Wednesday, January 11, 2012

Nanotechnology Now - Press Release: "Getting Cancer Cells to ...

Abstract:
Honing chemotherapy delivery to cancer cells is a challenge for many researchers. Getting the cancer cells to take the chemotherapy "bait" is a greater challenge. But perhaps such a challenge has not been met with greater success than by the nanotechnology research team of Omid Farokhzad, MD, Brigham and Women's Hospital (BWH) Department of Anesthesiology Perioperative and Pain Medicine and Research.

Boston, MA | Posted on January 9th, 2012

In their latest study with researchers from Massachusetts Institute of Technology (MIT) and Massachusetts General Hospital, the BWH team created a drug delivery system that is able to effectively deliver a tremendous amount of chemotherapeutic drugs to prostate cancer cells.

The study is electronically published in the January 3, 2012 issue of ACS Nano.

The process involved is akin to building and equipping a car with the finest features, adding a passenger (in this case the cancer drug), and sending it off to its destination (in this case the cancer cell).

To design the "vehicle," researchers used a selection strategy developed by Farokhzad's team that allowed them to essentially select for ligands (molecules that bind to the cell surface) that could specifically target prostate cancer cells. The researchers then attached nanoparticles containing chemotherapy, in this case docetaxel, to these hand-picked ligands.

To understand Farokhzad's selection strategy, one must understand ligand behavior. While most ligands mainly have the ability to bind to cells, the strategy of Farokhzad and his colleagues allowed them to select specific ligands that were not only able to bind to prostate cancer cells, but also possessed two other important features: 1) they were smart enough to distinguish between cancer and non-cancer cells and 2) they were designed to be swallowed by cancer cells.

"Most ligands are engulfed by cells, but not efficiently," said Farokhzad. "We designed one that is intended to be engulfed."

Moreover, the ability for a ligand to intentionally be engulfed by a cell is crucial in drug delivery since it enables a significant amount of drug to enter the cancer cell, as opposed to remaining outside on the cell surface. This is a more effective method for cancer therapy.

Another important aspect of this drug delivery design is that these ligand-nanoparticle components are able to interact with multiple cancer markers (antigens) on the cell surface. Unlike other drug delivery systems, this makes it versatile and potentially more broadly applicable.

According to the study's lead author, Zeyu Xiao, PhD, a researcher in the BWH Laboratory of Nanomedicine and Biomaterials, current strategies for targeting nanoparticles for cancer therapy rely on combining nanoparticles with ligands that can target well-known cancer markers. Such strategies can be difficult to execute since most cancer cells do not have identifiable cell surface markers to distinguish themselves from normal cells.

"In this study, we developed a unique strategy that enables the nanoparticles to specifically target and efficiently be engulfed into any desired types and sub-types of cancer cells, even if their cancer markers are unknown," said Xiao. "Our strategy simplifies the development process of targeted nanoparticles and broadens their applications in cancer therapy."

This research was supported by the National Institutes of Health, the David Koch-Prostate Cancer Foundation, and the USA Department of Defense Prostate Cancer Research Program.

####

For more information, please click here

Contacts:
Marjorie Montemayor-Quellenberg
617-534-2208

Copyright ? Brigham and Women's Hospital

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

News and information

Iranian Nano-Based Products Presented in 11th Int'l Paint, Resin Coating, Composites Exhibit January 10th, 2012

In the Brain, "ORMOSIL" Nanoparticles Hold Promise as a Potential Vehicle for Drug Delivery: In a new study on fruit flies, the nanoparticles do not harm cells or interfere with the brain's normal function January 10th, 2012

Printed Electronics Europe Exhibition Space Expanded by 41% January 10th, 2012

CRAIC Technologies Introduces Kinetic Microspectroscopy for the 20/20 PV? UV-visible-NIR Microspectrophotometer January 10th, 2012

Nanomedicine

In the Brain, "ORMOSIL" Nanoparticles Hold Promise as a Potential Vehicle for Drug Delivery: In a new study on fruit flies, the nanoparticles do not harm cells or interfere with the brain's normal function January 10th, 2012

Tetragenetics? G-SOME?-Formulated Influenza Vaccine Provides Strong Protection Against H5N1 in Preclinical Efficacy Study January 6th, 2012

Alnylam Files Clinical Trial Application for ALN-TTR02, an RNAi Therapeutic Targeting Transthyretin for the Treatment of Transthyretin-Mediated Amyloidosis ? Company Expects to Initiate Trial in First Half of 2012 with Data in Third Quarter of 2012 ? January 6th, 2012

Reading life?s building blocks: Harvard researchers develop tools to speed DNA sequencing January 6th, 2012

Discoveries

In the Brain, "ORMOSIL" Nanoparticles Hold Promise as a Potential Vehicle for Drug Delivery: In a new study on fruit flies, the nanoparticles do not harm cells or interfere with the brain's normal function January 10th, 2012

ORNL experiments prove nanoscale metallic conductivity in ferroelectrics January 9th, 2012

Future development of smaller and more powerful electronics requires the understanding of 'quantum jamming' physics January 9th, 2012

Evolution of complexity recreated using 'molecular time travel' - Scientists find that small, high-probability mutations can produce complex system January 9th, 2012

Announcements

Iranian Nano-Based Products Presented in 11th Int'l Paint, Resin Coating, Composites Exhibit January 10th, 2012

In the Brain, "ORMOSIL" Nanoparticles Hold Promise as a Potential Vehicle for Drug Delivery: In a new study on fruit flies, the nanoparticles do not harm cells or interfere with the brain's normal function January 10th, 2012

Printed Electronics Europe Exhibition Space Expanded by 41% January 10th, 2012

CRAIC Technologies Introduces Kinetic Microspectroscopy for the 20/20 PV? UV-visible-NIR Microspectrophotometer January 10th, 2012

Research partnerships

Future development of smaller and more powerful electronics requires the understanding of 'quantum jamming' physics January 9th, 2012

Scientists solve mystery of colorful armchair nanotubes: Rice University researchers tag excitons in search for hues' clues January 9th, 2012

New form of graphene could prevent electronics from overheating and revolutionize thermal management January 9th, 2012

Keeping electronics cool: Findings on modified form of graphene could have impacts in managing heat dissipation in everything from electronics to photovoltaic solar cells to radars January 9th, 2012

Source: http://www.nanotech-now.com/news.cgi?story_id=44239

new years eve times square 2012 new years eve ball drop prosperity 2012 holidays phish yellow cab japan earthquake

No comments:

Post a Comment

Note: Only a member of this blog may post a comment.