Nanotechnology Now

Our NanoNews Digest Sponsors

Heifer International

Wikipedia Affiliate Button

Home > Press > Humble protein, nanoparticles tag-team to kill cancer cells

Images of Ramos cells targeted with nanoparticles. Particles carrying human transferrin (white dots, above image and close-up insert) were able to zero in on, attach to and enter cells (grey spheres).
Images of Ramos cells targeted with nanoparticles. Particles carrying human transferrin (white dots, above image and close-up insert) were able to zero in on, attach to and enter cells (grey spheres).

Abstract:
A normally benign protein found in the human body appears to be able - when paired with nanoparticles - to zero in on and kill certain cancer cells, without having to also load those particles with chemotherapy drugs.

Humble protein, nanoparticles tag-team to kill cancer cells

Chapel Hill, NC | Posted on August 3rd, 2010

The finding could lead to a new strategy for targeted cancer therapies, according to the University of North Carolina at Chapel Hill scientists who made the discovery.

However, they also cautioned that the result raises concerns about unanticipated "off-target" effects when designing nano-delivery agents.

Transferrin, the fourth most abundant protein in human blood, has been used as a tumor-targeting agent for delivering cancer drugs for almost two decades. The protein's receptor is over-expressed on the surface of many rapidly growing cancers cells, so treatments combined with transferrin ligands are able to seek out and bind to them. Nanoparticles infused with transferrin have long been regarded as safe and nontoxic.

Now, UNC researchers have shown that, surprisingly, attaching transferrin to a nanoparticle surface can effectively and selectively target and kill B-cell lymphoma cells, found in an aggressive form of non-Hodgkin's lymphoma. It had been thought that nanoparticles would also need to carry toxic chemotherapy agents to have such an effect.

The discovery was made by a team of researchers led by Joseph DeSimone, Ph.D., Chancellor's Eminent Professor of Chemistry in UNC's College of Arts and Sciences and William R. Kenan Jr. Distinguished Professor of Chemical Engineering at North Carolina State University, along with Jin Wang, Ph.D., and Shaomin Tian, Ph.D., in DeSimone's lab. Their findings appear in this week's online issue of the Journal of the American Chemical Society.

The scientists say the result is an interesting development in the field of nanomedicine, which researchers hope will eventually provide widely accepted alternatives - or replacements - to chemo and radiation treatment. Those therapies, while considered the most effective methods currently available for tackling cancer, also often damage healthy tissues and organs as a side effect.

Using PRINT (Particle Replication in Non-wetting Templates) technology a technique invented in DeSimone's lab that allows scientists to produce nanoparticles with well-defined size and shape the UNC researchers produced biocompatible nanoparticles bonded with human transferrin, and demonstrated that the particles can safely and accurately recognize a broad spectrum of cancers. As well as B-cell lymphoma cells, the particles also effectively targeted non-small cell lung, ovarian, liver and prostate cancer cells.

Generally, the nanoparticles were non-toxic to such cells and should therefore be able to be loaded with standard chemotherapy agents and used to hone in on those cancers.

However, for Ramos cells, an aggressive form of B-cell lymphoma, the transferrin-bonded PRINT nanoparticles not only recognized them but also induced cell death. Meanwhile, free transferrin - which was incubated with Ramos cells but not bound to any nanoparticles - did not kill any Ramos cells, even at high concentrations.

Researchers are carrying out further studies to determine how and why the transferrin-carrying nanoparticles proved toxic to the Ramos cells but not the other tumor types.

"Although this is potentially exciting for the development of entirely new strategies for treating certain types of lymphomas with potentially lower side effects, this study also raises concerns for unanticipated off-target effects when one is designing targeted chemotherapy agents for other types of cancers," said DeSimone. DeSimone is also a member of UNC's Lineberger Comprehensive Cancer Center and the co-principal investigator for the Carolina Center for Cancer Nanotechnology Excellence. He was also recently appointed as an adjunct member at New York's Memorial Sloan-Kettering Cancer Center.

Other UNC coauthors were Robby A. Petros, Ph.D., and Mary E. Napier, Ph.D., from the chemistry department and the Carolina Center for Cancer Nanotechnology Excellence.

The study, "The Complex Role of Multivalency in Nanoparticles Targeting the Transferrin Receptor for Cancer Therapies," was funded by the National Science Foundation; the National Institutes for Health; the Carolina Center for Cancer Nanotechnology Excellence; the William R. Kenan Professorship; Liquidia Technologies; and the North Carolina University Cancer Research Fund, established by the N.C General Assembly to help prevent and treat cancer across the state.

####

For more information, please click here

Contacts:
News Services contact:
Patric Lane
(919) 962-8596

Copyright © University of North Carolina at Chapel Hill

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 News Press

News and information

Oxford Instruments systems now facilitate water purification technology September 27th, 2016

Dr Barbara Armbruster promoted to Worldwide Sales and Marketing Director for XEI Scientific September 27th, 2016

Fighting cancer with sticky nanoparticles September 27th, 2016

Gold nanoparticles conjugated quercetin inhibits epithelial-mesenchymal transition, angiogenesis and invasiveness via EGFR/VEGFR-2 mediated pathway in breast cancer September 27th, 2016

Govt.-Legislation/Regulation/Funding/Policy

Crystalline Fault Lines Provide Pathway for Solar Cell Current: New tomographic AFM imaging technique reveals that microstructural defects, generally thought to be detrimental, actually improve conductivity in cadmium telluride solar cells September 26th, 2016

Tattoo therapy could ease chronic disease: Rice-made nanoparticles tested at Baylor College of Medicine may help control autoimmune diseases September 23rd, 2016

PHENOMEN is a FET-Open Research Project aiming to lay the foundations a new information technology September 19th, 2016

NIST Patents Single-Photon Detector for Potential Encryption and Sensing Apps September 16th, 2016

Possible Futures

Crystalline Fault Lines Provide Pathway for Solar Cell Current: New tomographic AFM imaging technique reveals that microstructural defects, generally thought to be detrimental, actually improve conductivity in cadmium telluride solar cells September 26th, 2016

Researchers at the Catalan Institute of Nanoscience and Nanotechnology show that bending semiconductors generates electricity September 26th, 2016

Chains of nanogold forged with atomic precision September 23rd, 2016

Tattoo therapy could ease chronic disease: Rice-made nanoparticles tested at Baylor College of Medicine may help control autoimmune diseases September 23rd, 2016

Academic/Education

PHENOMEN is a FET-Open Research Project aiming to lay the foundations a new information technology September 19th, 2016

AIM Photonics Announces Release of Process Design Kit (PDK) for Integrated Silicon Photonics Design August 25th, 2016

Nanotech Security Featured by Simon Fraser University: Company's Anti-Counterfeiting Technology Developed With the Help of University's 4D LABS Materials Research Institute August 21st, 2016

W.M. Keck Foundation awards Cal State LA a $375,000 research and education grant August 4th, 2016

Nanomedicine

Fighting cancer with sticky nanoparticles September 27th, 2016

Gold nanoparticles conjugated quercetin inhibits epithelial-mesenchymal transition, angiogenesis and invasiveness via EGFR/VEGFR-2 mediated pathway in breast cancer September 27th, 2016

Tattoo therapy could ease chronic disease: Rice-made nanoparticles tested at Baylor College of Medicine may help control autoimmune diseases September 23rd, 2016

BBI Solutions launches innovative conjugate blocking technology that enhances signal intensity for lateral flow immunoassays September 20th, 2016

Announcements

Oxford Instruments systems now facilitate water purification technology September 27th, 2016

Dr Barbara Armbruster promoted to Worldwide Sales and Marketing Director for XEI Scientific September 27th, 2016

Fighting cancer with sticky nanoparticles September 27th, 2016

Gold nanoparticles conjugated quercetin inhibits epithelial-mesenchymal transition, angiogenesis and invasiveness via EGFR/VEGFR-2 mediated pathway in breast cancer September 27th, 2016

Nanobiotechnology

Fighting cancer with sticky nanoparticles September 27th, 2016

Gold nanoparticles conjugated quercetin inhibits epithelial-mesenchymal transition, angiogenesis and invasiveness via EGFR/VEGFR-2 mediated pathway in breast cancer September 27th, 2016

Tattoo therapy could ease chronic disease: Rice-made nanoparticles tested at Baylor College of Medicine may help control autoimmune diseases September 23rd, 2016

BBI Solutions launches innovative conjugate blocking technology that enhances signal intensity for lateral flow immunoassays September 20th, 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