Featured Research

from universities, journals, and other organizations

Nicotine's Addictive Hold Increases When Combined With Other Tobacco Smoke Chemicals, UCI Study Finds

Date:
October 29, 2004
Source:
University Of California, Irvine
Summary:
Acetaldehyde, one of the main chemical components of tobacco smoke, appears to increase the addictive properties of nicotine, according to animal studies conducted by the UC Irvine Transdisciplinary Tobacco Use Research Center (TTURC). In addition, the researchers found that adolescents are most vulnerable to the rewarding effects of the nicotine-acetaldehyde combination.

Acetaldehyde, one of the main chemical components of tobacco smoke, appears to increase the addictive properties of nicotine, according to animal studies conducted by the UC Irvine Transdisciplinary Tobacco Use Research Center (TTURC). In addition, the researchers found that adolescents are most vulnerable to the rewarding effects of the nicotine-acetaldehyde combination.

Related Articles


Study results appear in the online version of Neuropsychopharmacology.

Nicotine is the primary chemical in cigarette smoke that causes addiction, yet when tested in animal studies, the draw of nicotine alone appears to be relatively weak compared to other abused drugs. Surprised by this phenomenon, UCI researchers conducted a series of studies in rodents to determine whether nicotine may interact with some of the other 4,000 components of tobacco smoke to enhance addictiveness.

"We chose to study acetaldehyde because it is a major component of tobacco smoke, present in a one-to-two ratio to nicotine," said James Belluzzi, lead researcher and adjunct professor of pharmacology in the UCI College of Medicine. "Additionally, there is evidence that acetaldehyde may play a role in alcohol addiction."

Belluzzi, researcher Ruihua Wang and Frances Leslie, professor of pharmacology and TTURC director, evaluated possible acetaldehyde and nicotine interactions in a rigorous self-administration test. Adolescent and adult male rats were tested in a procedure during which each nose poke by the rodents delivered acetaldehyde or nicotine, a combination of both drugs, or saline.

Adolescent animals quickly learned to self-administer the nicotine-acetaldehyde combination significantly more than saline or either drug alone. Furthermore, young adolescents were more responsive to the drug combination than older adolescents.

When adult animals were tested in identical experiments, they did not self-administer the nicotine-acetaldehyde mixture or either drug alone at levels significantly higher than saline.

Belluzzi and his team also used self-administration tests of cocaine to test the reliability of the novel self-administration procedure and to evaluate whether early adolescence was a period of enhanced vulnerability to other abused drugs. Although adolescent rats are more responsive to the nicotine-acetaldehyde mix than adult rats, the young rats were not more responsive to cocaine than adults.

"Our latest findings suggest that the study of tobacco addiction, as well as the development of smoking cessation treatments, could be improved by studying the interactions of nicotine with other smoke components," Leslie said.

About the UCI Transdisciplinary Tobacco Use Research Center: The UCI TTURC is one of a national network of seven centers funded jointly by the National Institute on Drug Abuse and National Cancer Institute in partnership with the Robert Wood Johnson Foundation. The major research focus of the center is to identify key factors that underlie susceptibility to nicotine addiction in adolescents and young adults.

About the University of California, Irvine: The University of California, Irvine is a top-ranked public university dedicated to research, scholarship and community service. Founded in 1965, UCI is among the fastest-growing University of California campuses, with approximately 24,000 undergraduate and graduate students and about 1,300 faculty members. The third-largest employer in dynamic Orange County, UCI contributes an annual economic impact of $3 billion.


Story Source:

The above story is based on materials provided by University Of California, Irvine. Note: Materials may be edited for content and length.


Cite This Page:

University Of California, Irvine. "Nicotine's Addictive Hold Increases When Combined With Other Tobacco Smoke Chemicals, UCI Study Finds." ScienceDaily. ScienceDaily, 29 October 2004. <www.sciencedaily.com/releases/2004/10/041029101333.htm>.
University Of California, Irvine. (2004, October 29). Nicotine's Addictive Hold Increases When Combined With Other Tobacco Smoke Chemicals, UCI Study Finds. ScienceDaily. Retrieved January 31, 2015 from www.sciencedaily.com/releases/2004/10/041029101333.htm
University Of California, Irvine. "Nicotine's Addictive Hold Increases When Combined With Other Tobacco Smoke Chemicals, UCI Study Finds." ScienceDaily. www.sciencedaily.com/releases/2004/10/041029101333.htm (accessed January 31, 2015).

Share This


More From ScienceDaily



More Mind & Brain News

Saturday, January 31, 2015

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

NFL Concussions Down; Still on Parents' Minds

NFL Concussions Down; Still on Parents' Minds

AP (Jan. 30, 2015) The NFL announced this week that the number of game concussions dropped by a quarter over last season. Still, the dangers of the sport still weigh on players, and parents&apos; minds. (Jan. 30) Video provided by AP
Powered by NewsLook.com
Study Shows Newborn Chicks Count From Left to Right Just Like Humans

Study Shows Newborn Chicks Count From Left to Right Just Like Humans

Buzz60 (Jan. 30, 2015) Researchers for the first time identified human&apos;s innate preference for associating low and high numbers with the left and right respectively in another species. Jen Markham (@jenmarkham) explains. Video provided by Buzz60
Powered by NewsLook.com
Best Mood Elevating, Feel Good Shakes & Smoothies

Best Mood Elevating, Feel Good Shakes & Smoothies

Buzz60 (Jan. 30, 2015) You can elevate your mood by having a meal in a glass. Fitness and nutrition expert John Basedow (@JohnBasedow) offers the best &apos;feel good&apos; smoothies and shakes chock full of depression-relieving ingredients...including apples, berries, lemons, cucumbers, papaya, kiwi, spinach, kale, whey protein, matcha, ginger, turmeric and cinnamon. Video provided by Buzz60
Powered by NewsLook.com
Poll Says Firstborn Is Responsible, Youngest Is Funnier

Poll Says Firstborn Is Responsible, Youngest Is Funnier

Newsy (Jan. 30, 2015) According to a poll out of the U.K., eldest siblings feel more responsible and successful than their younger siblings. 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:

Strange & Offbeat Stories


Health & Medicine

Mind & Brain

Living & Well

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