相关实验视频
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Isolation of Atrial Myocytes from Adult Mice
Published on: July 25, 2019
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在大鼠中,Na+通道异型的定位在心房结节和心房结节
Shin Yoo1, Halina Dobrzynski, Vadim V Fedorov
1Cardiovascular Research Group, School of Medicine, University of Manchester, Core Technology Facility, 46 Grafton St, Manchester M13 9NT, United Kingdom.
Circulation
|September 13, 2006
概括
这项研究揭示了心节 (AVN) 中明显的通道 (Na(V)) 表达模式,表明多种电生理细胞类型. 损坏的AV导电可能源于AVN输入或输出中的问题,而不是核心AVN结构.
科学领域:
- 心脏电生理学 心脏电生理学
- 分子心脏病学分子心脏病学
- 离子通道生物学 离子通道生物学
背景情况:
- 房节点 (AVN) 呈现功能异质性,但其细胞基础和与3D结构的关系尚不清楚.
- 了解AVN细胞组成对于解释其电活动和导电特性至关重要.
研究的目的:
- 为了研究大鼠AVN中通道Na(V) 1.5和其他Na+通道异型的表达.
- 为了将Na+通道分布与AVN的不同细胞类型和结构区域相关联.
主要方法:
- 使用马森三色染色和免疫标记用于标记蛋白 (连接素,desmoplakin,ANP,HCN4) 的老鼠AVN识别.
- 使用异形特异性Na+通道抗体进行免疫组织化学,以确定Na(V) 1.1,Na(V) 1.2,Na(V) 1.3,Na(V) 1.5和Na(V) 1.6的分布.
主要成果:
- 在心房/心室肌动脉和左束分支中,Na(V) 1.5标签突出,但在开放节点和穿透的AV束中缺席.
- 在神经纤维和细胞体中检测到Na(V)1.3,在透和常见的AV捆中丰富,但在其他地方不那么丰富.
- Na(V) 1.1的分布与Na(V) 1.5的分布相似,Na(V) 1.2和Na(V) 1.6没有被检测到.
结论:
- 这些发现提供了AV结内的多种电生理细胞类型的分子证据.
- 由于Na(V) 1.5功能障碍导致的AV导电损坏可能涉及AVN输入 (下节点延伸,过渡区) 或输出 (捆绑分支),而不是中央AVN.
相关概念视频
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Compared to the gated ion channels, the non-gated channels, also known as leakage or passive channels, have no gating mechanism.
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Compared to the gated ion channels, the non-gated channels, also known as leakage or passive channels, have no gating mechanism.
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