Nanotechnology Now

Our NanoNews Digest Sponsors


Heifer International

Wikipedia Affiliate Button

Home > Press > Biologically Targeted Nanoparticles May Boost Radiation Therapy Effects

Abstract:
Making a tumor more sensitive to radiotherapy is a primary goal of combining chemo and radiation therapy to treat many types of cancer, but with the chemotherapy drugs come unwanted side effects. Now, investigators from the University of North Carolina report what they believe is the first pre-clinical demonstration of the potential of molecularly targeted nanoparticles as a promising new class of agents that can improve chemoradiotherapy treatment.

Biologically Targeted Nanoparticles May Boost Radiation Therapy Effects

Bethesda, MD | Posted on November 17th, 2011

The nanoparticles target tumor cells, the investigators explain, thus sparing normal tissue and avoiding the systemic side effects often associated with chemotherapy drugs. The researchers, led by Andrew Wang, a member of the Carolina Center for Cancer Nanotechnology Excellence, reported their findings in the journal ACS Nano.

The team used docetaxel, a drug used to treat head and neck cancers. As Wang explained, "docetaxel is a proven drug used in chemoradiotherapy, but it leads to many unwanted side effects on normal organs. The nanoparticle formulation of docetaxel, on the other hand, concentrates in tumors, which in turn leads to improved efficacy and fewer side effects."

To accomplish this feat, the investigators developed a biodegradable polymeric lipid nanoparticle formulation of docetaxel that targets the folate receptor, overexpressed in head and neck and other tumors. Folate is a water-soluble form of Vitamin B9. "We found that the folate-targeted nanoparticle was more effective than the docetaxel or non-targeted nanoparticle formulations of docetaxel," said Wang. "We also learned that timing of the radiation following administration of the nanoparticle formulation is critical."

This last finding came about when the investigators first tested their nanoparticle formulation on tumor cells and observed that the targeted nanoparticle was less effective than free docetaxel as a radiosensitizer. Further investigation found that the timing of radiation after dosing was critical, with the two formulations displaying equal efficacy if radiation was postponed for 24 hours after dosing with the nanoparticle, compared to the one-hour delay used with free docetaxel. When tested in animals, Wang and his collaborators found that a 12-hour delay between the time of dosing and the time of irradiation produced the best results.

This information, he said, will be helpful in the clinical translation of nanoparticle drugs in chemoradiation. His group is currently evaluating two commercial formulations of nanoparticle taxane drugs in preparation for early phase clinical trials in the near future.

####

About The National Cancer Institute (NCI)
To help meet the goal of reducing the burden of cancer, the National Cancer Institute (NCI), part of the National Institutes of Health, is engaged in efforts to harness the power of nanotechnology to radically change the way we diagnose, treat and prevent cancer.

The NCI Alliance for Nanotechnology in Cancer is a comprehensive, systematized initiative encompassing the public and private sectors, designed to accelerate the application of the best capabilities of nanotechnology to cancer.

Currently, scientists are limited in their ability to turn promising molecular discoveries into benefits for cancer patients. Nanotechnology can provide the technical power and tools that will enable those developing new diagnostics, therapeutics, and preventives to keep pace with today’s explosion in knowledge.

For more information, please click here

Contacts:
National Cancer Institute
Office of Technology & Industrial Relations
ATTN: NCI Alliance for Nanotechnology in Cancer
Building 31, Room 10A49
31 Center Drive , MSC 2580
Bethesda , MD 20892-2580

Copyright © The National Cancer Institute (NCI)

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related Links

View abstract - "Folate-Targeted Polymeric Nanoparticle Formulation of Docetaxel Is an Effective Molecularly Targeted Radiosensitizer with Efficacy Dependent on the Timing of Radiotherapy."

Related News Press

News and information

Scientists find a way of acquiring graphene-like films from salts to boost nanoelectronics: Physicists use supercomputers to find a way of making 'imitation graphene' from salt July 30th, 2016

Vortex laser offers hope for Moore's Law: The optics advancement may solve an approaching data bottleneck by helping to boost computing power and information transfer rates tenfold July 30th, 2016

New method for making green LEDs enhances their efficiency and brightness July 30th, 2016

A new type of quantum bits July 29th, 2016

Govt.-Legislation/Regulation/Funding/Policy

Vortex laser offers hope for Moore's Law: The optics advancement may solve an approaching data bottleneck by helping to boost computing power and information transfer rates tenfold July 30th, 2016

A new type of quantum bits July 29th, 2016

Thomas Swan and NGI announce unique partnership July 28th, 2016

Penn team uses nanoparticles to break up plaque and prevent cavities July 28th, 2016

Nanomedicine

Scientists change properties of zeolites to improve hemodialysis July 29th, 2016

Pixel-array quantum cascade detector paves the way for portable thermal imaging devices: Research team from TU-Wien Center for Micro- and Nanostructures have developed a new 'cooler' sensing instrument thereby increasing energy-efficiency and enhancing mobility for diagnostic tes July 28th, 2016

Starpharma initiates new DEP™ drug delivery program with AstraZeneca July 27th, 2016

Scientists test nanoparticle drug delivery in dogs with osteosarcoma July 26th, 2016

Discoveries

Scientists find a way of acquiring graphene-like films from salts to boost nanoelectronics: Physicists use supercomputers to find a way of making 'imitation graphene' from salt July 30th, 2016

Vortex laser offers hope for Moore's Law: The optics advancement may solve an approaching data bottleneck by helping to boost computing power and information transfer rates tenfold July 30th, 2016

New method for making green LEDs enhances their efficiency and brightness July 30th, 2016

A new type of quantum bits July 29th, 2016

Announcements

Scientists find a way of acquiring graphene-like films from salts to boost nanoelectronics: Physicists use supercomputers to find a way of making 'imitation graphene' from salt July 30th, 2016

Vortex laser offers hope for Moore's Law: The optics advancement may solve an approaching data bottleneck by helping to boost computing power and information transfer rates tenfold July 30th, 2016

New method for making green LEDs enhances their efficiency and brightness July 30th, 2016

A new type of quantum bits July 29th, 2016

NanoNews-Digest
The latest news from around the world, FREE




  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoTech-Transfer
University Technology Transfer & Patents
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More











ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project







Car Brands
Buy website traffic