Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Getting Cancer Cells to Swallow Poison

10.01.2012
Nanotechnology Researchers Develop New Strategy to Deliver Chemotherapy to Prostate Cancer Cells

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.

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.

Marjorie Montemayor-Quellenberg | EurekAlert!
Further information:
http://www.brighamandwomens.org/

More articles from Health and Medicine:

nachricht Speed data for the brain’s navigation system
06.12.2016 | Deutsches Zentrum für Neurodegenerative Erkrankungen e.V. (DZNE)

nachricht Study suggests possible new target for treating and preventing Alzheimer's
02.12.2016 | Oregon Health & Science University

All articles from Health and Medicine >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Significantly more productivity in USP lasers

In recent years, lasers with ultrashort pulses (USP) down to the femtosecond range have become established on an industrial scale. They could advance some applications with the much-lauded “cold ablation” – if that meant they would then achieve more throughput. A new generation of process engineering that will address this issue in particular will be discussed at the “4th UKP Workshop – Ultrafast Laser Technology” in April 2017.

Even back in the 1990s, scientists were comparing materials processing with nanosecond, picosecond and femtosesecond pulses. The result was surprising:...

Im Focus: Shape matters when light meets atom

Mapping the interaction of a single atom with a single photon may inform design of quantum devices

Have you ever wondered how you see the world? Vision is about photons of light, which are packets of energy, interacting with the atoms or molecules in what...

Im Focus: Novel silicon etching technique crafts 3-D gradient refractive index micro-optics

A multi-institutional research collaboration has created a novel approach for fabricating three-dimensional micro-optics through the shape-defined formation of porous silicon (PSi), with broad impacts in integrated optoelectronics, imaging, and photovoltaics.

Working with colleagues at Stanford and The Dow Chemical Company, researchers at the University of Illinois at Urbana-Champaign fabricated 3-D birefringent...

Im Focus: Quantum Particles Form Droplets

In experiments with magnetic atoms conducted at extremely low temperatures, scientists have demonstrated a unique phase of matter: The atoms form a new type of quantum liquid or quantum droplet state. These so called quantum droplets may preserve their form in absence of external confinement because of quantum effects. The joint team of experimental physicists from Innsbruck and theoretical physicists from Hannover report on their findings in the journal Physical Review X.

“Our Quantum droplets are in the gas phase but they still drop like a rock,” explains experimental physicist Francesca Ferlaino when talking about the...

Im Focus: MADMAX: Max Planck Institute for Physics takes up axion research

The Max Planck Institute for Physics (MPP) is opening up a new research field. A workshop from November 21 - 22, 2016 will mark the start of activities for an innovative axion experiment. Axions are still only purely hypothetical particles. Their detection could solve two fundamental problems in particle physics: What dark matter consists of and why it has not yet been possible to directly observe a CP violation for the strong interaction.

The “MADMAX” project is the MPP’s commitment to axion research. Axions are so far only a theoretical prediction and are difficult to detect: on the one hand,...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

ICTM Conference 2017: Production technology for turbomachine manufacturing of the future

16.11.2016 | Event News

Innovation Day Laser Technology – Laser Additive Manufacturing

01.11.2016 | Event News

#IC2S2: When Social Science meets Computer Science - GESIS will host the IC2S2 conference 2017

14.10.2016 | Event News

 
Latest News

Simple processing technique could cut cost of organic PV and wearable electronics

06.12.2016 | Materials Sciences

3-D printed kidney phantoms aid nuclear medicine dosing calibration

06.12.2016 | Medical Engineering

Robot on demand: Mobile machining of aircraft components with high precision

06.12.2016 | Power and Electrical Engineering

VideoLinks
B2B-VideoLinks
More VideoLinks >>>