New device to efficiently identify and ‘grab’ circulating cancer cellsMarch 8th, 2011 - 5:08 pm ICT by ANI
Washington, March 08 (ANI): A UCLA research team has developed an innovative device based on Velcro-like nanoscale technology to efficiently identify and ‘grab’ circulating tumor cells, or CTCs, in the blood, which play a crucial role in cancer metastasis.
In a study, the UCLA researchers announce the successful demonstration of this “nano-Velcro” technology, which they engineered into a 2.5-by-5-centimeter microfluidic chip. This second-generation CTC-capture technology was shown to be capable of highly efficient enrichment of rare CTCs captured in blood samples collected from prostate cancer patients.
The new approach could be even faster and cheaper than existing methods, and it captures a greater number of CTCs, the researchers said.
The new CTC enrichment technology is based on the research team’s earlier development of ‘fly-paper’ technology, outlined in a 2009 paper in Angewandte Chemie. The technology involves a nanopillar-covered silicon chip whose “stickiness” resulted from the interaction between the nanopillars and nanostructures on CTCs known as microvilli, creating an effect much like the top and bottom of Velcro.
The new, second-generation device adds an overlaid microfluidic channel to create a fluid flow path that increases mixing. In addition to the Velcro-like effect from the nanopillars, the mixing produced by the microfluidic channel’s architecture causes the CTCs to have greater contact with the nanopillar-covered floor, further enhancing the device’s efficiency.
“The device features high flow of the blood samples, which travel at increased (lightning) speed,” said senior study author Dr. Hsian-Rong Tseng, an associate professor of molecular and medical pharmacology at the UCLA Crump Institute for Molecular Imaging and the California NanoSystems Institute at UCLA.
“The cells bounce up and down inside the channel and get slammed against the surface and get caught,” explained Dr. Clifton Shen, another study author.
The advantages of the new device are significant. The CTC-capture rate is much higher, and the device is easier to handle than its first-generation counterpart. It also features a more user-friendly, semi-automated interface that improves upon the earlier device’s purely manual operation.
The study has been featured on the cover of the journal Angewandte Chemie. (ANI)
- 'Fly paper' to capture circulating cancer cells created - Nov 19, 2009
- Now, a disposable device to identify aggressive breast cancers - Sep 29, 2010
- New ultra-sensitive device sniffs out toxic metals - Sep 13, 2012
- Microsponges from seaweed may help diagnose diseases quickly - Feb 10, 2011
- Growing nanolasers on silicon paves way for on-chip photonics - Feb 07, 2011
- Circulating tumour cells in blood up death risk in early-stage breast cancer patients - Dec 11, 2010
- Carbon nanotube device can rapidly diagnose cancer, HIV - Mar 30, 2011
- Now, a quick and affordable microfluidic HIV test - Jul 17, 2010
- From IIT-M, nano-scale device to detect big explosives - Aug 28, 2012
- Now, microfluidic integrated circuit to enable home diagnostic tests - Apr 23, 2010
- New system uses sunlight to make clean water from waste effluents - Jan 12, 2011
- Harry Potter's idea inspires rapid blood test - May 07, 2012
- A biosensor to detect drugs! - Jun 03, 2012
- New electronic sensor 'better than sniffer dogs' at detecting bombs - Nov 11, 2010
- Scientists come a step closer to creating lab-on-a-chip devices - Feb 17, 2010
Tags: , , , , , , , , , , , , , , , , , , ,