Featured Research

from universities, journals, and other organizations

Prenatal maternal smoking associated with increased risk of adolescent obesity

Date:
September 3, 2012
Source:
JAMA and Archives Journals
Summary:
Prenatal exposure to maternal cigarette smoking appears associated with an increased risk for adolescent obesity, and is possibly related to subtle structural variations in the brain that create a preference for eating fatty foods.

Prenatal exposure to maternal cigarette smoking appears associated with an increased risk for adolescent obesity, and is possibly related to subtle structural variations in the brain that create a preference for eating fatty foods, according to a report published Online First by Archives of General Psychiatry, a JAMA Network publication.

"Prenatal exposure to maternal cigarette smoking is a well-established risk factor for obesity, but the underlying mechanisms are not known," the authors write as background information. "Preference for fatty foods, regulated in part by the brain reward system, may contribute to the development of obesity."

Amirreza Haghighi, M.D., of the Hospital for Sick Children,Toronto,Canada, and colleagues, studied 378 adolescents age 13 to 19 years who were recruited through high schools in one region ofQuebec,Canada, as part of the ongoing Saguenay Youth Study. Participants were grouped as exposed to maternal smoking (n=180) or nonexposed to maternal smoking (n=198) and participants in each group were matched at recruitment by maternal education and participant's school attendance to minimize confounding influence of socioeconomic status (SES), and did not differ by sex, age, puberty stage or height.

The authors defined exposed as having a mother who smoked more than one cigarette a day during the second trimester of pregnancy, and nonexposed as having a mother who did not smoke one year before (and throughout) the pregnancy.

Exposed versus nonexposed participants weighed less at birth and were breastfed for shorter periods of time. At the time of analysis, exposed participants had a marginally higher body weight and BMI, and a significantly higher total body fat compared with nonexposed participants. These differences persisted after adjustment for age, sex, and height (when appropriate), and were still significant when adjusting for additional variables frequently associated with maternal smoking during pregnancy (i.e., lower birth weight, shorter duration [or lack of] breastfeeding, and lower SES).

Exposed versus nonexposed participants also exhibited a significantly lower volume of the amygdala (part of the brain that plays a role in processing emotions and storing memories), and the authors found that, consistent with its possible role in limiting fat intake, amygdala volume correlated inversely with fat intake.

"Prenatal exposure to maternal cigarette smoking may promote obesity by enhancing dietary preference for fat, and this effect may be mediated in part through subtle structural variations in the amygdala," the authors conclude.


Story Source:

The above story is based on materials provided by JAMA and Archives Journals. Note: Materials may be edited for content and length.


Journal Reference:

  1. Haghighi A, Schwartz DH, Abrahamowicz M, et al. Prenatal Exposure to Maternal Cigarette Smoking, Amygdala Volume, and Fat Intake in Adolescence. Archives of General Psychiatry, 2012; DOI: 10.1001/archgenpsychiatry.2012.1101

Cite This Page:

JAMA and Archives Journals. "Prenatal maternal smoking associated with increased risk of adolescent obesity." ScienceDaily. ScienceDaily, 3 September 2012. <www.sciencedaily.com/releases/2012/09/120903221124.htm>.
JAMA and Archives Journals. (2012, September 3). Prenatal maternal smoking associated with increased risk of adolescent obesity. ScienceDaily. Retrieved August 27, 2014 from www.sciencedaily.com/releases/2012/09/120903221124.htm
JAMA and Archives Journals. "Prenatal maternal smoking associated with increased risk of adolescent obesity." ScienceDaily. www.sciencedaily.com/releases/2012/09/120903221124.htm (accessed August 27, 2014).

Share This




More Mind & Brain News

Wednesday, August 27, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Stroke in Young Adults

Stroke in Young Adults

Ivanhoe (Aug. 27, 2014) A stroke can happen at any time and affect anyone regardless of age. This mother chose to give her son independence and continue to live a normal life after he had a stroke at 18 years old. Video provided by Ivanhoe
Powered by NewsLook.com
Distracted Adults: ADHD?

Distracted Adults: ADHD?

Ivanhoe (Aug. 27, 2014) Most people don’t realize that ADHD isn’t just for kids. It can affect the work as well as personal lives of many adults, and often times they don’t even know they have it. Video provided by Ivanhoe
Powered by NewsLook.com
The Sight and Sounds of Autism

The Sight and Sounds of Autism

Ivanhoe (Aug. 27, 2014) A new study is explaining why for some people with autism what they see and what they hear is out of sync. Video provided by Ivanhoe
Powered by NewsLook.com
Experiences Make Us Happy, Even Just Waiting For Them

Experiences Make Us Happy, Even Just Waiting For Them

Newsy (Aug. 27, 2014) New research finds we get more excited to buy experiences than we do to buy material things. Video provided by Newsy
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