People diagnosed with GBM live on average less than 15 months after diagnosis, even after undergoing aggressive surgery, radiation and chemotherapy. But not all GBM cancers are the same, and Kuo's study outlines a new method for sub-typing GBM tumor lines by the proteins they express.
The paper, published early online by the journal Clinical Cancer Research, shows that people who have a subtype of GBM that expresses a particular protein, known for short as CNP, may have a less aggressive subtype of cancer. The survival rate for those with the subtype is sometimes measured in years, not months.
The group isolated tumor lines from five human patients and grew them in the lab, and then looked for biomarkers specific to each line. They later transplanted the tissue into the brains of mice with compromised immune systems.
The researchers also looked for the CNP subtype in samples from 115 human patients and then looked at data on survival rates for those patients. They found that some patients with the protein lived much longer, as long as 10 years after diagnosis.
"We found that this protein was correlated with a less invasive type of cancer in mice, and when we looked at samples of human tumors, remarkably, we also found that the less invasive tumors expressed the CNP protein,'' says Kuo, assistant professor of neurological surgery and human oncology at UW School of Medicine and Public Health.
Kuo says the sub-typing could lead to more accurate prognosis for patients with a GBM diagnosis. Currently, most sub-typing of GBM tumors is based on mRNA, which can be difficult to do. But Kuo says that most hospitals can run assays for proteins, making the test simpler and easier.
In addition, says Michael Zorniak, Kuo's graduate student and lead author on the paper, the new way of typing tumors could lead to designer chemotherapy for GBM.
"As we understand how tumors are differentiated, we can start devising personalized therapies that are targeted to the specific sub-type of cancer,'' he says. "This can help us gain leverage against this difficult cancer."
For example, researchers could create monoclonal antibodies that bind only to the CNP type of cancer, in the way that some subtypes of breast cancer are currently targeted.
The research will be published in the July issue of Clinical Cancer Research, a journal of the American Association for Cancer Research, and is available on-line here: http://clincancerres.aacrjournals.org/content/early/2012/05/15/1078-0432.CCR-12-0339
The research was supported by grants from the National Institutes of Health (T32GM007507, UL1RR025011, RC4AA020476) the National Cancer Institute (HHSN261201000130C, P30CA014520) the Wisconsin Partnership Program, the Center for Stem Cell and Regenerative Medicine, the University of Wisconsin-Madison (Shapiro research scholarship, Graduate School, Department of Neurological Surgery), the HEADRUSH Brain Tumor Research Professorship and the Roger Loff Memorial Fund for GBM Research.
Susan Lampert Smith | EurekAlert!
Study tracks inner workings of the brain with new biosensor
16.08.2018 | Rheinische Friedrich-Wilhelms-Universität Bonn
Foods of the future
15.08.2018 | Georg-August-Universität Göttingen
New design tool automatically creates nanostructure 3D-print templates for user-given colors
Scientists present work at prestigious SIGGRAPH conference
Most of the objects we see are colored by pigments, but using pigments has disadvantages: such colors can fade, industrial pigments are often toxic, and...
Scientists at the University of California, Los Angeles present new research on a curious cosmic phenomenon known as "whistlers" -- very low frequency packets...
Scientists develop first tool to use machine learning methods to compute flow around interactively designable 3D objects. Tool will be presented at this year’s prestigious SIGGRAPH conference.
When engineers or designers want to test the aerodynamic properties of the newly designed shape of a car, airplane, or other object, they would normally model...
Researchers from TU Graz and their industry partners have unveiled a world first: the prototype of a robot-controlled, high-speed combined charging system (CCS) for electric vehicles that enables series charging of cars in various parking positions.
Global demand for electric vehicles is forecast to rise sharply: by 2025, the number of new vehicle registrations is expected to reach 25 million per year....
Proteins must be folded correctly to fulfill their molecular functions in cells. Molecular assistants called chaperones help proteins exploit their inbuilt folding potential and reach the correct three-dimensional structure. Researchers at the Max Planck Institute of Biochemistry (MPIB) have demonstrated that actin, the most abundant protein in higher developed cells, does not have the inbuilt potential to fold and instead requires special assistance to fold into its active state. The chaperone TRiC uses a previously undescribed mechanism to perform actin folding. The study was recently published in the journal Cell.
Actin is the most abundant protein in highly developed cells and has diverse functions in processes like cell stabilization, cell division and muscle...
17.08.2018 | Event News
08.08.2018 | Event News
27.07.2018 | Event News
17.08.2018 | Physics and Astronomy
17.08.2018 | Information Technology
17.08.2018 | Life Sciences