Effects of an electromagnetic field on intracellular calcium oscillations in a cell with external noise  

作　　者：段卫龙 杨林静 梅冬成 

机构地区：[1]Department of Physics,Yunnan University [2]College of Chinese Medicine,Yunnan University of Traditional Chinese Medicine

出　　处：《Chinese Physics B》2011年第3期65-73,共9页中国物理B（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant No. 10865006);the Science Foundation of Yunnan University,China (Grant No. 2009A001Z)

摘　　要：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 E0, the polar angle θ and the frequency w of the external electric field on steady-state probability distribution and the mean Ca2＋ concentration, respectively, are investigated by a numerical calculation method. The results indicate that （i） variation of w cannot affect the intracellular calcium oscillation; （ii） the steady-state probability distribution presents a meaningful modification due to the variations of E0 and 0, while variation of 0 does not affect the steady-state probability distribution under the condition of a small E0, and E0 cannot affect the steady-state probability distribution either when θ=π/2; （iii） the mean Ca2＋ concentration increases as E0 increases when θ〈π/2 and, as 0 increases, it first increases and then decreases. However, it does not vary with E0 increasing when θ=π/2, but it increases with 0 increasing when E0 is small.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 E0, the polar angle θ and the frequency w of the external electric field on steady-state probability distribution and the mean Ca2＋ concentration, respectively, are investigated by a numerical calculation method. The results indicate that （i） variation of w cannot affect the intracellular calcium oscillation; （ii） the steady-state probability distribution presents a meaningful modification due to the variations of E0 and 0, while variation of 0 does not affect the steady-state probability distribution under the condition of a small E0, and E0 cannot affect the steady-state probability distribution either when θ=π/2; （iii） the mean Ca2＋ concentration increases as E0 increases when θ〈π/2 and, as 0 increases, it first increases and then decreases. However, it does not vary with E0 increasing when θ=π/2, but it increases with 0 increasing when E0 is small.

关 键 词：fluctuation phenomena interactions of biosystems with radiations 

分 类 号：Q274[生物学—细胞生物学]