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1.
目的:构建表达小鼠NR4A1基因的小分子干扰RNA(siRNA)重组腺病毒载体. 方法:根据siRNA靶序列设计并合成2条互补的64 bp寡核苷酸.pShuttle-H1穿梭质粒经BglⅡ、HindⅢ双酶切后,与退火的寡核苷酸进行连接,构建穿梭质粒pShuttle-H1-siRNA.PmeⅠ酶切pShuttle-H1-siRNA, 然后分别将腺病毒骨架质粒pAdEasy-1和穿梭质粒pShuttle-H1-siRNA转化至BJ-5183感受态细菌中进行同源重组.PacⅠ酶切线性化重组质粒pAdEasy-H1-siRNA后转染AD-293细胞进行病毒包装和扩增.Western blot检测NR4A1基因的表达. 结果:穿梭质粒pShuttle-H1-siRNA经双酶切和测序证实构建成功,进一步构建了表达小鼠NR4A1基因的siRNA重组腺病毒载体,重组腺病毒AdH1-siRNA/NR4A1感染小鼠睾丸间质细胞瘤细胞(MLTC-1)后显著抑制目的蛋白表达(抑制率为70%~90%). 结论:成功构建了表达小鼠NR4A1基因的siRNA重组腺病毒载体AdH1-siRNA/NR4A1,并在MLTC-1中验证其抑制NR4A1蛋白表达,为进一步研究NR4A1基因在多囊卵巢综合征(PCOS)中的作用奠定了基础.  相似文献   

2.
目的:构建针对Skp2的siRNA腺病毒载体。方法:合成针对Skp2的siRNA靶DNA序列及相应阴性对照序列,退火成DNA双链,然后亚克隆穿梭质粒pShuttle-H1,Pme I线性化后,与腺病毒骨架质粒pAdeasy-1在BJ5183细菌中进行同源重组,转染AD293细胞,包装得到pAd-Skp2-siRNA和pAd-Skp2-siRNA-NC重组腺病毒。用病毒体外感染结肠癌SW480细胞,Western blot检测Skp2蛋白表达水平。结果:重组腺病毒载体经酶切、鉴定正确,制备的病毒感染效率高,能显著抑制Skp2蛋白表达。结论:细菌内同源重组成功构建了Ad-Skp2-siRNA重组腺病毒及阴性对照病毒。  相似文献   

3.
目的构建含胰十二指肠同源框-1基因(pancreatic and duodenal homeobox factor 1,PDX1)的重组腺病毒载体,并检测其在人脐带间充质干细胞(human umblic cord msenchymal stem cells,HUCM—SCs)的表达情况。方法用BglII/XhoI酶从pUC57-PDX1酶切PDX1,连接到pShuttle—GFP—CMV重组穿梭载体,得到pShutde—GFP—CMV—PDX1重组穿梭质粒,再将pShuttle—GFP—CMV—PDX1转移到pAdxsi载体上,得到pAdxsi—GFP—PDX1病毒质粒,利用脂质体介导重组腺病毒载体转染293细胞,包装出完整的腺病毒。用重组腺病毒感染HUCMSCs 24h后,经荧光显微镜、RT-PCR、免疫荧光、免疫细胞化学、Western Blot等检测PDX1基因及蛋白的表达。结果通过测序、酶切等鉴定PDX1基因正确插入穿梭质粒中,并与病毒骨架质粒重组,重组腺病毒可高效转染HUCMSCs,RT—PCR检测到PDX1 mRNA在HUCMSCs中表达,经免疫荧光、免疫细胞化学、Western Blot等证实转染PDX1在HUCMSCs胞核中表达。结论成功构建了PDX1腺病毒载体,并在HUCMSCs中有效表达。  相似文献   

4.
张正  刘丹平  陈峻江  郭韬  张男 《辽宁医学院学报》2009,30(5):392-395,399,477
目的构建同时表达具有抗原表位FLAG标记的骨形态发生蛋白2(BMP2)目的蛋白和报告分子绿色荧光蛋白(GFP)的新型腺病毒真核细胞表达载体。方法将去除翻译终止密码子并添加新的酶切识别住点XhoI的BMP2基因定向连入腺病毒穿梭质粒pShuttleCMV—IRES—hrGFP-1。携带BMP2*基因的重组腺病毒穿梭质粒经酶切鉴定、PmeI酶切线性化后转化BJ5183-AD-1大肠杆菌,利用细菌内同源重组机制将BMP2+和GFP基因连同其顺势表达元件重组入腺病毒基因组质粒。用PacI酶切去除其质粒成分,暴露腺病毒基因组的反向末端重复序列,转染293细胞,进行腺病毒的包装,完成新型腺病毒载体AdCMV—BMP2+-IRES—GFP-1的构建。作为阳性对照,同时制备多年来广为应用的BMP2腺病毒表达载体AdCMV—BMP2。以两种载体感染骨髓基质细胞,通过RT—PCR和荧光显微镜分别检测骨形态发生蛋白2和绿色荧光蛋白表达情况;通过碱性磷酸酶活性检测判断BMP2诱导成骨分化作用。结果突变后骨形态发生蛋白2基因序列、重组腺病毒穿梭质粒和重组腺病毒质粒酶切图谱符合预定设计。感染骨髓基质细胞后,新型腺病毒载体可同时表达报告分子GFP和具有诱导成骨分化活性的BMP2。结论成功构建表达BMP2的新型腺病毒载体。  相似文献   

5.
目的构建间隙连接蛋白43(Cx43)和绿色荧光蛋白(GFP)双基因共表达重组腺病毒载体。方法利用PCR方法从真核表达载体pcDNA3.0-Cx43扩增Cx43片断,利用DNA重组技术,将目的基因Cx43克隆至含有报告基因GFP的穿梭质粒pAdTrack-CMV,然后在BJ5183细胞中将重组穿梭质粒pAdTrack-Cx43与pAdeasy-l质粒进行同源重组,产生重组腺病毒载体pAd-Cx43-GFP,用PacⅠ单酶切鉴定重组载体;将pAd-Cx43-GFP转入293细胞中包装,荧光显微镜观察报告基因GFP的表达,Western blot方法检测293细胞中Cx43表达。结果(1)通过PCR方法从载体pcDNA3.0-Cx43扩增出单一条带,与Cx43片断大小相符;(2)重组穿梭质粒pAdTrack-Cx43经NotⅠ/XhoⅠ双酶切后,电泳可见2个大小约为9、1kb条带,证明pAdTrack-Cx43构建成功;(3)同源重组产物pAd-Cx43-GFP经PacⅠ酶切后,电泳可观察到2个大小约为31、4kb左右条带,与预期结果相符,提示同源重组成功;(4)荧光显微镜下观察可见转染pAd-Cx43-GFP后293细胞在培养1-2d即有绿色荧光表达;(5)利用WesternBlot法检测到转染pAd-Cx43-GFP后293细胞中Cx43的表达较未转染组增强。结论Ad-Cx43-GFP重组腺病毒载体构建成功。  相似文献   

6.
目的构建携带人受体活性修饰蛋白-1(RAMP1)基因的腺病毒表达载体,为进一步深人研究RAMPl的功能奠定基础。方法通过基因工程技术将RAMP1基因克隆到穿梭质粒pShutde—GFP—CMV中;I-CeuI+I—SceI双酶切穿梭质粒pShuttle—GFP—CMV—RAMPl,将回收的GFP-CMV—RAMP1片段,亚克隆至腺病毒骨架载体pAdxsi得到重组腺病毒质粒;重组腺病毒质粒酶切线性化后应用脂质体法转染293细胞进行包装扩增,得到重组腺病毒Ad—RAMP1并进行PCR鉴定及滴度测定。结果构建的重组穿梭质粒pShuttle—GFP—cMVl-RAMP1双酶切后,得到O.8kb(RAMP1)和5.1kb(pShuttle—GFP—CMV)两个片段;重组腺病毒质粒pAdxsi—GFP—CMV—RAMP1用XhoI酶切得到7个片段,而作为对照的空腺病毒质粒只得到6个片段;重组腺病毒Ad—RAMP1 PCR鉴定可见阳性扩增条带;病毒滴度检测达4.5×10^11PFU/ml。结论成功构建了携带人RAMP1基因的重组腺病毒载体,为进一步研究RAMPl的功能研究奠定了基础。  相似文献   

7.
目的利用AdEasy-1系统构建胰岛素转录因子之一的MafA基因重组腺病毒(Ad-MafA),并观察其对小鼠肝癌细胞的影响。方法将质粒cDNA3/MafA扩增、酶切获得MafADNA片段插入腺病毒穿梭载体质粒pAdTrack-CMV的巨细胞病毒(CMV)启动子下游,构建重组穿梭载体pAdTrack-CMV-MafA,线性化后与骨架载体AdEasy-1在细菌BJ5183内同源重组得到腺病毒质粒pAd-MafA,经293细胞包装后得到含MafA全长DNA片段的重组腺病毒AdMafA;将Ad-MafA体外感染小鼠肝癌细胞(Hepa1-6),以RT-PCR和Westernblot检测MafA在hepa1-6细胞的表达。结果连接、重组后通过酶切法筛选出pAd-MafA,经293细胞包装,5d后观察到绿色荧光蛋白(GFP)明显表达,通过反复感染HEK细胞扩增得到高滴度的重组腺病毒,Ad-MafA体外感染肝癌细胞1d后,MafA基因表达和蛋白表达明显增加。结论利用新型腺病毒载体AdEasy-1系统可在短期内制备同时表达GFP和MafA的重组腺病毒(Ad-MafA),Ad-MafA体外感染小鼠肝癌细胞可显著提高MafA的表达,这将为基因治疗糖尿病提供新的手段。  相似文献   

8.
目的:利用AdEasy腺病毒载体系统构建含HIV-1病毒蛋白R(viral protein R,Vpr)基因的重组腺病毒,使之有效感染靶细胞前列腺癌细胞系PC-3,并在其中表达Vpr。方法:自表达载体pCI—neo—Vpr中扩增出Vpr基因,插入到pAdTrack—CMV中构建成腺病毒穿梭质粒pAdTrack—Vpr,经限制性内切酶Pme I酶切线性化后,利用磷酸钙介导法将其与腺病毒骨架质粒pAdEasy共同转化到BJ5183大肠埃希菌。挑选同源重组质粒,经Pac I酶切后回收大片段,并将其转染包装细胞AD293。利用荧光显微镜观察AD293细胞中绿色荧光蛋白(GFP)表达。收集第一代重组病毒上清,使之感染AD293细胞得到第二代病毒,如此反复感染AD293细胞3—4轮,使病毒大量扩增。梯度稀释法测定病毒滴度后,分别以感染复数(MOI)为1、5、10的病毒量感染靶细胞PC-3,荧光显微镜观察细胞中GFP表达,并利用RT+PCR和蛋白质印迹技术分别从mRNA和蛋白水平检测目的基因的转录与表达情况。结果:经限制性内切酶检测、GFP表达和病毒上清液PCR证实成功构建了携带Vpr基因的重组腺病毒,滴度为3.0×10^8efu/ml。以MOI为5的重组腺病毒感染24h后,80%以上的靶细胞能够表达GFP,RT—PCR和蛋白质印迹能够同时检测到目的基因Vpr的转录与表达。结论:成功构建含Vpr基因重组腺病毒,并且病毒能够有效感染PC-3细胞,使得目的基因在其中获得大量表达,为进一步研究Vpr蛋白对PC-3肿瘤细胞的影响及其可能涉及的信号通路奠定了基础。  相似文献   

9.
目的 利用AdEasy系统构建鼠内皮抑素(ES)基因重组腺病毒Ad.ES,并观察其在人肺腺癌细胞SPCA-1的表达.方法 采用酶切、连接和转化等方法,将质粒pcDNA3.ES中的ES片段插入腺病毒穿梭质粒载体pAdTrack.CMV,构建重组腺病毒穿梭质粒载体pAdTrack.CMV.ES,经Pme Ⅰ酶切线性化后与含腺病毒基因骨架的质粒载体pAdEasy-1在细菌BJ5183内进行同源重组得到腺病毒质粒pAd.ES,重组腺病毒质粒经PacⅠ酶切后,转染人胚肾293细胞包装成腺病毒颗粒Ad.ES,将病毒上清反复感染293细胞获得高滴度病毒,应用氯化铯(CsCl)梯度离心的方法纯化病毒,利用AdEasy系统上的绿色荧光蛋白(GFP)标签测定重组腺病毒的功能滴度.用2 MOI重组腺病毒Ad.ES体外转导SPCA-1细胞48h,流式细胞仪检测GFP表达阳性率,ELISA法测定细胞培养上清液中ES的含量.结果 双酶切证实重组腺病毒穿梭载体pAdTrack.CMV.ES质粒构建正确,卡那霉素抗性筛选和Pac Ⅰ酶切鉴定证实腺病毒重组质粒构建成功.Pac Ⅰ酶切线性化的重组质粒导入293细胞3d,约20%的细胞表达GEP,回收病毒重复感染293细胞,CsCl梯度离心纯化最终获得约5.6×1010TU/mL滴度的重组病毒.Ad.ES体外转导SPCA-1细胞48h后,细胞GFP阳性率为93%,细胞培养上清液中ES的含量较Ad.GFP感染组和阴性对照组明显增加(P<0.05).结论 应用新型腺病毒载体AdEasy系统可在短期内制备同时表达GFP和ES的重组腺病毒,Ad.ES体外感染人肺腺癌细胞SPCA-1可显著提高ES表达,为进一步研究抗血管生成治疗肺癌奠定了基础.  相似文献   

10.
目的构建携带凋亡抑制蛋白Livinα和绿色荧光蛋白(GFP)基因的重组腺病毒pAd-Livinα。方法 PCR扩增Livinα基因片段,克隆至穿梭质粒pAdTrack-CMV中,再与骨架质粒pAdEasy-1在大肠杆菌BJ5183中同源重组,在人胚肾293细胞中包装扩增得到携带Livinα和GFP基因的重组腺病毒pAd-GFP-Livinα。采用PCR对重组腺病毒进行鉴定。结果经酶切及PCR鉴定证实携带Livinα的重组腺病毒载体构建成功,并可在人胚肾293细胞中表达,病毒滴度2.15×1010 pfu/mL。结论成功构建了携带Livinα和GFP基因的重组腺病毒载体系统,为进一步研究Livinα的生物学特性奠定了基础。  相似文献   

11.
Objective: To evaluatel the value of D-dimers in patients with acute aortic dissection (AAD). Methods: This study consisted of 16 patients with AAD and 27 non-AAD patients. Serum D-dimets were measured by Sta-Liatest D-DI immunoturbidimetric assay. Results: D-dimer level was higher (P < 0.001) in patients with AAD(7.91 ± 5.52 μg/ml) than that in non- AAD group(1.57±1.24 μg/ml). D-dimer was positive (>0.4 μg/ml) in all patients with AAD and in 10 control group patients (37%). Among patients with acute AAD, D-dimers tended to be higher in Stanford A than in Stanford B (8.67 ± 4.31 μg/ml vs. 3.24±1.27 μg/ml, P <0.01). D-dimer values tended to be higher in more extended disease(3.84 ± 1.65 μg/ml, 8.57 ± 3.58 μg/ml and 11.87 ± 5.69 μg/ml in thoracic aorta, thoracic and abdominal aorta, thoracic and abdominal aorta and iliacal arteries, respectively, P < 0.05 for both 8.57 ± 3.58 and 11.87 ± 5.69 vs. 3.84 ± 1.65 ). Including the control group into the analysis, we found a sensitivity of 100%, a negative predictive value of 100%, and a specificity of 66% and a positive predictive value of 64% for D-dimer in diagnosis of AAD in our patients with suspected AAD. Conclusion: D-dimer was elevated in patients with AAD. A negative D-dimer test result could be useful in excluding AAD.  相似文献   

12.
Objective: To set up a simple and reliable rat model of combined liver-kidney transplantation. Methods: SD rats served as both donors and recipients. 4℃ sodium lactate Ringer's was infused from portal veins to donated livers,and from abdominal aorta to donated kidneys, respectively. Anastomosis of the portal vein and the inferior vena cava (IVC) inferior to the right kidney between the graft and the recipient was performed by a double cuff method, then the superior hepatic vena cava with suture. A patch of donated renal artery was anastomosed to the recipient abdominal aorta. The urethra and bile duct were reconstructed with a simple inside bracket. Results: Among 65 cases of combined liver-kidney transplantation, the success rate in the late 40 cases was 77.5%. The function of the grafted liver and kidney remained normal. Conclusion: This rat model of combined liver-kidney transplantation can be established in common laboratory conditions with high success rate and meet the needs of renal transplantation experiment.  相似文献   

13.
目的:评价使用安心颗粒对急诊经皮冠状动脉介入术(PPCI)术后生活质量的影响.方法:将160例接受PPCI的急性ST段抬高型心肌梗死患者随机分为安心颗粒组(术前顿服安心颗粒8.8g,术后安心颗粒4.4 g/次,每日2次)和对照组(仅接受基础药物治疗).所有患者均服用阿司匹林、氯吡格雷和阿托伐他汀.分别在入院时、出院前1d、出院后180 d时,应用心肌梗死多维度量表(MIDAS)、中文版SF-36评价量表对患者生活质量评分.并观察术后30 d以内的出血并发症、血小板减少症发生情况.结果:入院时和出院前1d,两组患者的心肌梗死MIDAS、SF-36量表评分比较无差异(P>0.05);出院后180 d时,与对照组比较,安心颗粒组MIDAS、SF-36评分明显减低(P<0.05);组内与入院时比较,两组出院前1d、出院后180 d时,MIDAS、SF-36评分均降低(P<0.05).两组患者在随访期间均无大量出血、少量出血、重度和极重度血小板减少症发生,安心颗粒组有4例、对照组有7例发生不明显出血(P>0.05).两组发生轻度血小板减少症的患者数比较无差异(P>0.05).结论:PPCI使用安心颗粒,能改善急性ST段抬高型心肌梗死患者的生活质量,且不增加出血风险.  相似文献   

14.
Objective:To investigate the influences of urapidil and nicardipine on rabbit sinus function,atrio-ventricular node function and hemodynamics.Methods:Thirty-two Angora's rabbits were selected and randomly divided into four groups.U1 group:urapidil 0.25 mg/kg;U2 group:urapidil 0.5 mg/kg;N1 group:nicardipine 10 μg/kg;N2 group:nicardipine 20 μg/kg.All these medicine were administrated within 30 seconds.Measurements were taken before and after the administration of urapidil or nicardipine for the following data:mean blood pressure(MAP),heart rate(HR),sino-atrial conduction time(SACT),maximal sinoatrial recovery time(SNRTmax)corrected sinus node recovery time(CSNRT),index of sinus node recovery time(SNRTI),Wenckebach A-V conduction frequency (WB),and P-R interval.Results:Significant MAP and HR changes were identified in all of the four groups before and after administration of both urapidil and nicardipine.No significant changes could be found in the rest of the parameters.Intergroup analysis showed that SACT and CSNRT of N1 and N2 groups were shorter than those of the U2 group(P<0.01);the MAP decreased(P<0.01)and the HR increased drastically(P<0.01).Conclusions:Neither urapidil(0.25 mg/kg,0.5 mg/kg)nor nicardipine(10μg/kg,20μg/kg)has any significant influence on rabbit sinus function or rabbit atrio-ventricular node function.Nicardipine could be a better choice than urapidil for parafunctional sinus node patients.  相似文献   

15.
Objective:To investigate the gene expression of osteoprotegerin(OPG) and osteoclast differentiation factor(ODF) in the bone tissue of patients with hip fracture due to osteoporosis. Methods:OPGmRNA and ODFmRNA in the bone tissue in 50 cases of osteoporosis sufferers(over 50 years old) with hip fracture(Observer Group) and 30 cases of hip facture sufferers with no osteoporosis(Control group) were analyzed with the Semi-Quantitative RT-PCR method. Results:The mRNA expressed of ODF, OPG were both high in the patients with hip fracture. In the control group, the expression of OPG mRNA was observed, while the expression of ODF mRNA was very slight. Conclusion:Aged patients contained all signals including OPG, ODF that are essential for inducing osteoclastogenesis and promoting bone resorption.  相似文献   

16.
Objective:To investigate the clinical features, pathological characteristics and immunophenotype of solid-pseudopapillary tumor of the pancreas(SPTP). Methods:Nine surgically treated cases of SPTP were retrospectively reviewed. Hematoxylin and Eosin(HE) staining and immunohistochemical staining were used to analyze all cases, and the general clinical data was collected. Results:Six patients were asymptomatic except for a palpable mass. Two patients complained of vague-epigastric pain. One patient appeared jaundice. The tumor was encapsulated and solid tissues alternately with cystic tissues. Histologically, the histological structure of solid portion was pseudopapillary with a fibrovascular core. Tumor cells were uniform and medium-sized which were arranged in sheets ets or nests or pseudopapillary patterns. Immunohistochemical studies demonstrated that SPTP proved positive in vimentin(9/9 cases), AAT(9/9 cases), NSE(9/9 cases), ACT(7/9 cases), CK20(2/9 cases), CgA(1/9 cases), S-100(3/gcases), PR(4/gcases), Syn(3/9 cases) and CD56(5/9cases), negative in CEA and ER. Conclusion:SPTP is a tumor predominantly occurring in young women frequently without special symptoms. This tumor has various characteristical histological patterns with different immunophenotype.  相似文献   

17.
In recent years, the author of this essay has applied electro-acupuncture combined with the trigger point needle-embedding for treatment of primary trigeminal neuralgia in 31 cases, yielding satis- factory results as reported in the following.  相似文献   

18.
Objective: To explore the role of matrix metalloproteinase-1,2 (MMP-1, MMP-2) and tissue inhibitor of matrix metalloproteinases-1 (TIMP-1) in endometriosis. Methods: The eutopic and ectopic endometria from 40 subjects suffering from endometriosis and regular.endometria from 40 subjects (excluding endometriosis) were collected and examined by in situ hybridization technology and western blot assay. Results: Both expressions of MMP-1 and -2 were stronger in ectopic endometrium and eutopic endometrium than in normal endometrium. On the contrary, the expression of TIMP-1 in ectopic endometrium and eutopic endometrium was lower. The differences were significant (P 〈 0.01 ). Moreover, there was no relationship among the expressions of MMP-1, 2 and TIMP-1 in ectopic endometrium. Conclusion: The expressions of MMP-1, 2 and TIMP-1 lose balance and lack of periodic changes in ectopic endometrium , which explains the biological invasive behavior of endometriosis. It was suggested-that regulating the balance between the MMPs and TIMP-1 should be an ideal therapeutic target to endometriosis.  相似文献   

19.
Prof. SHI Da-zhuo, Ph.D., male, was born on March 20, 1960. Prof. SHI entered the Ph.D. program in 1990 at the China Academy of Chinese Medical Sciences under the supervision of Prof. CHEN Ke-ji, majoring in the treatment of cardiovascular diseases. After receiving his Ph.D. degree in 1993, Prof. SHI started working at the Cardiovascular Center in Xiyuan Hospital affiliated to China Academy of Chinese Medical sciences.  相似文献   

20.
《中国结合医学杂志》2008,14(2):159-159
The 6th National General Congress of Chinese Association of Integrative Medicine (CALM) was convened at 19-20, April 2008 in Beijing. Academician CHEN Zhu, the minister of Ministry of Health indicated at the congress that the integration of Chinese and Western medicine is very well in keeping with the situation of our country and the general rule of development in medical science; and as a good integration of Chinese medicine and Western medicine, it is mutually beneficial and advantageous to both of them. Seeing the creativity shown in integrative medical investigation in theoretic and methodological sides, we should and must persist in and develop it.  相似文献   

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