Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Moffitt Cancer Center Researchers Say One Specific MicroRNA Promotes Tumor Growth and Cancer Spread

04.04.2013
Researchers at Moffitt Cancer Center have determined that the overexpression of microRNA-155 (miR-155), a short, single strand of ribonucleic acid encoded by the miR-155 host gene, promotes the growth of blood vessels in tumors, tumor inflammation, and metastasis. As a therapeutic target, miR-155 could potentially provide a new avenue of treatment when targeted with drugs to suppress its activity.
The study was published in an online issue of Oncogene in January.

MiR-155, which plays an important role in various physiological and pathological processes, is considered an indicator of poor prognosis for breast cancer patients when it is overexpressed. Controlling miR-155 expression could inhibit malignant growth, said the researchers.

“Our study shows that miR-155 is a driver of new blood vessel growth in tumors,” said study lead author Jin Q. Cheng, M.D., Ph.D., senior member of the Cancer Biology and Evolution Program at Moffitt. “It also plays a critical role in metastasis, especially in triple-negative breast cancer. This makes miR-155 both a prognostic marker and a potential therapeutic drug target.”

According to the researchers, several studies show that miR-155 is frequently increased in various human malignancies, including breast, lung, pancreatic and colon cancers. It also regulates a number of cell processes, including growth, survival, migration and invasion. Their study demonstrates that miR-155 promotes new blood vessel growth in breast cancer by targeting a natural tumor suppressor called VHL, part of an important cancer pathway for a cascade of events.
“Further studies could provide insight into the role of miR-155 in inflammation that leads to tumor progression,” noted the researchers, who found elevated miR-155 in triple-negative breast cancer, a form of breast cancer that does not express the genes for estrogen, progesterone and human epidermal growth factor receptors.

“Our findings are important for a number of reasons,” Cheng said. “We have shown that miR-155 targets and downregulates the tumor suppressor VHL and that miR-155 contributes to tumor growth and spread. This makes miR-155 a critical therapeutic target in breast cancer.”

The study was funded by federal grants CA14343, CA15308 and CA137041.
About Moffitt Cancer Center
Located in Tampa, Moffitt is one of only 41 National Cancer Institute-designated Comprehensive Cancer Centers, a distinction that recognizes Moffitt’s excellence in research, its contributions to clinical trials, prevention and cancer control. Since 1999, Moffitt has been listed in U.S. News & World Report as one of “America’s Best Hospitals” for cancer. With more than 4,200 employees, Moffitt has an economic impact on the state of nearly $2 billion. For more information, visit MOFFITT.org, and follow the Moffitt momentum on Facebook, twitter and YouTube.

Media release by Florida Science Communications

Kim Polacek | EurekAlert!
Further information:
http://www.moffitt.org

More articles from Health and Medicine:

nachricht New study points the way to therapy for rare cancer that targets the young
22.11.2017 | Rockefeller University

nachricht Penn study identifies new malaria parasites in wild bonobos
21.11.2017 | University of Pennsylvania School of Medicine

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: Nanoparticles help with malaria diagnosis – new rapid test in development

The WHO reports an estimated 429,000 malaria deaths each year. The disease mostly affects tropical and subtropical regions and in particular the African continent. The Fraunhofer Institute for Silicate Research ISC teamed up with the Fraunhofer Institute for Molecular Biology and Applied Ecology IME and the Institute of Tropical Medicine at the University of Tübingen for a new test method to detect malaria parasites in blood. The idea of the research project “NanoFRET” is to develop a highly sensitive and reliable rapid diagnostic test so that patient treatment can begin as early as possible.

Malaria is caused by parasites transmitted by mosquito bite. The most dangerous form of malaria is malaria tropica. Left untreated, it is fatal in most cases....

Im Focus: A “cosmic snake” reveals the structure of remote galaxies

The formation of stars in distant galaxies is still largely unexplored. For the first time, astron-omers at the University of Geneva have now been able to closely observe a star system six billion light-years away. In doing so, they are confirming earlier simulations made by the University of Zurich. One special effect is made possible by the multiple reflections of images that run through the cosmos like a snake.

Today, astronomers have a pretty accurate idea of how stars were formed in the recent cosmic past. But do these laws also apply to older galaxies? For around a...

Im Focus: Visual intelligence is not the same as IQ

Just because someone is smart and well-motivated doesn't mean he or she can learn the visual skills needed to excel at tasks like matching fingerprints, interpreting medical X-rays, keeping track of aircraft on radar displays or forensic face matching.

That is the implication of a new study which shows for the first time that there is a broad range of differences in people's visual ability and that these...

Im Focus: Novel Nano-CT device creates high-resolution 3D-X-rays of tiny velvet worm legs

Computer Tomography (CT) is a standard procedure in hospitals, but so far, the technology has not been suitable for imaging extremely small objects. In PNAS, a team from the Technical University of Munich (TUM) describes a Nano-CT device that creates three-dimensional x-ray images at resolutions up to 100 nanometers. The first test application: Together with colleagues from the University of Kassel and Helmholtz-Zentrum Geesthacht the researchers analyzed the locomotory system of a velvet worm.

During a CT analysis, the object under investigation is x-rayed and a detector measures the respective amount of radiation absorbed from various angles....

Im Focus: Researchers Develop Data Bus for Quantum Computer

The quantum world is fragile; error correction codes are needed to protect the information stored in a quantum object from the deteriorating effects of noise. Quantum physicists in Innsbruck have developed a protocol to pass quantum information between differently encoded building blocks of a future quantum computer, such as processors and memories. Scientists may use this protocol in the future to build a data bus for quantum computers. The researchers have published their work in the journal Nature Communications.

Future quantum computers will be able to solve problems where conventional computers fail today. We are still far away from any large-scale implementation,...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Ecology Across Borders: International conference brings together 1,500 ecologists

15.11.2017 | Event News

Road into laboratory: Users discuss biaxial fatigue-testing for car and truck wheel

15.11.2017 | Event News

#Berlin5GWeek: The right network for Industry 4.0

30.10.2017 | Event News

 
Latest News

Corporate coworking as a driver of innovation

22.11.2017 | Business and Finance

PPPL scientists deliver new high-resolution diagnostic to national laser facility

22.11.2017 | Physics and Astronomy

Quantum optics allows us to abandon expensive lasers in spectroscopy

22.11.2017 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>