Navigation Links
Nano drug crosses blood-brain tumor barrier, targets brain-tumor cells and blood vessels
Date:7/17/2013

  • The blood-brain barrier protects the brain from poisons but also prevents drugs from reaching brain tumors; innovative new treatments are needed.
  • This laboratory study shows that a nanotechnology drug called SapC-DOPS crosses that barrier and targets brain-tumor cells and retards growth of tumor blood vessels.
  • The findings also show how the agent targets tumor cells and recommend its further development as a novel treatment for glioblastoma.

COLUMBUS, Ohio An experimental drug in early development for aggressive brain tumors can cross the blood-brain tumor barrier and kill tumor cells and block the growth of tumor blood vessels, according to a study led by researchers at the Ohio State University Comprehensive Cancer Center Arthur G. James Cancer Hospital and Richard J. Solove Research Institute (OSUCCC James).

The laboratory and animal study also shows how the agent, called SapC-DOPS, targets tumor cells and blood vessels. The findings support further development of the drug as a novel treatment for brain tumors.

Glioblastoma multiforme is the most common and aggressive form of brain cancer, with a median survival of about 15 months. A major obstacle to improving treatment for the 3,470 cases of the disease expected in the United States this year is the blood-brain barrier, the name given to the tight fit of cells that make up the blood vessels in the brain. That barrier protects the brain from toxins in the blood but also keeps drugs in the bloodstream from reaching brain tumors.

"Few drugs have the capacity to cross the tumor blood-brain barrier and specifically target tumor cells," says principal investigator Balveen Kaur, PhD, associate professor of neurological surgery and chief of the Dardinger Laboratory of Neurosciences at the OSUCCC James. "Our preclinical study indicates that SapC-DOPS does both and inhibits the growth of new tumor blood vessels, suggesting that this agent could one day be an important treatment for glioblastoma and other solid tumors."

The findings were published in a recent issue of the journal Molecular Therapy.

SapC-DOPS (saposin-C dioleoylphosphatidylserine), is a nanovesicle drug that has shown activity in glioblastoma, pancreatic cancer and other solid tumors in preclinical studies. The nanovesicles fuse with tumor cells, causing them to self-destruct by apoptosis.

Key findings of the study, which used two brain-tumor models, include:

  • SapC-DOPS binds with exposed patches of the phospholipid phosphatidylserine (PtdSer) on the surface of tumor cells;
  • Blocking PtdSer on cells inhibited tumor targeting;
  • SapC-DOPS strongly inhibited brain-tumor blood-vessel growth in cell and animal models, probably because these cells also have high levels of exposed PtdSer.
  • Hypoxic cells were sensitized to killing by SapC-DOPS.

"Based on our findings, we speculate that SapC-DOPS could have a synergistic effect when combined with chemotherapy or radiation therapy, both of which are known to increase the levels of exposed PtdSer on cancer cells," Kaur says.


'/>"/>

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

Related medicine news :

1. A new European network crosses the boundaries for excellence in language and perception research
2. E-Store India Crosses the 1-million Mark for Number of Registered Online Buyers
3. Nano-devices that cross blood-brain barrier open door to treatment of cerebral palsy
4. Improved Stem Cell Line May Avoid Tumor Risk: Study
5. Normalizing tumor blood vessels improves delivery of only the smallest nanomedicines
6. Dental X-Rays May Be Linked to Benign Brain Tumors
7. Live imaging shows response to cancer drugs can be boosted by altering tumor microenvironment
8. Brain Tumor Vaccine Shows Promise in Early Trial
9. Kidney Cancer Patients Fare Better With Tumor Removal Only
10. IBN discovers human neural stem cells with tumor targeting ability
11. Protein prevents DNA damage in the developing brain and might serve as a tumor suppressor
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:2/12/2016)... ... February 12, 2016 , ... A lot has been reported about the fitness ... access to health and wellness resources most Americans could ever dream of having at ... a schedule as frenetic as the U.S. President. , In honor of President’s ...
(Date:2/12/2016)... ... ... The Central Coast Autism Spectrum Center (CCASC) invites teens ages 11-18 to its annual Winter ... teens with and without special needs to gather in a safe and supportive environment. Volunteers ... will take place on Saturday, Feb. 13 from 7 to 9:30 p.m. at Elks Lodge, ...
(Date:2/12/2016)... , ... February 12, 2016 , ... Yisrayl Hawkins, Pastor ... article this week that uncovers what he says are the real facts surrounding all ... the Bible from parents and Sunday school teachers, and Yisrayl says there is more ...
(Date:2/12/2016)... ... February 12, 2016 , ... Planet Future ... new cartoon style themes are great for showcasing pictures, videos as well as text ... titles like introductions, lower thirds, transitions and a beautiful frame overlay. Pixel Film Studios ...
(Date:2/12/2016)... ... ... Dignity Health named Dr. Scott Bingham the Facility Medical Director of the ... licensed under Dignity Health Arizona General Hospital , which opened last year in ... our new freestanding emergency room delivers the highest quality care to Mesa and the ...
Breaking Medicine News(10 mins):
(Date:2/11/2016)... SAN FRANCISCO , Feb. 11, 2016  Kindred ... focused on saving and improving the lives of pets, ... Technical Section of the New Animal Drug Application (NADA) ... the pivotal field study (KB0120) of Zimeta for the ... by the Company. --> ...
(Date:2/11/2016)... N.Y. , Feb. 11, 2016  Governor Andrew ... that will create 1,400 jobs throughout Western ... a partnership with the SUNY Polytechnic Institute, includes a ... Conventus Building in Buffalo , as ... foot manufacturing facility in Dunkirk . ...
(Date:2/11/2016)... 11, 2016 Potrero Medical, Inc., the developer of ... the appointment of George M. Rapier, III , MD, ... TX , WellMed is one of the nation,s largest ... HMO members in Texas and ... of his own internal medicine practice, he has been instrumental ...
Breaking Medicine Technology: