Objective： Leber＇s hereditary optic neuropathy （LHON） is a maternally inherited degeneration of the optic nerve caused by point mutations of mitochondrial DNA （mtDNA）. Many unsolved questions regarding the penet...Objective： Leber＇s hereditary optic neuropathy （LHON） is a maternally inherited degeneration of the optic nerve caused by point mutations of mitochondrial DNA （mtDNA）. Many unsolved questions regarding the penetrance and pathophysiological mechanism of LHON demand efficient and reliable mutation testing. This study aims to develop a minor groove binder （MGB） probe assay for rapid detection of mtDNA11778 mutation and heteroplasmy in Chinese LHON patients by real-time polymerase chain reaction （PCR）. Methods： Forty-eight patients suspected of having LHON and their maternal relatives underwent a molecular genetic evaluation, with 20 normal individuals as a control group at the same time. A real-time PCR involving two MGB probes was used to detect the mtDNA 1 1778 mutation and heteroplasmy. A linear standard curve was obtained by pUCmLHONG and pUCmLHONA clones. Results： All 48 LHON patients and their maternal relatives were positive for rntDNA11778 mutation in our assay, 27 heteroplasmic and 21 homoplasmic. Eighteen cases did not show an occurrence of the disease, while 9 developed the disease among the 27 heteroplasmic mutation cases. Eleven did not show an occurrence of the disease, while 10 cases developed the disease among 21 homoplasmic mutation cases. There was a significant difference in the incidence between the heteroplasmic and the homoplasmic mutation types. The time needed for running a real-time PCR assay was only 80 min. Conclusion： This real-time PCR assay is a rapid, reliable method for mtDNA mutation detection as well as heteroplasmy quantification. Detecting this ratio is very important for predicting phenotypic expression of unaffected carriers.展开更多
《HON》原英文名《Heroes of Newerth》,是由美国S2 Games公司研发的一款MOBA网游。这款游戏是世界上第一款MOBA独立客户端网游,S2 Games多年前联系到Dota地图作者lcefrog寻求他同意来制作产品。他没有意见,认为竞争和长期效应是好的,只...《HON》原英文名《Heroes of Newerth》,是由美国S2 Games公司研发的一款MOBA网游。这款游戏是世界上第一款MOBA独立客户端网游,S2 Games多年前联系到Dota地图作者lcefrog寻求他同意来制作产品。他没有意见,认为竞争和长期效应是好的,只要Dot A有人关注,他就开发下去。2008年7月左右,社区网站出现消息。目前国服已经上线,并有了参与国际比赛的队伍WE。展开更多
本文使用带有解析梯度的MCSCF ab initio方法和3-21G基组,求得了HNO和HON的平衡几何构型及它们的重排反应的过渡态;并用数值方法求得了反应体系的力常数矩阵;从过渡态力常数矩阵的唯一负本征值相应的本征向量出发,求出了反应的内禀反应...本文使用带有解析梯度的MCSCF ab initio方法和3-21G基组,求得了HNO和HON的平衡几何构型及它们的重排反应的过渡态;并用数值方法求得了反应体系的力常数矩阵;从过渡态力常数矩阵的唯一负本征值相应的本征向量出发,求出了反应的内禀反应坐标(IRC)。经这个反应途径的振动分析和曲率计算表明:沿反应途径,N=O伸缩振动是绝热的,而H原子的伸缩振动则是一个动态自由度,IRC的曲率主要由这个正则坐标组成;沿反应途径IRC的曲率有2个尖锐的峰值,表明在这2个点附近,将会有动态学的效应发生。展开更多
基金the "Qianjiang Research Talent" grantfrom the Science and Technology Department of Zhejiang Province, China
文摘Objective： Leber＇s hereditary optic neuropathy （LHON） is a maternally inherited degeneration of the optic nerve caused by point mutations of mitochondrial DNA （mtDNA）. Many unsolved questions regarding the penetrance and pathophysiological mechanism of LHON demand efficient and reliable mutation testing. This study aims to develop a minor groove binder （MGB） probe assay for rapid detection of mtDNA11778 mutation and heteroplasmy in Chinese LHON patients by real-time polymerase chain reaction （PCR）. Methods： Forty-eight patients suspected of having LHON and their maternal relatives underwent a molecular genetic evaluation, with 20 normal individuals as a control group at the same time. A real-time PCR involving two MGB probes was used to detect the mtDNA 1 1778 mutation and heteroplasmy. A linear standard curve was obtained by pUCmLHONG and pUCmLHONA clones. Results： All 48 LHON patients and their maternal relatives were positive for rntDNA11778 mutation in our assay, 27 heteroplasmic and 21 homoplasmic. Eighteen cases did not show an occurrence of the disease, while 9 developed the disease among the 27 heteroplasmic mutation cases. Eleven did not show an occurrence of the disease, while 10 cases developed the disease among 21 homoplasmic mutation cases. There was a significant difference in the incidence between the heteroplasmic and the homoplasmic mutation types. The time needed for running a real-time PCR assay was only 80 min. Conclusion： This real-time PCR assay is a rapid, reliable method for mtDNA mutation detection as well as heteroplasmy quantification. Detecting this ratio is very important for predicting phenotypic expression of unaffected carriers.
文摘本文使用带有解析梯度的MCSCF ab initio方法和3-21G基组,求得了HNO和HON的平衡几何构型及它们的重排反应的过渡态;并用数值方法求得了反应体系的力常数矩阵;从过渡态力常数矩阵的唯一负本征值相应的本征向量出发,求出了反应的内禀反应坐标(IRC)。经这个反应途径的振动分析和曲率计算表明:沿反应途径,N=O伸缩振动是绝热的,而H原子的伸缩振动则是一个动态自由度,IRC的曲率主要由这个正则坐标组成;沿反应途径IRC的曲率有2个尖锐的峰值,表明在这2个点附近,将会有动态学的效应发生。
