Navigation Links
Double-therapy approach effectively inhibited brain cancer recurrence
Date:8/24/2010

PHILADELPHIA Researchers from the University of Massachusetts Medical School have identified a novel approach of combining chemotherapy with a targeted therapy to decrease the recurrence of glioblastoma multiforme, the most common and aggressive brain tumor.

"Glioblastomas are horrendous tumors, and new therapies are desperately needed," said lead researcher Alonzo H. Ross, Ph.D., professor of biochemistry and molecular pharmacology at the University of Massachusetts Medical School.

"We found that this double therapy of combining temozolomide with a Notch inhibitor was highly effective at treating tumor cells in culture and in mice," he added.

Results of this study are published in the September issue of Cancer Research, a journal of the American Association for Cancer Research.

Despite treatment with surgery, radiotherapy and chemotherapy, glioblastoma prognosis and survival rates are poor. This may in part be due to the fact that some cells within the tumor cancer stem cells are more resistant to these therapies, eventually allowing the tumor to recur, according to Ross.

"We're both very successful and unsuccessful with cancer therapy; in most cases we can substantially diminish the tumor mass. The problem is that it comes back with vengeance, and is even more resistant and difficult to treat," he said.

Temozolomide is one chemotherapeutic agent that helps patients with glioblastomas live longer; two-year survival rates increase from approximately 10 percent with radiation alone to 25 percent when temozolomide is combined with radiation, according to Ross. Likewise, data have indicated that the Notch signaling pathway is often over-expressed in glioma tissue and tumor cells.

Ross and colleagues evaluated this double-therapy approach of combining temozolomide with a Notch inhibitor in cell culture and in immunodeficient mice to determine if this combination therapy enhances therapy to reduce tumor recurrence.

In both models, the researchers saw that the combination of temozolomide with the Notch inhibitor much more effectively reduced tumor growth and recurrence compared to either agent alone. Either drug used individually only transiently slowed tumor growth.

"Temozolomide is a chemotherapy drug of choice for glioblastomas, and the results of our preclinical study represent a potential promising new approach to combat an extremely difficult tumor," Ross said. "The effect of the two together is very dramatic."

Patrick M. O'Connor, Ph.D., chief scientific officer of Selexagen Therapeutics and editorial board member for Cancer Research, believes this study provides preclinical proof-of-concept evidence that the Notch pathway confers a survival advantage to glioma cells treated with temozolamide.

"These results help lay the groundwork for future clinical research and are yet another stepping stone towards a future era dominated by 'precision therapeutics' designed to specifically target the underlying molecular drivers of cancer growth and spread," said O'Connor.

The researchers are currently investigating the mechanism of action for cell death and hope to move these findings into the clinic.


'/>"/>

Contact: Tara Yates
tara.yates@aacr.org
267-646-0558
American Association for Cancer Research
Source:Eurekalert  

Related medicine news :

1. Survival benefit with high-intensity end-of-life approaches
2. Mountain Home 'Doing the Right Thing Really is the Best Business Approach'
3. ICU Patients Gain From Team Approach to Care
4. Short on specialized intensive care physicians, team-based approach improves ICU outcomes
5. Lumension Unveils Intelligent Application Whitelisting that Operationalizes a Proactive Endpoint Security Approach
6. Secretary Clintons Approach to Development: Good Rhetoric, Little Action?
7. New Approaches to Teen Therapy Bring Results
8. New Drugs, Approaches Offer Hope Against Prostate Cancer
9. New approach to immune cell analysis seen as first step to better distinguish health and disease
10. Reovirus may be a novel approach to prostate cancer treatment
11. Effort aims to spike breast cancer with new approach
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Double-therapy approach effectively inhibited brain cancer recurrence
(Date:6/26/2016)... ... June 27, 2016 , ... Quality metrics are proliferating in cancer care, ... remain in the eye of the beholder, according to experts who offered insights and ... Journal of Managed Care. For the full issue, click here . , For ...
(Date:6/26/2016)... , ... June 26, 2016 , ... Pixel Film Studios ... X. , "Film editors can give their videos a whole new perspective by using ... - CEO of Pixel Film Studios. , ProSlice Levels contains over 30 Different ...
(Date:6/26/2016)... NC (PRWEB) , ... June 26, 2016 , ... Brent Kasmer, a legally blind and ... to be personalized through a fitness app. The fitness app plans to fix the two ... currently only offer a one size fits all type program , They don’t ...
(Date:6/25/2016)... ... June 25, 2016 , ... Experts ... applications at AcademyHealth’s Annual Research Meeting June 26-28, 2016, at the Hynes Convention ... health care topics including advance care planning, healthcare costs and patient and family ...
(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 ...
Breaking Medicine News(10 mins):
(Date:6/24/2016)... -- Dehaier Medical Systems Ltd. (NASDAQ: DHRM ... sells medical devices and wearable sleep respiratory products in ... agreement with Hongyuan Supply Chain Management Co., Ltd. (hereinafter ... 2016, to develop Dehaier,s new Internet medical technology business. ... leverage Hongyuan Supply Chain,s sales platform to reach Dehaier,s ...
(Date:6/24/2016)... , June 24, 2016 ... Market by Type (Standard Pen Needles, Safety Pen Needles), ... (Insulin, GLP-1, Growth Hormone), Mode of Purchase (Retail, Non-Retail) ... MarketsandMarkets, This report studies the market for the forecast ... to reach USD 2.81 Billion by 2021 from USD ...
(Date:6/24/2016)... 24, 2016  Arkis BioSciences, a leading innovator ... more durable cerebrospinal fluid treatments, today announced it ... funding is led by Innova Memphis, followed by ... private investors.  Arkis, new financing will accelerate the ... market release of its in-licensed Endexo® technology. ...
Breaking Medicine Technology: