Navigation Links
Selective Marker Found to Indicate Aggressive Form of Breast Cancer

Researchers have linked a structural protein called nestin to a particularly deadly form of breast cancer, identifying a new biomarker that could lead to earlier detection and better treatment.//

In the January 15 issue of Cancer Research, researchers from Dartmouth Medical School demonstrate that nestin could represent a selective biological marker for basal epithelial breast tumors, a highly aggressive cancer with similarities to mammary stem cells, the regenerative cells believed to be the site of breast cancer initiation.

'Patients with this type of breast cancer are at high risk for recurrence,' said James DiRenzo, Ph.D., assistant professor at Dartmouth Medical School. 'Ideally, a marker like nestin would enable clinicians to monitor these patients through frequent tests of a biomarker and, in doing so, detect the cancer before it has a chance to come back.'

Basal epithelial tumors lack important molecular targets such as the estrogen receptor, progesterone receptor and Her2. This not only makes positive diagnosis difficult, say researchers, but also eliminates several important lines of therapy, such as tamoxifen or Herceptin, that work well for other breast cancer subtypes.

'Currently, there is no direct means of determining if a breast cancer is a basal epithelial tumor – doctors only know for certain once the other forms of breast cancer are ruled out,' DiRenzo said. 'This type of breast cancer is generally difficult to manage, but several important studies have shown that it is more likely than other breast cancer subtypes to respond to certain types of therapy, which highlights the need for a definitive diagnostic marker.'

The basal epithelial breast cancer subtype represents 17 to 37 percent of all breast cancers and is more common in premenopausal African American women than in other demographic groups. Among breast cancers, this subtype is known to have an early age of onset and a very short time between treatment and relapse. It is more commonly detected during normal screening mammogram intervals than other screening subtypes, which likely reflects its aggressive nature. These important clinical correlations likely explain why this subtype disproportionately accounts for breast cancer mortality, according to DiRenzo.

In a retrospective study of breast cancer tumors lacking estrogen receptors, progesterone receptors and Her2, DiRenzo and his colleagues found extremely high amounts of nestin in 14 of 16 tumor samples examined. While the researchers plan to strengthen their findings with a larger prospective study, their results offer a crucial first step in diagnosis and management of a disease that is notoriously difficult to control. Consistent with other studies showing that breast cancers associated with inherited mutations in BRCA1 display the basal phenotype, DiRenzo and colleagues found high levels of nestin in these tumors as well.

Nestin is a long filamentous protein found in adult stem cells in the central nervous system. While scientists do not know its exact function, the protein is thought to have a role in stabilizing the structure of adult stem cells as they regenerate and divide into daughter cells.

'Normal basal epithelial tissue produces nestin, but basal epithelial tumors produce a tremendous amount of nestin, which likely represents an abnormal expansion of the basal epithelia.' DiRenzo said. 'If it is indeed specific to regenerative cells, then it will make for an excellent diagnostic tool for a cancer of regenerative mammary cells.'

According to the DiRenzo, another important next step will be finding an efficient means of detecting nestin in a clinical screening setting. While it seems unlikely that a blood test would be sufficient, DiRenzo believes that a non-invasive test that collects samples from mammary ducts may enable the development of a screening tool for at-risk patient s.


Related medicine news :

1. Selective eating just an evolutionary trait?
2. New Study Questions Cannibalism As A Worldwide Selective Force
3. Govt to Pass Amendment to Curb Sex Selective Abortions: Ramadoss
4. Selective Marker Found to Indicate Aggressive Form of Breast Cancer
5. Wiping Out Memories Selectively, is Possible Now
6. Blood Marker Found To Predict Colon Cancer
7. Biochemical Markers Might Help Predict Heart Problems
8. Elevated Insulin Levels To Influence Levels Of Inflammatory Markers
9. Protein Markers for Identification of Brain Tumor
10. Protein Expression to Serve as Marker for Head and Neck Cancer
11. A New Marker For Type-2 Diabetes ?
Post Your Comments:

(Date:10/13/2017)... (PRWEB) , ... October 13, 2017 , ... While it’s ... poses a problem. Fortunately, an inventor from Austin, Texas, has identified a solution. , ... medication in darkness or restricted lighting. As such, it eliminates the need to turn ...
(Date:10/13/2017)... ... , ... Lori R. Somekh, founder of the Law Office of Somekh ... law and special needs planning attorneys. “Membership in ElderCounsel helps our office remain up ... network with elder law attorneys nationwide,” said Somekh. , ElderCounsel was ...
(Date:10/13/2017)... ... October 13, 2017 , ... Global Healthcare Management’s 4th ... Park in Milford, NJ. This free event, sponsored by Global Healthcare Management’s CEO, ... The fun run is geared towards children of all ages; it is a non-competitive, ...
(Date:10/13/2017)... ... October 13, 2017 , ... “America On The Brink”: the ... “America On The Brink” is the creation of published author, William Nowers. Captain ... As a WWII veteran, he spent thirty years in the Navy. Following his ...
(Date:10/12/2017)... ... 2017 , ... IsoComforter, Inc. ( ), one of the ... new design of the shoulder pad. The shoulder pad provides optimal support and ... pain while using cold therapy. By utilizing ice and water that is circulated from ...
Breaking Medicine News(10 mins):
(Date:10/11/2017)... Texas , Oct. 11, 2017  Caris Life ... focused on fulfilling the promise of precision medicine, today ... has joined Caris, Precision Oncology Alliance™ (POA) as its ... cancer centers, the St. Jude Crosson Cancer Institute will ... advance the use of tumor profiling, making cancer treatment ...
(Date:10/11/2017)... CHICAGO , Oct. 11, 2017  Hill-Rom Holdings, ... its Aspen Surgical facility in Las Piedras, ... surgical scalpels and blades. ... confirmed that the facility sustained minor structural damage, temporary ... Hurricane Maria. Repairs have been completed, manufacturing operations have ...
(Date:10/10/2017)...   West Pharmaceutical Services, Inc. (NYSE: WST), ... administration, today shared the results of a study highlighting ... intradermal administration of polio vaccines. The study results were ... 2017 by Dr. Ondrej Mach , Clinical Trials ... (WHO), and recently published in the journal Vaccine. ...
Breaking Medicine Technology: