Navigation Links
Nicotine Receptors Could Be Lung Cancer Treatment Target
Date:6/15/2009

Compound inhibited receptors and led to cancer cell death in mouse study

MONDAY, June 15 (HealthDay News) -- In a study of mice with lung cancer, a treatment that targeted nicotine receptors more than doubled the animals' survival time, Italian researchers say.

Nicotine plays a dual role in lung cancer. Changes in genes encoding nicotine receptors not only drive the urge the smoke, but also increase susceptibility to lung cancer. Exposure to nicotine boosts the expression of nicotine receptors, which leads to increased cell proliferation and inhibits the programmed cell death known as apoptosis.

In the new study, published in the June 15 issue of the American Journal of Respiratory and Critical Care Medicine, the compound α-CbT dampened the expression of nicotine receptors and increased apoptosis, prolonging the lives of the mice.

"This research clearly has profound clinical implications regarding the role of nicotine in stimulating lung cancer and nicotine receptor antagonists in treating the disease," said Dr. John Heffner, past president of the American Thoracic Society, in a news release from the society. Heffner, who was not involved in the research, added, "The highly addictive nature of nicotine, however, complicates patients' ability to quit smoking and avoid ongoing nicotine exposure."

Previous research has shown that it's possible to dampen the response of nicotine acetylcholine receptors (nAChRs) using an antagonist called d-tubocurarine/α-Cobratoxin (α-CbT), which specifically targeted the area most linked to increased cell growth.

In the study, researchers grafted human non-small-cell lung carcinoma (NSCLC) onto the lungs of mice and then delayed treatment, allowing the tumors to become well-established.

The mice were then divided into three groups: the untreated group; the standard chemotherapy drug group; and the α-CbT group.

Mice that were categorized as non-obese/severe combined immunodeficient (NOD/SCID) and treated with cisplatin (the standard chemotherapy agent) were found to have a 16 percent longer median survival time than untreated mice. NOD/SCID mice treated with α-CbT had an increased median survival time of 1.7-fold over the cisplatin-treated mice and 2.1-fold over untreated mice.

"The results of this study show that α-CbT, a powerful, high-affinity α-7-nAChR inhibitor, induces antitumor activity against NSCLC by triggering apoptosis," wrote Patrizia Russo of the Lung Cancer Unit of the National Cancer Research Institute in Genoa, Italy, in the news release.

Noncancerous cells did not appear to be affected by α-CbT, suggesting limited toxicity, the researchers found, but they noted that cancer cells with the most receptor binding sites seemed have the greatest treatment sensitivity.

"The goal of this research line is to explore the widest range of possibilities of intervention on the α7-nAChRs," Russo said. "We hope to move further on towards the clinical setting experimentation phase for the assessment of potentially new treatment strategies for NSCLC."

More information

The U.S. National Cancer Institute has more on non-small-cell lung cancer.



-- Jennifer Thomas



SOURCE: American Thoracic Society, news release, June 15, 2009


'/>"/>
Copyright©2009 ScoutNews,LLC.
All rights reserved  

Related medicine news :

1. AUDIO from Medialink and Commit Lozenge: Wanna Quit Smoking With Therapeutic Nicotine? Just Follow the Directions
2. Nicotine in breast milk disrupts infants sleep patterns
3. Nicotine in Breast Milk Shortens Babys Naptime
4. Initial reaction to nicotine can dictate addiction
5. Rat Study Gets at Root of Nicotine Addiction
6. Nicotine, Chili Peppers Offer Post-Surgery Pain Relief
7. Parkinsons Institute research shows that nicotine reduces levodopa-induced dyskinesias
8. Genes, brain chemistry may dictate nicotine cravings, says CU-Boulder study
9. Nicotine Plus Alcohol May Be Tough to Beat
10. Nicotine addiction slashed in test of new cigarette smoking strategy
11. Nicotine-Reduced Cigarettes Could Boost Quitting
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Nicotine Receptors Could Be Lung Cancer Treatment Target
(Date:4/25/2017)... ... April 25, 2017 , ... Saad B. Chaudhary, MD is committed to providing the highest quality ... problems, I focus on preventative care with all my patients to alleviate possible future issues. ... feel free to contact my office and my trained staff will assist you in any ...
(Date:4/25/2017)... ... April 25, 2017 , ... There is no better place ... to a special report in the May issue of Consumer Reports focused on heart ... ranking for results achieved during and after coronary bypass and aortic valve replacement procedures. ...
(Date:4/24/2017)... Massachusetts (PRWEB) , ... April 24, 2017 , ... ... will help busy nursing professionals advance their careers. Beginning in the fall of 2017, ... Nursing (BSN) degree in as few as 16 months and for as little as ...
(Date:4/24/2017)... ... , ... The Santana Telehealth Project was honored with the 2017 ATA Humanitarian ... Association’s annual conference, on April 23 in Orlando, FL. , “I am proud that ... of the poor and underserved in other parts of the world,” said Jonathan Linkous, ...
(Date:4/24/2017)... , ... April 24, 2017 , ... ... Research Association’s Outstanding Public Communication of Education Research Award. The award honors scholars ... education communities. It recognizes a scholar who has demonstrated the capacity to deepen ...
Breaking Medicine News(10 mins):
(Date:4/24/2017)... CITY, Calif. , April 24, 2017 ... durability, grip, protection, and comfort, announces the release of ... Powerform S8+. This most recent example of leading edge ... density grip pattern for 200% more tactile grip on ... user protection and durability. With TracTek and a suite ...
(Date:4/20/2017)...  Zimmer Biomet Holdings, Inc. (NYSE and SIX: ZBH), ... it will be participating in the Deutsche Bank Securities ... in Boston, Massachusetts on Wednesday, ... a.m. Eastern Time. A live webcast of ... Relations website at http://investor.zimmerbiomet.com .  The webcast will ...
(Date:4/20/2017)... ZappRx, Inc ., a digital health company focused on modernizing ... closed $25 million in Series B funding led by Qiming ... Seattle that is part of a broader ... round included participation from SR One , who led ... (formerly Google Ventures). As part of the financing, Mark ...
Breaking Medicine Technology: