Changes in NOTCH1 gene and its regulatory circRNA, hsa_circ_0005986 expression pattern in human gastric adenocarcinoma and human normal fibroblast cell line following the exposure to extremely low frequency magnetic field

This study reveals something remarkable: extremely low frequency magnetic fields appear to discriminate between cancer cells and healthy cells at the molecular level. The magnetic fields decreased gastric cancer cell survival by 18 hours of exposure while actually improving normal cell viability. The mechanism appears linked to NOTCH1 gene expression, which was suppressed in cancer cells but enhanced in normal cells. What makes this particularly intriguing is that these are the same frequencies emitted by power lines and many household appliances, typically at much lower intensities. The study used magnetic field strengths of 0.25 to 2 millitesla, which are significantly higher than typical environmental exposures from power lines (usually measured in microtesla). However, certain occupational settings and medical devices can reach these levels. While this research suggests potential therapeutic applications, it also raises questions about how chronic exposure to lower-level ELF fields might affect cellular processes over time. The science demonstrates that magnetic fields can selectively influence gene expression in ways that depend on cell type and field strength.