Weak A.C. magnetic field effects: changes in cell sodium pump activity following whole animal exposure

A biological system consisting of a cell membrane enzyme (Na+-K+)-ATPase responded to exposure to a weak A.C. magnetic field. Analysis of Na+ pump activity in normal mouse (A/J) tissue--(a) Kidney cortex and diaphragm after 11 days of exposure to a magnetic field of 55-60 gauss, 60Hz showed a significant reduction as did (b) liver tissue but at day 17 the levels had returned to the control values. Neuroblastoma cells (C1300) transplanted to A/J mice also showed a reduction in the (Na+-K+)-ATPase activity but this persisted at day 17.