Sinusoidal Extremely Low-Frequency Electromagnetic Stimulation (ELF-EMS) Promotes Angiogenesis In Vitro

Area of Science:

• Biomedical Engineering
• Cell Biology
• Regenerative Medicine

Background:

• Angiogenesis, the formation of new blood vessels, is crucial for tissue repair and recovery from ischemic injuries.
• Extremely low-frequency electromagnetic stimulation (ELF-EMS) has shown potential in improving cerebral blood flow and recovery post-stroke.
• Previous research suggests ELF-EMS effects are dependent on endothelial nitric oxide synthase (eNOS).

Purpose of the Study:

• To investigate the effects of ELF-EMS (13.5 mT/10 and 60 Hz) on angiogenic processes in vitro.
• To explore the role of nitric oxide (NO) and calcium in ELF-EMS-induced angiogenesis.
• To assess in vivo angiogenesis using a chicken chorioallantoic membrane (CAM) assay.

Main Methods:

• Human microvascular endothelial cells (HMEC-1) were used to study proliferation, migration, and tube formation.
• Nitric oxide (NO) production and the influence of calcium were measured.
• The chicken chorioallantoic membrane (CAM) assay was employed to evaluate blood vessel formation in ovo.

Main Results:

• ELF-EMS significantly increased HMEC-1 cell proliferation, migration, and tube formation.
• ELF-EMS-induced cell transmigration was mediated by NO, and calcium inhibition reduced NO production.
• Significant enhancement of blood vessel formation was observed in the CAM assay following ELF-EMS exposure.

Conclusions:

• ELF-EMS (13.5 mT/10 and 60 Hz) effectively induces angiogenesis in vitro and in ovo.
• The findings highlight ELF-EMS as a potential therapeutic strategy for conditions involving insufficient blood supply.
• NO plays a critical role in mediating ELF-EMS-induced angiogenic responses.