Navigation Links
New portable device enables RNA detection from ultra-small sample in only 20 minutes

A new power-free microfluidic chip developed by researchers at the RIKEN Advanced Science Institute (ASI) enables detection of microRNA from extremely small sample volume in only 20 minutes. By drastically reducing the time and quantity of sample required for detection, the chip lays the groundwork for early-stage point-of-care diagnosis of diseases such as cancer and Alzheimer's.

MicroRNAs (miRNAs) are small, non-coding RNA molecules that regulate gene expression in a wide range of biological processes including development, cell proliferation, differentiation and cell death (apoptosis). Concentration of certain miRNA in body fluids increases with the progression of diseases such as cancer and Alzheimer's, generating hope that these short RNA may hold the key to faster, more accurate diagnosis. Currently available techniques for sensitive miRNA detection, however, require days to reach a diagnosis and involve equipment operated only by trained personnel, making them impractical for use in many situations.

The research team set out to overcome these obstacles by developing a device that enables fast, easy-to-use point-of-care (POC) diagnosis from only a very small sample. In earlier research, the team developed a device in the form of a microchip which uses polydimethylsiloxane (PDMS), a silicone compound known for its air absorption properties, to pull reagents into a capture probe for analysis. This pumping technique simplified design by eliminating the need for external power sources, but the device required a quantity of sample too large for practical applications.

The new device also uses PDMS as an air pump, but drastically improves the method's sensitivity through a signal amplification method called laminar flow-assisted dendritic amplification (LFDA). First, DNA fragments which bond to specific miRNA sequences are fixed to a glass surface along with the miRNA sample to be analyzed, and then sandwiched under a layer of PDMS with channels in it (Figure 1). Emptied of air in a vacuum, the PDMS layer induces a pump effect which pulls amplification reagents, inserted at the channel inlets, into the channels and into contact with the miRNA, creating fluorescence-labeled dendritic structures that grow over time and can be quickly detected.

The sensitivity of this technique drastically reduces the sample quantity required for diagnosis to only 0.25 attomoles (10-18 mole), a thousand-fold improvement over the team's earlier model. Together with its detection time of only 20 minutes, these properties make the self-powered device ideal for use in resource-poor environments, promising portable point-of-care diagnosis for millions in developing countries and around the world.

Contact: RIKEN Global Relations Office

Related biology technology :

1. Portable Spectrometer From Ocean Optics Ideal for Field Applications
2. Researchers develop graphene supercapacitor holding promise for portable electronics
3. Slovenias 1st Total Artificial Heart Patient Discharged from UMC Ljubljana Using the Freedom® Portable Driver
4. All Market Research Predicts the Global Ophthalmology Devices Market Will Reach $18,286.4 Million in 2018
5. New UCLA Engineering research center to revolutionize nanoscale electromagnetic devices
6. Center will create self-powered health monitoring devices
7. Surgical Equipment Market (Surgical Sutures, Surgical Hand Instruments And Electrosurgical Devices) - Global Forecast, Market Share, Size, Growth And Industry Analysis (2010-2017):
8. Global Endoscopy Devices Market is Expected to Reach USD 10.8 Billion in 2017: Transparency Market Research
9. MarketsandMarkets: Global Spine Surgery Devices Market Worth $14.8 Billion by 2017
10. Neonatal and Preterm Infants Enteral Feeding Devices Market is Expected to Reach USD 2.62 Billion Globally by 2018: Transparency Market Research
11. Former FDA Inspectors Train Medical Device, Pharmaceutical Companies How to Prepare for FDA Inspections of Their Quality Systems
Post Your Comments:
Related Image:
New portable device enables RNA detection from ultra-small sample in only 20 minutes
(Date:11/30/2015)... ... , ... Global Stem Cells Group Chile CEO ... America and abroad for the first Iberoamerican Convention on Aesthetic Medicine, Cosmetology and ... will present and discuss new trends in anti-aging stem cell treatments, regenerative medicine ...
(Date:11/30/2015)... ... 30, 2015 , ... Global Stem Cells Group announced the opening of a new ... Arica and Iquique in northern Chile. The facilities are part of GSCG’s expansion efforts in ... and techniques in stem cell medicine to patients from around the world. , The clinics ...
(Date:11/30/2015)... 1, 2015 Partnership includes an ... for the u niversity , s ... treatment s cale - up ... Africa , where licensees based anywhere in the world will ... technology. --> Africa , where licensees based anywhere in the ...
(Date:11/30/2015)... 30, 2015 /PRNewswire/ - Zenith Epigenetics Corp. ("Zenith" or the ... C.W. Wong to its Board of Directors to replace ... with a wealth of experience as co-founder of Resverlogix, with ... --> --> Dr. Wong remarked, ... of directors. Zenith,s long standing expertise in epigenetics and the ...
Breaking Biology Technology:
(Date:10/29/2015)... Oct. 29, 2015  Rubicon Genomics, Inc., today ... distribution of its DNA library preparation products, including ... new ThruPLEX Plasma-seq kit. ThruPLEX Plasma-seq has been ... of NGS libraries for liquid biopsies--the analysis of ... prognostic applications in cancer and other conditions. Eurofins ...
(Date:10/29/2015)... 29, 2015 Today, LifeBEAM , ... with 2XU, a global leader in technical performance ... hat with advanced bio-sensing technology. The hat will ... monitor key biometrics to improve overall training performance. ... two companies will bring together the most advanced technology, ...
(Date:10/27/2015)... SAN JOSE, Calif. , Oct. 27, 2015 /PRNewswire/ ... human interface solutions, today announced that Google has adopted ... family of touch controller solutions to power its newest ... Nexus 6P by Huawei. --> ... ecosystem partners like Google to provide strategic collaboration in ...
Breaking Biology News(10 mins):