Abstract
The magnetic flux density of MRI for clinical diagnosis has been increasing. However, there remains very little biological data regarding the effect of strong static magnetic fields (SMFs) on human health. To evaluate the biological effects of strong SMFs, we cultured INS-1 cells under exposure to sham and SMF conditions for 1 or 2 h, and analyzed insulin secretion, mRNA expression, cell proliferation and cell number. Exposure to SMF with a high magnetic field gradient for 1 h significantly increased insulin secretion and insulin 1 mRNA expression. Exposure to SMF did not affect cell proliferation and cell number. Our results suggested that MRI systems with a higher magnetic flux density might not cause cell proliferative or functional damages on insulin-secreting cells.
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