* Mechanism for action of electromagnetic fields on cells (3/11/02)

Tramès per Klaus Rudolph (Citizens' Initiative Omega)

Mechanism for action of electromagnetic fields on cells

Panagopoulos D, Karabarbounis A, Margaritis L.
Department of Cell Biology and Biophysics, Faculty of Biology,
University of Athens, Panepistimiopolis, GR-15784, Athens, Greece

A biophysical model for the action of oscillating electric fields on cells, presented by us before [Biochem. Biophys. Res. Commun.  272(3) (2000) 634-640], is extended now to include oscillating magnetic fields as well, extended to include the most active biological  conditions, and also to explain why pulsed electromagnetic fields can be more active biologically than continuous ones.

According to  the present theory, the low frequency fields are the most bioactive ones. The basic mechanism is the forced-vibration of  all the free ions on the surface of a cell's plasma membrane, caused by an external oscillating field.

We have shown that this coherent vibration of electric charge is able to irregularly gate electrosensitive channels on the plasma  membrane and thus cause disruption of the cell's electrochemical balance and function [Biochem. Biophys. Res. Commun. 272(3) (2000)  634-640]. It seems that this simple idea can be easily extended now and looks very likely to be able to give a realistic basis for the  explanation of a wide range of electromagnetic field bioeffects.

Source: Biochem Biophys Res Commun 2002 Oct 18;298(1):95

and

A mechanism for action of oscillating electric fields on cells

Panagopoulos DJ, Messini N, Karabarbounis A, Philippetis AL, Margaritis
LH. Department of Cell Biology and Biophysics, Athens University, Greece.

The biological effects of electromagnetic fields have seriously concerned the scientific community and the public as well in the past decades as more and more evidence has accumulated about the hazardous consequences of so-called "electromagnetic pollution."

This theoretical model is based on the simple hypothesis that an oscillating external electric field will exert an oscillating force  to each of the free ions that exist on both sides of all plasma membranes and that can move across the membranes through transmembrane  proteins. This external oscillating force will cause a forced vibration of each free ion.

When the amplitude of the ions' forced  vibration transcends some critical value, the oscillating ions can give a false signal for opening or closing channels that are  voltage gated (or even mechanically gated), in this way disordering the electrochemical balance of the plasma membrane and consequently the whole cell function.

Source: Biochem Biophys Res Commun 2000 Jun 16;272(3):634-40

Informant: Reinhard Rückemann

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