Ca2+ Channel Modulation by Recombinant Auxiliary β Subunits Expressed in Young Adult Heart Cells

Ca2+ Channel Modulation by Recombinant Auxiliary β Subunits Expressed in Young Adult Heart Cells
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年轻成体心脏细胞中表达的重组辅助 β 亚基对 Ca2+ 通道的调节

DOI:
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发表时间:
2000
期刊:
影响因子:
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通讯作者:
D. T. Yue
D. T. Yue
中科院分区:
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文献类型:
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作者:
Shao;H. Colecraft;C. D. Demaria;Blaise Z. Peterson;R. Zhang;T. Kohout;T. Rogers;D. T. Yue

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Abstract—L-type Ca2+ channels contribute importantly to the normal excitation-contraction coupling of physiological hearts, and to the functional derangement seen in heart failure. Although Ca2+ channel auxiliary β1–4 subunits are among the strongest modulators of channel properties, little is known about their role in regulating channel behavior in actual heart cells. Current understanding draws almost exclusively from heterologous expression of recombinant subunits in model systems, which may differ from cardiocytes. To study β-subunit effects in the cardiac setting, we here used an adenoviral-component gene-delivery strategy to express recombinant β subunits in young adult ventricular myocytes cultured from 4- to 6-week-old rats. The main results were the following. (1) A component system of replication-deficient adenovirus, poly-l-lysine, and expression plasmids encoding β subunits could be optimized to transfect young adult myocytes with 1% to 10% efficiency. (2) A reporter gene strategy based on gre...
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