Study Finds No Effect on Calcium Signalling from Mobile Phones
Published on: 1st Jan 1970: 1:33am
A research study into the effects of electromagnetic radiation on cells has been published in the online journal PLoS One, revealing that acute (30 minute) application of GSM radiation has no effect on calcium transport inside biological cells.
The research project, part of the independently managed Mobile Telecommunications and Health Research (MTHR) programme funded by the UK's Department of Health and industry, aimed to establish whether the digital pulsed radiofrequency from modern GSM mobile phones influenced calcium levels in cells.
Calcium signals are at the heart of many cell communication processes throughout our lives, controlling how we grow and develop into healthy adults. Due to this central role of calcium, interference with its regulation by electromagnetic radiation could have serious consequences on cell physiology and human health.
The extensive, high-sensitivity analyses carried out in this study revealed that GSM mobile phone-type radiation had no effect on calcium signalling processes in three important types of cells, which had previously been suggested to be sensitive to radiofrequency fields; two neuronal cell types and a cell type that surrounds blood vessels.
Although the way in which electromagnetic fields could affect human biology is not established, it has been suggested that the types of radiofrequencies emitted by mobile phones may interfere with calcium signalling processes in cells; as calcium ions have a 'charge' they would be a natural candidate to interact with electromagnetic radiation.
Apart from its role in forming teeth and bones, calcium is a vital messenger inside cells, affecting many cell processes including muscle contraction, fertilisation and neural activity as well as switching genes on and off at critical times during development. Sometimes these calcium signals can be altered or activated at the wrong time, causing harmful changes in cell behaviour. Problems with calcium levels in the body underlie numerous health problems including high blood pressure, heart failure, cancer and bipolar disorders.
The research, carried out at the Babraham Institute, an institute of the BBSRC, investigated whether acute radiofrequency radiation emitted by mobile phones caused changes in calcium ions inside cells from the brain and blood vessels. A technique known as 'fluorescence imaging' was used to assess whether radiation akin to that emitted by mobile phones influenced cell signalling in mammalian cells growing in the laboratory. The behaviour of thousands of cells exposed to mobile phone-type radiation for periods of 30 minutes, a realistic time for a phone call, was individually analysed.
Different types of cells were used to see if there was any difference in sensitivity. In addition, the team looked at the effect of radiation levels on resting levels of calcium inside the cells and also on calcium signals that were deliberately triggered by the addition of a hormone or other stimulus.
The Babraham Institute is a centre for studying the basic biology of signalling inside and between cells, supporting the BBSRC's mission to drive advances in fundamental bioscience for better health and improved quality of life across the life course, reducing the need for medical and social intervention.
Dr Martin Bootman, Group Leader in Molecular Signalling at the Babraham Institute explained, "Our very sensitive equipment is able to detect even tiny changes in cell behaviour. However, we did not find any significant effect of radiofrequency exposure on cellular calcium, even with the highest radiation power which exceeds typical mobile phone emissions. This study indicates that calcium within cells is not acutely affected by mobile phone-type emissions. If individuals are sensitive to electromagnetic radiation it would have to be through a mechanism that does not involve changes in calcium transport."
Rod O'Connor, lead author of the paper commented, "The automated imaging system we constructed for these experiments allowed us to detect even the slightest change in calcium. We collaborated with some of the best physicists and engineers in the world to design a system to expose cells to mobile phone radiation. We worked very hard to make sure we had the dosimetry right and were very open-minded to what we might find. If short-term exposure to GSM radiation caused a change in calcium in cells, it would have been seen in these experiments. However, we were unable to find any evidence that GSM exposure had any influence on cellular calcium signals in these studies".