Saturday November 17, 2018

High Exposure to Radio Frequency Radiation Increase Risk of Cancer

Interestingly, the team found that rats exposed to whole body RFR lived longer than rats unexposed to any radiation

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High exposure to radio frequency radiation linked to cancer. Pixabay
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Exposure to high levels of radio frequency radiation (RFR) — used in 2G and 3G cell phones — can increase the risk of cancer tumours in the heart, brain and adrenal gland, researchers have warned.

The study, led by the US National Institutes of Health’s National Toxicology Programme (NTP), looked at the effects of exposing rodents to extremely high levels of radiofrequency throughout the entire body.

While high levels of RFR caused cancerous tumours in the heart (found very rarely in humans), brain and adrenal gland, of male rats, the findings on female rats were ambiguous.

“The exposures used in the studies cannot be compared directly to the exposure that humans experience when using a cell phone. In our studies, rats and mice received radio frequency radiation across their whole bodies,” John Bucher, researcher from the NTP, said in a statement.

“By contrast, people are mostly exposed in specific local tissues close to where they hold the phone,” Bucher added.

For the study, the team housed the animals in chambers specifically designed for the study.

Exposure to RFR began in the womb for rats and at 5 to 6 weeks old for mice, and continued for up to two years, or most of their natural lifetime.

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Cancer ribbon. Pixabay

However, the RFR exposure was intermittent — 10 minutes on and 10 minutes off — totalling about nine hours each day.

In addition, the RFR levels ranged from 1.5-6 watts per kilogram in rats, and 2.5-10 watts per kilogram in mice.

“We believe that the link between radio frequency radiation and tumours in male rats is real,” Bucher noted.

Interestingly, the team found that rats exposed to whole body RFR lived longer than rats unexposed to any radiation.

“This may be explained by an observed decrease in chronic kidney problems that are often the cause of death in older rats,” the researchers noted.

Also Read- Actress Richa Chadha Speaks Upon Patriarchal Society

According to the US Food and Drug Administration (FDA), while animal studies contribute to discussions on the topic, “this study was not designed to test the safety of cell phone use in humans, so we cannot draw conclusions about the risks of cell phone use from it.”

Since the exposure levels and durations in the studies were greater than what people experience, “we agree that these findings should not be applied to human cell phone usage”, the FDA said on Thursday. (IANS)

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Conflicting Theories About Cellphone Radiations By Two Federal Agencies

He pointed out one well-known risk from cellphones: Car crashes when drivers are distracted by them.

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A pedestrian talking on a cellphone is silhouetted in front of a fountain in Philadelphia. VOA

Two U.S. government agencies are giving conflicting interpretations of a safety study on cellphone radiation: One says it causes cancer in rats. The other says there’s no reason for people to worry.

No new research was issued Thursday. Instead, the National Toxicology Program dialed up its concerns about a link to heart and brain cancer from a study of male rats that was made public last winter.

The Food and Drug Administration, which oversees cellphone safety, disagreed with the upgraded warning. And “these findings should not be applied to human cellphone usage,” said Dr. Jeffrey Shuren, FDA’s chief of radiological health.

What’s most important is what happens in humans, not rats, said Dr. Otis Brawley, chief medical officer of the American Cancer Society.

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While his agency said the risks to rats don’t directly apply to people, the study raises safety questions. Pixabay

“The incidence of brain tumors in human beings has been flat for the last 40 years,” Brawley said. “That is the absolute most important scientific fact.”

The original study

In a $30 million study, scientists put rats and mice into special chambers and bombarded them with radiofrequency waves, like those emitted by older 2G and 3G phones, for nine hours a day for up to two years, most of their natural lives.

The levels the rodents experienced were far higher than people are typically exposed to.

The findings

Last February, the National Toxicology Program said there was a small increase in an unusual type of heart tumor in male rats, but not in mice or female rats. The agency concluded there was “some evidence” of a link. Also, the February report cited “equivocal evidence” of brain tumors in the male rats.

Thursday, the agency upgraded its description of those findings. The heart tumor increase marked “clear evidence” of cancer in male rats, it announced. There is “some evidence” of brain cancer.

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A radiologist examines the brain X-rays of a patient. In a small study, patients with brain tumors were given genetically modified poliovirus, which helped their bodies attack the cancer. VOA

The change came after the agency asked outside experts to analyze the findings.

“We believe that the link between radio frequency radiation and tumors in male rats is real, and the external experts agreed,” said John Bucher, the toxicology agency’s senior scientist.

While his agency said the risks to rats don’t directly apply to people, the study raises safety questions.

The disagreement

The FDA immediately disagreed, firing off a press release assuring Americans that “decades of research and hundreds of studies” has made the health agency confident that the current safety limits for cellphone radiation protect the public health.

Plus, FDA pointed out confusing findings from the rodent study — such as that the radiated rats lived longer than comparison rats that weren’t exposed to the rays. The toxicology agency said it appeared that the radio frequency energy helped older rats’ kidneys.

There’s a reason two different government agencies are clashing — they’re asking different questions, said George Washington University public health professor George Gray.

 

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The Food and Drug Administration, which oversees cellphone safety, disagreed with the upgraded warning. And “these findings should not be applied to human cellphone usage Pixabay

 

A former science chief for the Environmental Protection Agency, Gray said the toxicology program examined how cellphone radiation affected animals. By looking at what it means for humans, the FDA “brings in more sources of information and data than just these recent tests in rats and mice,” he said in an email.

So are cellphones safe?

“I’m calling you from my cellphone,” noted the cancer society’s Brawley.

He pointed out one well-known risk from cellphones: Car crashes when drivers are distracted by them.

Also Read: Aggressive Treatment Of Prostate Cancer May Also Lead To Usage Of Anti-Depressants: Study

As for cancer, if people are concerned, they could use earphones or speakers, he said.

Those who study risk aren’t hanging up.

“My family and I won’t change our mobile phone habits based on this news,” said George Washington’s Gray, co-author of the book “Risk: A Practical Guide for Deciding What’s Really Safe and What’s Really Dangerous in the World Around You.” (VOA)