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 July 23, 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 July 23, 2014).

Share This




More Health & Medicine News

Wednesday, July 23, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Courts Conflicted Over Healthcare Law

Courts Conflicted Over Healthcare Law

AP (July 22, 2014) Two federal appeals courts issued conflicting rulings Tuesday on the legality of the federally-run healthcare exchange that operates in 36 states. (July 22) Video provided by AP
Powered by NewsLook.com
Why Do People Believe We Only Use 10 Percent Of Our Brains?

Why Do People Believe We Only Use 10 Percent Of Our Brains?

Newsy (July 22, 2014) The new sci-fi thriller "Lucy" is making people question whether we really use all our brainpower. But, as scientists have insisted for years, we do. Video provided by Newsy
Powered by NewsLook.com
Scientists Find New Way To Make Human Platelets

Scientists Find New Way To Make Human Platelets

Newsy (July 22, 2014) Boston scientists have discovered a new way to create fully functioning human platelets using a bioreactor and human stem cells. Video provided by Newsy
Powered by NewsLook.com
Gilead's $1000-a-Pill Drug Could Cure Hep C in HIV-Positive People

Gilead's $1000-a-Pill Drug Could Cure Hep C in HIV-Positive People

TheStreet (July 21, 2014) New research shows Gilead Science's drug Sovaldi helps in curing hepatitis C in those who suffer from HIV. In a medical study, the combination of Gilead's Hep C drug with anti-viral drug Ribavirin cured 76% of HIV-positive patients suffering from the most common hepatitis C strain. Hepatitis C and related complications have been a top cause of death in HIV-positive patients. Typical medication used to treat the disease, including interferon proteins, tended to react badly with HIV drugs. However, Sovaldi's %1,000-a-pill price tag could limit the number of patients able to access the treatment. TheStreet's Keris Lahiff reports from New York. Video provided by TheStreet
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