The distribution of mitochondria during early development of mouse embryos was visualized bymitochondria-specific vital fluorescent dye, rhodamine 123(Rh 123). Mitochondrial clusters wasmarkedly conceotrated to perinu...The distribution of mitochondria during early development of mouse embryos was visualized bymitochondria-specific vital fluorescent dye, rhodamine 123(Rh 123). Mitochondrial clusters wasmarkedly conceotrated to perinuclear area in blastomere of normal 2-ccll embryos. In blastomere ofuncompacted 8-cell embryos, mitochondria were randomly distributed throughout the cytoplasm, butthey were reorganizcd to the cytocortices beneath the apposed surfaces of blastomere duringcompaction. As demonstrated in our study, colchicine (10 μg/ml) produced marked effect onmitochondrial distribution in blastomcre of 2-cell and compacted 8-cell embryos: mitochondriabecame scattered throughout the cytoplasm ofblastomere. It is suggested that the spatial distributionof mitochondria in early mouse embryo are maintained by microtubule.展开更多
A full-length rabbit oviductin cDNA(1909bp) was cloned. It consists of a 5’-UTR of 52bp, an open reading frame (ORF) of 1374bp and a 3’-UTR of 483bp and has more than 80% homology with that of other mammal oviductin...A full-length rabbit oviductin cDNA(1909bp) was cloned. It consists of a 5’-UTR of 52bp, an open reading frame (ORF) of 1374bp and a 3’-UTR of 483bp and has more than 80% homology with that of other mammal oviductins. N-terminal peptide (NTP) (384 residues) and C-terminal peptide (CTP) (73 residues) of deduced protein precursor has about 80% and 50% identity with that of other mammals respectively. Fusion proteins GST-NTP 368(1R-368N)and GST-CTP73 (369F-441A) were expressed and purified. NH2-terminal of CTP sequencing reveals that the purified protein is consistent with the deduced one. In order to study the function of NTP and CTP the mouse anti-NTP and rabbit anti-CTP antisera were prepared. Tissue-specific (skeleton muscle, oviduct, uterus, ovary, liver, heart and brain) analysis indicated that rabbit oviductin was only found in oviduct. The conditioned medium derived from the rabbit oviduct mucosa epithelial cells has a function of overcoming the early embryonic development block of Kunming mous e cultured in vitro. Anti-CTP antiserum could totally inhibit the early embryo development at 2-cell stage cultured in the conditioned culture medium, but anti-NTP antiserum couldn’t. There was a positive relationship between the ratio of early embryos at development block and the dosage of anti-CTP antiserum added in the conditioned culture medium. These results suggest that oviductin has a function not only on fertilization, but also on the release of early embryonic development block, and the later function domain of rabbit oviductin may be situate in its C-terminal.展开更多
目的研究2种低血清培养基对人胚肺二倍体细胞(2BS株)的培养效果及甲型肝炎病毒(hepatitis A virus,HAV)在低血清培养基中的增殖情况。方法使用低血清培养基A+2%新生牛血清、B+5%新生牛血清和E-MEM培养基+10%新生牛血清培养细胞,显微镜...目的研究2种低血清培养基对人胚肺二倍体细胞(2BS株)的培养效果及甲型肝炎病毒(hepatitis A virus,HAV)在低血清培养基中的增殖情况。方法使用低血清培养基A+2%新生牛血清、B+5%新生牛血清和E-MEM培养基+10%新生牛血清培养细胞,显微镜下观察细胞形态、贴壁情况,细胞计数并绘制生长曲线;优化低血清培养基B的血清浓度;使用5层细胞工厂连续传代培养,放大低血清培养基细胞培养工艺;使用低血清培养基连续进行3次细胞传代后接种HAV,检测病毒滴度。结果使用低血清培养基A+2%新生牛血清、B+5%新生牛血清和E-MEM培养基+10%新生牛血清,细胞生长密度峰值分别为1.55×10^(5)、2.07×10^(5)和1.30×10^(5)个/cm^(2),统计学分析表明,低血清培养基B+5%新生牛血清达到细胞生长密度峰值高于低血清培养基A+2%新生牛血清和E-MEM+10%新生牛血清,差异具有统计学意义(P均<0.05);低血清培养基B+5%新生牛血清同B+3%新生牛血清连续培养3代细胞生长密度差异均无统计学意义(P=0.47、0.07、0.12);使用5层细胞工厂培养细胞,低血清培养基A+2%新生牛血清、B+5%新生牛血清连续培养3代,细胞生长密度均高于E-MEM+10%新生牛血清;低血清培养基B+3%新生牛血清与低血清培养基B+5%新生牛血清的病毒滴度分别为9.50和9.33 lgCCID_(50)/mL,低血清培养基A+2%新生牛血清和E-MEM+10%新生牛血清的病毒滴度分别为8.50和9.00 lgCCID_(50)/mL。结论低血清培养基适用于培养2BS细胞增殖HAV,为低血清培养基在甲肝疫苗生产中的应用奠定了基础。展开更多
基金This work was aupported by the Foundation for Scientific Research of Shandong Province, PRC.
文摘The distribution of mitochondria during early development of mouse embryos was visualized bymitochondria-specific vital fluorescent dye, rhodamine 123(Rh 123). Mitochondrial clusters wasmarkedly conceotrated to perinuclear area in blastomere of normal 2-ccll embryos. In blastomere ofuncompacted 8-cell embryos, mitochondria were randomly distributed throughout the cytoplasm, butthey were reorganizcd to the cytocortices beneath the apposed surfaces of blastomere duringcompaction. As demonstrated in our study, colchicine (10 μg/ml) produced marked effect onmitochondrial distribution in blastomcre of 2-cell and compacted 8-cell embryos: mitochondriabecame scattered throughout the cytoplasm ofblastomere. It is suggested that the spatial distributionof mitochondria in early mouse embryo are maintained by microtubule.
基金Supported by National Natural Science Foundation of China (39730460)National "973" Project (G1999055902)National Labora-
文摘A full-length rabbit oviductin cDNA(1909bp) was cloned. It consists of a 5’-UTR of 52bp, an open reading frame (ORF) of 1374bp and a 3’-UTR of 483bp and has more than 80% homology with that of other mammal oviductins. N-terminal peptide (NTP) (384 residues) and C-terminal peptide (CTP) (73 residues) of deduced protein precursor has about 80% and 50% identity with that of other mammals respectively. Fusion proteins GST-NTP 368(1R-368N)and GST-CTP73 (369F-441A) were expressed and purified. NH2-terminal of CTP sequencing reveals that the purified protein is consistent with the deduced one. In order to study the function of NTP and CTP the mouse anti-NTP and rabbit anti-CTP antisera were prepared. Tissue-specific (skeleton muscle, oviduct, uterus, ovary, liver, heart and brain) analysis indicated that rabbit oviductin was only found in oviduct. The conditioned medium derived from the rabbit oviduct mucosa epithelial cells has a function of overcoming the early embryonic development block of Kunming mous e cultured in vitro. Anti-CTP antiserum could totally inhibit the early embryo development at 2-cell stage cultured in the conditioned culture medium, but anti-NTP antiserum couldn’t. There was a positive relationship between the ratio of early embryos at development block and the dosage of anti-CTP antiserum added in the conditioned culture medium. These results suggest that oviductin has a function not only on fertilization, but also on the release of early embryonic development block, and the later function domain of rabbit oviductin may be situate in its C-terminal.
文摘目的研究2种低血清培养基对人胚肺二倍体细胞(2BS株)的培养效果及甲型肝炎病毒(hepatitis A virus,HAV)在低血清培养基中的增殖情况。方法使用低血清培养基A+2%新生牛血清、B+5%新生牛血清和E-MEM培养基+10%新生牛血清培养细胞,显微镜下观察细胞形态、贴壁情况,细胞计数并绘制生长曲线;优化低血清培养基B的血清浓度;使用5层细胞工厂连续传代培养,放大低血清培养基细胞培养工艺;使用低血清培养基连续进行3次细胞传代后接种HAV,检测病毒滴度。结果使用低血清培养基A+2%新生牛血清、B+5%新生牛血清和E-MEM培养基+10%新生牛血清,细胞生长密度峰值分别为1.55×10^(5)、2.07×10^(5)和1.30×10^(5)个/cm^(2),统计学分析表明,低血清培养基B+5%新生牛血清达到细胞生长密度峰值高于低血清培养基A+2%新生牛血清和E-MEM+10%新生牛血清,差异具有统计学意义(P均<0.05);低血清培养基B+5%新生牛血清同B+3%新生牛血清连续培养3代细胞生长密度差异均无统计学意义(P=0.47、0.07、0.12);使用5层细胞工厂培养细胞,低血清培养基A+2%新生牛血清、B+5%新生牛血清连续培养3代,细胞生长密度均高于E-MEM+10%新生牛血清;低血清培养基B+3%新生牛血清与低血清培养基B+5%新生牛血清的病毒滴度分别为9.50和9.33 lgCCID_(50)/mL,低血清培养基A+2%新生牛血清和E-MEM+10%新生牛血清的病毒滴度分别为8.50和9.00 lgCCID_(50)/mL。结论低血清培养基适用于培养2BS细胞增殖HAV,为低血清培养基在甲肝疫苗生产中的应用奠定了基础。
