Navigation Links
Obese children more susceptible to asthma from air pollution
Date:1/22/2014

Obese children exposed to high levels of air pollutants were nearly three times as likely to have asthma, compared with non-obese children and lower levels of pollution exposure, report researchers at Columbia University Medical Center (CUMC).

Rates of childhood obesity and asthma have both increased dramatically in the past 30 years. The percentage of American children who are obese has increased from 7% in 1980 to 20% in 2008. Childhood asthma is up from 4% in 1980 to 10% in 2009. Rates are higher among urban minority populations.

The researchers followed 311 children in predominantly Dominican and African-American neighborhoods of New York City. They monitored indoor air in each child's home for two weeks at age 5 or 6, to measure exposure to a family of air pollutants, polycyclic aromatic hydrocarbons (PAH). The child's height and weight were measured and respiratory questionnaires were administered. In all, 20% were found to have asthma and 20% were categorized as obese based on body mass index.

The researchers found that high PAH exposure was associated with asthma only among obese children. In particular, the association was with the alkylated forms of PAH, which are emitted by vehicles and by cigarette smoke, cooking, incense, burning candles, and various other indoor sources. A two- to three-fold increase in asthma risk was seen among obese children exposed to high levels of the PAH chemicals 1-methylphenanthrene and 9-methylphenanthrene. Exposure to PAH or obesity alone did not predict asthma.

"Our results suggest that obesity may magnify the effects of these air pollutants, putting children at greater risk for having asthma," says lead author Kyung Hwa Jung, PhD, associate research scientist in the Department of Medicine at Columbia University College of Physicians and Surgeons (P&S).

The mechanism behind the association is not well understood. One possible explanation is that sedentary lifestyle in obese children could result in more time spent indoors, thereby increasing exposure to indoor PAH. Another may have to do with more rapid breathing in those who are obese.

Better understanding of the risk factors opens the door to more targeted interventions. "These findings suggest that we may be able to bring down childhood asthma rates by curbing indoor, as well as outdoor, air pollution and by implementing age-appropriate diet and exercise programs," says senior author Rachel Miller, MD, Professor of Medicine (in Pediatrics) and Environmental Health Sciences, chief of Pediatric Allergy and Immunology at CUMC, and co-deputy director of the Columbia Center for Children's Environmental Health at Columbia's Mailman School of Public Health.

The study builds on earlier research findings that linked increased asthma risk with exposure to higher levels of air pollution. Drs. Jung and Miller previously had shown an association between repeated high prenatal and childhood PAH exposure and asthma. A number of studies also have found an association between obesity and asthma.


'/>"/>

Contact: Timothy S. Paul
tp2111@columbia.edu
212-305-2676
Columbia University's Mailman School of Public Health
Source:Eurekalert

Related biology news :

1. For obese teen girls, aerobic exercise may trump resistance training in health benefits
2. Obese stomachs tell us diets are doomed to fail
3. Obese dads pass on predisposition to obesity and metabolic disorders to their kids
4. Food contaminants worsen metabolic problems in obese mice
5. People with a disability more likely to be obese, have chronic illnesses
6. Obese male mice father offspring with higher levels of body fat
7. Eating fewer, larger meals may prove healthier for obese women
8. Obese dogs at risk of health condition experienced by humans
9. Obese moms give birth to heart healthier kids following bariatric surgery
10. Obese patients face higher radiation exposure from CT scans -- but new technology can help
11. Researchers unravel genetic mechanism of fatty liver disease in obese children
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:5/6/2017)... 5, 2017 RAM Group , ... new breakthrough in biometric authentication based on a ... properties to perform biometric authentication. These new sensors are ... created by Ram Group and its partners. This sensor ... supply chains and security. Ram Group is a ...
(Date:4/18/2017)... , April 18, 2017  Socionext Inc., a global expert in ... media edge server, the M820, which features the company,s hybrid codec ... provided by Tera Probe, Inc., will be showcased during the upcoming ... NAB show at the Las Vegas Convention ... Click ...
(Date:4/13/2017)... According to a new market research report "Consumer IAM Market by Solution ... Authentication Type, Deployment Mode, Vertical, and Region - Global Forecast to 2022", ... 14.30 Billion in 2017 to USD 31.75 Billion by 2022, at a ... ... MarketsandMarkets Logo ...
Breaking Biology News(10 mins):
(Date:10/12/2017)... (PRWEB) , ... October 12, ... ... today announces publication of a United States multicenter, prospective clinical study that ... disposable, point-of-care diagnostic test capable of identifying clinically significant acute bacterial and ...
(Date:10/12/2017)... ... October 12, 2017 , ... ... Rosalind™, the first-ever genomics analysis platform specifically designed for life science researchers ... honor of pioneering researcher Rosalind Franklin, who made a major contribution to ...
(Date:10/11/2017)... , ... October 11, 2017 , ... Personal eye wash is a basic first aid ... at a time. So which eye do you rinse first if a dangerous substance enters ... Plum Duo Eye Wash with its unique dual eye piece. , “Whether its dirt ...
(Date:10/11/2017)...  VMS BioMarketing, a leading provider of patient support solutions, ... Educator (CNE) network, which will launch this week. The VMS ... care professionals to enhance the patient care experience by delivering ... health care professionals to help women who have been diagnosed ... ...
Breaking Biology Technology: