Recent studies of interactions between the brain and immune system cells, as well as reports of bioeffects from artificial electromagnetic sources too weak to exert thermal effects, suggest that biophysical communication may exist between them not explained by electrochemical action. We report here that a human donor's endogenous electric fields protect his lymphocyte viability in vitro. The endogenous fields of a healthy male donor were introduced into a cell culture via a gold wire for 7 h overnight and the cells' viability compared by trypan blue exclusion, with nonexposed cells cultured similarly. Cells exposed to their donor's endogenous fields remained significantly more viable compared with unexposed cells. However, when cells were exposed to the endogenous fields of a nondonor, viability was no different from that of unexposed controls. We conclude that endogenous electric fields, observed in all living organisms, perform a previously unsuspected but important role in cellular immune system surveillance.
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