Nanotechnology Now

Our NanoNews Digest Sponsors


Heifer International

Wikipedia Affiliate Button

Home > Press > Nanostructured Integrated Circuit Detects Type and Severity of Cancer

Abstract:
A team of investigators from the University of Toronto have used nanomaterials to develop an inexpensive microchip sensitive enough to quickly determine the type and severity of a patient's cancer so that the disease can be detected earlier for more effective treatment. Their work, reported in two papers published in the journals ACS Nano and Nature Nanotechnology, could herald an era when inexpensive yet sophisticated molecular diagnostics will become commonplace.

Nanostructured Integrated Circuit Detects Type and Severity of Cancer

Bethesda, MD | Posted on October 29th, 2009

The researchers' new device can readily detect the signature biomarkers that indicate the presence of cancer at the cellular level, even though these biomolecules - genes that indicate aggressive or benign forms of the disease and differentiate subtypes of the cancer - are generally present only at low levels in biological samples. Analysis can be completed in 90 minutes, a significant improvement over the existing diagnostic procedures that generally take days.

"Today, it takes a room filled with computers to evaluate a clinically relevant sample of cancer biomarkers and the results aren't quickly available," said team co-leader Shana Kelley. "Our team was able to measure biomolecules on an electronic chip the size of your fingertip and analyse the sample within half an hour. The instrumentation required for this analysis can be contained within a unit the size of a BlackBerry."

The nanoelectrode device that Kelley, collaborator Edward Sargent, and their students created is able to detect disease-related genes without the use of PCR to amplify low-level DNA. The electrodes, which are the key component of the device, have a novel highly-branched nanostructured shape that can detect attomolar concentrations of DNA. Using arrays of electrodes, each differing in the degree of nanostructured branching, the investigators were able to construct a device capable of sensing DNA molecules over six orders of magnitude, overcoming the dynamic range issue - the ability to detect both common and rare molecules - that has plagued other devices.

The investigators fabricated these devices using a standard microchip production process known as photolithography to create the basic electrode grid needed to measure multiple biomarkers simultaneously, and then used a second technique known as electrodeposition to grow the branched nanostructures on the electrodes, controlling the size of each electrode by varying the time over which electrodeposition occurred. With the electrodes in place, the investigators then coated them with various DNA-binding molecules known as peptide-nucleic acids, or PNAs, that can be designed to bind to a specific gene sequence. When a piece of DNA binds to its complementary DNA or RNA molecule, it triggers a chemical reaction that alters the electrical signal generated by the associated electrode.

Using their device, the investigators analyzed messenger RNA samples from prostate cancer biopsies. Their analysis showed that the device can detect gene fusions characteristic of prostate cancer. More importantly, the device was able to distinguish between gene fusions associated with either fast- or slow-growing forms of prostate cancer.

The paper describing the construction of this nanobiosensor is titled, "Programming the detection limits of biosensors through controlled nanostructuring." An abstract of this paper is available at the journal's Web site.

View abstract here www.nature.com/nnano/journal/vaop/ncurrent/abs/nnano.2009.276.html

The paper detailing the use of the nanobiosensor to detect and characterize cancers is titled, "Direct Profiling of Cancer Biomarkers in Tumor Tissue Using a Multiplexed Nanostructured Microelectrode Integrated Circuit." An abstract of this paper is available at the journal's Web site.

####

About NCI Alliance for Nanotechnology in Cancer
The NCI Alliance for Nanotechnology in Cancer is engaged in efforts to harness the power of nanotechnology to radically change the way we diagnose, treat, and prevent cancer. Through its programs and initiatives, the Alliance is committed to building a community of researchers dedicated to using nanotechnology to advance the fight against cancer.
As part of the Center for Strategic Scientific Initiatives which is led by NCI Deputy Director Dr. Anna Barker, the Alliance for Nanotechnology in Cancer works in concert with other NCI advanced technology initiatives to provide the scientific foundation and team science that is required to transform cancer research and care.

For more information, please click here

Contacts:
NCI Alliance for Nanotechnology in Cancer
Building 31, Room 10A52
31 Center Drive, MSC 2580
Bethesda, MD 20892-2580
(301) 496-1550

Copyright © NCI Alliance for Nanotechnology in Cancer

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

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

Beating the heat a challenge at the nanoscale: Rice University scientists detect thermal boundary that hinders ultracold experiments July 28th, 2016

WSU researchers 'watch' crystal structure change in real time: Breakthrough made possible by new Argonne facility July 27th, 2016

Enhancing molecular imaging with light: New technology platform increases spectroscopic resolution by 4 fold July 27th, 2016

Possible Futures

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

Beating the heat a challenge at the nanoscale: Rice University scientists detect thermal boundary that hinders ultracold experiments July 28th, 2016

Ageing can drive progress: Population ageing is likely to boost medicine, nanotechnology and robotics, but increase political risks July 27th, 2016

Enhancing molecular imaging with light: New technology platform increases spectroscopic resolution by 4 fold July 27th, 2016

Nanomedicine

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

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

The NanoWizard® AFM from JPK is applied for interdisciplinary research at the University of South Australia for applications including smart wound healing and how plants can protect themselves from toxins July 26th, 2016

Accurate design of large icosahedral protein nanocages pushes bioengineering boundaries: Scientists used computational methods to build ten large, two-component, co-assembling icosahedral protein complexes the size of small virus coats July 25th, 2016

Nanoelectronics

Beating the heat a challenge at the nanoscale: Rice University scientists detect thermal boundary that hinders ultracold experiments July 28th, 2016

New nontoxic process promises larger ultrathin sheets of 2-D nanomaterials July 27th, 2016

Ultra-flat circuits will have unique properties: Rice University lab studies 2-D hybrids to see how they differ from common electronics July 25th, 2016

Borrowing from pastry chefs, engineers create nanolayered composites: Method to stack hundreds of nanoscale layers could open new vistas in materials science July 25th, 2016

Announcements

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

Beating the heat a challenge at the nanoscale: Rice University scientists detect thermal boundary that hinders ultracold experiments July 28th, 2016

WSU researchers 'watch' crystal structure change in real time: Breakthrough made possible by new Argonne facility July 27th, 2016

Enhancing molecular imaging with light: New technology platform increases spectroscopic resolution by 4 fold July 27th, 2016

Nanobiotechnology

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

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

Accurate design of large icosahedral protein nanocages pushes bioengineering boundaries: Scientists used computational methods to build ten large, two-component, co-assembling icosahedral protein complexes the size of small virus coats July 25th, 2016

New remote-controlled microrobots for medical operations July 23rd, 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