Navigation Links
Virus might fight brain tumors better if armed with bacterial enzyme, study shows
Date:1/13/2011

COLUMBUS, Ohio New research shows that oncolytic viruses, which are engineered to destroy cancer cells, might be more effective in treating deadly brain tumors if equipped with an enzyme that helps them penetrate the tumor.

The enzyme, called chondroitinase, helps the cancer-killing virus clear its way through the thickets of protein molecules that fill space between cells and impede the virus's movement through the tumor, say researchers at the Ohio State University Comprehensive Cancer Center-Arthur G. James Cancer Hospital and Richard J. Solove Research Institute who conducted the study.

When tested in animals transplanted with a human glioblastoma, the most common and deadly form of brain cancer, the enzyme-armed virus improved survival by 52 percent compared with controls and in some cases eliminated the tumor entirely.

The findings were published online in the journal Clinical Cancer Research.

"Our results show for the first time that an oncolytic virus with this enzyme can spread more effectively through the tumor and underscores the potential of using chondroitinases to enhance the capacity of oncolytic viruses to destroy cancer cells," says study leader Balveen Kaur, associate professor of neurological surgery.

The enzyme is derived from the intestinal bacterium called Proteus vulgaris. The enzyme removes sugar chains that branch from molecules called proteoglycans, which fill the narrow spaces between cells. By cutting away these branches, the enzyme clears a path that helps the virus spread through the tumor.

During this study, Kaur and her collaborators injected human glioblastoma cells under the skin of eight animals, and then, after tumors developed, treated the tumors with the enzyme-armed virus. These mice survived an average of 28 days, with two remaining tumor-free after 80 days. Control animals, treated with a virus that lacked the enzyme, survived 16 days.

In another experiment, mice with human gliobastomas transplanted into the brain survived 32 days versus 21 days for control animals, an improvement of 52 percent. Again, two animals lived more than 80 days and showed no trace of the tumor afterward.

Additional studies showed that the enzyme-laden virus had penetrated tumors in the animals' brain significantly better than the enzyme-free control virus.

"Overall, our results indicate that an oncolytic virus armed with this enzyme can have a significantly greater anticancer effect compared with a similar virus without the enzyme," Kaur says.


'/>"/>

Contact: Darrell E. Ward
Darrell.Ward@osumc.edu
614-293-3737
Ohio State University Medical Center
Source:Eurekalert

Related medicine news :

1. Scientists decode secrets of a very common virus that can cause cancer
2. Flu Viruses Gaining Resistance, Study Confirms
3. Influenza virus strains show increasing drug resistance and ability to spread
4. BUSM researchers show an oncolytic virus switches off cancer cell survival signal
5. Potential new treatment for deadly nipah and hendra viruses identified by Weill Cornell researchers
6. Scientists investigate evolution of new polio virus
7. Haptoglobin as an early serum biomarker of virus-induced type 1 diabetes in rats
8. New Virus Jumps From Monkey to Scientist, Causing Serious Illness
9. A redeeming role for a common virus
10. Childhood Obesity Might Be Linked to Strain of Cold Virus
11. Higher incidence of seizures seen in children with H1N1 virus compared to seasonal flu
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/29/2016)... ... , ... Mercy College is expanding its Graduate Business Programs to the Bronx ... to high demand: Master of Business Administration (MBA), Master of Organizational Leadership (MSOL) and ... School of Business Graduate Program Chair Dr. Ray Manganelli said: “We believe that people ...
(Date:4/29/2016)... ... April 29, 2016 , ... ... announces the addition Onnit brand Alpha BRAIN and New Mood Daily-Stress Formula for ... and mood optimization products to the store is just one more way Shamangelic ...
(Date:4/29/2016)... ... April 29, 2016 , ... Dr. Bernie Siegel, ... seller "LOVE, MEDICINE and MIRACLES") addresses touchy topics related to Death live on ... . Dr. Bernie Siegel, author of a plethora of essential books-to-read for ...
(Date:4/29/2016)... Fla. (PRWEB) , ... April 29, 2016 , ... ... Hospital surgeon reveals that infants born with severe congenital diaphragmatic hernia have better ... is born with congenital diaphragmatic hernia (CDH)—a condition where the diaphragm fails to ...
(Date:4/29/2016)... ... April 29, 2016 , ... ... announces the Gyrociser, an exercise invention which aids in proper muscle development. , ... Cooper, CEO and Creative Director of World Patent Marketing. "Globalization has threatened the ...
Breaking Medicine News(10 mins):
(Date:4/28/2016)... , April 28, 2016 Dr. ... and Ste phen ... ArisGlobal®, a leading provider of cloud-based software solutions for life ... Pharmacovigilance team to bring a wealth of insight to a growing ... pharmacovigilance knowledge. George Phillips joined ArisGlobal in ...
(Date:4/28/2016)... April 28, 2016  ValGenesis, Inc., the ... Solutions (VLMS) today announced that a prominent ... sufferers of chronic kidney failure has selected ... their corporate validation process. The global medical ... solution to manage their validation processes electronically. ...
(Date:4/27/2016)...  Hologic, Inc. (Nasdaq: HOLX ) ... fiscal second quarter ended March 26, 2016.  GAAP ... 41.2%, and non-GAAP diluted EPS of $0.47 increased ... a reported basis, and 6.3% on a constant ... good quarter, highlighted by 14.6% growth in non-GAAP ...
Breaking Medicine Technology: