Brain cancer is up approximately 25% since cell phones became popular. Consequently, there are 183,000 more cases in the US alone per year. Since 1993 there are many lawsuits have been filed against the cell phones industry.
People who filed these lawsuits claimed that cell phone radiations induce the brain tumors. Although the claims were dismissed by the court due to lack of sufficient evidence. Also, there are many researchers studied the relationship between phone radiations and cancer.
In 1993, there was a case widespread in the media and was featured on CNN’s Larry King show. In this case, a man filed a lawsuit against the cell phone industry. He claimed that his wife died from a brain cancer caused by the repeated use of the cell phone.
He based on that the tumor was on the same side of her head where she held her cell phone and has a shape like a cell phone antenna. But, like other cases, the court refused his claims due to insufficient evidence.
Studies related to the cell phone and brain cancer, DNA damage as well as a blood-brain barrier breakdown
1- Studies made by the cell phone industry
To prove that cell phones are safe, the cell phone industry itself funded a $25 million-dollar research program. They hoped to get good results in order to diffuse the negative publicity from the many lawsuits. However, after 6 years of this research, the net results were not what they were looking for.
Dr. George Carlo, the leading research scientist of the program, found evidence that cell phones pose some health risks, possibly even cancer.
In 1997, there was a study received international media attention because it proved that cancer linked to the cell phone radiations for the first time.
Dr. Michael Repacholi and his colleagues from the Royal Adelaide Hospital in South Australia studied the effect of exposure to the cell phone radiations on the brain of mice. The results were shocking and they reported that long-term exposure to the type of radiation that comes from digital cell phones cause an increase in the occurrence of lymphoma.
2- The recent studies
After that, there was a flow of Epidemiological studies, performed by different investigators and using different methods. They showed some evidence of an increased risk of tumors among people who use cell phones repeatedly.
– In 1998, Dr. Ken Rothman of Epidemiology Resources, Inc. In Newton, Mass. found that users of cell phones have more than twice the risk of brain cancer than others.
– At the same year, Joshua Muscat, a research scientist from the American Health Foundation, reported in this study a higher risk of tumors, especially Neuro-epithelial, among cell phone users. He reported that the majority of cases have tumors on the same side of the skull where they hold cell phone antennas during calls.
– In a study requested by the World Health Organization, researchers led by Dr. Lennart Hardell of the Orebro Medical Center in Sweden between 1997 and 2000, examined 1,617 patients who had a brain tumor aged between 20 and 80.
Then, they compared them to healthy people, and they found those who used cell phones for less than 10 years faced a 20% higher risk of brain cancer. But for those who used them for more than a decade, the risk was 80% higher.
The study also found that tumors were 2.5 times more likely to be on the same side of the head as the phone was held. Consequently, the cancer of the vestibulocochlear (auditory) nerve, acoustic neuroma, showed a larger increase–3.5 times greater risk.
2- DNA DAMAGE IN HUMAN BLOOD
-After a single year of the shocking study, in 1998, Drs December, Ray Tice and Graham Hook of Integrated Laboratory Systems in North Carolina have suggested that exposing the blood cells to the radiations coming from cell phones cause them a genetic damage in the form of micronuclei.
In these studies, DNA and white blood cells suffer from damage that occurs when exposed to signals from all types of the phones such as analog, digital, and PCS.
Also, Dr. Joseph Roti Roti of Washington University in St. Louis in 2000, did a research showed that human blood cells exposed to radiation produced by wireless phone, indeed, develop genetic damage in the form of micronuclei, as the previous study.
3- Defect IN THE BLOOD-BRAIN BARRIER
The blood-brain barrier is a semipermeable membrane. It separates the circulating blood in the blood vessels from the brain and extracellular fluid in the central nervous system. The central nervous system consists of the brain and the spinal cord.
It is formed by endothelial cells that allow the passage of specific substances as water, grasses by passive diffusion. Furthermore, it allows the selective transport of molecules such as glucose and amino acids that are essential for neural function.
However, it prevents the passage of lipophilic substances (lipid soluble), neurotoxins by an active transport mechanism.
Consequently, this barrier filters the blood vessels of the brain and keeps dangerous chemicals from reaching sensitive brain tissue.
– Two studies In 1994, in 2002, mediated by Dr. Leif Salford from Lund University in Stockholm, Sweden, showed that mice exposed to cell phone radiation had a dangerous breakdown in the blood-brain barrier, as well as damaged neurons.
The explanation of the effect of cell phone radiations
1- Breakdown of the blood-brain barrier and nervous tissue would provide a pathway for cancer-causing chemicals in the bloodstream. They will leak into the brain and damage it.
2- Toxic chemicals may cause a severe damage to the DNA in the brain.
3- A number of studies showed that cell phone radiations cause impairment in the DNA repair mechanisms in brain cells. Then, Micronuclei result from a breakdown of the cells due to inability to repair themselves.
4- Furthermore, carcinogenesis induced by chemical toxins, could begin if the brain cells become unable to repair themselves.