Navigation Links
Scientists unravel resistance to breast cancer treatment
Date:10/31/2012

Scientists have identified a molecular 'flag' in women with breast cancer who do not respond or have become resistant to the hormone drug tamoxifen.

Tamoxifen used alongside traditional chemotherapy and radiotherapy blocks the female hormone oestrogen that, in certain breast cancers, is required by the tumour to grow; it has been shown to improve cancer survival rates by up to one third.

However, about one third of patients with the appropriate type of breast cancer known as oestrogen receptor positive breast cancer do not respond to tamoxifen or develop resistance to the drug. Oestrogen receptor positive breast cancer is the most common form of the disease accounting for 70% of cases.

Now, a team from the University of Manchester's Paterson Institute for Cancer Research has identified a molecular flag or biomarker that will help doctors predict which patients will respond best to complementary (adjuvant) hormone therapy with tamoxifen.

"The identification of molecular flags to classify subgroups of breast cancer and so determine the best treatment for each patient is of increasing importance in cancer therapy," said study lead Professor Gran Landberg.

"Tamoxifen has been shown to be highly effective in some breast cancer patients when used alongside traditional cancer therapies but, in a third of cases, the result has not been what we would hope. If we can predict which patients will respond to tamoxifen, and those who won't, then this is clearly advantageous as it means the correct treatment is provided instantly which will improve disease outcomes."

The research, funded by the charity Breakthrough Breast Cancer and published in the journal PLoS One, looked at the connective tissue surrounding the tumour, which is known to send signals that help the cancer to grow. The team, part of the Manchester Cancer Research Centre, found that fibroblast cells the cells that make up connective tissue in our bodies differ in their characteristics from patient to patient and can give clues about tamoxifen treatment response

Co-author Dr Susann Busch said: "We analysed tissue samples from 564 women with invasive breast cancer, some of whom were given tamoxifen and some who weren't; this allowed us to make a comparison between treatment responses.

"We discovered that women who had low levels of a protein known as pERK in their cancer-associated fibroblasts did not respond to tamoxifen. Testing patients for the pERK flag could help doctors determine whether tamoxifen is an appropriate treatment for their patient or whether alternative therapies should be explored, so saving time and money."

The researchers now plan to further study molecular flags that are characteristic for cancer-associated fibroblasts. Understanding how fibroblasts help the tumour to grow will allow the development of new strategies to block their harmful signals and overcome drug resistance.


'/>"/>

Contact: Aeron Haworth
aeron.haworth@manchester.ac.uk
44-161-275-8383
University of Manchester
Source:Eurekalert

Related biology news :

1. Stanford scientists build the first all-carbon solar cell
2. Gladstone, Stanford scientists block toxic protein that plays key role in Lou Gehrigs disease
3. Scientists deepen genetic understanding of MS
4. Whitehead scientists identify major flaw in standard approach to global gene expression analysis
5. USDA scientists collaborate with global researchers to advance the mapping of the barley genome
6. Scientists uncover mechanism by which plants inherit epigenetic modifications
7. CT scan and 3-D print help scientists reconstruct an ancient mollusk
8. Scientists conclude high fructose corn syrup should not be blamed for obesity
9. Maintaining Earths sustainability: Scientists, engineers, educators take coordinated approach
10. UMN scientists get federal grant for biotechnology development to purify fracking water
11. Scientists reveal how natural antibiotic kills tuberculosis bacterium
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:2/3/2016)... India , February 3, 2016 ... the new market research report "Automated Fingerprint Identification System ... Search, Latent Search), Application (Banking & Finance, Government, Healthcare, ... published by MarketsandMarkets, the market is expected to be ... CAGR of 21.0% between 2015 and 2020. The transformation ...
(Date:2/2/2016)... 2016 This BCC Research report provides ... reviewing the recent advances in high throughput ‘omic ... field forward. Includes forecast through 2019. ... and opportunities that exist in the bioinformatic market. ... as well as IT and bioinformatics service providers. ...
(Date:2/2/2016)... , Feb. 2, 2016  Based on its ... & Sullivan recognizes US-based Intelligent Retinal Imaging Systems ... Sullivan Award for New Product Innovation. IRIS, a ... North America , is poised to ... growing diabetic retinopathy market. The IRIS technology presents ...
Breaking Biology News(10 mins):
(Date:2/8/2016)... DURHAM, N.C. , Feb. 8, 2016 Novan, Inc. ... named Chairman of the Board of Directors of Novan. In addition, ... Directors. North Carolina . ... The Company also announced that it received a total of $32.8 ... December 2015 from its private investor network originating throughout the Research ...
(Date:2/8/2016)... , Feb. 8, 2016  BioElectronics Corporation ... medical devices, announced today that it is responding ... proceedings from the Securities and Exchange Commission posted ... Staelin , Chairman of the Board of BioElectronics ... of Business Administration at The Fuqua School of ...
(Date:2/8/2016)... ... ... Bulk food product inspection systems are specifically designed to ... production process. Despite frequently inspecting loose product prior to packaging, product inspection systems ... of dry powders. , Mettler-Toledo Product Inspection's brand-new white paper entitled "Improving Food ...
(Date:2/8/2016)... (NYSE MKT: NNVC) (the "Company"), a nanomedicine company developing anti-viral drugs, ... present information about the company,s programs at the BIOCEO conference today ... City . --> --> ... Registered attendees can request a one on one meeting through the conference ... --> New York City . --> ...
Breaking Biology Technology: