Static magnetic fields with intensities starting from 6 gauss (6x10(-4) tesla, T) were found to decrease in an intensity-dependent fashion, reaching a plateau at 6 x 10(-3) T, the extent of cell death by apoptosis induced by several agents in different human cell systems. This is not due to a change in the mode of cell death (i.e., to necrosis) or to a delay of the process itself; rather, the presence of magnetic fields allows the indefinite survival and replication of the cells hit by apoptogenic agents. The protective effect was found to be mediated by the ability of the fields to enhance Ca2+ influx from the extracellular medium; accordingly, it was limited to those cell systems where Ca2+ influx was shown to have an antiapoptotic effect. Magnetic fields thus might interfere with human health by altering/restoring the equilibrium between cell death and proliferation; indeed, the rescue of damaged cells may be the mechanism explaining why magnetic fields that are not mutagenic per se are often able to increase mutation and tumor frequencies.

Fanelli, C., Coppola, S., Barone, R., Colussi, C., Gualandi, G., Volpe, P., et al. (1999). Magnetic fields increase cell survival by inhibiting apoptosis via modulation of Ca2+ influx. THE FASEB JOURNAL, 13(1), 95-102.

Magnetic fields increase cell survival by inhibiting apoptosis via modulation of Ca2+ influx

GUALANDI, GIAMPIERO;VOLPE, PIETRO;GHIBELLI, LINA
1999-01

Abstract

Static magnetic fields with intensities starting from 6 gauss (6x10(-4) tesla, T) were found to decrease in an intensity-dependent fashion, reaching a plateau at 6 x 10(-3) T, the extent of cell death by apoptosis induced by several agents in different human cell systems. This is not due to a change in the mode of cell death (i.e., to necrosis) or to a delay of the process itself; rather, the presence of magnetic fields allows the indefinite survival and replication of the cells hit by apoptogenic agents. The protective effect was found to be mediated by the ability of the fields to enhance Ca2+ influx from the extracellular medium; accordingly, it was limited to those cell systems where Ca2+ influx was shown to have an antiapoptotic effect. Magnetic fields thus might interfere with human health by altering/restoring the equilibrium between cell death and proliferation; indeed, the rescue of damaged cells may be the mechanism explaining why magnetic fields that are not mutagenic per se are often able to increase mutation and tumor frequencies.
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore BIO/13
English
Animals; Calcium; Cell Line; Cell Survival; Enzyme Inhibitors; Etoposide; Humans; Ionomycin; Rats; Thapsigargin; Thymus Gland; Topoisomerase II Inhibitors; U937 Cells; Apoptosis; Electromagnetic Fields
Fanelli, C., Coppola, S., Barone, R., Colussi, C., Gualandi, G., Volpe, P., et al. (1999). Magnetic fields increase cell survival by inhibiting apoptosis via modulation of Ca2+ influx. THE FASEB JOURNAL, 13(1), 95-102.
Fanelli, C; Coppola, S; Barone, R; Colussi, C; Gualandi, G; Volpe, P; Ghibelli, L
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2108/170701
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