Department of Interdisciplinary Medicine, University of Bari "Aldo Moro", 70124 Bari, Italy.
Nephrology, Dialysis and Transplantation Unit, Department of Precision and Regenerative Medicine and Ionian Area (DIMEPRE-J), University of Bari, Piazza G. Cesare 11, 70124 Bari, Italy.
Int J Mol Sci. 2023 Nov 23;24(23):16631. doi: 10.3390/ijms242316631.
Pulsed electromagnetic fields (PEMF) are employed as a non-invasive medicinal therapy, especially in the orthopedic field to stimulate bone regeneration. However, the effect of PEMF on skeletal muscle cells (SkMC) has been understudied. Here, we studied the potentiality of 1.5 mT PEMF to stimulate early regeneration of human SkMC. We showed that human SkMC stimulated with 1.5 mT PEMF for four hours repeated for two days can stimulate cell proliferation without inducing cell apoptosis or significant impairment of the metabolic activity. Interestingly, when we simulated physical damage of the muscle tissue by a scratch, we found that the same PEMF treatment can speed up the regenerative process, inducing a more complete cell migration to close the scratch and wound healing. Moreover, we investigated the molecular pattern induced by PEMF among 26 stress-related cell proteins. We found that the expression of 10 proteins increased after two consecutive days of PEMF stimulation for 4 h, and most of them were involved in response processes to oxidative stress. Among these proteins, we found that heat shock protein 70 (HSP70), which can promote muscle recovery, inhibits apoptosis and decreases inflammation in skeletal muscle, together with thioredoxin, paraoxonase, and superoxide dismutase (SOD2), which can also promote skeletal muscle regeneration following injury. Altogether, these data support the possibility of using PEMF to increase SkMC regeneration and, for the first time, suggest a possible molecular mechanism, which consists of sustaining the expression of antioxidant enzymes to control the important inflammatory and oxidative process occurring following muscle damage.
脉冲电磁场(PEMF)被用作一种非侵入性的医学治疗方法,特别是在骨科领域,用于刺激骨再生。然而,PEMF 对骨骼肌细胞(SkMC)的影响尚未得到充分研究。在这里,我们研究了 1.5 mT PEMF 刺激人 SkMC 早期再生的潜力。我们表明,1.5 mT PEMF 刺激 SkMC,每天重复两次,每次 4 小时,可以刺激细胞增殖,而不会诱导细胞凋亡或显著损害代谢活性。有趣的是,当我们通过划痕模拟肌肉组织的物理损伤时,我们发现相同的 PEMF 处理可以加速再生过程,诱导更完全的细胞迁移以封闭划痕和伤口愈合。此外,我们研究了 PEMF 诱导的 26 种应激相关细胞蛋白的分子模式。我们发现,在连续两天每天接受 4 小时 PEMF 刺激后,有 10 种蛋白的表达增加,其中大多数与应对氧化应激的过程有关。在这些蛋白质中,我们发现热休克蛋白 70(HSP70)可以促进肌肉恢复,抑制细胞凋亡并减少骨骼肌炎症,以及硫氧还蛋白、对氧磷酶和超氧化物歧化酶 2(SOD2),它们也可以促进损伤后的骨骼肌再生。总之,这些数据支持使用 PEMF 增加 SkMC 再生的可能性,并且首次提出了一种可能的分子机制,该机制包括维持抗氧化酶的表达,以控制肌肉损伤后发生的重要炎症和氧化过程。