Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Natural insecticide identified as potential cancer prevention agent for early stage lung cancer

16.10.2002


Deguelin may inhibit growth of Akt, an essential molecule in the promotion of precancer



The use of deguelin, a natural plant extract most commonly used as an insecticide in Africa and South American, inhibits the growth of precancerous and cancerous lung cells, with no toxic effects on normal cells, according to a study presented today at the first annual Frontiers in Cancer Prevention Research meeting convened by the American Association for Cancer Research. The role of deguelin as an inhibitor of Akt activation has clinical implications, especially in non-small cell lung cancer (NSCLC), where constant activation of Akt occurs. Akt, or protein kinase B, is recognized as one of the most important molecules that promotes the survival of tumor cells by playing the critical role of controlling the balance between survival and apoptosis (programmed cell death).

The study investigated the effects of deguelin on cells representing different stages of lung cancer, and characterized the ways in which deguelin works on precancerous and cancerous human bronchial epithelial (HBE) cells. Deguelin has been isolated from plants such as Mundulea sericea (Leguminosae), which is native to Africa and South America.


"The results of our study provide evidence for the first time that Akt is essential in the growth of precancerous human bronchial epithelial cell line, and that deguelin can be a potential chemopreventive agent against lung cancer," according to Ho-Young Lee, Ph.D., lead investigator of the study, which was conducted by researchers at UT M.D. Anderson Cancer Center.

Several studies have shown that Akt provides a critical cell survival signal for tumor progression by adding phosphate to the proteins involved in cell cycle regulation and pre-cell death factors. Results of this study found that the activation of Akt is a common feature in the early stages of cancer and that inhibition of Akt might be a potential target for chemoprevention. Deguelin is an optimal agent for this goal, according to the results of the study, as it selectively blocked the growth of precancerous and cancerous HBE cells by causing cellular death, with no toxic effects on the HBE cells.

"The role of deguelin as an inhibitor of Akt activation has clinical implications, especially in the prevention and treatment of lung cancer, where controlled activation of Akt occurs at a high frequency" said Dr. Lee. "The manipulation of Akt activity alters the sensitivity of NSCLC cells to chemotherapy and irradiation. Therefore, targeting Akt using deguelin may enhance the effectiveness of chemotherapy and radiation therapy and increase the apoptotic potential of NSCLC cells."

The goal of chemoprevention for lung and other cancers is development of a specifically targeted agent with minimal toxicity that will delay, block or reverse cancer development.

An estimated 169,400 new cases of lung cancer will be diagnosed in 2002, accounting for 13 percent of cancer diagnoses, according to the American Cancer Society. Non-small cell lung cancer accounts for 75 to 80 percent of all lung cancer cases. Lung cancer will claim the lives of more than 154,900 men and women this year, accounting for 28 percent of all cancer deaths. Since 1987, more women have died each year from lung cancer than breast cancer, which, for over 40 years, was the major cause of cancer death in women. It is estimated that approximately 65,700 women will die from lung cancer and 39,600 women will die from breast cancer in 2002.

Aimee Frank | EurekAlert!
Further information:
http://www.aacr.org/

More articles from Health and Medicine:

nachricht Custom-tailored strategy against glioblastomas
26.09.2016 | Rheinische Friedrich-Wilhelms-Universität Bonn

nachricht New leukemia treatment offers hope
23.09.2016 | King Abdullah University of Science and Technology

All articles from Health and Medicine >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: New welding process joins dissimilar sheets better

Friction stir welding is a still-young and thus often unfamiliar pressure welding process for joining flat components and semi-finished components made of light metals.
Scientists at the University of Stuttgart have now developed two new process variants that will considerably expand the areas of application for friction stir welding.
Technologie-Lizenz-Büro (TLB) GmbH supports the University of Stuttgart in patenting and marketing its innovations.

Friction stir welding is a still-young and thus often unfamiliar pressure welding process for joining flat components and semi-finished components made of...

Im Focus: First quantum photonic circuit with electrically driven light source

Optical quantum computers can revolutionize computer technology. A team of researchers led by scientists from Münster University and KIT now succeeded in putting a quantum optical experimental set-up onto a chip. In doing so, they have met one of the requirements for making it possible to use photonic circuits for optical quantum computers.

Optical quantum computers are what people are pinning their hopes on for tomorrow’s computer technology – whether for tap-proof data encryption, ultrafast...

Im Focus: OLED microdisplays in data glasses for improved human-machine interaction

The Fraunhofer Institute for Organic Electronics, Electron Beam and Plasma Technology FEP has been developing various applications for OLED microdisplays based on organic semiconductors. By integrating the capabilities of an image sensor directly into the microdisplay, eye movements can be recorded by the smart glasses and utilized for guidance and control functions, as one example. The new design will be debuted at Augmented World Expo Europe (AWE) in Berlin at Booth B25, October 18th – 19th.

“Augmented-reality” and “wearables” have become terms we encounter almost daily. Both can make daily life a little simpler and provide valuable assistance for...

Im Focus: Artificial Intelligence Helps in the Discovery of New Materials

With the help of artificial intelligence, chemists from the University of Basel in Switzerland have computed the characteristics of about two million crystals made up of four chemical elements. The researchers were able to identify 90 previously unknown thermodynamically stable crystals that can be regarded as new materials. They report on their findings in the scientific journal Physical Review Letters.

Elpasolite is a glassy, transparent, shiny and soft mineral with a cubic crystal structure. First discovered in El Paso County (Colorado, USA), it can also be...

Im Focus: Complex hardmetal tools out of the 3D printer

For the first time, Fraunhofer IKTS shows additively manufactured hardmetal tools at WorldPM 2016 in Hamburg. Mechanical, chemical as well as a high heat resistance and extreme hardness are required from tools that are used in mechanical and automotive engineering or in plastics and building materials industry. Researchers at the Fraunhofer Institute for Ceramic Technologies and Systems IKTS in Dresden managed the production of complex hardmetal tools via 3D printing in a quality that are in no way inferior to conventionally produced high-performance tools.

Fraunhofer IKTS counts decades of proven expertise in the development of hardmetals. To date, reliable cutting, drilling, pressing and stamping tools made of...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

European Health Forum Gastein 2016 kicks off today

28.09.2016 | Event News

Laser use for neurosurgery and biofabrication - LaserForum 2016 focuses on medical technology

27.09.2016 | Event News

Experts from industry and academia discuss the future mobile telecommunications standard 5G

23.09.2016 | Event News

 
Latest News

New imaging technique in Alzheimer’s disease - opens up possibilities for new drug development

28.09.2016 | Medical Engineering

Innovate coating extends the life of materials for industrial use

28.09.2016 | Materials Sciences

Blockchain Set to Transform the Financial Services Market

28.09.2016 | Business and Finance

VideoLinks
B2B-VideoLinks
More VideoLinks >>>