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1.
含具有哺乳动物细胞活性的启动子的重组杆状病毒(BacMam病毒)可有效转导多种哺乳动物细胞,并被广泛用于开发新型非复制型载体疫苗.将水泡性口炎病毒G蛋白(VSV-G)基因插入多角体启动子下游,得到经修饰的杆状病毒转移载体,将对虾白斑综合症病毒(WSSV)ie1启动子控制下的猪瘟病毒E2基因表达盒插入此载体中,构建了BacMam病毒BacMam/G-ie1-E2,以其感染Sf9细胞和转导HeLa细胞,通过间接免疫荧光试验和Western blot分析检测E蛋白的表达,同时用BacMam病毒直接免疫小鼠,用检测猪瘟病毒抗体的间接ELISA方法检测免疫小鼠血清抗体,用基于CFSE和WST-8的淋巴细胞增殖试验评价其细胞免疫应答.结果显示,BacMam/G-ie1-E2能同时在昆虫细胞和哺乳动物细胞中高效表达E2蛋白,免疫小鼠能诱导产生针对猪瘟病毒的特异性抗体,免疫小鼠脾细胞经猪瘟病毒刺激后能诱导特异性的淋巴细胞增殖.这表明,由BacMam病毒介导的基因转移有望用于开发针对猪瘟病毒的非复制型载体疫苗.  相似文献   

2.
用杆状病毒表达载体系统表达小鼠Bruton酪氨酸激酶(Brutontyrosinekinase,Btk).构建重组转染载体时,于Btk起始码的上游插入了一段H902序列.用重组转染载体、苜蓿夜蛾核型多角体病毒线性DNA和质脂体共转染Sf9昆虫细胞,经过对重组杆状病毒三轮扩增后,用H902抗体检测表明,昆虫细胞中Btk的表达已达最高水平.对表达后Btk自身磷酸化检测表明,该激酶具有自身磷酸化活性.从而证实Btk在昆虫细胞中的表达获得了成功  相似文献   

3.
目的:构建人FGFR2Ⅲc重组慢病毒表达系统,感染并筛选获得大鼠肌原细胞L6表达人FGFR2Ⅲc的重组细胞株,初步研究FGFR2Ⅲc对L6细胞的作用.方法:从人胎盘组织中获得FGFR2Ⅲc基因,并克隆到Gateway慢病毒系统的入门载体pENTR-11,采用LR重组酶将重组的pENTR-FGFR2Ⅲc和表达载体pLenti6/V5-DEST进行重组反应得到pLenti6/V5-DEST-FGFR2Ⅲc.将该重组表达载体和Viral Packaging Mix包装质粒通过阳离子脂质体共转染293FT细胞,待细胞完全裂解后收集重组慢病毒颗粒上清液;取适量上清液感染L6细胞,杀稻瘟毒素筛选2~4周,挑单克隆细胞进一步扩大培养并建立重组细胞株.RT-PCR、间接免疫荧光和Western blot鉴定重组细胞株中目的基因FGFR2Ⅲc的表达,bFGF和硫酸乙酰肝素共同诱导各重组L6细胞株后流式细胞术分析细胞周期,形态观察检测成肌分化水平,并通过相关信号通路抑制剂分析与各信号通路的关系.结果:构建了舍人FGFR2Ⅲc基因的重组慢病毒表达载体,获得的重组慢病毒颗粒能高效感染L6细胞,RT-PCR和间接免疫荧光实验说明正确表达目的基因;流式细胞术结果表明L6中高表达FGFR2Ⅲc的重组细胞株的G1/G0期的细胞增多;各重组细胞株分别加入Erk1/2和p38通路抑制剂抑制诱导2天,发现重组细胞株发生不同的形态变化.结论:通过慢病毒表达系统,成功构建高表达FGFR2Ⅲc的重组L6细胞株,FGFR2Ⅲc通过Erk1/2和p38通路影响了L6细胞的形态发生,该结果为下一步在大鼠L6细胞中研究FGFR2Ⅲc基因与成肌分化功能相关性奠定基础.  相似文献   

4.
目的:构建人FGFR2IIIc重组慢病毒表达系统,感染并筛选获得大鼠肌原细胞L6表达人FGFR2IIIc的重组细胞株,初步研究FGFR2IIIc对L6细胞的作用。方法:从人胎盘组织中获得FGFR2IIIc基因,并克隆到Gateway慢病毒系统的入门载体pENTR-11,采用LR重组酶将重组的pENTR-FGFR2IIIc和表达载体pLenti6/V5-DEST进行重组反应得到pLenti6/V5-DEST-FGFR2IIIc。将该重组表达载体和Viral Packaging Mix包装质粒通过阳离子脂质体共转染293FT细胞,待细胞完全裂解后收集重组慢病毒颗粒上清液;取适量上清液感染L6细胞,杀稻瘟毒素筛选2~4周,挑单克隆细胞进一步扩大培养并建立重组细胞株。RT-PCR、间接免疫荧光和Western blot鉴定重组细胞株中目的基因FGFR2IIIc的表达,bFGF和硫酸乙酰肝素共同诱导各重组L6细胞株后流式细胞术分析细胞周期,形态观察检测成肌分化水平,并通过相关信号通路抑制剂分析与各信号通路的关系。结果:构建了含人FGFR2IIIc基因的重组慢病毒表达载体,获得的重组慢病毒颗粒能高效感染L6细胞,RT-PCR和间接免疫荧光实验说明正确表达目的基因;流式细胞术结果表明L6中高表达FGFR2IIIc的重组细胞株的G1/G0期的细胞增多;各重组细胞株分别加入Erk1/2和p38通路抑制剂抑制诱导2天,发现重组细胞株发生不同的形态变化。结论:通过慢病毒表达系统,成功构建高表达FGFR2IIIc的重组L6细胞株,FGFR2IIIc通过Erk1/2和p38通路影响了L6细胞的形态发生,该结果为下一步在大鼠L6细胞中研究FGFR2IIIc基因与成肌分化功能相关性奠定基础。  相似文献   

5.
旨在构建人C-Src蛋白酪氨酸激酶(Csk)基因真核表达系统。从He La细胞中提取总的RNA,通过RT-PCR获得Csk基因全长c DNA序列,并将其克隆至真核表达载体p ENTER中,构建重组质粒p ENTER-Csk-his。重组质粒转染293T细胞48h后通过SDS-PAGE、Western blot检测Csk蛋白表达情况,间接免疫荧光进行蛋白定位,通过镍螯合的磁珠法纯化Csk蛋白,hispulldown及CO-IP检测表达蛋白的活性。结果显示,经双酶切及测序鉴定,真核表达载体p ENTER-Csk-his正确没有突变,SDSPAGE及Western blot均可检测到大小约为51 k D的目的蛋白,说明Csk蛋白在293T细胞中表达成功,间接免疫荧光定位重组Csk蛋白在细胞质中表达,通过磁珠纯化得到Csk蛋白,最后通过his-pulldown及CO-IP发现Csk能够与IGF1R、SHC1相互作用,说明表达的Csk蛋白具有生物学活性。成功获得Csk基因全长序列,并构建重组p ENTER-Csk-his真核表达质粒,在真核细胞293T的细胞质中获得高效表达且表达的蛋白具有生物学活性。  相似文献   

6.
本研究利用Bac-To-Bac杆状病毒表达系统构建重组禽呼肠孤病毒(Avian reovirus,ARV)σC基因的杆状病毒,感染sf9细胞获得表达重组蛋白。首先,将ARVσC基因克隆至pFastBacHTA载体,构建重组供体载体pFσC,将其转化大肠杆菌DHl0Bac感受态细胞,使σC基因整合到Bacmid穿梭载体中,获得重组穿梭载体BacmidσC。通过脂质体介导将其转染到sf9昆虫细胞中,获得重组杆状病毒rBacσC。通过Western Blot、间接免疫荧光试验(IFA)进行检测,结果显示:σC蛋白在重组杆状病毒rBacσC感染的sf9昆虫细胞中获得正确表达,分子质量约为37kD,表达的σC蛋白具有良好的反应活性。  相似文献   

7.
将编码鸡的白细胞介素 1 8(chickeninterleukine 1 8,ChIL 1 8)成熟蛋白的基因亚克隆到杆状病毒转移载体pMelBacB上 ,构建真核转移载体pMelBacBChIL 1 8,经限制性内切酶消化、ChIL 1 8特异引物PCR鉴定和确证性序列测定 ,证明目的基因正确克隆到载体的预期位点。将纯化的pMelBacBChIL 1 8质粒与杆状病毒DNA(Bac N BlueTM DNA)共转染sf9昆虫细胞 ,经四轮蓝斑筛选纯化 ,获得了重组杆状病毒 ,命名为rBaculovirusChIL 1 8。提取病毒染色体DNA ,经ChIL 1 8特异引物和重组杆状病毒特异引物PCR鉴定 ,证明获得了纯化的重组杆状病毒。用该重组病毒接种sf9昆虫细胞 ,收获接种后不同时间的细胞进行SDS PAGE电泳。结果表明ChIL 1 8基因在昆虫细胞中获得了表达 ,表达的重组蛋白分子量约为 2 3kDa。应用在大肠杆菌原核表达系统中表达的重组蛋白制备的兔抗ChIL 1 8多克隆抗体进行Westernblot分析 ,表明本研究真核系统表达的ChIL 1 8成熟蛋白和前期原核系统表达的ChIL 1 8成熟蛋白均具有生物学活性。  相似文献   

8.
将汉滩病毒囊膜糖蛋白G1与核蛋白(NP)部分片段以不同方式拼 接,构建G1S0.7或S0.7G1嵌合基因,分别插入杆状病毒表达载体pFBD,转化DH10Bac致敏菌, 获得含有嵌合基因的重组穿梭质粒Bacmid,用其转染Sf9细胞,快速筛选出含有G1S0.7或S0.7 G1嵌合 基因的重组杆状病毒,在昆虫细胞中表达外源融合蛋白.利用间接免疫荧光、ELISA和免疫 印迹对表达产物进行检测.结果表明,含G1S0.7嵌合基因之重组杆状病毒可在昆虫细胞中表 达出融合蛋白,该蛋白可被抗汉滩病毒核蛋白及糖蛋白G1特异性单抗所识别,其分子量约97 kD;含S0.7G1嵌合基因之重组杆状病毒在昆虫细胞中表达的融合蛋白,只能被抗汉滩病毒核 蛋白特异性单抗所识别,其分子量约43kD.上述结果提示,G1S0.7嵌合基因可能在昆虫细胞 中表达出完整的具有生物学活性的融合蛋白,S0.7G1嵌和基因的昆虫细胞表达产物不完整 ,且生物学活性不如G1S0.7嵌合基因的表达产物.  相似文献   

9.
重组杆状病毒感染昆虫细胞是表达外源蛋白常用的一种方法。为有效鉴定转染的细胞中是否产生了重组病毒粒子,对质粒pFastBacI进行改造,构建了极早期基因ie1启动子控制的绿色荧光蛋白egfp基因表达盒,以及多角体基因启动子控制的外源DNA的一个通用型双表达载体;通过酶切、连接的方式,将家蚕二分浓核病毒ns1基因连接到多角体启动子下游;在转座酶的介导下,该供体质粒上部分序列可转座到穿梭载体Bm-Bacmid上,进而构建可同时表达egfp和ns1基因的重组杆粒。将构建的该重组杆粒DNA转染BmN细胞,通过观察可视化的绿色荧光信号,可迅速判定转染后的细胞中重组病毒粒子产生的情况,收集转染后的细胞培养上清,将其感染BmN细胞,对感染4 d后的细胞总蛋白进行Western blotting分析,结果表明能杂交到一条36 kDa大小的特异蛋白,表明NS1蛋白成功获得了表达,进而为深入研究ns1基因的功能奠定了基础。  相似文献   

10.
使用同源重组方法,在昆虫细胞内将多角体启动子驱动的EGFP表达盒插入杆状病毒穿梭载体Bacmid的p74位相,经5轮空斑纯化获得重组穿梭载体Bacmid-egfp。然后将Bacmid-egfp转化含转座助手质粒的E.coliDH10B,获得受体菌E.coliDH10Bac-egfp,由于Bacmid-egfp保留了完整的转座结构和α互补功能,因此该菌株和原始E.coliDH10Bac一样能有效的利用各种pFastBac系列的载体进行转座并构建出能指示病毒繁殖和目的基因表达的重组病毒。使用红色荧光蛋白DsRed对系统进行了验证,结果表明重组病毒Bac-egfp-DsRed感染的细胞中绿色荧光蛋白和红色荧光蛋白均得到了高效表达。进一步使用该系统在昆虫细胞中高效表达并纯化了IL-6蛋白,为研究和应用该细胞因子提供物质基础,同时也进一步证明所改造的杆状病毒表达系统的可靠性和实用性。  相似文献   

11.
A new polynitro cage compound 2, 4, 6, 8, 10, 12, 13, 14, 15-nonanitro-2, 4, 6, 8, 10, 12, 13, 14, 15-nonaazaheptcyclo [5.5.1.1(3,11).1(5,9)] pentadecane (NNNAHP) was designed in the present work. Its molecular structure was optimized at the B3LYP/6-31 G(d,p) level of density functional theory (DFT) and crystal structure was predicted using the Compass and Dreiding force fields and refined by DFT GGA-RPBE method. The obtained crystal structure of NNNAHP belongs to the P-1 space group and the lattice parameters are a = 9.99 ?, b = 10.78 ?, c = 9.99 ?, α = 90.01°, β = 120.01°, γ = 90.00°, and Z = 2, respectively. Based on the optimized crystal structure, the band gap, density of state, thermodynamic properties, infrared spectrum, strain energy, detonation characteristics, and thermal stability were predicted. Calculation results show that NNNAHP has detonation properties close to those of CL-20 and is a high energy density compound with moderate stability.  相似文献   

12.
13.
The variation with age of the 18 trace element mass fractions and some histological characteristics of intact prostate glands of 50 subjects aged 0–30 years was investigated by instrumental neutron activation analysis, inductively coupled plasma atomic emission spectrometry, and a quantitative morphometric analysis. Mean values ± standard error of the mean (M ± SΕΜ) for the mass fractions (in milligrams per kilogram wet tissue) of these trace elements in pre-puberty were: Al 28.5 ± 9.0, B 0.40 ± 0.11, Ba 1.48 ± 0.44, Br 10.5 ± 1.5, Ca 241 ± 30, Cl 3,203 ± 278, Cu 3.51 ± 0.89, Fe 33.7 ± 4.1, K 2,364 ± 145, Li 0.020 ± 0.004, Mg 153 ± 23, Mn 0.46 ± 0.06, Na 2,286 ± 130, P 1,391 ± 100, S 1,698 ± 132, Si 62 ± 11, Sr 0.38 ± 0.08, and Zn 27.6 ± 2.3. During puberty and postpuberty, when there is a significant increase in circulating androgens, the mean values were: Al 7.2 ± 1.4, B 0.21 ± 0.05, Ba 0.25 ± 0.06, Br 5.8 ± 1.0, Ca 433 ± 81, Cl 2,314 ± 201, Cu 1.77 ± 0.13, Fe 20.9 ± 1.6, K 2,585 ± 118, Li 0.0088 ± 0.0014, Mg 232 ± 27, Mn 0.34 ± 0.04, Na 1,875 ± 107, P 1,403 ± 98, S 1,673 ± 73, Si 22.2 ± 3.1, Sr 0.22 ± 0.03, and Zn 93.3 ± 8.9. Mean values (M ± SΕΜ) of percent volumes (%) of the stroma, epithelium and lumen in the prostate before puberty were 73.4 ± 2.6, 20.4 ± 1.7, and 4.45 ± 0.94, respectively, versus 46.5 ± 2.5, 38.5 ± 1.9, and 14.9 ± 1.2 during puberty and postpuberty. This work’s results confirm that the Zn mass fraction in prostate tissue is an androgen-dependent parameter. For the first time it has been demonstrated that the glandular lumen is a main pool of Ca, Mg, and Zn accumulation and that the stroma is a main pool of Al, B, Ba, Br, Cl, Cu, Fe, Mn, Na, and Si accumulation in the normal human prostate, for the age range 0–30 years. It was concluded that the Ca, Mg, and Zn binds tightly within the prostatic fluid, because the volume of glandular lumen reflects the volume of prostatic fluid.  相似文献   

14.
Summary Concentration of N, P, K, Ca, Mg and S in summer groundnut crop was higher than in kharif while Zn, Fe, Mn and Cu contents were higher in summer crop. Kernel's N, P and Zn; Leaflet's Ca and Mn; Stem's K and Fe; Root's S and Cu and Petiole's Mg contents were highest. Shell's N, P, K, Mg, S, Zn and Cu; Kernel's Ca, Fe and Mn contents were the least. N, P, K, S, Zn and Cu concentrations decreased linearly as the crop grew. Ca, Mg, Fe and Mn concentrations did not display any distinct pattern. Ca concentration was positively correlated with pod yield in both the seasons.  相似文献   

15.
The goal of this article was to establish reference ranges of the concentration of trace elements in human serum and to compare these results with those reported by other authors. We describe the sample preparation and measurement conditions that allow the rapid, precise, and accurate determination of Al, As, B, Be, Cd, Co, Cu, Fe, Li, Mn, Mo, Ni, Rb, Se, Sr, and Zn in human serum samples (n=110) by inductively coupled plasma-mass spectrometry (ICP-MS). Accuracy and precision were determined by analyzing three reconstituted reference serum samples by comparison with other methods and by the standard addition procedure. The advantages of the ICP-MS method include short time of analysis of the elements mentioned, low detection limit, high precision, and high accuracy. Disadventages include a high risk of contamination due to the presence of some of the elements of interest in the environment, the relatively delicate sample handling, and the high cost of the equipment.  相似文献   

16.
The effect of age and gender on major, minor, and trace element contents in the intact rib bone of 80 relatively healthy 15–55-year-old women and men was investigated. Contents or upper limit of contents of 16 chemical elements in the rib bone were determined by inductively coupled plasma atomic emission spectrometry (ICP-AES). Mean values (M?±?SΕΜ) for the mass fraction of Ba, Ca, Cu, Fe, K, Li, Mg, Na, P, S, Sr, and Zn (milligram per kilogram of dry bone) were as follows: 2.54?±?0.16, 171,400?±?4,050, 1.35?±?0.22, 140?±?11, 1,874?±?71, 0.049?±?0.011, 2,139?±?38, 5,378?±?88, 75,140?±?1,660, 1,881?±?51, 291?±?20, and 92.8?±?1.5, respectively. The upper limits of contents of Al, B, Mn, and V were <7.20, <0.65, <0.36, and <0.03, respectively. Statistically significant tendency for the Ca, Mg, and P content to decrease with age was found in the human rib bone, regardless of gender. The mass fraction of Fe in the male rib bone increases with age. It was shown that higher Ca, Mg, Na, P, and Sr mass fractions as well as lower Fe content were typical of female ribs as compared to those in male ribs.  相似文献   

17.
《Ibis》1894,36(3):447-460
  相似文献   

18.
This report attempts to formulate reference ranges of elemental concentrations for 15 trace elements in selected human tissues and body fluids. A set of samples consisting of whole blood, blood serum, urine, milk, liver, and hair were chosen and considered for 15 elements of biological significance: As, Cd, Co, Cr, Cu, F, Fe, I, Hg, Mn, Mo, Ni, Pb, Se, and Zn. The results represent wholly or partially data received from 40 countries of the global regions of Africa, Asia, Europe, North, South, and Central America, Australia, and New Zealand. This survey, even if qualitative, has been useful in demonstrating certain trends of trace-element scenarios around the world. It is of course recognized that both diet and environment exert a strong influence on the distribution pattern of several elements, such as As, Cd, Mn, Pb, Se, and Zn. A limited comparison of the available information on soil status of different countries reflected some interesting associations for elements, such as Mn and Zn. Importantly, this study revealed that only a few countries were in a position to identify a reasonable amount of data on samples requested for this project. Regretably, for a number of countries, any dependable data for even such essential elements as Cu, Fe, and Zn were not available. In view of the nutritional importance of many elements, the time is ripe for concerted efforts by intergovernmental agencies to initiate investigations or commission task forces/projects to generate reliable reference data for selected global regions, which sadly lack data of any kind at present.  相似文献   

19.
Oral cancer is one of the main causes of cancer-related deaths in South-Asian countries. There are very limited treatment options available for oral cancer. Research endeavors focused on discovery and development of novel therapies for oral cancer, is necessary to control the ever rising oral cancer related mortalities. We mined the large pool of compounds from the publicly available compound databases, to identify potential therapeutic compounds for oral cancer. Over 84 million compounds were screened for the possible anti-cancer activity by custom build SVM classifier. The molecular targets of the predicted anti-cancer compounds were mined from reliable sources like experimental bioassays studies associated with the compound, and from protein-compound interaction databases. Therapeutic compounds from DrugBank, and a list of natural anti-cancer compounds derived from literature mining of published studies, were used for building partial least squares regression model. The regression model thus built, was used for the estimation of oral cancer specific weights based on the molecular targets. These weights were used to compute scores for screening the predicted anti-cancer compounds for their potential to treat oral cancer. The list of potential compounds was annotated with corresponding physicochemical properties, cancer specific bioactivity evidences, and literature evidences. In all, 288 compounds with the potential to treat oral cancer were identified in the current study. The majority of the compounds in this list are natural products, which are well-tolerated and have minimal side-effects compared to the synthetic counterparts. Some of the potential therapeutic compounds identified in the current study are resveratrol, nimbolide, lovastatin, bortezomib, vorinostat, berberine, pterostilbene, deguelin, andrographolide, and colchicine.  相似文献   

20.
We report 19 new species records for the faunal list of Coleoptera in New Brunswick, Canada, six of which are new records for the Maritime provinces, and one of which is new Canadian record. We also provide the first recent records for five additional species in New Brunswick. One new species of Stenotrachelidae, Cephaloon ungulare LeConte, is added to the New Brunswick faunal list. Additional records are provided for Cephaloon lepturides Newman, as well the first recent record of Nematoplus collaris LeConte. Two species of Oedemeridae, Asclera puncticollis (Say) and Asclera ruficollis (Say), are newly reported for New Brunswick, and additional locality and bionomic data are provided for Calopus angustus LeConte and Ditylus caeruleus (Randall). The records of Ditylus caerulus are the first recent records for the province. Three species of Meloidae, Epicauta pestifera Werner, Lytta sayi LeConte, and Meloe augustcollis Say are reported the first time for New Brunswick; Epicauta pestifera is newly recorded in Canada. Lacconotus punctatus LeConte and the family Mycteridaeis newly recorded for New Brunswick. The first recent records of Borus unicolor Say (Boridae) are reported from the province. One new species of Pythidae, Pytho siedlitzi Blair, and the first recent records of Pytho niger Kirby are added to the faunal list of New Brunswick. Three species of Pyrochroidae are newly reported for the province, including Pedilus canaliculatus (LeConte) and Pedilus elegans (Hentz), which are new for the Maritime provinces. Five species of Anthicidae and the first recent record of Anthicus cervinus LaFerté-Sénectére are newly reported for New Brunswick. Anthicus melancholicus LaFerté-Sénectère, Sapintus pubescens (LaFerté-Sénectère), Notoxus bifasciatus (LeConte), and Stereopalpus rufipes Casey are new to the Maritime provinces faunal list. Ambyderus granularis (LeConte) is removed from the faunal list of the province. Three species of Aderidae, Vanonus huronicus Casey, Zonantes fasciatus (Melsheimer), and Zonantes pallidusWerner, are newly recorded for New Brunswick; Zonantes fasciatus and Vanonus huronicus are new for the Maritime provinces' faunal list. Collection data, bionomic data, and distribution maps are presented for all these species.  相似文献   

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