Unknown authors · 1998
This appears to be a medical study about peritoneal dialysis catheters, not EMF research. The study discusses catheter insertion techniques, infection prevention, and patient care guidelines for kidney dialysis patients. This is unrelated to electromagnetic field exposure or health effects.
Unknown authors · 1998
Researchers at the FDA exposed HL60 cancer cells to 60 Hz magnetic fields at 6 microTesla (similar to power line levels) to test whether this EMF exposure increases MYC gene expression. Despite using methods identical to earlier studies that claimed positive effects, they found no increase in MYC expression. This failed replication raises questions about the reproducibility of some EMF biological effects.
Unknown authors · 1998
Researchers studied human bone cancer cells that were genetically modified to express the p53 tumor suppressor protein, which is normally missing in these cells. When exposed to UV radiation, the cells with restored p53 showed dramatically fewer DNA mutations compared to normal cancer cells. This demonstrates that p53 plays a crucial role in preventing genetic damage beyond just DNA repair mechanisms.
Unknown authors · 1998
Researchers studied how parathyroid hormone affects communication between bone-building cells (osteoblasts) and bone marrow cells. They found that parathyroid hormone increases gap junction formation, which allows cells to communicate better through direct connections. This cellular communication process is controlled by calcium levels inside the cells.
Unknown authors · 1998
Researchers tested whether 60-Hz magnetic fields at 0.1 mT could trigger cancer-related gene activity in human immune cells, attempting to replicate previous findings. They found no changes in oncogene transcription rates or levels after exposures ranging from 15 minutes to 2 hours. This study failed to reproduce earlier claims that power-line frequency magnetic fields activate cancer genes.
Unknown authors · 1998
Researchers exposed HL60 cells (a type of human blood cell) to either X-rays or 60 Hz magnetic fields and examined changes in gene expression. While X-ray exposure altered the activity of 18 genes related to cell growth and stress responses, the 60 Hz magnetic fields produced no detectable changes in gene expression. This suggests that power-line frequency magnetic fields may not trigger the same cellular stress responses as ionizing radiation.
Unknown authors · 1998
Researchers studied how interleukin-1 beta (a immune system protein) affects natural killer cell activity in pregnant versus non-pregnant rats. They found that this protein suppressed immune function in non-pregnant rats but had no effect in pregnant rats, suggesting pregnancy blocks certain immune suppression pathways. This reveals how pregnancy changes immune system responses to inflammatory signals.
Unknown authors · 1998
This study appears to be misclassified in the EMF database, as it actually reviews therapeutic cancer vaccines rather than electromagnetic field research. The paper discusses how cancer vaccines work by stimulating immune responses and explores methods to overcome the immunosuppressive environment that tumors create. This represents a database cataloging error rather than EMF-related health research.
Unknown authors · 1998
Researchers exposed lymphoma B cells to low-energy electromagnetic fields and discovered they trigger a complex cellular signaling cascade involving multiple protein kinases. The EMF exposure activated specific enzymes (LYN, SYK, and PLC-gamma2) that control important cellular processes like calcium signaling and membrane function. This demonstrates that even low-level EMF can directly influence fundamental cellular machinery at the molecular level.
Unknown authors · 1998
Researchers tested how electric charges on tiny particles affect their deposition in human lung airways using hollow casts. They found that charged particles deposit 3-6 times more efficiently than uncharged particles, with 20-nm charged particles showing 5.3 times greater deposition. This matters because most particles we breathe carry electric charges, making current lung dose models potentially inaccurate.
Unknown authors · 1998
Scientists exposed B-cell lymphoma cells to low-energy electromagnetic fields and discovered the radiation activates a specific enzyme called Bruton's tyrosine kinase (BTK). This enzyme then triggers a cascade of cellular changes, including increased activity of phospholipase C-γ2, which affects how cells process important signaling molecules. When researchers removed BTK from the cells, electromagnetic field exposure no longer caused these cellular changes.
Unknown authors · 1998
Researchers exposed human blood cells to 60 Hz magnetic fields (the same frequency as power lines) and found the fields enhanced the activity of protein kinase C, a key enzyme involved in cell signaling. The magnetic fields didn't create new biological effects but amplified existing cellular processes that were already activated.
Unknown authors · 1998
University of Washington researchers exposed rats to 1 mT, 60 Hz magnetic fields (power line frequency) for one hour before each water maze training session. While the rats learned to find the platform normally, they swam slower and showed impaired spatial memory during testing, suggesting the magnetic field changed how their brains processed location information.
Unknown authors · 1998
Researchers measured magnetic field exposure and melatonin levels in electric utility workers over three consecutive days. They found that temporally stable 60 Hz magnetic fields (the kind from power lines) were associated with reduced nighttime melatonin production. This matters because melatonin is crucial for sleep, immune function, and protecting against cancer.
Unknown authors · 1998
Researchers attempted to replicate earlier claims that 60 Hz magnetic fields (the frequency of power lines) activate immune cell signaling in laboratory B cells. Using rigorous blinded testing methods, they found no evidence that 1-gauss power line frequency fields affect these cellular processes. This study challenges previous research suggesting power line EMF can trigger biological responses in immune cells.
Unknown authors · 1998
Researchers exposed rats to 60 Hz magnetic fields (the same frequency as household power lines) for one hour before maze training sessions. While the rats could still learn to find a hidden platform, they swam slower and showed impaired spatial memory when tested later. This suggests power frequency magnetic fields may affect brain function and memory formation.
Unknown authors · 1998
German researchers studied 176 children with leukemia and 414 healthy children, measuring magnetic field exposure in their homes over 24 hours. Children exposed to magnetic fields of 0.2 microTesla or higher showed 2.3 times greater odds of developing acute leukemia. This adds to growing evidence linking residential power line EMF exposure to childhood cancer risk.
Unknown authors · 1998
Researchers tested how electric charge affects tiny particle deposition in human lung airways using cast models. They found that charged particles (which most ambient particles are) deposit 2-6 times more efficiently than neutral particles. This discovery means current models underestimate how much harmful material actually reaches deep lung tissue.
Unknown authors · 1998
Researchers exposed 256 male rats to 50 Hz magnetic fields at 5 microTesla for 22 hours daily over 32 weeks, covering about 70% of their lifespan. The study found no significant differences in blood chemistry, organ structure, or brain neurotransmitters between exposed and control animals. This suggests that prolonged exposure to power-line frequency magnetic fields at this intensity may not cause detectable biological changes in rats.
Unknown authors · 1998
Researchers exposed human blood cells to 60 Hz magnetic fields (the same frequency as power lines) and found that while the fields alone didn't activate protein kinase C, they amplified the effects when cells were already stimulated by chemicals. This suggests magnetic fields may enhance biological processes that are already active rather than starting new ones.
Unknown authors · 1998
This 1998 comprehensive review analyzed approximately 100 laboratory studies examining whether power-frequency electromagnetic fields (from power lines and electrical systems) can cause cancer. The analysis found no replicated evidence that these fields have cancer-causing potential, concluding that a causal link between power-frequency EMF and cancer is unlikely.
Unknown authors · 1998
Researchers exposed rats to 60 Hz magnetic fields (the same frequency as power lines) for one hour before water maze training sessions. While the rats could still learn to find a hidden platform, they swam slower and showed impaired spatial memory when tested later. This suggests power line frequency magnetic fields may affect brain function and memory formation.
Unknown authors · 1998
Researchers exposed rat tracheal cells to 50 Hz magnetic fields (100 microTesla) and found they triggered the same cellular stress proteins as ionizing radiation. The magnetic field exposure activated c-jun and c-fos oncoproteins, which are markers of cellular damage and stress response.
Unknown authors · 1998
This 1998 study examined how 60 Hz magnetic fields from power lines affect melatonin production in electric utility workers. Researchers found that workers exposed to temporally stable magnetic fields - those that remain relatively constant over time - had reduced levels of a melatonin metabolite in their urine. This suggests that steady magnetic field exposure may disrupt the body's natural sleep hormone production.
Unknown authors · 1998
Swedish researchers studied 699 women and 9 men with breast cancer who lived within 300 meters of high-voltage power lines between 1960-1985. They found no overall increased breast cancer risk from magnetic field exposure, but discovered a striking 7.4-fold increased risk among younger women with estrogen-positive breast cancer. This suggests magnetic fields may interact with hormonal factors in specific breast cancer subtypes.