Evidence that air pollution particles are passing from pregnant womens’ lungs into their placentas
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Scientists in the UK have found the first evidence that air pollution particles are passing from pregnant womens’ lungs into their placentas via the bloodstream.
The study, conducted by researchers at Queen Mary University of London, adds to an existing body of evidence linking pregnant mothers’ exposure to air pollution with issues including premature birth and childhood respiratory problems.“We’ve known for a while that air pollution affects foetal development and can continue to affect babies after birth and throughout their lives… [But] until now, there has been very little evidence that inhaled particles get into the blood from the lung,” Dr Lisa Miyashita, who worked on the study, said in a statement.
Within the cells, they found 72 small black areas that they believed to be carbon particles.“Our results provide the first evidence that inhaled pollution particles can move from the lungs into the circulation and then to the placenta,” said Dr Norrice Liu, who presented the research at the European Respiratory Society International Congress on Sunday.
“We do not know whether the particles we found could also move across into the foetus, but our evidence suggests that this is indeed possible,” she added.Professor Mina Gaga, president of the European Respiratory Society, said the research, which she was not involved in, “suggests a possible mechanism of how babies are affected by pollution while being theoretically protected in the womb.”
A series of previous studies have shown that air pollution significantly increases the risk of premature birth and of low birth weight, leading to lifelong damage to health. A large study of more than 500,000 births in London, published in December, confirmed the link and led doctors to say that the implications for many millions of women in polluted cities around the world are “something approaching a public health catastrophe”.
“This should raise awareness amongst clinicians and the public regarding the harmful effects of air pollution in pregnant women,” she added.
