Maintenance of homoeostasis in human body is a very important indicator in all cell activities. When exposed to a disease, various immune cells are activated due to the inflammatory response, and particularly T cells play a role in inducing apoptosis of mutated cells such as tumor cells. When the activity of T cells is very low, infection by external invasion is easy, and on the contrary, excessive activation leads to chronic inflammation caused by autoimmune diseases. Many clinical studies related to pulsed magnetic field (PMF) demonstrated its efficacy in reducing pain, improving blood circulation, as well as blood’s acid-base balance. Therefore, our study has tried to investigate the influence of PMF on the regulation of acid-base homeostasis in EL4 T lymphoma cell. In addition, we have tried to explain the role of PMF on immune cell activity by measuring the level of pro-inflammatory cytokine, TNF-α in culture supernatants. EL4 cells were cultured in a DMEM medium supplemented with 10% FBS and 1% penicillin in an incubator at 37 °C and 5% CO2 condition. Our PMF stimulator has the maximum strength of 4700 G at a transition time of 222 μs with pulse intervals of 1 Hz. The homoeostasis in pH was improved as PMF strength increases. Cell viability decreased by 32% after PMF stimulation of 4700 G. It was observed that the concentration of TNF-α, a cytokine related to inflammation, also decreased as the strength of PMF increased. These results suggest that PMF stimulation improves the anti-inflammatory effect, therefore, it is thought to affect the immune system by balancing the activation and suppression of immune cells. For clinical use, our study might suggest non-invasive PMF can be developed as a medical devices modulating immune system, although it is necessary to optimize the PMF conditions such as pulse shape, duration, or repetition rate.
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