Navigation Links
How normal cells become brain cancers
Date:9/28/2011

Brain tumor specimens taken from neurosurgery cases at the University of California, San Francisco (UCSF) Medical Center has given scientists a new window on the transformation that occurs as healthy brain cells begin to form tumors.

The work may help identify new drugs to target oligodendroglioma, a common type of brain tumor, at its earliest stage, when it is generally most treatable. Any potential drugs identified will have to prove safe and effective in clinical trials, a process that can take several years.

As described in the journal Cancer Cell this month, the UCSF team found that the pool of cells from which oligodendroglioma tumors emerge normally divide "asymmetrically" by splitting into two unequal parts like giving birth to fraternal twins who look different and have distinct fates. When these normal cells transform into cancer cells, they switch gears and begin dividing symmetrically, essentially giving birth to identical twins instead.

"This happens early before the tumor forms, and it may provide a point to intervene in the process of tumor initiation," said Claudia Petritsch, PhD, an assistant professor with the UCSF Brain Tumor Research Center who led the research.

The Brain Tumor Research Center is part of the UCSF Department of Neurological Surgery, which is consistently ranked by U.S. News & World Report as one of the top departments in the world. Its doctors perform more than 1,100 neurosurgeries a year to remove brain tumors, and in the last 30 years, this work has helped to build one of the most extensive brain tumor repositories in the United States, with tissue samples collected from more than 7,800 cases of cancer.

In their research, Petritsch and her colleagues used genetically engineered mice to identify that a protein called NG2 controls this switch, and they are working on ways to target genes that regulate the process as a way of fighting oligodendroglioma and perhaps other brain tumors.

Why Divisions Matter to Cancer

Oligodendrogliomas are unusual among brain tumors because they often respond to chemotherapy drugs. However, the tumor frequently returns in a form that is resistant to chemotherapy and requires repeated surgical removal.

Petritsch and her colleagues first discovered last year that oligodendroglioma tumors derive from a type of progenitor cell called "oligodendrocyte progenitors" that proliferate in the brain throughout life. These progenitors may also play an important role when the brain is injured by multiplying rapidly and helping heal wounds.

The new studies in mice suggest that lacking an injury, these progenitors divide mostly asymmetrically, maintaining an equilibrium of these cells within the brain. Progenitors can also switch gears and divide symmetrically instead. Scientists believe that allows the brain to provide an expanded pool of cells when needed.

Using mouse models of the tumors as well as tissue samples taken from people with the disease, Petritsch and her colleagues showed that before the tumors arise, the cells preemptively make this switch, transforming from dividing asymmetrically to dividing symmetrically.


'/>"/>

Contact: Jason Socrates Bardi
jason.bardi@ucsf.edu
415-502-6397
University of California - San Francisco
Source:Eurekalert  

Related medicine news :

1. Deaf children with cochlear implants report similar quality of life to that of normal-hearing kids
2. Cells of aggressive leukemia hijack normal protein to grow
3. New study finds 70 percent of able-bodied hockey players have abnormal hip and pelvis MRIs
4. Autism Consortium study in Pediatrics shows CMA finds more genetic abnormalities than current tests
5. Mount Sinai researchers are the first to identify heart abnormalities in World Trade Center workers
6. Researchers ID brain abnormalities in children exposed to methamphetamine in utero
7. A new strategy normalizes blood sugars in diabetes
8. Paired drugs kill precancerous colon polyps, spare normal tissue
9. Novel Method Eyed for Normalizing Blood Sugar
10. Body Piercing: Sign of Deviance or Normal Practice?
11. New Heart Health Booster Supports Blood Pressure in the Normal Range*
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
How normal cells become brain cancers
(Date:5/22/2017)... IL (PRWEB) , ... May 22, 2017 , ... ... is part of a larger group investing in InsightRX, an early stage company ... patient’s underlying biological and pharmacological characteristics. Greatpoint Ventures Innovation Fund acted ...
(Date:5/21/2017)... ... May 20, 2017 , ... GetLinked® software continues ... and financial systems. , Dozens of clubs using ABC Financial Services are now ... GetLinked into their club’s accounting system , The latest implementation is Riverside ...
(Date:5/21/2017)... ... May 21, 2017 , ... ... brought together a cross-disciplinary group of scholars, policymakers, and activists wanting to address ... and Equity is the third book from a recent series of from ...
(Date:5/21/2017)... ... ... Following the tragic and widely publicized death of Rory Staunton, 12, from ... follow a protocol to quickly identify and treat the condition. , The mandate ... have saved Rory or anyone else’s life. , Now, five years after the ...
(Date:5/19/2017)... ... 19, 2017 , ... A leader in higher education and ... recruitment efforts for the inaugural cohort of its online Master of Health ... to approach and address the unique nuances healthcare organizations face using a business-minded ...
Breaking Medicine News(10 mins):
(Date:5/12/2017)... , May 12, 2017  The China and ... washing technology that consumes less water, energy and detergent, and features ... first product LaughingU, a shoebox-sized washing machine that washes and sanitizes ... ... Product, LaughingU, is compact, and does not require an external water ...
(Date:5/10/2017)... Global Health Intelligence (GHI), the leading healthcare data analytics ... 2017 ranking of the Best-Equipped Hospitals in Latin America ... GHI,s hospitals database for Latin America , which is ... database covers 86% of the hospitals in Latin ... each institution in key areas such as beds, medical specialties, ...
(Date:5/10/2017)... 2017 CSSi, the global leader in patient ... industry, is proud to announce the launch of its ... features both enriched content and a customized layout that ... company,s already well-established position as the top global patient ... many months of hard work, we are delighted to ...
Breaking Medicine Technology: