達及臨床意義[D];吉林大學;2014年
8 劉海艷;PI3K/Akt信號在O-GlcNAc介導的小鼠乳腺癌轉(zhuǎn)移過程中的作用[D];中國海洋大學;2009年
9 屈茹楠;β-catenin蛋白發(fā)生O-GlcNAc糖基化促進絨毛膜癌細胞遷移[D];重慶醫(yī)科大學;2014年
10 葛宇清;O-GlcNAc糖基轉(zhuǎn)移酶對小鼠乳腺癌細胞遷移的影響[D];中國海洋大學;2007年
本文編號:2133157
本文鏈接:http://sikaile.net/yixuelunwen/fuchankeerkelunwen/2133157.html