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The hidden reason children born by C-section are more likely to develop asthma
Researchers at Rutgers University, the Copenhagen Prospective Studies on Asthma in Childhood and the University of Copenhagen have described for the first time how delivery by caesarean section interferes with a baby's ability to obtain beneficial germs from the mother's microbiome, and how this can lead to early childhood asthma.
The study, published in Science Translational Medicine, has implications for understanding the role of C-section delivery in potentially skewing a child's microbiota - the trillions of beneficial microorganisms that live in and on our bodies - and how this can influence health. It could lead to new prevention strategies, including targeted efforts to fix disturbances in a child's microbiome.
"Every generation of mothers hands over its microbiome to the next, as the baby is coated with beneficial germs while being squeezed through the birth canal - but this doesn't happen for babies born through C-section," said co-author Martin Blaser, director of the Center for Advanced Biotechnology and Medicine at Rutgers. "It takes a while for babies born through C-section to develop a normal microbiome. And during that time, while the immune system is also developing, they become more at risk for later developing certain diseases like asthma. This study provides a mechanism for the known link between C-section birth and heightened risk of asthma."
The researchers analysed the effects of vaginal birth versus C-section during the first year of life for 700 children. To determine whether the type of delivery caused disruptions in the microbiome, and whether these were associated with asthma, they examined children's fecal samples at one week, one month and one year to determine microbial diversity and maturity.
The researchers found that delivery by caesarean section was associated with more than a doubled risk of later asthma and allergies, as well as significant changes in the composition of the gut microbiota. However, at one year of age, the risk of asthma was reduced in C-section-born children if their gut microbiota had recovered from its initial disruption and begun to mature normally.
"Even though a child is born by caesarean section and has an immense early microbial perturbation, this may not lead to a higher risk of asthma if the microbiome matures sufficiently before age 1 year," says Jakob Stokholm, senior scientist at The Copenhagen Prospective Study on Asthma in Childhood and the study's first author. "Our study proposes the perspective of restoring a caesarean section-perturbed microbiome and thereby perhaps prevent asthma development in a child, who is otherwise at high risk.
Hina Zahid Joined Medical Dialogue in 2017 with a passion to work as a Reporter. She coordinates with various national and international journals and association and covers all the stories related to Medical guidelines, Medical Journals, rare medical surgeries as well as all the updates in the medical field. Email:Â editorial@medicaldialogues.in. Contact no. 011-43720751
Dr Kamal Kant Kohli-MBBS, DTCD- a chest specialist with more than 30 years of practice and a flair for writing clinical articles, Dr Kamal Kant Kohli joined Medical Dialogues as a Chief Editor of Medical News. Besides writing articles, as an editor, he proofreads and verifies all the medical content published on Medical Dialogues including those coming from journals, studies,medical conferences,guidelines etc. Email: drkohli@medicaldialogues.in. Contact no. 011-43720751