Research Papers:
Cell type- and density-dependent effect of 1 T static magnetic field on cell proliferation
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Abstract
Lei Zhang1,2,*, Xinmiao Ji1,*, Xingxing Yang1, Xin Zhang1
1High Magnetic Field Laboratory, Chinese Academy of Sciences, Hefei, Anhui, 230031, P. R. China
2University of Science and Technology of China, Hefei, Anhui, 230036, P. R. China
*These authors have contributed equally to this work
Correspondence to:
Xin Zhang, email: [email protected]
Keywords: static magnetic field, cancer cell, EGFR
Received: September 12, 2016 Accepted: December 13, 2016 Published: January 04, 2017
ABSTRACT
Increasing evidence shows that static magnetic fields (SMFs) can affect cell proliferation but mixed results have been reported. Here we systematically examined the effects of 1 T (Tesla) SMF, which is close to the SMF intensity that patients are exposed to MRI (magnetic resonance imaging) scanners in hospitals, for its effect on 15 different cell lines, including 12 human and 3 rodent cell lines. Our results show that 1 T SMF does not have apparent impact on cell cycle or cell death. However, at higher cell density, it reduced cell numbers in six out of seven solid human cancer cell lines. We found that both cell type and cell density had evident impacts on SMF effects. Moreover, the EGFR-Akt-mTOR pathway, which varies significantly between different cell types and densities, contributes to the differential effects of SMF. In addition, SMF also increases the efficacy of Akt inhibitors on cancer cell growth inhibition. Therefore 1 T SMF affects cell proliferation in a cell type- and cell density-dependent manner, and the inhibition effect of 1 T SMF on multiple cancer cells at higher cell density may indicate its clinical potential in late stage cancer therapy.
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