Navigation Links
VEGF may not be relevant biomarker for advanced prostate cancer
Date:4/29/2013

PHILADELPHIAThe well-studied protein VEGF does not appear to have any prognostic or predictive value for men with locally advanced prostate cancer, researchers from the Department of Radiation Oncology at Thomas Jefferson University Hospital and other institutions found in a retrospective study published online April 25 in the journal BMC Radiation Oncology.

VEGF, or vascular endothelial growth factor, induces blood vessel growth, a process known as angiogenesis, which is a key element in solid tumor growth and metastasis. It is overexpressed, along with its receptors, in various cancers, including breast, renal cell carcinoma and gliomas, and has been shown to help predict response to certain drugs.

However, conflicting data in the literature has left the role of VEGF in prostate cancer as a useful biomarker unclear and controversial.

Here, in one of the largest studies of VEGF expression in prostate cancer, senior author Adam P. Dicker, MD, PhD, Chair of the Department of Radiation Oncology at Jefferson, and colleagues retrospectively analyzed data from two groups of men with locally advanced prostate cancer: those who had only radiation therapy and those who had short-term neoadjuvant and concurrent androgen deprivation therapy and radiation therapy.

Data was collected using pathologic material of over 100 men from the Radiation Therapy Oncology Group 8610 phase III randomized control trial to explore VEGF's potential as a biomarker, one that could be used to improve the treatment of prostate cancer patients through better targeted therapies.

Based on the results, however, researchers posit that the VEGF protein may not be a relevant biomarker for this patient group. They found no statistically significant difference in pre-treatment characteristics among men with varying VEGF levels and no correlation between VEGF expression and overall survival, distant metastasis, local progression, disease-free survival, or biochemical failure.

What's more, there was no difference between the two treatment arms, those who had androgen therapy and radiation therapy and those who just had radiation. The median follow up time was for all surviving patients was 12.2 years.

"VEGF in this disease does not have a driver role," said Dr. Dicker. "The clinical trials using VEGF inhibitors did not have clinical benefit, so this study confirms that this is not a path forward to tacking this disease."

The results are not definitive statements about VEGF, the authors explain, but reporting on this well-characterized population with long-term follow is a significant contribution to the literature.

"This study is among the larger studies of VEGF expression in prostate cancer, and we urge the research community to avoid the misrepresentation of the literature with a lack of publication of even well-designed large negative studies, a publication bias against negative trials, as the current literature in this area appears to be predominated by only small exploratory positive trials, with a lack of subsequent confirmation with larger, longer prospectively designed trials," the authors write.

Other institutions included Prince Edward Island Cancer Treatment Centre, University of Pennsylvania, Abington Hospital, University of California, San Francisco, Melre M. Mahr Cancer Center, University of Miami, and the Intermountain Medical Center.


'/>"/>

Contact: Danielle Servetnick
danielle.servetnick@jefferson.edu
215-955-2238
Thomas Jefferson University
Source:Eurekalert

Related medicine news :

1. Smoking affects allergy-relevant stem cells
2. CNIO researchers describe new functions of cohesin relevant for human disease
3. Possible predictive biomarker for patients who may respond to autophagy inhibitors
4. Office workers carry biomarker of potentially harmful flame retardant, study finds
5. Trio of biomarkers may help identify kidney cancer in early stages
6. Biomarkers may help predict progression of Barretts esophagus to esophageal adenocarcinoma
7. Biomarker may identify neuroblastomas with sensitivity to BET bromodomain inhibitors
8. CT texture analysis of tumors may be a valuable biomarker in localized esophageal cancer
9. DAI provides potential imaging biomarker to indicate brain tumor response to RT
10. Mayo Clinic-led study identifies biomarkers for early risk assessment of acute kidney injury
11. MicroRNA molecule may serve as biomarker, target for brain metastases in breast cancer patients
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/27/2016)... ... June 27, 2016 , ... TopConsumerReviews.com recently awarded their highest five-star ... , Millions of individuals in the United States and Canada wear eyeglasses. Once considered ... both correct vision and make a fashion statement. Even celebrities use glasses as a ...
(Date:6/26/2016)... ... ... Pixel Film Studios Released ProSlice Levels, a Media Slicing Effect Plugin ... whole new perspective by using the title layers in ProSlice Levels to split-up ... Levels contains over 30 Different presets to choose from. FCPX users can ...
(Date:6/26/2016)... ... June 26, 2016 , ... Many women are confused ... endometriosis. These women need a treatment plan to not only alleviate symptoms and ... help for preservation of fertility and ultimately achieving a pregnancy. The specialists at ...
(Date:6/25/2016)... Miami, FL (PRWEB) , ... June 25, 2016 , ... The temporary closing of Bruton ... Plant City Observer , brings up a new, often overlooked aspect of head lice: ... The closing for fumigation is not a common occurrence, but a necessary one in the ...
(Date:6/25/2016)... ... 25, 2016 , ... As a lifelong Southern Californian, Dr. Omkar Marathe earned ... the David Geffen School of Medicine at UCLA. He trained in Internal Medicine at ... fellowship in hematology/oncology at the UCLA-Olive View-Cedars Sinai program where he had the opportunity ...
Breaking Medicine News(10 mins):
(Date:6/24/2016)... 2016 Research and Markets has announced ... Diagnostic Tests" report to their offering. ... The World Market for Companion Diagnostics covers ... Market analysis in the report includes the following: ... Diagnostic Kits) by Region (N. America, EU, ROW), 2015-2020 ...
(Date:6/24/2016)... , Belgium , June 24, ... VNRX), today announced the appointment of Dr. ... Directors as a Non-Executive Director, effective June 23, ... Audit, Compensation and Nominations and Governance Committees.  As ... Futcher will provide independent expertise and strategic counsel ...
(Date:6/23/2016)... Research and Markets has announced the addition of the ... report to their offering. ... failure, it replaces the function of kidneys by removing the ... the treatment helps to keep the patient body,s electrolytes such ... Increasing number of ESRD patients & substantial healthcare expenditure on ...
Breaking Medicine Technology: