Background Mycoplasma pneumoniae is a common pathogen that caused community-acquired pneumonia (CAP). P1 protein served as major adhesion and immunodominant protein in Mycoplasma pneumoniae, but little about P1 gene...Background Mycoplasma pneumoniae is a common pathogen that caused community-acquired pneumonia (CAP). P1 protein served as major adhesion and immunodominant protein in Mycoplasma pneumoniae, but little about P1 gene was learned and the relationship between P1 genotype and macrolide resistance has yet to be explored.展开更多
Objective To establish a method cloning the exon 3 of eck gene from normal tissue and ZR 75 1 cell line (a human breast cancer cell line)and study whether these genes exist mutant. Methods Designed a pair of s...Objective To establish a method cloning the exon 3 of eck gene from normal tissue and ZR 75 1 cell line (a human breast cancer cell line)and study whether these genes exist mutant. Methods Designed a pair of specific primers and amplified the exon 3 of eck gene fragment from the extracted genomic DNA derived from normal epithelial cells from skin tissue and ZR 75 1 cell line respectively by PCR technique. Transformed the E.coil. JM109 with recombinant plamids constructed by inserting the amplified fragments into medium vector pUCm T and sequenced these amplified fragments after primary screening of endonuclease restriction digestion and PCR amplification. Results ① Obtained the genomic DNA of human normal epithelial cells and ZR 75 1 cell line respectively. ② Obtained the amplified fragments of human exon 3 of eck gene through PCR technique. ③ Obtained the cloning vectors of exon 3 of eck gene of human normal epithelial cells and ZR 75 1 cell line respectively. ④ ZR 75 1 cell line exists mutation of nucleotides. Conclusion Successfully established the method of cloning the human exon 3 of eck gene and found some mutations in the detected samples. This study lays a foundation for further studying the function of eck gene in tumorgenesis.展开更多
目的:构建真核表达质粒pVAX1-Der p 1,检测质粒编码的重组蛋白在真核细胞293T中的表达,为进一步的动物实验打下基础。方法:分离屋尘螨总RNA,根据GenBank已公布的Der p 1核酸序列设计引物,PCR扩增Der p 1编码基因,以其全长为目的基因,定...目的:构建真核表达质粒pVAX1-Der p 1,检测质粒编码的重组蛋白在真核细胞293T中的表达,为进一步的动物实验打下基础。方法:分离屋尘螨总RNA,根据GenBank已公布的Der p 1核酸序列设计引物,PCR扩增Der p 1编码基因,以其全长为目的基因,定向克隆至真核表达载体pVAX1,将其转化大肠杆菌DH5α,筛选含有重组质粒pVAX1-Der p 1的阳性克隆,培养后提取质粒并对其进行双酶切鉴定和序列测定及分析;应用Lipo-fectamine 2000脂质体转染剂,重组基因pVAX1-Der p 1和空质粒pVAX1分别转染真核细胞293T,采用细胞免疫荧光方法,以抗Der p 1特异性抗体检测质粒编码的重组蛋白在293T细胞中的表达情况。结果:获取的Der p 1基因与Genbank上Der p 1cDNA全长序列完全一致,且构建的表达载体实现了目的蛋白的表达。结论:我国本土屋尘螨Der p 1序列与GenBank已公布的核酸序列完全一致;成功构建含Der p 1全长序列的真核表达质粒pVAX1-Der p 1,其能在真核细胞成功表达重组蛋白。展开更多
文摘Background Mycoplasma pneumoniae is a common pathogen that caused community-acquired pneumonia (CAP). P1 protein served as major adhesion and immunodominant protein in Mycoplasma pneumoniae, but little about P1 gene was learned and the relationship between P1 genotype and macrolide resistance has yet to be explored.
文摘Objective To establish a method cloning the exon 3 of eck gene from normal tissue and ZR 75 1 cell line (a human breast cancer cell line)and study whether these genes exist mutant. Methods Designed a pair of specific primers and amplified the exon 3 of eck gene fragment from the extracted genomic DNA derived from normal epithelial cells from skin tissue and ZR 75 1 cell line respectively by PCR technique. Transformed the E.coil. JM109 with recombinant plamids constructed by inserting the amplified fragments into medium vector pUCm T and sequenced these amplified fragments after primary screening of endonuclease restriction digestion and PCR amplification. Results ① Obtained the genomic DNA of human normal epithelial cells and ZR 75 1 cell line respectively. ② Obtained the amplified fragments of human exon 3 of eck gene through PCR technique. ③ Obtained the cloning vectors of exon 3 of eck gene of human normal epithelial cells and ZR 75 1 cell line respectively. ④ ZR 75 1 cell line exists mutation of nucleotides. Conclusion Successfully established the method of cloning the human exon 3 of eck gene and found some mutations in the detected samples. This study lays a foundation for further studying the function of eck gene in tumorgenesis.
文摘目的:构建真核表达质粒pVAX1-Der p 1,检测质粒编码的重组蛋白在真核细胞293T中的表达,为进一步的动物实验打下基础。方法:分离屋尘螨总RNA,根据GenBank已公布的Der p 1核酸序列设计引物,PCR扩增Der p 1编码基因,以其全长为目的基因,定向克隆至真核表达载体pVAX1,将其转化大肠杆菌DH5α,筛选含有重组质粒pVAX1-Der p 1的阳性克隆,培养后提取质粒并对其进行双酶切鉴定和序列测定及分析;应用Lipo-fectamine 2000脂质体转染剂,重组基因pVAX1-Der p 1和空质粒pVAX1分别转染真核细胞293T,采用细胞免疫荧光方法,以抗Der p 1特异性抗体检测质粒编码的重组蛋白在293T细胞中的表达情况。结果:获取的Der p 1基因与Genbank上Der p 1cDNA全长序列完全一致,且构建的表达载体实现了目的蛋白的表达。结论:我国本土屋尘螨Der p 1序列与GenBank已公布的核酸序列完全一致;成功构建含Der p 1全长序列的真核表达质粒pVAX1-Der p 1,其能在真核细胞成功表达重组蛋白。