国产日韩欧美一区二区三区三州_亚洲少妇熟女av_久久久久亚洲av国产精品_波多野结衣网站一区二区_亚洲欧美色片在线91_国产亚洲精品精品国产优播av_日本一区二区三区波多野结衣 _久久国产av不卡

?

重組慢病毒介導(dǎo)的NMD途徑因子UPF1和SMG1可誘導(dǎo)干擾細(xì)胞株的構(gòu)建

2012-01-11 04:29柴寶峰常文娟申泉王剛
關(guān)鍵詞:寡核苷酸泳道細(xì)胞株

柴寶峰,常文娟,申泉,王剛

(化學(xué)生物學(xué)與分子工程教育部重點(diǎn)實(shí)驗(yàn)室,山西大學(xué) 生物技術(shù)研究所,山西 太原 030006)

重組慢病毒介導(dǎo)的NMD途徑因子UPF1和SMG1可誘導(dǎo)干擾細(xì)胞株的構(gòu)建

柴寶峰,常文娟,申泉,王剛

(化學(xué)生物學(xué)與分子工程教育部重點(diǎn)實(shí)驗(yàn)室,山西大學(xué) 生物技術(shù)研究所,山西 太原 030006)

無(wú)義介導(dǎo)的m RNA降解途徑是一個(gè)比較完善的異常mRNA的降解機(jī)制,結(jié)合在外顯子拼接復(fù)合體上的多種蛋白決定NMD途徑對(duì)異常轉(zhuǎn)錄物的識(shí)別和降解的啟動(dòng),其中UPF1和SMG1發(fā)揮主要功能.UPF1是一個(gè)RNA解旋酶和RNA依賴的ATP酶;而SMG1具有磷脂酰肌醇激酶活性,負(fù)責(zé)UPF1的磷酸化.本研究構(gòu)建了含有UPF1和SMG-1基因發(fā)夾結(jié)構(gòu)的誘導(dǎo)開(kāi)關(guān)基因表達(dá)干擾質(zhì)粒.利用慢病毒介導(dǎo)轉(zhuǎn)化哺乳動(dòng)物細(xì)胞HEK293T細(xì)胞得到重組病毒,經(jīng)鑒定后感染細(xì)胞AD_293,目的基因在細(xì)胞中得以高效表達(dá).通過(guò)繼代培養(yǎng)和單克隆化,得到強(qiáng)力霉素誘導(dǎo)干擾UPF1和SMG-1表達(dá)的穩(wěn)定細(xì)胞株.

NMD途徑;UPF 1;SMG 1;PTC;RNA干擾;shRNA

真核生物細(xì)胞擁有多種機(jī)制用于保障基因復(fù)制的忠實(shí)性和表達(dá)的準(zhǔn)確性.從基因語(yǔ)言到蛋白質(zhì)語(yǔ)言的轉(zhuǎn)化過(guò)程中,經(jīng)歷基因的轉(zhuǎn)錄、剪接、修飾、運(yùn)輸和翻譯,每一個(gè)過(guò)程都有一套精密的調(diào)控機(jī)制.其中無(wú)義介導(dǎo)的m RNA降解途徑(nonsense-mediated RNA decay,NMD)是一個(gè)比較完善的m RNA監(jiān)控和降解機(jī)制,可以選擇性地消除含有早發(fā)性終止密碼子(premature termination codons,PTC)的異常m RNA,結(jié)合在外顯子拼接復(fù)合體(exon-exon junction complex,EJC)上的 UPF1(up-frameshift protein)和SMG1(suppressor with morphological effect on genitalia protein)決定NMD途徑對(duì)異常轉(zhuǎn)錄物的識(shí)別和降解途徑的啟動(dòng)[1-3].含有PTC的m RNA表達(dá)出C端截短的蛋白,有些具有顯性-負(fù)性(dominant-negative)功能,影響其等位基因所表達(dá)的正常蛋白的功能;有些則產(chǎn)生功能獲得性(gain-of-function)蛋白,導(dǎo)致機(jī)體病變[4].另外,NMD途徑還參與調(diào)解各種細(xì)胞過(guò)程中正常的mRNA的表達(dá),諸如細(xì)胞分化、脅迫反應(yīng)和染色體結(jié)構(gòu)和功能的維持以及胚胎發(fā)育等[2,5-6].該途徑與人類疾病的發(fā)生密切相關(guān),尤其是由單基因無(wú)義突變導(dǎo)致的各種疾病,如地中海貧血癥、血友病、杜氏肌肉營(yíng)養(yǎng)不良癥(Duchenne’s muscular dystrophy,DMD)和囊性纖維?。╟ystic fibrosis,CF)等[4,7-11].此外,抑癌基因無(wú)義突變是導(dǎo)致腫瘤發(fā)生的一個(gè)重要機(jī)制,含有 PTC的抑癌基因(tumor suppressor gene)的轉(zhuǎn)錄產(chǎn)物也是 NMD 途徑的靶標(biāo)[8,12-13].因此,對(duì) NMD 途徑機(jī)制的深入研究具有重要的科學(xué)意義和應(yīng)用前景.本文構(gòu)建了引發(fā)NMD途徑的關(guān)鍵因子UPF1和SMG-1的開(kāi)關(guān)型干擾質(zhì)粒,用慢病毒介導(dǎo)的方法轉(zhuǎn)化哺乳動(dòng)物細(xì)胞,篩選得到了強(qiáng)力霉素誘導(dǎo)干擾UPF1和SMG-1表達(dá)的細(xì)胞穩(wěn)定株,為深入探討NMD途徑的機(jī)制奠定了基礎(chǔ).

1 材料和方法

1.1 材料

1.1.1 細(xì)胞株

大腸桿菌(Escherichiacoli)DH5α為本實(shí)驗(yàn)室保存;人胚腎細(xì)胞(HEK293T)和AD_293細(xì)胞購(gòu)自Stratagene公司,本實(shí)驗(yàn)室保存.

1.1.2 試劑和工具酶

DNA回收試劑盒 (Gel Extraction Mini Kit)購(gòu)自Bio MIGA公司;質(zhì)粒抽提試劑盒(Plasmid Mini Kit)購(gòu)自O(shè)MEGA公司;EasyTaqDNA聚合酶購(gòu)于北京全式金生物技術(shù)有限公司;D-MEM細(xì)胞培養(yǎng)基和Lipfectinamine2000脂質(zhì)體轉(zhuǎn)染試劑盒購(gòu)自Invitrogen公司;胎牛血清購(gòu)自杭州四季青公司;堿性磷酸酶(Calf intestinal Alkaline Phosphatase)、各種工具酶、T4多核苷酸激酶(polynucleotide kinase)購(gòu)自TaKaRa公司;T4 DNA ligase購(gòu)自Promega公司.PCR引物合成由華大基因公司完成;DNA序列測(cè)定由北京奧科生物公司完成.

1.2 方法

1.2.1 干擾序列的設(shè)計(jì)和合成

為了干擾UPF1和SMG-1基因的表達(dá),設(shè)計(jì)含有發(fā)夾結(jié)構(gòu)的寡核苷酸鏈(sh RNA),在其兩側(cè)分別含有一個(gè)BglII和KpnI的粘性末端.如表1所示,設(shè)計(jì)發(fā)夾結(jié)構(gòu)分別為對(duì)照sh RNAs、與UPF1互補(bǔ)的sh RNA、與SMG-1互補(bǔ)的shRNA.

表1 本研究中所用到的寡核苷酸序列Table 1 Oligonucleotides list used in this study

1.2.2 中間載體的構(gòu)建

將備用的載體p FRT-U6tet O經(jīng)BglII和KpnI雙酶切,用小牛腸道磷酸酶孵育1 h去磷酸化,瓊脂糖凝膠電泳分離、純化.用T4多核苷酸激酶分別將合成的寡核苷酸鏈磷酸化.具體操作體系:10μmol/L寡核苷酸鏈,1 mmol/L三磷酸腺苷,1× 多核苷酸激酶緩沖液,5 U多核苷酸激酶,總體積20μL,37℃孵育1 h.將磷酸化的寡核苷酸鏈分別混勻,75℃退火10 min,冷卻到室溫備用.將上述產(chǎn)物(寡核苷酸鏈)稀釋25倍(終濃度為200 nmol/L)與酶切后的質(zhì)粒進(jìn)行連接反應(yīng).將純化的質(zhì)粒片段1μL、退火產(chǎn)物3μL、2×T4 DNA連接酶緩沖液5μL、T4 DNA連接酶1μL混合,總體積10μL.室溫孵育1 h.將連接產(chǎn)物分別轉(zhuǎn)化感受態(tài)大腸桿菌DH5α.涂板,37℃過(guò)夜孵育,挑取陽(yáng)性克隆,經(jīng)液體培養(yǎng)后提取的重組質(zhì)粒p FRT-shC、p FRT-sh U和p FRT-shS(表2,P378).構(gòu)建的重組質(zhì)粒經(jīng)PCR和測(cè)序鑒定.

1.2.3 干擾載體p TIG-U6tet Osh的構(gòu)建

設(shè)計(jì)引物 BF211/212(表1),分別以構(gòu)建好的質(zhì)粒p FRT-sh C、p FRT-sh U、p FRT-shS為模板進(jìn)行PCR擴(kuò)增.經(jīng)NotI和SphI雙酶切連接到p TIG慢病毒表達(dá)載體上.轉(zhuǎn)化大腸桿菌篩選陽(yáng)性克隆、提取質(zhì)粒后經(jīng)雙酶切和測(cè)序鑒定.得到重組質(zhì)粒p TIG-U6tetO-shC、p TIG-U6tet O-sh U和p TIG-U6tetO-shS(表2).

表2 本實(shí)驗(yàn)構(gòu)建和所用的質(zhì)粒和細(xì)胞株Table 2 Plasmids and cell strains used in this study

1.2.4 重組慢病毒的構(gòu)建

取對(duì)數(shù)生長(zhǎng)期細(xì)胞HEK293T,用質(zhì)量濃度為0.025%的胰酶消化,在底面積為75 cm2的細(xì)胞培養(yǎng)瓶中調(diào)整細(xì)胞濃度為(3.75×106)個(gè),細(xì)胞融合度為50%-70%時(shí),參考脂質(zhì)體轉(zhuǎn)染說(shuō)明書(shū)用陽(yáng)離子脂質(zhì)體Lipfectinamine2000分別將重組質(zhì)粒p TIG-U6tetO-shC、p TIG-U6tetO-sh U 和 p TIG-U6tet O-sh與慢病毒包裝質(zhì)粒pPACKHI-GAG、p PACKHI-REV、p VSV-G共同轉(zhuǎn)染細(xì)胞.轉(zhuǎn)染后8 h換液.分別在24 h,48 h和72 h后開(kāi)始收獲細(xì)胞培養(yǎng)液上清,3 000 r/min離心5 min沉淀細(xì)胞碎片.將上清病毒液用超速離心(50 000×g)在4℃離心90 min濃縮,備用.取80μL病毒懸液,用丙型肝炎病毒核酸檢測(cè)試劑盒(中山大學(xué),達(dá)安基因)反轉(zhuǎn)錄病毒總RNA,得到相應(yīng)的c DNA,用于目的基因的擴(kuò)增檢測(cè).

1.2.5 重組慢病毒感染哺乳動(dòng)物細(xì)胞

取對(duì)數(shù)生長(zhǎng)期AD_293細(xì)胞,用質(zhì)量濃度為0.25%胰酶消化,接種于24孔板,調(diào)整細(xì)胞濃度為每孔0.6×105-1×105個(gè),將超速離心的病毒沉淀用500μL D-MEM重懸,分別滴入24孔板中.7 d后用激光共聚焦顯微鏡觀察綠色熒光強(qiáng)度,判定細(xì)胞的感染效率.篩選穩(wěn)定細(xì)胞株.

2 結(jié)果

2.1 慢病毒載體的構(gòu)建

2.1.1 中間載體的構(gòu)建

如圖1A(P379)所示,在質(zhì)粒p FRT-U6tet O中有一個(gè)強(qiáng)力霉素誘導(dǎo)開(kāi)關(guān)的U6啟動(dòng)子[14].本研究首先將合成的UPF1和SMG-1的發(fā)夾結(jié)構(gòu)寡核苷酸進(jìn)行退火,得到的雙鏈DNA經(jīng)酶切后連接在U6啟動(dòng)子的下游的BglII和KpnI之間.在質(zhì)粒的19-36 bp和302-325 bp位置設(shè)計(jì)引物,對(duì)重組質(zhì)粒進(jìn)行PCR鑒定.當(dāng)目的片段連接成功時(shí),引物擴(kuò)增片段的大小應(yīng)該是~310 bp,而沒(méi)有連接成功時(shí)應(yīng)該是~380 bp.結(jié)果如圖1B所示,泳道1是沒(méi)有連接目的片段的擴(kuò)增產(chǎn)物,泳道2、3、4分別為連接了對(duì)照序列片段、SMG-1發(fā)夾序列片段和UPF1發(fā)夾序列片段.得到的中間重組質(zhì)粒分別命名為p FshC、p FshS和p Fsh U.

2.1.2 慢病毒載體的構(gòu)建

在質(zhì)粒p FRT-U6tetO上的19-36 bp和302-325 bp位置設(shè)計(jì)引物(表1),將含有U6啟動(dòng)子和發(fā)夾結(jié)構(gòu)的基因片段擴(kuò)增出來(lái),連接到p MD-18T載體進(jìn)行測(cè)序.經(jīng)NotI和SphI酶切后連接到p TIG質(zhì)粒中,經(jīng)酶切鑒定(如圖2A,P380)后進(jìn)一步測(cè)序證實(shí).得到一個(gè)含有U6啟動(dòng)子、干擾發(fā)夾序列、Tet R調(diào)控序列和GFP基因的基因表達(dá)盒(圖2B),該表達(dá)盒位于慢病毒表達(dá)質(zhì)粒中.質(zhì)粒分別命名為p TIG-shC、p TIG-sh U、p TIG-shS,分別表達(dá)干擾對(duì)照序列、干擾UPF1和SMG1的基因片段,該干擾過(guò)程受強(qiáng)力霉素的誘導(dǎo)調(diào)控.

圖1 重組慢病毒中間載體的構(gòu)建A p FRT-U6tetO質(zhì)粒載體圖譜;B中間載體p FRT-U6tetO的PCR鑒定.Mr:Takara DL500 DNA Marker,泳道1:質(zhì)粒p FRT空載體的PCR擴(kuò)增產(chǎn)物;泳道2:重組質(zhì)粒p FshC的PCR擴(kuò)增產(chǎn)物;泳道3:重組質(zhì)粒p FshS的PCR擴(kuò)增產(chǎn)物;泳道4:重組質(zhì)粒p Fsh U的PCR擴(kuò)增產(chǎn)物Fig.1 Construction of mediated recombinant lentivirus vectorsA:the map of plasmid p FRT-U6tetO;B:the PCR analysis of mediated plasmids p FRT-U6tetO.Mr:Takara DL500 DNA Marker;Lane 1:PCR product of plasmid p FRT;Lane 2:PCR product of plasmid p FshC;Lane 3:PCR product of plasmid p FshS;Lane 4:PCR product of plasmid p Fsh U

2.2 干擾細(xì)胞株的構(gòu)建

2.2.1 重組慢病毒制備

將構(gòu)建的三種重組慢病毒基因表達(dá)質(zhì)粒p TIG-U6tet O-shC、p TIG-U6tet O-shS和p TIG-U6tet O-sh U分別與病毒包裝質(zhì)?;旌限D(zhuǎn)染人胚腎細(xì)胞HEK293T(圖3A,P380).經(jīng)培養(yǎng)后,離心收集病毒顆粒.取80μL病毒,經(jīng)反轉(zhuǎn)錄得到病毒的cDNA,用引物BF175/176進(jìn)行擴(kuò)增,得到圖2所示的基因盒中U6Tet O與Tet R之間的基因片段,總長(zhǎng)度為2 438 bp(圖3B),并經(jīng)測(cè)序證實(shí).從病毒中克隆到目的基因,說(shuō)明目的基因片段被成功包裝到病毒中,可用于下一步的細(xì)胞的感染,構(gòu)建穩(wěn)定的細(xì)胞株.病毒顆粒分別命名為V-shC、V-shS和V-sh U.

2.2.2 細(xì)胞的感染和篩查

培養(yǎng)AD_293細(xì)胞,調(diào)整細(xì)胞濃度為每孔0.6×105-1×105個(gè)時(shí),用含有基因表達(dá)盒的重組慢病毒V-shC、V-shS和V-sh U分別感染細(xì)胞AD_293.培養(yǎng)7 d后在熒光顯微鏡下觀察.如圖4(P381)所示,表達(dá)基因盒中的eGFP基因作為標(biāo)記,綠色熒光蛋白的表達(dá)說(shuō)明外源基因在細(xì)胞中得到了成功表達(dá),這說(shuō)明人工構(gòu)建的慢病毒成功感染了AD_293細(xì)胞,得到了含有對(duì)UPF1和SMG-1進(jìn)行可誘導(dǎo)干擾的細(xì)胞株.

3 討論

本研究成功構(gòu)建了強(qiáng)力霉素誘導(dǎo)表達(dá)的用于干擾NMD途徑關(guān)鍵因子UPF1和SMG1的重組慢病毒質(zhì)粒,并制備了相應(yīng)的重組病毒,感染目的細(xì)胞AD_293,綠色熒光蛋白基因在細(xì)胞中得以高效表達(dá),說(shuō)明目的基因已經(jīng)通過(guò)慢病毒成功轉(zhuǎn)染到細(xì)胞中.本實(shí)驗(yàn)得到的細(xì)胞株為下一步研究NMD途徑的機(jī)制、無(wú)義突變基因的表達(dá)調(diào)控機(jī)制奠定了基礎(chǔ).另外,該細(xì)胞株可以用于篩選受到NMD途徑調(diào)控的參與細(xì)胞正常生理活動(dòng)的基因和一些與腫瘤發(fā)生相關(guān)的基因[12].

圖2 重組慢病毒干擾載體的構(gòu)建A重組慢病毒干擾質(zhì)粒p TIG-U6tetO-sh的酶切鑒定.重組質(zhì)粒經(jīng)的Not I和Sph I酶切電泳.Mr:Trans 2K Plus DNA Marker,泳道1:重組質(zhì)粒p TIG-U6tetO-shC;泳道2:重組質(zhì)粒p TIG-U6tetO-shS;泳道3:重組質(zhì)粒p TIG-U6tetO-sh U;泳道4:質(zhì)粒p TIG.B強(qiáng)力霉素誘導(dǎo)發(fā)夾序列干擾基因表達(dá)的基因盒組成結(jié)構(gòu)Fig.2 Construction of recombinant lentivirus interference plasmidA:Enzyme analysis of recombinant lentivirus interference plasmid by Not I and Sph I.Mr:Trans 2K Plus DNA Marker;Lane 1:recombinant lentivirus interference plasmid p TIG-U6tetO-shC;Lane 2:recombinant lentivirus interference plasmid p TIG-U6tetO-shS;Lane 3:recombinant lentivirus interference plasmid p TIG-U6tetO-sh U;Lane 4:control plasmid p TIG.B:map of gene cassette encoding dox-inducible interference hairpin structure

圖3 重組慢病毒的制備和鑒定A病毒包裝和穩(wěn)定細(xì)胞株制備流程;B從病毒基因組中擴(kuò)增的目的基因片段.Mr:Trans 2K Plus DNA Marker,泳道1:從病毒cDNA擴(kuò)增的目的基因片段,長(zhǎng)度為2 438 bpFig.3 Preparation and analysis of recombinant lentivirusA:flow-sheet of Preparation and analysis of recombinant lentivirus;B:PCR product from prepared recombinant lentivirus.Mr:Trans 2K Plus DNA Marker;Lane 1:gene fragment amplified from recombinant lentivirus and the full-length is 2 438 bp

圖4 重組慢病毒感染AD_293細(xì)胞,綠色熒光蛋白在細(xì)胞中的表達(dá).圖Control:細(xì)胞內(nèi)發(fā)夾結(jié)構(gòu)中含有的基因序列與基因組片段沒(méi)有互補(bǔ)關(guān)系;圖UPF1:細(xì)胞內(nèi)的基因盒中含有干擾UPF1的發(fā)夾結(jié)構(gòu);圖SMG-1細(xì)胞內(nèi)的基因盒中含有干擾SMG1的發(fā)夾結(jié)構(gòu);Fig.4 Expression of green fluorescence in AD_293 tranfected by recombinant lentivirus Fig.Control:gene in hairpin cassette in AD_293 cells have no complementary to genomic DNA of human cell;Fig.UPF1:gene in hairpin cassette in AD_293 cells interfere the expression of UPF 1;Fig.SMG-1 gene in hairpin cassette in AD_293 cells interfere the expression of SMG1

[1]Frischmeyer P A,Dietz H C.Nonsense-mediated mRNA Decay in Health and Disease[J].HumMolGenet,1999,8(10):1893-1900.

[2]Nicholson P,Yepiskoposyan H,Metze S,etal.Nonsense-mediated mRNA Decay in Human Cells:Mechanistic Insights,F(xiàn)unctions Beyond Quality Control and the Double-life of NMD Factors[J].CellMolLifeSci,2010,67(5):677-700.

[3]Brogna S,Wen J.Nonsense-mediated m RNA Decay(NMD)Mechanisms[J].NatStructMolBiol,2009,16(2):107-113.

[4]Bhuvanagiri M,Schlitter A M,Hentze M W,etal.NMD:RNA Biology Meets Human Genetic Medicine[J].BiochemJ,2010,430(3):365-377.

[5]Hwang J,Maquat L E.Nonsense-mediated mRNA Decay(NMD)in Animal Embryogenesis:to Die or not to Die,That is the Question[J].CurrOpinGenetDev,2011,21:1-9.

[6]Sharifi N A,Dietz H C.Physiologic Substrates and Functions for Mammalian NMD.In:Nonsense-Mediated mRNA Decay[M].Edited by Maquat LE.Georgetown,Texas:Landes Bioscience,2006:97-109.

[7]Abbas S,Erpelinck-Verschueren C A,Goudswaard C S,etal.Mutant Wilms’tumor 1 (WT1)mRNA with Premature Termination Codons in Acute Myeloid Leukemia(AML)is Sensitive to Nonsense-mediated RNA Decay(NMD)[J].Leukemia,2010,24(3):660-663.

[8]Karam R,Carvalho J,Bruno I,etal.The NMD mRNA Surveillance Pathway Downregulates Aberrant E-cadherin Transcripts in Gastric Cancer Cells and in CDH1 Mutation Carriers[J].Oncogene,2008,27(30):4255-4260.

[9]Holbrook J A,Neu-Yilik G,Hentze M W,etal.NMD and Human Disease[M]//Nonsense-Mediated mRNA Decay.Edited by Maquat LE.Georgetown,Texas:Landes Bioscience,2006:111-119.

[10]James P D,Raut S,Rivard G E,etal.Aminoglycoside Suppression of Nonsense Mutations in Severe Hemophilia[J].Blood,2005,106(9):3043-3048.

[11]Hamed S A.Drug Evaluation:PTC-124-a Potential Treatment of Cystic Fibrosis and Duchenne Muscular Dystrophy[J].IDrugs,2006,9(11):783-789.

[12]Gardner L B.Nonsense-mediated RNA Decay Regulation by Cellular Stress:Implications for Tumorigenesis[J].Mol CancerRes,2010,8(3):295-308.

[13]Wolf M,Edgren H,Muggerud A,etal.NMD Microarray Analysis for Rapid Genome-wide Screen of Mutated Genes in Cancer[J].CellOncol,2005,27(3):169-173.

[14]Aagaard L,Aamarzguioui M,Sun G,etal.A Facile Lentiviral Vector System for Expression of Doxycycline-inducible Sh RNAs:Knockdown of the pre-miRNA Processing Enzyme Drosha[J].MolTher,2007,15(5):938-945.

Construction of Cell Strain Containing Inducible Interference of NMD Factor UPF1 and SMG1 Mediated by Lentiviral System

CHAI Bao-feng,CHANG Wen-juan,SHEN Quan,WANG Gang
(KeyLaboratoryofChemicalBiologyandMolecularEngineering,MinistryofEducation,InstituteofBiotechnology,ShanxiUniversity,Taiyuan030006,China)

Nonsense-mediated decay(NMD)is well known by the lucid definition of being a RNA surveillance mechanism that ensures the speedy degradation of mRNAs containing premature translation termination codons.The definition of aberrant transcription and start of NMD are determined by the protein complex binding on EJC,where UPF1 and SMG1 play key role for NMD path.UPF1 is a RNA helicase and a RNA-dependent ATPase.SMG1 is responsible for UPF1 phosphorylation as a phosphatidylinositol 3-kinase.In this study,we construct the p HIV-7-derived lentiviral vector p TIG (p HIV7-Tet R-IRES-GFP)encoding a U6tet O-promoted short hairpin RNA (sh RNA)cassette containing UPF1 and SMG1.The resultant plasmids were transfected into HEK293T cell with the help of packaging plasmids to result in recombinant virus harboring hairpin RNA cassette.The resultant virus were then used to infect AD_293 cell to observe the expression of hairpin RNA gene.We have obtained the cell strains expressing hairpin RNA of UPF1 and SMG1,and these cell strains could be used for next research on the mechanism of NMD and gene screen.

NMD path;UPF 1;SMG 1;premature termination codon;RNA interference;sh RNA

Q813

A

0253-2395(2012)02-0376-07*

2012-02-16

國(guó)家自然科學(xué)基金( 31172078;30770294);山西省自然科學(xué)基金(2009011040-1);山西省留學(xué)歸國(guó)基金項(xiàng)目

柴寶峰(1967-),男,山西聞喜人,博士,教授,研究領(lǐng)域:分子細(xì)胞生物學(xué).E-mail:bfchai@sxu.edu.cn

猜你喜歡
寡核苷酸泳道細(xì)胞株
粗寡核苷酸的純化方法現(xiàn)狀及進(jìn)展
奔奔兔學(xué)游泳
家蠶色氨酸羥化酶 (TRH) 基因的克隆及表達(dá)特性分析
寡核苷酸藥物及寡核苷酸制備技術(shù)研究進(jìn)展
游泳池里的航母
反相離子對(duì)色譜法對(duì)寡核苷酸藥物分析的進(jìn)展
穩(wěn)定敲低MYH10基因細(xì)胞株的建立
Rab27A和Rab27B在4種不同人肝癌細(xì)胞株中的表達(dá)
穩(wěn)定抑制PAK2蛋白表達(dá)的HUH—7細(xì)胞株的建立
CYP2E1基因過(guò)表達(dá)細(xì)胞株的建立及鑒定