Navigation Links
Einstein researchers discover protein that contributes to cancer spread
Date:12/8/2008

December 8, 2008 BRONX, NY - In an important finding published online in Developmental Cell, researchers at Albert Einstein College of Medicine of Yeshiva University, along with collaborators at Massachusetts Institute of Technology, have identified a protein likely responsible for causing breast cancer to spread.

Metastatic cancer occurs when cancer cells from the original tumor travel to distant sites via the blood system. Most cancer deaths are due to cancer that has spread to other organs. Trying to stop cancer before it metastasizes is the main goal of cancer treatments. Upon diagnosis, 6 out of 10 breast cancer patients have cancer that is still in its primary location making the potential discovery of a marker for invasive cancer of tremendous value that could better inform treatment options.

Until now, early markers of metastatic breast cancer have been hard to find. However, in the Einstein-led study, researchers have identified a protein that is a promising candidate for a metastatic breast cancer marker.

The protein, called Menainv is present in invasive cells within a breast tumor. These cells move into surrounding tissue and eventually to blood vessels. Menainv is not on breast tumor cells that stay put (resident cells). This is the first time that a protein has been shown to contribute to the invasive and metastatic ability of tumor cells, rather than just being an 'innocent bystander' that shows up when cells are invading, strengthening the potential use of this protein as a marker.

The research was conducted under the direction of and in the laboratories of John S. Condeelis, Ph.D., Einstein professor and co-chair of anatomy and structural biology and co-director of Gruss Lipper Biophotonics Center and Frank B. Gertler, Ph.D., Ross Scholar Professor of Biology at MIT.

The latest research was aided considerably by the work of Jeffrey B. Wyckoff, principal associate, department of anatomy and structural biology at Einstein who, with Dr. Condeelis, developed the in vivo invasion assay used to isolate metastatic tumor cells from breast tumors thereby implicating Mena as an important gene for metastasis.

Evanthia T. Roussos, an M.D.-Ph.D. student in Dr. Condeelis' lab and primary co-author of the study, explains, "We have micro-needles filled with growth factors and tissue that we insert into a tumor on an anesthetized mouse. If a cell is invasive, within four hours, it will crawl into the needles. We found that mouse breast tumor cells that we engineered to contain Menainv were invasive whereas cells that did not have Menainv were not."

Another finding from the study that has important implications for patient treatment is that tumor cells harboring Menainv are less likely to be responsive to newer breast cancer treatments that inhibit epidermal growth factor receptors (EGFR). Epidermal growth factor (EGF) has been shown to increase a breast cancer cell's invasive potential. The study investigators propose that drugs which inhibit EGF may lack effectiveness on tumor cells that express Menainv. That's because Menainvcells are so sensitive to EGF that even the small amount of EGF signal that the drugs fail to block may be enough to stimulate EGF receptor and promote tumor cell migration and metastasis.

If Menainv behaves similarly in humans as it does in mice, it would be an especially attractive marker for metastatic breast cancer because the structure of Menainv would enable an antibody or a PCR assay to be developed to identify it. Such an antibody or PCR assay could be used to diagnose the presence of Menainv in biopsies and blood samples allowing doctors to identify breast cancer patients who are more likely to have progressive disease and recommend the appropriate treatment.

The current study builds on previous research by Dr. Condeelis' group which identified Menainv as the isoform of Mena that is over expressed in the invasive and metastatic subpopulation of tumor cells in breast tumors. The current study shows that Menainv forces tumor cells in mammary tumors of mice to become invasive and eventually metastasize to the lung.


'/>"/>

Contact: Michael Heller
mheller@aecom.yu.edu
718-430-3101
Albert Einstein College of Medicine
Source:Eurekalert

Related medicine news :

1. NIH awards Einstein multimillion dollar grant to extend studies of exceptional longevity
2. Albert Einstein Healthcare Network Turns to InterviewDirect to Qualify Job Candidates
3. Einstein scientists treat cancer as an infectious disease -- with promising results
4. Testing delays cause severe AIDS complications, Einstein researchers find
5. Sens. Kerry, Boxer and Feinstein call on FDA to Establish Maximum Level for Lead in Lipstick
6. Johnson City Medical Center Begins Offering Einstein Bros. Menu Items at Second On Campus Location
7. Einstein honors Dr. Stanley Nathenson with Marshall S. Horwitz Faculty Prize for Research Excellence
8. Einstein researchers discover gene mutations linked to longer lifespans
9. Einstein researchers genetically engineer immune cells into potent weapons for battling HIV
10. Novel discovery by Einstein scientists could lead to much-needed kidney failure treatment
11. Pioneering Heart Surgeon, Robert E. Michler, M.D., Appointed Chair of Surgery and Surgeon-in-Chief at Einstein and at Montefiore Medical Center
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/26/2016)... ... June 27, 2016 , ... Quality metrics are proliferating in cancer care, and ... in the eye of the beholder, according to experts who offered insights and commentary ... of Managed Care. For the full issue, click here . , For the ...
(Date:6/26/2016)... ... , ... PawPaws brand pet supplements owned by Whole Health Supply ... health of felines. The formula is all-natural and is made from Chinese herbs that ... Cat Kidney Support Supplement Soft Chews are Astragalus Root Extract and Rehmannia Root ...
(Date:6/25/2016)... Washington, D.C. (PRWEB) , ... June 25, 2016 ... ... will discuss health policy issues and applications at AcademyHealth’s Annual Research Meeting June ... share their work on several important health care topics including advance care planning, ...
(Date:6/25/2016)... ... , ... "With 30 hand-drawn hand gesture animations, FCPX users can easily customize ... Pixel Film Studios. , ProHand Cartoon’s package transforms over 1,300 hand-drawn pictures into ... Simply select a ProHand generator and drag it above media or text in the ...
(Date:6/25/2016)... ... June 25, 2016 , ... Dr. Calvin Johnson has ... he has implemented orthobiologic procedures as a method for treating his patients. The ... first doctors to perform the treatment. Orthobiologics are substances that orthopaedic surgeons use ...
Breaking Medicine News(10 mins):
(Date:6/24/2016)... SAN FRANCISCO, Calif. , June 24, 2016 ... GBT ), a biopharmaceutical company developing novel therapeutics ... significant unmet needs, today announced the closing of ... shares of common stock, at the public offering ... shares in the offering were offered by GBT. ...
(Date:6/24/2016)... June 24, 2016 The Academy of Managed ... recommendations that would allow biopharmaceutical companies to more ... that make formulary and coverage decisions, a move that ... new medicines. The recommendations address restrictions in ... on the drug label, a prohibition that hinders decision ...
(Date:6/24/2016)... According to a new market ... Needles, Safety Pen Needles), Needle Length (4mm, 5mm, 6mm, ... of Purchase (Retail, Non-Retail) - Trends & Global Forecasts ... market for the forecast period of 2016 to 2021. ... by 2021 from USD 1.65 Billion in 2016, growing ...
Breaking Medicine Technology: