Navigation Links
First noninvasive technique to accurately predict mutations in human brain tumors
Date:4/20/2009

DENVER Donald O'Rourke, MD, Associate Professor of Neurosurgery at the University of Pennsylvania School of Medicine and colleagues, were able to accurately predict the specific genetic mutation that caused brain cancer in a group of patients studied using magnetic resonance imaging (MRI). The researchers presented their findings this week at the American Association for Cancer Research 100th Annual Meeting 2009.

"The field of cancer research has evolved to the point where the identification of the mutations that cause tumors has changed how we treat patients in a number of cancers," says O'Rourke. "Potentially, we believe we have a method that uses MRI to identify a tumor mutation. Historically tumor mutations have been identified in only one way: take the tissue out and examine it using one of two laboratory tests to see if the mutation is present. In this study we've done this identification noninvasively. To my knowledge this is the first demonstration that an MRI, or any imaging technique, can accurately predict the type of mutation of a human tumor."

A particular MRI technique, called relative cerebral blood volume that measures blood flow to the tumor, very highly correlates with the presence of an important mutation in glioblastoma, a type of brain cancer. The mutation occurs in the epidermal growth factor receptor, EGFR, a well known cancer-related protein that helps tumors form their necessary blood vessels. EGFRvIII, the specific mutation the Penn group studied, is the hallmark of a more aggressive form of glioblastoma.

The research team compared MRI readings to tumor tissue samples from 97 glioblastoma patients. They found that patients with higher relative cerebral blood volume as measured by MRI correlates with the EGFRvIII mutation compared to those who did not have the mutation.

Glioblastoma is a variable disease, and clinicians need help to distinguish one form from another. "All of cancer research is evolving to a point where mutations can facilitate care, so a more accurate diagnosis and treatment course can be better planned by identifying the mutational status of the tumor," says O'Rourke.

EGFRvIII is an area of intense interest in the field of cancer, being associated with more aggressive cancers. Having a noninvasive way to identity patients with the EGFRvIII mutation could allow physicians to enroll these patients into trials using drugs that specifically target this mutation. Penn is part of a multicenter trial that is doing just that.

Another implication of having a noninvasive method to track a specific patient group is for following treatment response. "Currently we identify a tumor mutation by removing a tumor, and then we select a particular treatment and evaluate the response with an MRI to see if the tumor is stable or smaller," explains O'Rourke. "With this new method we'll be able to show whether a surrogate of the mutation is changing. EGFRvIII correlates with the elevated blood flow to the tumor and if we put a patient on an effective anti-tumor strategy, that blood flow should reduce. We'd be getting a more biological readout to therapy."

Ongoing work focuses on using advanced MRI to characterize additional mutations in glioblastoma tumors.


'/>"/>

Contact: Karen Kreeger
215-349-5658
University of Pennsylvania School of Medicine
Source:Eurekalert

Related medicine news :

1. Sitting at the Virtual Poker Table: Results From First Ever Epidemiological Study of Actual Internet Poker Gaming Behavior, in Press
2. IPC The Hospitalist Company, Inc. to Report First Quarter 2009 Financial Results
3. Yashoda Cancer Institute Treats First Patient in India Using RapidArc Radiotherapy Technology
4. Response Biomedical Corporation Delivers Record Preliminary Revenues in First Quarter
5. First Annual World Meningitis Day Gaining National Support
6. Lilly Reports Strong First-Quarter 2009 Results
7. First Woman President of the AVMA to Speak at Ross University School of Veterinary Medicine's 2009 Graduation
8. U.S. Venture Investment Lowest in 11 Years, Down 50% to $3.9 Billion in First Quarter
9. ISTA Pharmaceuticals Announces Conference Call and Webcast of First Quarter 2009 Financial Results
10. Pennsylvania Governors Food Safety Council to Hold First Meeting on April 22
11. Caliper Life Sciences First Quarter 2009 Financial Results Conference Call Notice
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:10/13/2017)... ... , ... Global Healthcare Management’s 4th Annual Kids Fun Run brought out many ... event, sponsored by Global Healthcare Management’s CEO, Jon Letko, is aimed at getting kids ... of all ages; it is a non-competitive, non-timed event, which is all about having ...
(Date:10/13/2017)... ... ... “The Journey: From the Mountains to the Mission Field”: the story of ... Philippines. “The Journey: From the Mountains to the Mission Field” is the creation of ... taught all ages and currently teaches a class of ladies at her church, which ...
(Date:10/12/2017)... ... October 12, 2017 , ... Planet Fitness, one of the largest ... its plans to open a flagship location in Covington, LA at 401 N. U.S. ... Go store next to Office Depot in the Holiday Square shopping center. Its location ...
(Date:10/12/2017)... ... October 12, 2017 , ... Asante, a nationally recognized ... have expanded their existing home health joint venture through an agreement, effective October ... a joint venture home health company with Asante, delivering clinically integrated care, for ...
(Date:10/12/2017)... ... 2017 , ... Leading pediatric oncology experts at Children’s National Health System ... Congress of the International Society of Paediatric Oncology (SIOP) Oct. 12-15. Chaired by ... and Blood Disorders at Children’s National, and Stephen P. Hunger, M.D., Chief of ...
Breaking Medicine News(10 mins):
(Date:10/11/2017)... , Oct. 11, 2017  BioPharmX Corporation (NYSE MKT: ... that developed an innovative way to use nonlinear optical ... delivery of new drugs. ... Dermatology Conference will show how researchers from BioPharmX and ... Medical School used a suite of imaging techniques in ...
(Date:10/11/2017)... , Oct. 11, 2017  True Health, ... has amplified its effort during National Breast Cancer ... hereditary cancer risks. ... Clinical Oncology calculated that more than 10 million ... inherited mutations in BRCA1 or BRCA2 and have not ...
(Date:10/10/2017)... ORANGE COUNTY, Calif. , Oct. 10, 2017  NDS received ... Mobile  — a medical-grade battery-powered display stand specifically designed for ... aims to transform technology into a clinical solution to support the ... costs. Innovative Design ... NDS ZeroWire Mobile Wireless Solution ...
Breaking Medicine Technology: