MedicineWorld.Org
Your gateway to the world of medicine
Home
News
Cancer News
About Us
Cancer
Health Professionals
Patients and public
Contact Us
Disclaimer

Medicineworld.org: Tamoxifen resistance

Back to breast cancer blog Blogs list Cancer blog  


Subscribe To Breast Cancer Blog RSS Feed  RSS content feed What is RSS feed?

Tamoxifen resistance




Tamoxifen is a widely used and highly successful drug in the treatment of breast cancer, though resistance to tamoxifen is still a concern in recurrent disease (affecting 25-35% of patients), since therapy resistant metastatic tumor cells are a major cause of death. In a study in this month's Molecular and Cellular Proteomics, researchers have uncovered a protein profile that may accurately predict whether a cancer will be tamoxifen resistant.

Arzu Umar and colleagues in the Netherlands and Washington examined thousands of tumor cells taken from 51 tamoxifen therapy-sensitive and therapy-resistant tumors using a combination of proteomic and mass-spectrometry approaches. Their analysis revealed a set of 100 proteins that were expressed at different abundance levels in the two tumor groups, highlighting a potential profile for tamoxifen resistance.



Tamoxifen resistance

In addition, they analyzed the most significantly altered protein, called extracellular matrix metalloproteinase inducer, or EMMPRIN, in a separate set 156 breast tumor tissue samples. EMMPRIN levels were higher in tamoxifen-resistant tumors and significantly associated with an earlier tumor progression following first line tamoxifen treatment and poor clinical outcome, suggesting EMMPRIN may be a reliable marker for highly aggressive breast cancer.

While further work with additional samples will be needed to validate these potential markers, the authors note this profile could be clinically useful, especially considering their approach used minute amounts of tissue samples, making it applicable at even the earliest tumor stages.


Posted by: Janet    Source




Did you know?
Tamoxifen is a widely used and highly successful drug in the treatment of breast cancer, though resistance to tamoxifen is still a concern in recurrent disease (affecting 25-35% of patients), since therapy resistant metastatic tumor cells are a major cause of death. In a study in this month's Molecular and Cellular Proteomics, researchers have uncovered a protein profile that may accurately predict whether a cancer will be tamoxifen resistant.

Medicineworld.org: Tamoxifen resistance

BREAST CANCER MAIN| Home| Breast cancer news| Common terms| Breast cancer treatment| Breast cancer treatment by stage| Mammogram and breast cancer screening| Surgical treatment of breast cancer| Chemotherapy of breast cancer| Chemo drugs used in breast cancer| Doxorubicin| Cyclophosphamide| Methotrexate| Hormonal therapy of breast cancer| Radiation therapy of breast cancer| Monoclonal therapy| High dose chemotherapy for breast cancer| Recurrent breast cancer| Bisphosphonates and breast cancer| Pregnancy and breast cancer| Risk factors for breast cancer| Risk details| My risk| Comprehensive breast cancer information| Breast cancer statistics| African Americans and breast cancer| Ashkenazi and breast cancer| Asians| Hispanic| Men| Native Americans| Older women and breast cancer| Younger women| Pregnant women and breast cancer| BRCA|

Copyright statement
The contents of this web page are protected. Legal action may follow for reproduction of materials without permission.