Friday, October 18, 2013
Air pollution leading cause of cancer, WHO finds
If you are talking about third worlders cooking over a cow-dung fire in a windowless hut, maybe. For the rest it's just opinion based on rodents or an inconclusive correlational base
The World Health Organisation (WHO) has said outdoor air pollution is a leading cause of cancer in humans.
The International Agency for Research on Cancer declared on Thursday that air pollution is a carcinogen, alongside known dangers such as asbestos, tobacco and ultraviolet radiation. The decision came after a consultation by an expert panel organized by IARC, the cancer agency of the World Health Organisation.
"The air we breathe has become polluted with a mixture of cancer-causing substances," said Kurt Straif of the WHO's International Agency for Research on Cancer (IARC).
"We now know that outdoor air pollution is not only a major risk to health in general, but also a leading environmental cause of cancer deaths."
The IARC said a panel of top experts had found "sufficient evidence" that exposure to outdoor air pollution caused lung cancer and raised the risk of bladder cancer.
Although the composition of air pollution and levels of exposure can vary dramatically between locations, the agency said its conclusions applied to all regions of the globe.
Air pollution was already known to increase the risk of respiratory and heart diseases.
The IARC said pollution exposure levels increased significantly in some parts of the world in recent years, notably in rapidly industrialising nations with large populations.
The most recent data, from 2010, showed that 223,000 lung cancer deaths worldwide were the result of air pollution, the agency said.
In the past, the IARC had measured the presence of individual chemicals and mixtures of chemicals in the air - including diesel engine exhaust, solvents, metals, and dust.
But the latest findings were based on overall air quality.
"Our task was to evaluate the air everyone breathes rather than focus on specific air pollutants," said the IARC's Dana Loomis.
"The results from the reviewed studies point in the same direction: the risk of developing lung cancer is significantly increased in people exposed to air pollution," he added.
The predominant sources of outdoor air pollution were transport, power generation, emissions from factories and farms, and residential heating and cooking, the agency said.
The half-price IVF that boosts chance of getting pregnant: New technique uses far fewer drugs and could be done during a woman's lunch hour
A half-price version of IVF that women could have in their lunch-hour has been shown to raise the chances of having a baby drastically.
It is particularly effective for those in their late 30s and early 40s and success rates are almost twice as high as the conventional fertility treatment.
The technique involves using far lower doses of drugs, with the result that it is not only far cheaper, but also has virtually no side effects.
Many women undergoing normal IVF suffer from mood swings, nausea and headaches. In rare cases it can cause a life-threatening condition whereby their abdomen fills with fluid.
This new method, known as mini-IVF, involves giving women a daily pill for ten to 12 days which contains a low dose of the fertility drug clomid.
This encourages their ovaries to produce eggs and during this time the women undergo ultrasound scans every few days to check the eggs are developing healthily.
Once the eggs are large enough – around another ten days later – they are removed during a five-minute operation which does not require a general anaesthetic.
This means women can have it done before work, or during their lunch break, unlike normal IVF which lasts half a day and requires them to be put to sleep.
Doctors from St Louis, Missouri, who developed the method say it should be routinely offered to all women as it is cheaper, safer and a far more effective alternative.
Trials involving 520 women unveiled at the American Society for Reproductive Medicine conference in Boston showed that success rates for women over 35 were a third higher compared with those undergoing conventional IVF.
The results were even better among the over-40s – those using this new method were twice as likely to have a baby compared to if they had used the conventional fertility treatment.
Dr Sherman Silber, a fertility expert who helped develop the method, said it was so effective it offered women in their 40s the same chance of falling pregnant as those in their twenties.
In women aged 35 or below, success rates are about the same as standard IVF but the researchers say they would also benefit from using it because it is far cheaper and has fewer side effects.
Dr Silber said: ‘This is perfect for Britain and it would save an incredible amount of money. This is the magic solution.’
A course of mini-IVF costs between £1,200 and £1,800 compared with standard IVF which is between £3,000 and £4,000.
The reason it is so much cheaper is that it involves using far lower doses of the fertility drug clomid.
But this also makes it safer as large amounts of medication can lead to the deadly condition ovarian hyperstimulation syndrome whereby their abdomens fill with fluid – this occurs in 1 per cent of women having IVF.
One of main reasons women in their late 30s and early 40s have problems conceiving either naturally or with IVF is that they do not produce enough healthy eggs, capable of developing into an embryo and eventually a foetus.
In fact, the high dose fertility drugs used in conventional IVF worsen this problem as although they make a woman produce more eggs, they also appear to result in changes in the DNA of the eggs which make them defective.
But mini-IVF only uses very low doses of the drugs that do not make the woman’s eggs less healthy.
Professor Geeta Nargund, a consultant gynaecologist at the London fertility clinic Create said: ‘This study is a valuable addition to the growing evidence that mild stimulation IVF needs to become the first choice in IVF clinics for many women.’
Posted by jonjayray at 12:34 AM