Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Researchers develop and test new molecule as a delivery vehicle to image and kill brain tumors

04.08.2011
A single compound with dual function – the ability to deliver a diagnostic and therapeutic agent – may one day be used to enhance the diagnosis, imaging and treatment of brain tumors, according to findings from Virginia Commonwealth University and Virginia Tech.

Glioblastomas are the most common and aggressive brain tumor in humans, with a high rate of relapse. These tumor cells often extend beyond the well-defined tumor margins making it extremely difficult for clinicians and radiologists to visualize with current imaging techniques. Researchers have been investigating enhanced methods of attacking these cells in order to possibly delay or prevent brain tumor relapse.

In a study published in the August issue of the journal Radiology, the research team led by Panos Fatouros, Ph.D., a former professor and chair of the Division of Radiation Physics and Biology in the VCU School of Medicine who retired in 2010, demonstrated that a nanoparticle containing an MRI diagnostic agent can effectively be imaged within the brain tumor and provide radiation therapy in an animal model.

The nanoparticle filled with gadolinium, a sensitive MRI contrast agent for imaging, and coupled with radioactive lutetium 177 to deliver brachytherapy, is known as a theranostic agent – a single compound capable of delivering simultaneously effective treatment and imaging. The lutetium 177 is attached to the outside of the carbon cage of the nanoparticle.

"We believe the clustering properties of this nanoplatform prolong its retention within the tumor, thereby allowing a higher radiation dose to be delivered locally," said Michael Shultz, Ph.D., a research fellow in Fatouros' lab in the Department of Radiology in the VCU School of Medicine.

"This theranostic agent could potentially provide critical data about tumor response to therapy by means of longitudinal imaging without further contrast administration," said Fatouros.

A nanoparticle called a functionalized metallofullerene (fMF), also known as a "buckyball," served as the basis of this work and was created by study collaborator, Harry Dorn, Ph.D., a chemistry professor at Virginia Tech, and his team. In 1999, Dorn and his colleagues were able to encapsulate rare earth metals in the hollow interior of these nanoparticles that can easily be recognized by MRI techniques.

"Although this is a limited animal study, it shows great promise and hopefully this metallofullerene platform will be extended to humans," said Dorn.

Fatouros, who is the corresponding author on the study, Shultz and Dorn collaborated with John D. Wilson, Ph.D., associate professor in the VCU Department of Radiology; Christine E. Fuller, M.D., professor and director of neuropathology and autopsy pathology at VCU; and Jianyuan "Jason" Zhang, a graduate student in chemistry at Virginia Tech from Beijing, China.

The study was funded by grants to Fatouros from the National Institutes of Health's National Cancer Institute, and to Dorn from the National Science Foundation.

EDITOR'S NOTE: A copy of the study is available for reporters by email request from lbrooks@rsna.org.

About VCU and the VCU Medical Center: Virginia Commonwealth University is a major, urban public research university with national and international rankings in sponsored research. Located on two downtown campuses in Richmond, VCU enrolls more than 32,000 students in 211 certificate and degree programs in the arts, sciences and humanities. Sixty-nine of the programs are unique in Virginia, many of them crossing the disciplines of VCU's 13 schools and one college. MCV Hospitals and the health sciences schools of Virginia Commonwealth University compose the VCU Medical Center, one of the nation's leading academic medical centers.

Sathya Abraham | EurekAlert!
Further information:
http://www.vcu.edu

More articles from Health and Medicine:

nachricht Researchers identify cause of hereditary skeletal muscle disorder
22.02.2017 | Klinikum der Universität München

nachricht Second cause of hidden hearing loss identified
20.02.2017 | Michigan Medicine - University of Michigan

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: Breakthrough with a chain of gold atoms

In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport

In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport

Im Focus: DNA repair: a new letter in the cell alphabet

Results reveal how discoveries may be hidden in scientific “blind spots”

Cells need to repair damaged DNA in our genes to prevent the development of cancer and other diseases. Our cells therefore activate and send “repair-proteins”...

Im Focus: Dresdner scientists print tomorrow’s world

The Fraunhofer IWS Dresden and Technische Universität Dresden inaugurated their jointly operated Center for Additive Manufacturing Dresden (AMCD) with a festive ceremony on February 7, 2017. Scientists from various disciplines perform research on materials, additive manufacturing processes and innovative technologies, which build up components in a layer by layer process. This technology opens up new horizons for component design and combinations of functions. For example during fabrication, electrical conductors and sensors are already able to be additively manufactured into components. They provide information about stress conditions of a product during operation.

The 3D-printing technology, or additive manufacturing as it is often called, has long made the step out of scientific research laboratories into industrial...

Im Focus: Mimicking nature's cellular architectures via 3-D printing

Research offers new level of control over the structure of 3-D printed materials

Nature does amazing things with limited design materials. Grass, for example, can support its own weight, resist strong wind loads, and recover after being...

Im Focus: Three Magnetic States for Each Hole

Nanometer-scale magnetic perforated grids could create new possibilities for computing. Together with international colleagues, scientists from the Helmholtz Zentrum Dresden-Rossendorf (HZDR) have shown how a cobalt grid can be reliably programmed at room temperature. In addition they discovered that for every hole ("antidot") three magnetic states can be configured. The results have been published in the journal "Scientific Reports".

Physicist Dr. Rantej Bali from the HZDR, together with scientists from Singapore and Australia, designed a special grid structure in a thin layer of cobalt in...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Booth and panel discussion – The Lindau Nobel Laureate Meetings at the AAAS 2017 Annual Meeting

13.02.2017 | Event News

Complex Loading versus Hidden Reserves

10.02.2017 | Event News

International Conference on Crystal Growth in Freiburg

09.02.2017 | Event News

 
Latest News

Microhotplates for a smart gas sensor

22.02.2017 | Power and Electrical Engineering

Scientists unlock ability to generate new sensory hair cells

22.02.2017 | Life Sciences

Prediction: More gas-giants will be found orbiting Sun-like stars

22.02.2017 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>