中国人兽共患病学报
中國人獸共患病學報
중국인수공환병학보
CHINESE JOURNAL OF ZOONOSES
2007年
9期
855-860
,共6页
冯春燕%李擎天%董珂%杨宏亮%胡宝瑜%郭晓奎
馮春燕%李擎天%董珂%楊宏亮%鬍寶瑜%郭曉奎
풍춘연%리경천%동가%양굉량%호보유%곽효규
钩端螺旋体病%LipL21%LipL32%DNA疫苗
鉤耑螺鏇體病%LipL21%LipL32%DNA疫苗
구단라선체병%LipL21%LipL32%DNA역묘
leptospirosis%LipL21%LipL32%DNA vaccine
目的 选取致病性钩端螺旋体(简称钩体)中高度保守,同时是钩体外膜蛋白中含量最多的两个脂蛋白LipL32和LipL21构建成融合基因DNA疫苗pVAX1/LipL21-LipL32,观察在BALB/c小鼠中重组DNA疫苗诱导免疫应答反应的能力.方法采用连接引物PCR构建融合基因LipL21-LipL32,并将其插入真核表达载体构成重组DNA疫苗pVAX1/LipL21-LipL32,脂质体转染人胚肾细胞(HEK293细胞)后Western Blot验证重组DNA疫苗在真核细胞中的表达,并将其肌注BALB/c小鼠,用显微凝集试验(MAT)检测所产生的特异性抗体与问号钩体的凝集效价,用IL-10和TNF-β细胞因子试剂盒检测体液免疫和细胞免疫应答水平.结果 Western Blot分析显示重组DNA疫苗pVAX1/LipL21-LipL32在HEK293细胞中得到表达,小鼠动物实验结果显示重组DNA疫苗能有效地诱导机体的体液免疫和细胞免疫应答.结论成功构建钩体融合基因LipL21-LipL32重组DNA疫苗,所表达的融合蛋白能诱导特异的免疫应答反应,为进一步研究和发展新型的钩体病疫苗提供了实验基础.
目的 選取緻病性鉤耑螺鏇體(簡稱鉤體)中高度保守,同時是鉤體外膜蛋白中含量最多的兩箇脂蛋白LipL32和LipL21構建成融閤基因DNA疫苗pVAX1/LipL21-LipL32,觀察在BALB/c小鼠中重組DNA疫苗誘導免疫應答反應的能力.方法採用連接引物PCR構建融閤基因LipL21-LipL32,併將其插入真覈錶達載體構成重組DNA疫苗pVAX1/LipL21-LipL32,脂質體轉染人胚腎細胞(HEK293細胞)後Western Blot驗證重組DNA疫苗在真覈細胞中的錶達,併將其肌註BALB/c小鼠,用顯微凝集試驗(MAT)檢測所產生的特異性抗體與問號鉤體的凝集效價,用IL-10和TNF-β細胞因子試劑盒檢測體液免疫和細胞免疫應答水平.結果 Western Blot分析顯示重組DNA疫苗pVAX1/LipL21-LipL32在HEK293細胞中得到錶達,小鼠動物實驗結果顯示重組DNA疫苗能有效地誘導機體的體液免疫和細胞免疫應答.結論成功構建鉤體融閤基因LipL21-LipL32重組DNA疫苗,所錶達的融閤蛋白能誘導特異的免疫應答反應,為進一步研究和髮展新型的鉤體病疫苗提供瞭實驗基礎.
목적 선취치병성구단라선체(간칭구체)중고도보수,동시시구체외막단백중함량최다적량개지단백LipL32화LipL21구건성융합기인DNA역묘pVAX1/LipL21-LipL32,관찰재BALB/c소서중중조DNA역묘유도면역응답반응적능력.방법채용련접인물PCR구건융합기인LipL21-LipL32,병장기삽입진핵표체재체구성중조DNA역묘pVAX1/LipL21-LipL32,지질체전염인배신세포(HEK293세포)후Western Blot험증중조DNA역묘재진핵세포중적표체,병장기기주BALB/c소서,용현미응집시험(MAT)검측소산생적특이성항체여문호구체적응집효개,용IL-10화TNF-β세포인자시제합검측체액면역화세포면역응답수평.결과 Western Blot분석현시중조DNA역묘pVAX1/LipL21-LipL32재HEK293세포중득도표체,소서동물실험결과현시중조DNA역묘능유효지유도궤체적체액면역화세포면역응답.결론성공구건구체융합기인LipL21-LipL32중조DNA역묘,소표체적융합단백능유도특이적면역응답반응,위진일보연구화발전신형적구체병역묘제공료실험기출.
Two highly conserved and with abundant quantity of lipoproteins in outer membrane of pathogenic species,but not in saprophytic species of leptospira ,LipL32 and LipL21,were selected to construct the fusion gene DNA vaccine pVAX1/LipL21-LipL32,and its ability to induce immune responses in BALB/c mice inoculated with this recombinant DNA vaccine was investigated in the present study.Expression of the fusion-protein LiPL21-LiPL32 was demonstrated in HEK293 cells following transfection with the fusion gene DNA vaccine and the immune responses induced after intramuscular inoculation with this DNA vaccine in BALB/c mice was then evaluated by microscopic agglutination test (MAT),meanwhile the ELISA assay was used to detect the cytokines induced.It was demonstrated that significant level of specific antibodies agglutinating antigens of Leptospira interrogans could be detected by MAT after DNA vaccine inoculation.The production of cytokines IL-10 and TNF-β in mice inoculated with DNA vaccine pVAX1/LipL21-LipL32 was significantly increased in comparison with that of the group inoculated with pVAX1 alone.These results indicate that the recombinant DNA vaccine pVAX1/LipL21-LipL32 may be of potential value to design and develop new generation of vaccines against leptospirosis.