大鼠TRESK基因重组腺病毒载体的构建

目的 构建大鼠TRESK基因重组腺病毒载体.方法 从大鼠背根神经节细胞中克隆TRESK全长cDNA,进行PCR鉴定及DNA测序验证,构建以CMV启动子转录调控的pAd/CMV/V5DEST-TRESK.转化DH5α大肠杆菌,挑选阳性重组克隆行PCR鉴定并行DNA测序.将测序正确的质粒经PacⅠ酶切线性化,转染包装293T细胞,包装产生腺病毒,逐孔稀释滴度法测定病毒滴度.结果 从大鼠背根神经节细胞中克隆的TRESK全长cDNA为781 bp,DNA测序验证DNA序列与GeneBank 中收录的大鼠TRESK序列完全一致.以pAD-GFP空载体为对照,pAD/CMV/V5-DEST-TRESK gDNA为模板的PCR扩增,目的 片段781 bp,鉴定结果 与预期相符.腺病毒滴度为1.31×109 TU/ml.结论 本研究成功地构建了大鼠TRESK基因重组腺病毒载体:pAD/CMV/V5-DEST-TRESK.

Abstract：

Objective To construct rat TRESK gene recombinant adenovirus expression vector.Methods TRESK full-length cDNA was cloned from rat dorsal root ganglion cells and confirmed by RT-PCR and sequencing. pAd/CMV/V5-DEST-TRESK was then constructed under the control of CMV-promotor. DH5α colibacillus was translated and the positive recombinants were subsequently identified by PCR and DNA sequencing. 293T cells were cotransfected and packed to produce adenovirus. Results The titer of virus was tested using Hole-by-dilution titer method. The full length of TRESK from rat dorsal root ganglion cells is 781 bp. It was demonstrated that the DNA sequencing was completely consistent with TRESK sequencing of rat recorded in GeneBank. The PCR amplification of the pAd/CMV/V5-DEST-TRESK gDNA was matched with pAD-GFP blank vector as anticipated. The titer of the concentrated virus was 1.31×109 TU/ml. Conclusion Rat TRESK gene recombinant adenovirus vector is constructed successfully.     

腺病毒载体介导蛋白激酶B基因转染大鼠胰岛的研究

Objective To confirm in vitro gene delivery to rat islets by adenovirus vectors. Methods The adenovirus vector, AdS-Aktl, was constructed following the standard molecular methods. The purified islets were infected with either Ad5-EGFP or Ad5-Akt1 adenovirus the multiplicity of infection (MOI) was 500). The expression of Aktl in Ad5-Akt1 islet transfectants was confirmed by using Western blot. Results Adenovirus vector Ad5-Akt1 was constructed and the the titer of the virus was 5.3 × 109 pfu/ml. The transfection efficiency of Ad5-EGFP was 60% -70%, and Akt1 protein was detected in Ad5-Aktl islet transfectants. Conclusion Adenovirus is efficient to deliver exogenous gene into rat islets in vitro.     

腺病毒载体介导蛋白激酶B基因转染大鼠胰岛的研究

Objective To confirm in vitro gene delivery to rat islets by adenovirus vectors. Methods The adenovirus vector, AdS-Aktl, was constructed following the standard molecular methods. The purified islets were infected with either Ad5-EGFP or Ad5-Akt1 adenovirus the multiplicity of infection (MOI) was 500). The expression of Aktl in Ad5-Akt1 islet transfectants was confirmed by using Western blot. Results Adenovirus vector Ad5-Akt1 was constructed and the the titer of the virus was 5.3 × 109 pfu/ml. The transfection efficiency of Ad5-EGFP was 60% -70%, and Akt1 protein was detected in Ad5-Aktl islet transfectants. Conclusion Adenovirus is efficient to deliver exogenous gene into rat islets in vitro.     

腺病毒载体介导蛋白激酶B基因转染大鼠胰岛的研究

Objective To confirm in vitro gene delivery to rat islets by adenovirus vectors. Methods The adenovirus vector, AdS-Aktl, was constructed following the standard molecular methods. The purified islets were infected with either Ad5-EGFP or Ad5-Akt1 adenovirus the multiplicity of infection (MOI) was 500). The expression of Aktl in Ad5-Akt1 islet transfectants was confirmed by using Western blot. Results Adenovirus vector Ad5-Akt1 was constructed and the the titer of the virus was 5.3 × 109 pfu/ml. The transfection efficiency of Ad5-EGFP was 60% -70%, and Akt1 protein was detected in Ad5-Aktl islet transfectants. Conclusion Adenovirus is efficient to deliver exogenous gene into rat islets in vitro.     

腺病毒载体介导蛋白激酶B基因转染大鼠胰岛的研究

Objective To confirm in vitro gene delivery to rat islets by adenovirus vectors. Methods The adenovirus vector, AdS-Aktl, was constructed following the standard molecular methods. The purified islets were infected with either Ad5-EGFP or Ad5-Akt1 adenovirus the multiplicity of infection (MOI) was 500). The expression of Aktl in Ad5-Akt1 islet transfectants was confirmed by using Western blot. Results Adenovirus vector Ad5-Akt1 was constructed and the the titer of the virus was 5.3 × 109 pfu/ml. The transfection efficiency of Ad5-EGFP was 60% -70%, and Akt1 protein was detected in Ad5-Aktl islet transfectants. Conclusion Adenovirus is efficient to deliver exogenous gene into rat islets in vitro.     

腺病毒载体介导蛋白激酶B基因转染大鼠胰岛的研究

Objective To confirm in vitro gene delivery to rat islets by adenovirus vectors. Methods The adenovirus vector, AdS-Aktl, was constructed following the standard molecular methods. The purified islets were infected with either Ad5-EGFP or Ad5-Akt1 adenovirus the multiplicity of infection (MOI) was 500). The expression of Aktl in Ad5-Akt1 islet transfectants was confirmed by using Western blot. Results Adenovirus vector Ad5-Akt1 was constructed and the the titer of the virus was 5.3 × 109 pfu/ml. The transfection efficiency of Ad5-EGFP was 60% -70%, and Akt1 protein was detected in Ad5-Aktl islet transfectants. Conclusion Adenovirus is efficient to deliver exogenous gene into rat islets in vitro.     

腺病毒载体介导蛋白激酶B基因转染大鼠胰岛的研究

Objective To confirm in vitro gene delivery to rat islets by adenovirus vectors. Methods The adenovirus vector, AdS-Aktl, was constructed following the standard molecular methods. The purified islets were infected with either Ad5-EGFP or Ad5-Akt1 adenovirus the multiplicity of infection (MOI) was 500). The expression of Aktl in Ad5-Akt1 islet transfectants was confirmed by using Western blot. Results Adenovirus vector Ad5-Akt1 was constructed and the the titer of the virus was 5.3 × 109 pfu/ml. The transfection efficiency of Ad5-EGFP was 60% -70%, and Akt1 protein was detected in Ad5-Aktl islet transfectants. Conclusion Adenovirus is efficient to deliver exogenous gene into rat islets in vitro.     

腺病毒载体介导蛋白激酶B基因转染大鼠胰岛的研究

Objective To confirm in vitro gene delivery to rat islets by adenovirus vectors. Methods The adenovirus vector, AdS-Aktl, was constructed following the standard molecular methods. The purified islets were infected with either Ad5-EGFP or Ad5-Akt1 adenovirus the multiplicity of infection (MOI) was 500). The expression of Aktl in Ad5-Akt1 islet transfectants was confirmed by using Western blot. Results Adenovirus vector Ad5-Akt1 was constructed and the the titer of the virus was 5.3 × 109 pfu/ml. The transfection efficiency of Ad5-EGFP was 60% -70%, and Akt1 protein was detected in Ad5-Aktl islet transfectants. Conclusion Adenovirus is efficient to deliver exogenous gene into rat islets in vitro.     

腺病毒载体介导蛋白激酶B基因转染大鼠胰岛的研究

Objective To confirm in vitro gene delivery to rat islets by adenovirus vectors. Methods The adenovirus vector, AdS-Aktl, was constructed following the standard molecular methods. The purified islets were infected with either Ad5-EGFP or Ad5-Akt1 adenovirus the multiplicity of infection (MOI) was 500). The expression of Aktl in Ad5-Akt1 islet transfectants was confirmed by using Western blot. Results Adenovirus vector Ad5-Akt1 was constructed and the the titer of the virus was 5.3 × 109 pfu/ml. The transfection efficiency of Ad5-EGFP was 60% -70%, and Akt1 protein was detected in Ad5-Aktl islet transfectants. Conclusion Adenovirus is efficient to deliver exogenous gene into rat islets in vitro.     

携带超抗原SEA基因的特异性溶瘤腺病毒载体的构建和鉴定

目的 构建携带超抗原SEA基因的肿瘤特异性溶瘤腺病毒表达载体.方法 采用聚合酶链反应(PCR)技术,从产SEA的葡萄球菌标准菌株ATCC13565基因组DNA中获得SEA全长基因序列,酶切后克隆入pCA13质粒,构建重组病毒质粒pCA13-SEA.将鉴定正确的pCA13-SEA与含有腺病毒右臂的质粒pBHGE3通过Lipofectamine 2000共转染HEK293细胞,经同源重组产生重组腺病毒Ad-SEA.Ad-SEA在293细胞中大量扩增并通过氯化铯密度梯度离心法纯化、测定其滴度.结果 克隆得到771bpSEA全长基因.经PCR扩增、酶切鉴定、序列测定证实,SEA基因成功克隆到溶瘤腺病毒载体中,可实现SEA基因的表达,且病毒滴度达6.5×109pfu/ml.结论 成功构建表达超抗原SEA基因的溶瘤腺病毒载体.     

低氧诱导因子-1的病毒载体制备及感染效果

目的 制备低氧诱导因子(HIF)-1腺病毒载体并评价其对表皮角质细胞的感染效果.方法 Ad/HIF-1质粒经酶切鉴定后,以4μg质粒转染1.2×106个HEK293细胞,2 d后荧光显微镜下观察转染效率.1周后收集细胞及上清并感染HEK293细胞进行病毒扩增,待扩增的细胞及上清量达300 ml时进行病毒纯化及滴度测定.最后用制备的病毒载体感染表皮角质细胞,流式测定其感染效果.结果 Ad/HIF-1质粒酶切鉴定正确;转染或感染HEK293细胞后有绿色荧光蛋白(GFP)表达;获得的腺病毒滴度为1.8×1011PFu/ml.病毒以MOI=50感染表皮细胞,2 d后GFP阳性细胞的比例为97.46%.结论 成功制备了HIF-1腺病毒载体,且感染表皮角质细胞后能得到较高的感染效率,从而为腺病毒介导的基因功能研究提供理论基础.     

携带前强啡肽基因的Ad5 F35重组腺病毒制备及鉴定

目的 用Ad5F35载体制备携带前强啡肽基因的重组腺病毒Ad5F35-PDP并对其进行鉴定.方法 利用NheI和Agel分别对合成的目的 基因prodynorphin聚合酶链反应(PCR)产物和pDC316-LacZ-a载体质粒进行双酶切.将PDP目的 基因片段和线性化的pDC316连接,克隆构建pDC316-PDP.pDC316-PDP与腺病毒骨架pBHG-fiber5/35共转染293细胞制备Ad5F35-PDP重组腺病毒,收获并纯化病毒,检测重组病毒滴度,运用PCR进行鉴定.结果 编码PDP的基因序列经测序鉴定证实与Gene Bank中的一致,pDC316-PDP构建成功.pDC316-PDP与腺病毒骨架共转染293细胞后见明显的毒斑,说明两者在293细胞中同源重组并包装成功.经PCR证实Ad5F35-PDP重组腺病毒构建完成.病毒滴度为1×1012v.P./ml.结论 本实验成功制备了含PDP全序列的高滴度、高纯度的Ad5F35-PDP重组腺病毒,为下一步进行该重组病毒生物安全性能和生物学功能研究及今后应用Ad5F35-PDP重组腺病毒对吗啡成瘾患者进行基因治疗奠定了基础.     

大鼠PnNOS基因修饰脂肪源性干细胞的构建

目的 构建过表达大鼠阴茎神经源性一氧化氮合酶（PnNOS）基因大鼠脂肪源性干细胞（ADSCs）,为基因修饰ADSCs移植治疗勃起功能障碍（ED）大鼠模型提供种子细胞.方法 获取大鼠PnNOS基因,并与线性化的腺病毒真核表达载体pDC315-EGFP定向克隆连接.构建正确的pDC315-PnNOS-EGFP穿梭质粒转染293 T细胞,采用Western Blot检测PnNOS基因在293 T细胞中的表达情况.利用AdMax腺病毒包装系统包装产生重组腺病毒,包装后扩增纯化并测定病毒滴度.PnNOS基因重组腺病毒转染大鼠ADSCs,观察GFP表达情况和Western Blot检测PnNOS基因表达情况.结果 经PCR鉴定、限制性酶切分析、测序鉴定和目的质粒Western Blot表达检测鉴定,证实pDC315-PnNOS-EGFP重组腺病毒载体构建成功.重组腺病毒包装成功且病毒滴度为5.0×109 PFU/ml.Western Blot于大鼠ADSCs中检测到约161 KDa大小条带,其与PnNOS蛋白分子量大小基本相一致.结论 大鼠PnNOS基因修饰的ADSCs构建成功,从而为基因修饰ADSCs移植治疗ED提供了良好的基因工程细胞.     

表达前强啡肽基因的Ad5型腺病毒载体的构建及鉴定

目的 构建且鉴定含前强啡肽基因(prodynorphin)的血清5型腺病毒载体(Ad5).方法 应用分子生物学方法 将前强啡肽基因序列克隆入腺病毒穿梭质粒pDC316-PDP,后者与骨架质粒共转染HEK293细胞,包装得到含前强啡肽转基因的腺病毒Ad5-PDP.用聚合酶链反应(PCR)方法 对转基因病毒进行鉴定,TCID50法测定病毒滴度.结果 PCR法证实转基因正确插入了Ad5型病毒基因组内,且没有野生型病毒污染,病毒滴度为1×1012v.p./mL.PCR鉴定Ad5-PDP重组成功.结论 获得的Ad5-PDP滴度高,感染性好,可以用于转基因治疗的实验研究.     

核因子-κB特异性的RNA干扰腺病毒的构建及其对枯否细胞内毒素反应的影响

目的 构建针对大鼠核因子(NF)-κB的腺病毒,采用RNA干扰方法观察其对内毒素诱导的大鼠肝枯否细胞(KC)NF-κB抑制和肿瘤坏死因子(TNF)-α、白细胞介素(IL)-6释放的影响.方法 合成双链寡核苷酸siNF-κB克隆人pShuttleH1载体,取0.5μg线性化后的pShuttleH1-siNF-κB电转化BJ5183感受态细菌获取重组腺病毒骨架质粒;取线性化的重组质粒4μg利用Lipo-fectamineTM2000转染骨架质粒至HEK 293细胞获取重组腺病毒Ad-siNF-κB;TCID50法测定病毒滴度;腺病毒以MOI=10感染原代培养大鼠肝枯否细胞,观察对内毒素诱导的NF-κB抑制和TNF-α、IL-6释放的影响.结果 目的 基因成功克隆入腺病毒,病毒滴度为5.32×109pfu/ml.转染腺病毒Ad-siNF-κB后的内毒素诱导的肝KC及NF-κB mRNA及TNF-α、IL-6的表达均明显减弱.结论 成功构建表达NF-κB siRNA的腺病毒,具有良好的抑制NF-κB和TNF-α、IL-6的作用.     

重组Akt腺病毒的构建及其在肝硬化大鼠肝脏中的表达

目的:探讨持续活化Akt且带有HA标签(myr-HA-Akt)基因的重组腺病毒在肝硬化大鼠肝脏中的表达特性。方法:酶切正向插入目的基因的真核表达载体pcDNA3.1-myr-HA-Akt,获得myr-HA-Akt cDNA后，将其定向克隆到穿梭质粒pDC316中,然后将重组质粒与病毒骨架质粒pBHGloxΔE1,3Cre共转染293 细胞,获得复制缺陷型重组腺病毒Ad-myr-HA-Akt,并进行扩增、纯化。通过观察腺病毒感染293细胞后是否出现细胞病变效应;PCR和基因测序方法对所构建病毒进行鉴定，并采用TCID50法检测病毒滴度。自尾静脉注射重组腺病毒Ad-myr-HA-Akt感染肝硬化模型大鼠。免疫印迹法检测大鼠肝组织内Akt 和p-Akt蛋白的表达。结果:感染的293 细胞出现明显的细胞病变效应，PCR产物电泳证实重组腺病毒的存在，基因测序证实myr-HA-Akt的cDNA正确插入穿梭质粒且与pBHGloxΔE1,3Cre正确同源重组;病毒滴度为5.5×1011 vp/mL。从蛋白水平证实感染病毒的肝硬化模型大鼠有外源性Akt基因的表达。结论:构建的重组腺病毒Ad-myr-HA-Akt能有效地感染肝硬化模型大鼠,并可在模型大鼠中正确转录和翻译，为进一步研究腺病毒介导的Akt基因对肝硬化的治疗奠定了实验基础。     

人PPFP基因的重组慢病毒载体的构建和表达

目的 构建含人PAX8/PPARγ/融合基因(PPFP)基因重组慢病毒载体并检测其表达性能.方法 从已构建好的含PPFP的质粒克降模板PEGFP-C-PPFP中,利用聚合酶链反应(PCR)方法钓取目的 基因PPFP,将该基因克隆到慢病毒载体表达质粒pGC-FU(含Flag基因)中,得到重组的pGC-FU-PPFP,通过PCR、酶切、测序和分析比对验证PPFP基因后,将pGC-FU-PPFP质粒和包装质粒pHelper1.0、pHelper2.0共同转染人胚胎肾上皮细胞株293T细胞,获得携带PPFP基因和Flag基因的重组慢病毒,收集并浓缩病毒上清液,测定重组病毒的滴度.通过Western blot鉴定PPFP-Flag融合蛋白在靶细胞内的表达进一步验证目的 基因在靶细胞中的表达.结果 经PCR扩增获得2591 bp的目的 基因片段,构建的重组质粒经PCR、酶切及测序和分析比对鉴定正确;该质粒与包装质粒共转染293T细胞获取的慢病毒滴度达3.5×10~7转导单位TU/ml;感染的293T细胞,Western blot结果显示条带大小为90 KDr,可判断目的 基因PPFP在293T细胞中表达.结论 成功构建PPFP基因慢病毒载体质粒pGC-FU-PPFP,并建立慢病毒过表达系统.     

装载超抗原SEA基因的由前列腺特异性抗原和端粒酶逆转录酶启动子双调控靶向前列腺癌的溶瘤腺病毒载体的构建

目的 构建表达超抗原金黄色葡萄球菌肠毒素(SEA)基因的由前列腺特异性抗原(PSA)启动子及端粒酶逆转录酶(hTERT)启动子双调控的特异性增殖溶瘤腺病毒SG504-SEA.方法 从前列腺癌组织基因组DNA中获得522 bp大小的PSA启动子序列,将PSA启动子克隆到由hTERT启动子调控的特异性增殖溶瘤腺病毒载体SG502中.得到靶向前列腺癌细胞的双调控溶瘤腺病毒载体SG504.将已构建好的含有771 bp大小SEA基因片段的病毒骨架质粒PPE3-cdb-SEA与SG504用Lipofectamine 2000共转染至293细胞.共转染后9～14 d出现病毒空斑,经过3次病毒空斑纯化,经鉴定正确的腺病毒命名为SG504.SEA,即携带SEA基因的双调控靶向前列腺癌的特异性溶瘤腺病毒.结果 经聚合酶链反应(PCR)及酶切鉴定,SEA基因成功克隆到病毒载体中,可以表达SEA基因,且病毒滴度为2.0×10~(10)pfu/ml.结论 成功构建表达超抗原SEA基因的双调控选择增殖型溶瘤腺病毒SG504-SEA.