【目的】鉴定津巴布韦烟草丛顶病病原复合体组成。【方法】采集津巴布韦烟草丛顶病样品,对其病原复合体进行分子鉴定。【结果】烟草丛顶病毒津巴布韦分离物(tobacco bushy top virus-Zimbabwe,TBTV-Zimbabwe)在基因组RNA核苷酸序列水平...【目的】鉴定津巴布韦烟草丛顶病病原复合体组成。【方法】采集津巴布韦烟草丛顶病样品,对其病原复合体进行分子鉴定。【结果】烟草丛顶病毒津巴布韦分离物(tobacco bushy top virus-Zimbabwe,TBTV-Zimbabwe)在基因组RNA核苷酸序列水平上与幽影病毒属(Umbravirus)其他成员的一致性为47.8%~94.6%,其中与埃塞俄比亚烟草丛顶病毒(Ethiopian tobacco bushy top virus,ETBTV)序列的一致性最高,为94.6%;与中国烟草丛顶病毒(tobacco bushy top virus,TBTV)序列的一致性仅为56.9%。分子系统进化分析表明:该病毒分离物与ETBTV同源性最高,为ETBTV的分离物,与TBTV为不同的病毒种。TBTV-Zimbabwe卫星RNA与ETBTV卫星RNA在基因组全长核苷酸序列水平上的一致性为93.9%,与GenBank数据库中除ETBTV卫星RNA之外的其他序列无同源性。研究还获得了津巴布韦烟草丛顶病病原复合体中马铃薯卷叶病毒(potato leafroll virus,PLRV)外壳蛋白基因部分核苷酸序列。【结论】津巴布韦烟草丛顶病病原复合体包含3种病毒组分,它们分别与埃塞俄比亚烟草丛顶病病原复合体的3种组分在病毒种的分类水平上一致。津巴布韦与中国烟草丛顶病病原物差异较大。展开更多
Objective Spontaneous rupture of hepatocellular carcinoma (HCC) is common in Asia and Africa with unclear mechanism. In our previous study, we found that the deposition of immune complex on vascular wall and vascular...Objective Spontaneous rupture of hepatocellular carcinoma (HCC) is common in Asia and Africa with unclear mechanism. In our previous study, we found that the deposition of immune complex on vascular wall and vascular injury were related to the HCC rupture. In this study, the structure of elastin around the small artery was deeply investigated to confirm our previous study. Methods Immunohistochemical technique and transmission electron microscopy were used to study 23 specimens from ruptured HCC and 30 cases of nonruptured HCC. Results The layer of elastin around the vascular wall was significant thicker in patients with ruptured HCC than that in nonruptured HCC. The proliferation of elastin, abnormal distribution of neutrophil elastase and degradation of collagen fibril were predominantly present in the specimens from ruptured HCC. The phenomenon of electron—dense deposit in the elastic lamina that represented the deposition of immune complex, and the signs of infiltrated neutrophils from bloodstream into the vascular wall that caused the vascular injury, also can be found in ruptured HCC. Since the damaged vessels could become stiff and weak, which would more prone to be splitting and results in hemorrhage and the rupture of HCC, we postulated that the preexisting of immune complex deposition and vascular injury may be relate to the ruptured HCC. Conclusion The vascular injury caused by immune complex deposition might relate to ruptured HCC. Key words hepatocellular carcinoma - rupture - elastin - elastase展开更多
文摘【目的】鉴定津巴布韦烟草丛顶病病原复合体组成。【方法】采集津巴布韦烟草丛顶病样品,对其病原复合体进行分子鉴定。【结果】烟草丛顶病毒津巴布韦分离物(tobacco bushy top virus-Zimbabwe,TBTV-Zimbabwe)在基因组RNA核苷酸序列水平上与幽影病毒属(Umbravirus)其他成员的一致性为47.8%~94.6%,其中与埃塞俄比亚烟草丛顶病毒(Ethiopian tobacco bushy top virus,ETBTV)序列的一致性最高,为94.6%;与中国烟草丛顶病毒(tobacco bushy top virus,TBTV)序列的一致性仅为56.9%。分子系统进化分析表明:该病毒分离物与ETBTV同源性最高,为ETBTV的分离物,与TBTV为不同的病毒种。TBTV-Zimbabwe卫星RNA与ETBTV卫星RNA在基因组全长核苷酸序列水平上的一致性为93.9%,与GenBank数据库中除ETBTV卫星RNA之外的其他序列无同源性。研究还获得了津巴布韦烟草丛顶病病原复合体中马铃薯卷叶病毒(potato leafroll virus,PLRV)外壳蛋白基因部分核苷酸序列。【结论】津巴布韦烟草丛顶病病原复合体包含3种病毒组分,它们分别与埃塞俄比亚烟草丛顶病病原复合体的3种组分在病毒种的分类水平上一致。津巴布韦与中国烟草丛顶病病原物差异较大。
文摘Objective Spontaneous rupture of hepatocellular carcinoma (HCC) is common in Asia and Africa with unclear mechanism. In our previous study, we found that the deposition of immune complex on vascular wall and vascular injury were related to the HCC rupture. In this study, the structure of elastin around the small artery was deeply investigated to confirm our previous study. Methods Immunohistochemical technique and transmission electron microscopy were used to study 23 specimens from ruptured HCC and 30 cases of nonruptured HCC. Results The layer of elastin around the vascular wall was significant thicker in patients with ruptured HCC than that in nonruptured HCC. The proliferation of elastin, abnormal distribution of neutrophil elastase and degradation of collagen fibril were predominantly present in the specimens from ruptured HCC. The phenomenon of electron—dense deposit in the elastic lamina that represented the deposition of immune complex, and the signs of infiltrated neutrophils from bloodstream into the vascular wall that caused the vascular injury, also can be found in ruptured HCC. Since the damaged vessels could become stiff and weak, which would more prone to be splitting and results in hemorrhage and the rupture of HCC, we postulated that the preexisting of immune complex deposition and vascular injury may be relate to the ruptured HCC. Conclusion The vascular injury caused by immune complex deposition might relate to ruptured HCC. Key words hepatocellular carcinoma - rupture - elastin - elastase
