Mice rescued from Alzheimer's by mobile phone?
Used for mobile telephony, radio frequency waves would they have beneficial effects on Alzheimer's disease?
Surprising as it may seem, the question is raised by a study conducted on mice by a team of researchers from the University of South Florida (USA), the Medical University of Saitama (Japan) and from Dalian Medical University (China). The work of these scientists, who claim to have no conflict of interest with the telephone industry, is published Wednesday, January 6 in the Journal of Alzheimer's Disease.
"This article reports the first evidence that long-term exposure to an electromagnetic field (EMF) directly associated with the use of a mobile phone (918 MHz, 0.25 W / kg) results in cognitive benefit," write Gary Arendash and his colleagues. The researchers indicate that protective cognitive effects and cognitive performance enhancing effects have been found in both normal and genetically engineered mice to develop Alzheimer-type abnormalities.
In practice, 96 mice, divided into four groups, were used. Exposure of twice an hour per day to RF waves was standardized and lasted seven to nine months: animal cages contained a central antenna generating a mobile signal.
When submitted to the CEM when they were young adults, before the appearance of Alzheimer's symptoms, the transgenic mice did not have any alteration of their cognitive abilities. When the exposure occurred at a later age, when the symptoms of the disease had appeared, the impairments of the memory, evaluated by tests, disappeared. More surprisingly, normal mice showed an improvement in their memory performance.
To explain the results that they themselves describe as surprising, the authors mention several possible mechanisms, which may complement each other: suppression of aggregation of amyloid plaques, a key phenomenon in the setting up of Alzheimer's disease; increased activity of neurons, but also temperature increase of 1 degree in the brain of exposed mice.
Studies have already indicated improvements in memory performance, and some therapies rely on EMFs, but it is premature to draw definitive conclusions. "We need to be cautious in extrapolating our results to mobile phone use and exposure to EMF in humans," warn the authors.