Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

UC health news: molecular pathway may predict chemotherapy effectiveness

04.09.2007
A common molecular pathway could help physicians predict which lung cancer patients will benefit from chemotherapy drugs, according to new research from a multidisciplinary team at the University of Cincinnati (UC).

Known as the retinoblastoma (RB) tumor suppressor, this fundamental molecule regulates cell proliferation in the body. Research has shown that the RB pathway is either entirely inactive or altered in most human cancers. Scientists are beginning to use its actions as a “biomarker” for how tumors will respond to different therapies.

Michael Reed, MD, and his UC colleagues found that “turning off” the RB pathway in lung cancer cells resulted in an altered response to chemotherapy agents and more cancer cell death. They report their findings in the September 2007 issue of the journal Cancer Research.

“Dissecting the RB pathway will help us better understand how chemotherapy works and predict which patients might benefit from therapy and which ones won’t,” explains Reed, assistant professor of surgery at UC and a thoracic surgeon at University Hospital.

... more about:
»Agents »Molecular »chemotherapy »pathway »patients »predict

“As pathways are further defined, we could choose agents that are targeted to an individual tumor’s molecular characteristics,” he adds.

A previous UC study, published in the January 2007 issue of the Journal of Clinical Investigation, showed that when this pathway is disrupted or shut off in breast cancer, the tumor resists anti-estrogen drugs and the cancer continues to grow in spite of the therapy.

For this laboratory study, Reed’s team shut off the RB pathway in human non-small cell lung cancer cells and exposed them to chemotherapy agents representative of those currently used to treat lung cancer patients.

Their results showed that when RB was turned off, the cancer cells continued to divide, but became more susceptible to the drugs, so the tumors stopped growing.

“But the minute you take away the chemotherapy, the cells take off again,” says Reed. “This suggests that it’s not just loss of RB that affects therapy response—it could be changes at various steps in cellular signaling that result in different outcomes.”

“The traditional way of thinking of cancer—one cancer gene to treat and you’re done—is obviously not the best approach to treating this disease,” he adds. “These are complex, overlapping molecular pathways. Dissecting them and determining how to use that information to apply combinations of chemotherapeutic agents will allow for individualization of therapy.”

Next year, Reed and his colleagues expect to begin testing the RB tumor suppressor in human tumor tissue samples from the UC Thoracic Tumor Registry and compare them to patients with known outcomes.

According to the American Cancer Society, more than 213,000 Americans will be diagnosed with lung cancer in 2007. Because most people are diagnosed late, the five-year survival rate is only 14 percent—compared with 86 percent for breast cancer, 61 percent for colon cancer and 96 percent for prostate cancer.

Amanda Harper | EurekAlert!
Further information:
http://www.uc.edu

Further reports about: Agents Molecular chemotherapy pathway patients predict

More articles from Life Sciences:

nachricht The balancing act: An enzyme that links endocytosis to membrane recycling
07.12.2016 | National Centre for Biological Sciences

nachricht Transforming plant cells from generalists to specialists
07.12.2016 | Duke University

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

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

Im Focus: Significantly more productivity in USP lasers

In recent years, lasers with ultrashort pulses (USP) down to the femtosecond range have become established on an industrial scale. They could advance some applications with the much-lauded “cold ablation” – if that meant they would then achieve more throughput. A new generation of process engineering that will address this issue in particular will be discussed at the “4th UKP Workshop – Ultrafast Laser Technology” in April 2017.

Even back in the 1990s, scientists were comparing materials processing with nanosecond, picosecond and femtosesecond pulses. The result was surprising:...

Im Focus: Shape matters when light meets atom

Mapping the interaction of a single atom with a single photon may inform design of quantum devices

Have you ever wondered how you see the world? Vision is about photons of light, which are packets of energy, interacting with the atoms or molecules in what...

Im Focus: Novel silicon etching technique crafts 3-D gradient refractive index micro-optics

A multi-institutional research collaboration has created a novel approach for fabricating three-dimensional micro-optics through the shape-defined formation of porous silicon (PSi), with broad impacts in integrated optoelectronics, imaging, and photovoltaics.

Working with colleagues at Stanford and The Dow Chemical Company, researchers at the University of Illinois at Urbana-Champaign fabricated 3-D birefringent...

Im Focus: Quantum Particles Form Droplets

In experiments with magnetic atoms conducted at extremely low temperatures, scientists have demonstrated a unique phase of matter: The atoms form a new type of quantum liquid or quantum droplet state. These so called quantum droplets may preserve their form in absence of external confinement because of quantum effects. The joint team of experimental physicists from Innsbruck and theoretical physicists from Hannover report on their findings in the journal Physical Review X.

“Our Quantum droplets are in the gas phase but they still drop like a rock,” explains experimental physicist Francesca Ferlaino when talking about the...

Im Focus: MADMAX: Max Planck Institute for Physics takes up axion research

The Max Planck Institute for Physics (MPP) is opening up a new research field. A workshop from November 21 - 22, 2016 will mark the start of activities for an innovative axion experiment. Axions are still only purely hypothetical particles. Their detection could solve two fundamental problems in particle physics: What dark matter consists of and why it has not yet been possible to directly observe a CP violation for the strong interaction.

The “MADMAX” project is the MPP’s commitment to axion research. Axions are so far only a theoretical prediction and are difficult to detect: on the one hand,...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

ICTM Conference 2017: Production technology for turbomachine manufacturing of the future

16.11.2016 | Event News

Innovation Day Laser Technology – Laser Additive Manufacturing

01.11.2016 | Event News

#IC2S2: When Social Science meets Computer Science - GESIS will host the IC2S2 conference 2017

14.10.2016 | Event News

 
Latest News

NTU scientists build new ultrasound device using 3-D printing technology

07.12.2016 | Health and Medicine

The balancing act: An enzyme that links endocytosis to membrane recycling

07.12.2016 | Life Sciences

How to turn white fat brown

07.12.2016 | Health and Medicine

VideoLinks
B2B-VideoLinks
More VideoLinks >>>