Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Researchers find potential celebrex target in lung cancer

15.07.2005


A product produced by lung cancer tumors fuels the cells that suppress immune function in patients and may be a target for Celebrex therapy, giving oncologists another weapon to fight cancer, according to a study by researchers at UCLA’s Jonsson Cancer Center.



Researchers found that PGE2, which is produced normally by epithelial cells but at very high levels in lung cancer and other malignancies, up-regulates the activity of lymphocytes called T-regulatory cells, which suppress immune function, making it even harder for a patient to fight cancer. For the first time, UCLA researchers showed that PGE2 increases the growth and function of T-regulatory cells, making them more effective immune suppressors, said Dr. Steven Dubinett, director of the Lung Cancer Research Program at UCLA’s Jonsson Cancer Center and senior author of the study.

The study appears in the July 15, 2005, issue of the peer-reviewed Journal of Immunology.


"We know that COX-2 inhibitors like Celebrex decrease PGE2, so when we discovered that PGE2 was fueling the T-regulatory cells, we knew we had a therapy we could test," said Dubinett, also a professor of pulmonary and critical care medicine and director of the Specialized Program of Research Excellence (SPORE) in lung cancer. "This discovery opens up the possibility that we could utilize relatively non-toxic drugs to augment immune responses in cancer patients."

The COX-2 inhibitors could be given with chemotherapy and immunotherapy drugs to help boost immune function in patients and help them to better fight cancer, Dubinett said.

Dubinett and his research team had hypothesized that PGE2 might be involved in suppression of the immune system. They first tested the theory in animal models and found that PGE2 was fueling the growth and function of the T-regulatory cells. Using Celebrex, researchers were able to decrease in number and function the T-regulatory cells by blocking PGE2. That study appeared in the June 15 issue of the peer-reviewed journal Cancer Research.

Dubinett and his team then validated their work in human cancer cell lines, the basis of the Journal of Immunology study. Again, administration of Celebrex decreased the number and function of T-regulatory cells, providing a boost to the immune system.

"Our data indicate that regulation of PGE2 production may in turn modulate T-regulatory cell development and function," the study states. "These findings suggest new therapeutic strategies targeting PGE2 in the prevention and treatment of cancer."

UCLA is launching a pilot study led by Dr. Karen Reckamp, an assistant professor of hematology/oncology, to further test their findings. Reckamp is seeking 24 patients with advanced lung cancer to participate in the study. Patients would take Celebrex for a week so researchers can study the drug’s affect on the T-regulatory cells. Patients would give blood before taking Celebrex and after the week-long course of therapy, Reckamp said, giving researchers a clue as to whether the drug will function in humans the way it has in cell and animal models.

For more information on the study, call 310-825-5688.

Dubinett said the clinical research study being conducted by Reckamp will begin to provide important information by determining if this therapy can contribute to augmenting immune responses in patients with lung cancer.

"If this research holds true in patients, it could provide a new avenue for using this drug in combination with other therapies to fight lung cancer," he said.

UCLA’s Jonsson Comprehensive Cancer Center is made up of more than 240 cancer researchers and clinicians engaged in cancer research, prevention, detection, control, treatment and education. One of the nation’s largest comprehensive cancer centers, the Jonsson Cancer Center is dedicated to promoting cancer research and translating the results into leading-edge clinical studies. In July 2005, the Jonsson Cancer Center was named the best cancer center in the western United States by U.S. News & World Report, a ranking it has held for six consecutive years.

Kim Irwin | EurekAlert!
Further information:
http://www.mednet.ucla.edu

More articles from Health and Medicine:

nachricht Biofilm discovery suggests new way to prevent dangerous infections
23.05.2017 | University of Texas at Austin

nachricht Another reason to exercise: Burning bone fat -- a key to better bone health
19.05.2017 | University of North Carolina Health Care

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: A quantum walk of photons

Physicists from the University of Würzburg are capable of generating identical looking single light particles at the push of a button. Two new studies now demonstrate the potential this method holds.

The quantum computer has fuelled the imagination of scientists for decades: It is based on fundamentally different phenomena than a conventional computer....

Im Focus: Turmoil in sluggish electrons’ existence

An international team of physicists has monitored the scattering behaviour of electrons in a non-conducting material in real-time. Their insights could be beneficial for radiotherapy.

We can refer to electrons in non-conducting materials as ‘sluggish’. Typically, they remain fixed in a location, deep inside an atomic composite. It is hence...

Im Focus: Wafer-thin Magnetic Materials Developed for Future Quantum Technologies

Two-dimensional magnetic structures are regarded as a promising material for new types of data storage, since the magnetic properties of individual molecular building blocks can be investigated and modified. For the first time, researchers have now produced a wafer-thin ferrimagnet, in which molecules with different magnetic centers arrange themselves on a gold surface to form a checkerboard pattern. Scientists at the Swiss Nanoscience Institute at the University of Basel and the Paul Scherrer Institute published their findings in the journal Nature Communications.

Ferrimagnets are composed of two centers which are magnetized at different strengths and point in opposing directions. Two-dimensional, quasi-flat ferrimagnets...

Im Focus: World's thinnest hologram paves path to new 3-D world

Nano-hologram paves way for integration of 3-D holography into everyday electronics

An Australian-Chinese research team has created the world's thinnest hologram, paving the way towards the integration of 3D holography into everyday...

Im Focus: Using graphene to create quantum bits

In the race to produce a quantum computer, a number of projects are seeking a way to create quantum bits -- or qubits -- that are stable, meaning they are not much affected by changes in their environment. This normally needs highly nonlinear non-dissipative elements capable of functioning at very low temperatures.

In pursuit of this goal, researchers at EPFL's Laboratory of Photonics and Quantum Measurements LPQM (STI/SB), have investigated a nonlinear graphene-based...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Marine Conservation: IASS Contributes to UN Ocean Conference in New York on 5-9 June

24.05.2017 | Event News

AWK Aachen Machine Tool Colloquium 2017: Internet of Production for Agile Enterprises

23.05.2017 | Event News

Dortmund MST Conference presents Individualized Healthcare Solutions with micro and nanotechnology

22.05.2017 | Event News

 
Latest News

Physicists discover mechanism behind granular capillary effect

24.05.2017 | Physics and Astronomy

Measured for the first time: Direction of light waves changed by quantum effect

24.05.2017 | Physics and Astronomy

Marine Conservation: IASS Contributes to UN Ocean Conference in New York on 5-9 June

24.05.2017 | Event News

VideoLinks
B2B-VideoLinks
More VideoLinks >>>