极低频电磁场对纤毛虫游泳行为的影响。

Influence of extremely low frequency electromagnetic fields on the swimming behavior of ciliates.

作者信息

Hemmersbach R, Becker E, Stockem W

机构信息

Institute of Aerospace Medicine, DLR (German Aerospace Research Establishment), Köln.

出版信息

Bioelectromagnetics. 1997;18(7):491-8. doi: 10.1002/(sici)1521-186x(1997)18:7<491::aid-bem4>3.0.co;2-y.

DOI:10.1002/(sici)1521-186x(1997)18:7<491::aid-bem4>3.0.co;2-y

PMID:9338630

Abstract

Different species of ciliates (Paramecium biaurelia, Loxodes striatus, Tetrahymena thermophila) have been taken as model systems to study the effects of extremely low-frequency electromagnetic fields (50 Hz, 0.5-2.0 mT) on the cellular level. A dose-dependent increase in the mean swimming velocity and a decrease in the linearity of cell tracks were observed in all wild-type cells. In contrast, field-exposure did not increase the number of directional turns of the Paramecium tetraurelia pawn mutant (d4-500r), which is characterized by defective Ca2+-channels. The described changes indicate a direct effect of low frequency electromagnetic fields on the transport mechanisms of the cell membrane for ions controlling the motile activity of cilia.

摘要

不同种类的纤毛虫（双小核草履虫、条纹斜管虫、嗜热四膜虫）已被用作模型系统，以研究极低频电磁场（50赫兹，0.5 - 2.0毫特斯拉）在细胞水平上的影响。在所有野生型细胞中均观察到平均游动速度呈剂量依赖性增加以及细胞轨迹线性度下降。相比之下，暴露于该电磁场并未增加以Ca2 +通道缺陷为特征的四膜虫pawn突变体（d4 - 500r）的转向次数。所描述的这些变化表明低频电磁场对细胞膜离子转运机制有直接影响，而该机制控制着纤毛的运动活性。