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Effects of an electromagnetic field on intracellular calcium oscillations in a cell with external noise |
Duan Wei-Long(段卫龙)a),Yang Lin-Jing(杨林静)b),and Mei Dong-Cheng(梅冬成)a)† |
a Department of Physics, Yunnan University, Kunming 650091, China; b College of Chinese Medicine, Yunnan University of Traditional Chinese Medicine, Kunming 650031, China |
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Abstract Intracellular calcium ion concentration oscillation in a cell subjected to external noise and irradiated by an electromagnetic field is considered. The effects of the intensity $E_{0}$, the polar angle $\theta $ and the frequency $\omega $ of the external electric field on steady-state probability distribution and the mean Ca$^{2 + }$ concentration, respectively, are investigated by a numerical calculation method. The results indicate that (i) variation of $\omega $ cannot affect the intracellular calcium oscillation; (ii) the steady-state probability distribution presents a meaningful modification due to the variations of $E_{0} $ and $\theta $, while variation of $\theta $ does not affect the steady-state probability distribution under the condition of a small $E_0 $, and $E_0 $ cannot affect the steady-state probability distribution either when $\theta = \pi/2$; (iii) the mean Ca$^{2 + }$ concentration increases as $E_0 $ increases when $\theta < \pi / 2$ and, as $\theta $ increases, it first increases and then decreases. However, it does not vary with $E_0 $ increasing when $\theta = \pi/2$, but it increases with $\theta $ increasing when $E_0 $ is small.
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Received: 06 September 2010
Revised: 28 September 2010
Accepted manuscript online:
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PACS:
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05.40.-a
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(Fluctuation phenomena, random processes, noise, and Brownian motion)
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87.50.-a
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(Effects of electromagnetic and acoustic fields on biological systems)
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Fund: Project supported by the National Natural Science Foundation of China (Grant No. 10865006) and the Science Foundation of Yunnan University, China (Grant No. 2009A001Z). |
Cite this article:
Duan Wei-Long(段卫龙), Yang Lin-Jing(杨林静), and Mei Dong-Cheng(梅冬成) Effects of an electromagnetic field on intracellular calcium oscillations in a cell with external noise 2011 Chin. Phys. B 20 030503
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