Aim: This study was designed to investigate the effect of busulfan treatment on the proliferation of chicken primordialgerm cells (PGCs) in vivo, focusing on the preferential settlement of PGCs onto the germinal ridge...Aim: This study was designed to investigate the effect of busulfan treatment on the proliferation of chicken primordialgerm cells (PGCs) in vivo, focusing on the preferential settlement of PGCs onto the germinal ridges of chicken em-bryos. Methods: Busulfan (250 ng/egg) was injected into the egg white of freshly oviposited fertilized eggs, whichwere then incubated. Embryonic development and viability were examined, and exogenous PGCs collected from embry-onic blood vessels were injected into the germinal crescent region of recipient embryos. The number of PGCs residedonto germinal ridges of the right and left sides were compared. Results: Busulfan had a slight harmful effect on theembryo viability and the PGCs proliferation. The number of PGCs resided onto the left side of germinal ridges wasslightly higher as compared with the right side. Conclusion: Busulfan suppressed the viability of embryos and the pro-liferation of endogenous PGCs in the recipient embryos. However, the number of exogenous PGCs proliferated washigher in embryos treated with busulfan than those without busulfan. Data also suggest the possibility of a preferentialresidence of PGCs toward the left side of the germinal crescent region as compared with the fight, which may be due toa more advanced functional development of the left gonad than the right. (Asian J Androl 1999 Dec; 1: 187-190)展开更多
In the present study, the effect of manganese(Mn) on antioxidant status and the expression of the manganese superoxide dismutase(MnSOD) gene in cultured primary myocardial cells collected from the chick embryos wa...In the present study, the effect of manganese(Mn) on antioxidant status and the expression of the manganese superoxide dismutase(MnSOD) gene in cultured primary myocardial cells collected from the chick embryos was investigated. The hypothesis that Mn supplementation would enhance the expression of MnSOD in cultured primary myocardial cells of chick embryos was tested. Eggs collected from Mn-depleted Arbor Acres laying breeder hens were incubated for 10 days and then myocardial cells were isolated and cultivated for 8 days. The embryonic myocardial cells on day 6 were treated with Mn in the cell culture medium at different time points when the proportion of cells showing spontaneous contraction was over 95% after the 3-day primary culture. A completely randomized design involving a 3 Mn levels(0, 0.5 and 1.0 mmol L^(-1))×3 incubation time points(12, 24 and 48 h) factorial arrangement of treatments(n=6) was used in the current experiment. The results showed that MnSOD activity and m RNA expression level were induced by Mn and increased with incubation time, which supported the hypothesis that Mn would enhance the expression of the MnSOD gene, and thus might protect myocardial cells from oxidative stress during the chick embryonic development.展开更多
[Objective] This study was to investigate the effect of forsythiaside A added in chick embryo kidney cells (CEKs), on the changes in expression of interferon α(IFN-α) and mRNA expression level of correlated factors ...[Objective] This study was to investigate the effect of forsythiaside A added in chick embryo kidney cells (CEKs), on the changes in expression of interferon α(IFN-α) and mRNA expression level of correlated factors in JAK-STAT pathway. [Methods] Three levels of forsythiaside (100, 200, 400 μg/ml) were adopted to treat the experimental materials, then the expression levels of IFN-α and correlated factors in JAK-STAT pathway were detected by real-time RT-PCR at the transcriptional level (mRNA) and by Western blot at the translation level(IFN-α protein). [Result] Compared with the control group (untreated group), Application of forsythiaside A not only significantly increased the expression of IFN-α in treated CEKs (P<0.05) , but also up-regulated the expression of STAT1, JAK1, IFNAR1, IFNAR2, IRF1 and IRF7, the correlated factors in JAK-STAT pathway. [Conclusion] Forsythiaside A induced the expression of IFN-α in CEKs, and can positively regulate the JAK-STAT signaling pathway significantly.展开更多
目的研究重组腺病毒三突变型低氧诱导因子-1α(Ad-HIF-1α-Ala564-Ala402-Ala803,简称Ad-HIF-1α-564/402/803)对体外血管新生的影响。方法将前期构建的Ad-HIF-1α-564/402/803在HEK293A细胞中进行扩增,用氯化铯浓度梯度离心法进行腺病...目的研究重组腺病毒三突变型低氧诱导因子-1α(Ad-HIF-1α-Ala564-Ala402-Ala803,简称Ad-HIF-1α-564/402/803)对体外血管新生的影响。方法将前期构建的Ad-HIF-1α-564/402/803在HEK293A细胞中进行扩增,用氯化铯浓度梯度离心法进行腺病毒纯化,终点稀释法测定病毒滴度,提取病毒DNA,进行PCR及PCR产物测序鉴定三突变型HIF-1α基因;X-Gal染色法测定重组腺病毒转染效率;Ad-HIF-1α-564/402/803、Ad-HIF-1αnature、Ad-Null分别转染hMVECs后,观察hMVECs在Matrigel上毛细血管管腔样结构的形成情况;Ad-HIF-1α-564/402/803、Ad-HIF-1αnature、Ad-Null和PBS分别转染鸡胚绒毛尿囊膜(CAM)模型后,利用Image Pro Plus6.0软件收集数据并计算各组CAM血管面积比。结果经PCR及基因测序鉴定,扩增纯化后的腺病毒所携带的目的基因信息无丢失或变异,病毒滴度达1011~1012PFU/ml;X-gal染色显示MOI为100pfu/cell时,转染效率趋于稳定;Ad-HIF-1α-564/402/803转染hMVECs后Matrigel上的管腔数目显著多于Ad-HIF-1α-nature组、Ad-Null及对照组;基因转染CAM72h后,Ad-HIF-1α-564/402/803组CAM上微小血管数目较Ad-HIF-1α-nature组、Ad-Null组、PBS组明显增多;Ad-HIF-1α-564/402/803组血管面积比与Ad-HIF-1α-nature组、Ad-Null组、PBS组相比,差异有统计学意义(P值分别为0.01、0.000、0.000)。结论Ad-HIF-1α-564/402/803能明显促进hMVECs毛细血管管腔样结构的形成,同时可以促进CAM模型上微小血管新生,证实了Ad-HIF-1α-564/402/803在常氧情况下对血管新生有一定的促进作用。展开更多
文摘Aim: This study was designed to investigate the effect of busulfan treatment on the proliferation of chicken primordialgerm cells (PGCs) in vivo, focusing on the preferential settlement of PGCs onto the germinal ridges of chicken em-bryos. Methods: Busulfan (250 ng/egg) was injected into the egg white of freshly oviposited fertilized eggs, whichwere then incubated. Embryonic development and viability were examined, and exogenous PGCs collected from embry-onic blood vessels were injected into the germinal crescent region of recipient embryos. The number of PGCs residedonto germinal ridges of the right and left sides were compared. Results: Busulfan had a slight harmful effect on theembryo viability and the PGCs proliferation. The number of PGCs resided onto the left side of germinal ridges wasslightly higher as compared with the right side. Conclusion: Busulfan suppressed the viability of embryos and the pro-liferation of endogenous PGCs in the recipient embryos. However, the number of exogenous PGCs proliferated washigher in embryos treated with busulfan than those without busulfan. Data also suggest the possibility of a preferentialresidence of PGCs toward the left side of the germinal crescent region as compared with the fight, which may be due toa more advanced functional development of the left gonad than the right. (Asian J Androl 1999 Dec; 1: 187-190)
基金supported by the Key International Cooperation Program of the National Natural Science Foundation of China (31110103916)the National Natural Science Foundation of China (31272465)+1 种基金the Agricultural Science and Technology Innovation Program,China (ASTIP-IAS08)the China Agriculture Research System (CARS-42)
文摘In the present study, the effect of manganese(Mn) on antioxidant status and the expression of the manganese superoxide dismutase(MnSOD) gene in cultured primary myocardial cells collected from the chick embryos was investigated. The hypothesis that Mn supplementation would enhance the expression of MnSOD in cultured primary myocardial cells of chick embryos was tested. Eggs collected from Mn-depleted Arbor Acres laying breeder hens were incubated for 10 days and then myocardial cells were isolated and cultivated for 8 days. The embryonic myocardial cells on day 6 were treated with Mn in the cell culture medium at different time points when the proportion of cells showing spontaneous contraction was over 95% after the 3-day primary culture. A completely randomized design involving a 3 Mn levels(0, 0.5 and 1.0 mmol L^(-1))×3 incubation time points(12, 24 and 48 h) factorial arrangement of treatments(n=6) was used in the current experiment. The results showed that MnSOD activity and m RNA expression level were induced by Mn and increased with incubation time, which supported the hypothesis that Mn would enhance the expression of the MnSOD gene, and thus might protect myocardial cells from oxidative stress during the chick embryonic development.
文摘[Objective] This study was to investigate the effect of forsythiaside A added in chick embryo kidney cells (CEKs), on the changes in expression of interferon α(IFN-α) and mRNA expression level of correlated factors in JAK-STAT pathway. [Methods] Three levels of forsythiaside (100, 200, 400 μg/ml) were adopted to treat the experimental materials, then the expression levels of IFN-α and correlated factors in JAK-STAT pathway were detected by real-time RT-PCR at the transcriptional level (mRNA) and by Western blot at the translation level(IFN-α protein). [Result] Compared with the control group (untreated group), Application of forsythiaside A not only significantly increased the expression of IFN-α in treated CEKs (P<0.05) , but also up-regulated the expression of STAT1, JAK1, IFNAR1, IFNAR2, IRF1 and IRF7, the correlated factors in JAK-STAT pathway. [Conclusion] Forsythiaside A induced the expression of IFN-α in CEKs, and can positively regulate the JAK-STAT signaling pathway significantly.
文摘目的研究重组腺病毒三突变型低氧诱导因子-1α(Ad-HIF-1α-Ala564-Ala402-Ala803,简称Ad-HIF-1α-564/402/803)对体外血管新生的影响。方法将前期构建的Ad-HIF-1α-564/402/803在HEK293A细胞中进行扩增,用氯化铯浓度梯度离心法进行腺病毒纯化,终点稀释法测定病毒滴度,提取病毒DNA,进行PCR及PCR产物测序鉴定三突变型HIF-1α基因;X-Gal染色法测定重组腺病毒转染效率;Ad-HIF-1α-564/402/803、Ad-HIF-1αnature、Ad-Null分别转染hMVECs后,观察hMVECs在Matrigel上毛细血管管腔样结构的形成情况;Ad-HIF-1α-564/402/803、Ad-HIF-1αnature、Ad-Null和PBS分别转染鸡胚绒毛尿囊膜(CAM)模型后,利用Image Pro Plus6.0软件收集数据并计算各组CAM血管面积比。结果经PCR及基因测序鉴定,扩增纯化后的腺病毒所携带的目的基因信息无丢失或变异,病毒滴度达1011~1012PFU/ml;X-gal染色显示MOI为100pfu/cell时,转染效率趋于稳定;Ad-HIF-1α-564/402/803转染hMVECs后Matrigel上的管腔数目显著多于Ad-HIF-1α-nature组、Ad-Null及对照组;基因转染CAM72h后,Ad-HIF-1α-564/402/803组CAM上微小血管数目较Ad-HIF-1α-nature组、Ad-Null组、PBS组明显增多;Ad-HIF-1α-564/402/803组血管面积比与Ad-HIF-1α-nature组、Ad-Null组、PBS组相比,差异有统计学意义(P值分别为0.01、0.000、0.000)。结论Ad-HIF-1α-564/402/803能明显促进hMVECs毛细血管管腔样结构的形成,同时可以促进CAM模型上微小血管新生,证实了Ad-HIF-1α-564/402/803在常氧情况下对血管新生有一定的促进作用。