Featured Research

from universities, journals, and other organizations

Secondhand smoke exposure worse for toddlers, obese children

Date:
November 18, 2009
Source:
American Heart Association
Summary:
Some children may suffer greater consequences of secondhand smoke exposure. In both toddlers and adolescents, obesity enhances the cardiovascular toxicities of secondhand smoke exposure. Toddlers had a four times greater risk of secondhand smoke exposure when compared to adolescents, despite having similar reported home exposures.

Toddlers and obese children suffer more than other youth when exposed to secondhand smoke, according to research presented at the American Heart Association's Scientific Sessions 2009.

"Secondhand smoke in children is not just bad for respiratory issues, as has been previously described by other researchers," said John Anthony Bauer, Ph.D., the study's senior co-author and principal investigator at Nationwide Children's Hospital & Research Institute at Ohio State University in Columbus. "Our data support the view that cardiovascular effects of secondhand smoke in children are important, particularly for the very young and those who are obese. We had not investigated the impact of obesity in previous studies."

Bauer and colleagues recruited American boys and girls, including 52 toddlers (ages 2 to 5 years) and 107 adolescents (ages 9 to 18 years). The study included black, white and Hispanic children, including obese toddlers and adolescents.

The researchers found:

  • There was a link between the amount of secondhand smoke exposure and a marker of vascular injury in toddlers. This link was two times greater in toddlers who were obese.
  • Obese adolescents exposed to secondhand smoke had two times the evidence of vascular injury compared to normal-weight adolescents.
  • Toddlers had a four times greater risk of secondhand smoke exposure when compared to adolescents, despite having similar reported home exposures.
  • Toddlers exposed to secondhand smoke had a 30 percent reduction in circulating vascular endothelial progenitor cells, a cell type involved in repair and maintaining a healthy blood vessel network.

"The changes we detected in these groups of children are similar to changes that are well recognized risks for heart disease in adults," Bauer said. "This suggests that some aspects of adult heart disease may be initiated in early childhood, where prevention strategies may have great long-term impact."

Bauer and colleagues determined the extent of secondhand smoke exposures and, via blood samples, analyzed vascular injury markers and inflammation for each child. They also measured the numbers of circulating vascular endothelial progenitor cells. They obtained height, weight, blood pressure and socioeconomic information for each child studied.

Many forms of cardiovascular disease start in childhood, and at least a quarter of children in the United States are exposed to secondhand smoke. Researchers tried to determine if children exposed to secondhand smoke had measurable changes in markers of cardiovascular disease and if some children, particularly obese children, were at greater risk of these problems.

"We do know that secondhand smoke as well as smoking causes increased oxidation and inflammation," Bauer said. "Separately, other studies within the past few years have shown that obesity is a physiological condition of chronic low-grade inflammation, and that this can lead to vascular damage. We think that the two factors together (eg., smoke exposures plus obesity) may interact to amplify the degree of inflammation or vascular cell damage that occurs."

Bauer and colleagues looked at a cross-section of children at one point in time. Whether these differences progress or change over time as the children grow is unknown.

"Our findings add to the importance of eliminating smoking and related exposures, especially for children, and obese children may need to be even more protected from these exposures," Bauer said.

Co-authors are Judith Groner, M.D.; Hong Huang, M.D., Ph.D.; Bing Han, Ph.D.; and Bethany Hashiguchi, M.S. Author disclosures are on the abstract.

The National Institutes of Health funded the study.


Story Source:

The above story is based on materials provided by American Heart Association. Note: Materials may be edited for content and length.


Cite This Page:

American Heart Association. "Secondhand smoke exposure worse for toddlers, obese children." ScienceDaily. ScienceDaily, 18 November 2009. <www.sciencedaily.com/releases/2009/11/091118101354.htm>.
American Heart Association. (2009, November 18). Secondhand smoke exposure worse for toddlers, obese children. ScienceDaily. Retrieved April 18, 2014 from www.sciencedaily.com/releases/2009/11/091118101354.htm
American Heart Association. "Secondhand smoke exposure worse for toddlers, obese children." ScienceDaily. www.sciencedaily.com/releases/2009/11/091118101354.htm (accessed April 18, 2014).

Share This



More Health & Medicine News

Friday, April 18, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

'Holy Grail' Of Weight Loss? New Find Could Be It

'Holy Grail' Of Weight Loss? New Find Could Be It

Newsy (Apr. 18, 2014) In a potential breakthrough for future obesity treatments, scientists have used MRI scans to pinpoint brown fat in a living adult for the first time. Video provided by Newsy
Powered by NewsLook.com
Little Progress Made In Fighting Food Poisoning, CDC Says

Little Progress Made In Fighting Food Poisoning, CDC Says

Newsy (Apr. 18, 2014) A new report shows rates of two foodborne infections increased in the U.S. in recent years, while salmonella actually dropped 9 percent. Video provided by Newsy
Powered by NewsLook.com
Scientists Create Stem Cells From Adult Skin Cells

Scientists Create Stem Cells From Adult Skin Cells

Newsy (Apr. 17, 2014) The breakthrough could mean a cure for some serious diseases and even the possibility of human cloning, but it's all still a way off. Video provided by Newsy
Powered by NewsLook.com
Obama: 8 Million Healthcare Signups

Obama: 8 Million Healthcare Signups

AP (Apr. 17, 2014) President Barack Obama gave a briefing Thursday announcing 8 million people have signed up under the Affordable Care Act. He blasted continued Republican efforts to repeal the law. (April 17) Video provided by AP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins