Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Protein marker associated with positive outcome in invasive breast cancer

16.11.2005


Breast cancer associated gene 2 is key



Researchers at Sunnybrook and Women’s College Health Sciences Centre have found a new protein marker linked to positive outcome in patients with breast cancer.

The research published today in Cancer Research is the first to show that patients with high levels of the protein BCA2 are less likely to experience breast cancer re-occurrence than patients with low levels of BCA2.


"For the first time we have been able to show that the over-expression of BCA2 is a favorable factor in breast cancer in relation to occurrence of lymph node metastases and regional recurrence," says principle investigator Dr. Arun Seth, senior scientist in molecular and cellular biology research at Sunnybrook & Women’s. "Higher levels of BCA2 are somewhat protective for regional recurrence."

Testing the effects of BCA2 expression in 1000 invasive breast tumor samples, researchers revealed that BCA2 is associated with the positive estrogen receptor, negative lymph node status and an increase in disease-free survival for regional recurrence.

Estrogen receptor (ER) positive invasive breast cancers in general have a better prognosis than ER-negative tumors and are less aggressive. In breast cancer where BCA2 and ER expression are co-regulated BCA2 might provide an alternative target for the treatment of hormone-refractory breast tumors.

BCA2, a novel RING type E3 ligase protein discovered by Seth’s lab in 2000 and filed for a patent in the US in 2002, has an inherent autoubiquitination activity. Ubiquitin is a small protein that marks other proteins by attaching itself to them and directing them to the proteasome for degradation. The BCA2 mediated such ubiquitin modification of the specific cancer related proteins affect breast cancer progression.

"Now that we have determined that higher levels BCA2 are associated with a positive outcome, we are working to determine whether the BCA2 ligase functions as an oncogene in some tissues and as a tumor suppressor in others," says Seth who is also a professor at the University of Toronto. "Targeting the BCA2 mediated breakdown of tumor suppressors could provide a new therapy to block breast tumor growth."

The Canada Foundation for Innovation and the Ontario Innovation Trust, now the Ontario Research Fund - Research Infrastructure, funded the infrastructure for this research. The Canadian Institutes of Health Research and the Canadian Breast Cancer Research Alliance provided operating grants.

Sunnybrook and Women’s College Health Sciences Centre is transforming health care through the dedication of its more than 10,000 staff members and volunteers. Specializing in women’s health programs, caring for Canada’s war veterans, conducting leading-edge research, and teaching the latest advances in healthcare through our affiliation with the University of Toronto, distinguishes Sunnybrook & Women’s as one of the country’s premier academic health sciences centres. Sunnybrook & Women’s improves the lives of hundreds of thousands of people each year by caring for newborns, adults and the elderly, treating and preventing cancer, heart and circulation diseases, disorders of the brain, mind and nervous system, orthopaedic and arthritic conditions, and traumatic injuries.

Jennifer White | EurekAlert!
Further information:
http://www.utoronto.ca/

More articles from Life Sciences:

nachricht Closing the carbon loop
08.12.2016 | University of Pittsburgh

nachricht Newly discovered bacteria-binding protein in the intestine
08.12.2016 | University of Gothenburg

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

Closing the carbon loop

08.12.2016 | Life Sciences

Applicability of dynamic facilitation theory to binary hard disk systems

08.12.2016 | Physics and Astronomy

Scientists track chemical and structural evolution of catalytic nanoparticles in 3-D

08.12.2016 | Materials Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>