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Title: Devices, systems, and methods for conducting assays with improved sensitivity using sedimentation

Patent ·
OSTI ID:1245445

Embodiments of the present invention are directed toward devices, systems, and method for conducting assays using sedimentation. In one example, a method includes layering a mixture on a density medium, subjecting sedimentation particles in the mixture to sedimentation forces to cause the sedimentation particles to move to a detection area through a density medium, and detecting a target analyte in a detection region of the sedimentation channel. In some examples, the sedimentation particles and labeling agent may have like charges to reduce non-specific binding of labeling agent and sedimentation particles. In some examples, the density medium is provided with a separation layer for stabilizing the assay during storage and operation. In some examples, the sedimentation channel may be provided with a generally flat sedimentation chamber for dispersing the particle pellet over a larger surface area.

Research Organization:
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
AC04-94AL85000
Assignee:
Sandia Corporation (Albuquerque, NM)
Patent Number(s):
9,304,129
Application Number:
14/597,601
OSTI ID:
1245445
Resource Relation:
Patent File Date: 2015 Jan 15
Country of Publication:
United States
Language:
English

References (60)

Infrared controlled waxes for liquid handling and storage on a CD-microfluidic platform journal January 2011
Micro freef-low IEF enhanced by active cooling and functionalized gels journal December 2006
Ricin A-Chain Activity on Stem−Loop and Unstructured DNA Substrates journal March 2005
Parallel Nanoliter Microfluidic Analysis System journal June 2007
How Hofmeister ion interactions affect protein stability journal October 1996
Cell-Free DNA—A Marker to Predict Ischemic Brain Damage in a Rat Stroke Experimental Model journal January 2011
Shiga toxin 1 acting on DNA in vitro is a heat-stable enzyme not requiring proteolytic activation journal April 2004
A molecular approach to bioseparations: Protein–protein and protein–salt interactions journal February 2006
Measurement of Circulating Cell-Free DNA Levels by a New Simple Fluorescent Test in Patients With Primary Colorectal Cancer journal February 2011
A rapid direct fluorescent assay for cell-free DNA quantification in biological fluids journal September 2009
Depurination of A4256 in 28 S rRNA by the Ribosome-inactivating Proteins from Barley and Ricin Results in Different Ribosome Conformations journal May 1996
Fully integrated lab-on-a-disc for simultaneous analysis of biochemistry and immunoassay from whole blood journal January 2011
Bead-based microfluidic immunoassays: The next generation journal February 2007
Lab On A CD journal August 2006
Comparison of sample fixation and the use of LDS-751 or anti-CD45 for leukocyte identification in mouse whole blood for flow cytometry journal January 2007
Functional integration of DNA purification and concentration into a real time micro-PCR chip journal January 2011
Light scattering immunoassay book January 1991
Plasma DNA concentration as a predictor of mortality and sepsis in critically ill patients journal April 2006
A B Cell-Based Sensor for Rapid Identification of Pathogens journal July 2003
Read-out concepts for multiplexed bead-based fluorescence immunoassays on centrifugal microfluidic platforms journal February 2006
Cell-Free Plasma DNA as a Predictor of Outcome in Severe Sepsis and Septic Shock journal April 2008
Whole Blood Immunoassay Based on Centrifugal Bead Sedimentation journal March 2011
Characterization of EBV-genome negative “null” and “T” cell lines derived from children with acute lymphoblastic leukemia and leukemic transformed non-Hodgkin lymphoma journal May 1977
Bioinformatic processing to identify single nucleotide polymorphism that potentially affect Ape1 function journal June 2011
A new biodosimetric method: branched DNA-based quantitative detection of B1 DNA in mouse plasma journal August 2010
Circulating DNA: a new diagnostic gold mine? journal October 2002
Multistation, Single Channel Analytical Photometer and Method of Use patent January 1971
Loading Disk for Photometric Analyzer of Rotary Cuvette Type patent July 1973
Separation of solid and liquid components of mixtures patent November 1978
Apparatus and method for measuring white blood cell and platelet concentrations in blood patent May 1979
Heterogeneous binding assay patent April 1987
Method and apparatus for measuring blood constituent counts patent July 1987
Method for separating the cellular components of blood samples patent July 1989
Method of separation employing magnetic particles and second medium patent January 1994
Assay of blood or other biologic samples for target analytes patent June 1997
DNA purification and isolation using magnetic particles patent January 1998
Assay system and method for conducting assays patent March 1999
Centrifugal hematology disposable patent November 2000
Devices and methods for using centripetal acceleration to drive fluid movement in a microfluidics system patent November 2001
Diagnostic tests and kits for Clostridium difficile patent January 2003
Monolithic microfluidic concentrators and mixers patent May 2005
Multi-parameter assays including analysis discs and methods relating thereto patent April 2006
Optical bio-discs and fluidic circuits for analysis of cells and methods relating thereto patent January 2007
Centrifugal force based microfluidic device, microfluidic system including the same, and method of determining home position of the microfluidic device patent July 2010
Devices and Method For Using Centripetal Acceleration To Drive Fluid Movement In A Microfluidics System With On-Board Informatics patent-application December 2001
Class characterization of circulating cancer cells isolated from body fluids and methods of use patent-application July 2002
Reagents for labeling biomolecules having aldehyde or ketone Moieties patent-application September 2002
Multi-parameter assays including analysis discs and methods relating thereto patent-application October 2002
Analytical methods and compositions patent-application November 2002
Method for separating cells patent-application July 2003
Microfluidic particle-analysis systems patent-application April 2004
Centrifuge with removable core for scalable centrifugation patent-application September 2005
Microparticle-based methods and systems and applications thereof patent-application December 2005
Method and Apparatus For Precise Transfer and Manipulation Of Fluids By Centrifugal and Or Capillary Forces patent-application January 2009
Method For Isolating Nucleic Acids Comprising The Use Of Ethylene Glycol Multimers patent-application March 2009
Centrifugal Separation System patent-application August 2009
Method for detecting analytes in a sample patent-application December 2009
Density-based cell detection system patent March 2010
Separation Device patent-application May 2010
Compact disk based platform for separating and detecting immunomagnetic bead labeled cells patent-application June 2010