A model of cellular cardiac-neural coupling that captures the sympathetic control of sinoatrial node excitability in normotensive and hypertensive rats.
A model of cellular cardiac-neural coupling that captures the sympathetic control of sinoatrial node excitability in normotensive and hypertensive rats.
复制标题
细胞心脏-神经耦合模型,捕捉正常血压和高血压大鼠窦房结兴奋性的交感神经控制。
DOI:
10.1016/j.bpj.2011.05.069
复制
发表时间:
2011
影响因子:
3.4
通讯作者:
Tao T
中科院分区:
文献类型:
--
作者:
Tao T
Hypertension is associated with sympathetic hyperactivity. To represent this neural-myocyte coupling, and to elucidate the mechanisms underlying sympathetic control of the cardiac pacemaker, we developed a new (to our knowledge) cellular mathematical model that incorporates signaling information from cell-to-cell communications between the sympathetic varicosity and sinoatrial node (SAN) in both normotensive (WKY) and hypertensive (SHR) rats. Features of the model include 1), a description of pacemaker activity with specific ion-channel functions and Ca2+handling elements; 2), dynamicβ-adrenergic modulation of the excitation of the SAN; 3), representation of ionic activity of sympathetic varicosity with NE release dynamics; and 4), coupling of the varicosity model to the SAN model to simulate presynaptic transmitter release driving postsynaptic excitability. This framework captures neural-myocyte coupling and the modulation of pacemaking by nitric oxide and cyclic GMP. It also reproduces the chronotropic response to brief sympathetic stimulations. Finally, the SHR model quantitatively suggests that the impairment of cyclic GMP regulation at both sides of the sympathetic cleft is crucial for development of the autonomic phenotype observed in hypertension.
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影响因子:
2.7
作者:
Niederer, S. A.;Fink, M.;Smith, N. P.
通讯作者:
Smith, N. P.
DOI:
10.1113/jphysiol.1994.sp020204
发表时间:
1994
期刊:
The Journal of Physiology
影响因子:
--
作者:
F. Maruoka;Y. Nakashima;M. Takano;K. Ono;A. Noma
通讯作者:
A. Noma
影响因子:
5.3
作者:
Meinrenken, CJ;Borst, JGG;Sakmann, B
通讯作者:
Sakmann, B
影响因子:
5.5
作者:
Honjo, H;Boyett, MR;Toyama, J
通讯作者:
Toyama, J
DOI:
--
发表时间:
1999
期刊:
Japanese circulation journal
影响因子:
--
作者:
N. Onuki;H. Takahashi;H. Suzuki;T. Saito;K. Maehara;Y. Maruyama
通讯作者:
Y. Maruyama