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Patent
Lockheed Martin and Microlab Diagnostics Inc. | Date: 2015-06-19

A microfluidic cartridge can include at least one nucleic acid analysis portion. Each nucleic acid analysis portion can include a fluidic network being configured for micro-liter volumes or less, a sample input at the beginning of the fluidic network, a plurality of vent ports and fluidic channels in the fluidic network configured to effectuate hydrodynamic movement within the fluidic network, an extraction mixture reservoir in the fluidic network, a mixing chamber in the fluidic network, an amplification chamber in the fluidic network, and a separation channel in the fluidic network. A nucleic acid analyzer can be capable of performing nucleic acid analysis using the microfluidic cartridge. A nucleic acid analysis method can be performed using the microfluidic cartridge.


Patent
Microlab Diagnostics Inc. and Lockheed Martin | Date: 2013-02-21

A microfluidic cartridge can include at least one nucleic acid analysis portion. Each nucleic acid analysis portion can include a fluidic network being configured for micro-liter volumes or less, a sample input at the beginning of the fluidic network, a plurality of vent ports and fluidic channels in the fluidic network configured to effectuate hydrodynamic movement within the fluidic network, an extraction mixture reservoir in the fluidic network, a mixing chamber in the fluidic network, an amplification chamber in the fluidic network, and a separation channel in the fluidic network. A nucleic acid analyzer can be capable of performing nucleic acid analysis using the microfluidic cartridge. A nucleic acid analysis method can be performed using the microfluidic cartridge.


Le Roux D.,University of Versailles | Root B.E.,MicroLab Diagnostics Inc | Reedy C.R.,MicroLab Diagnostics Inc | Reedy C.R.,Signature | And 8 more authors.
Analytical Chemistry | Year: 2014

A system that automatically performs the PCR amplification and microchip electrophoretic (ME) separation for rapid forensic short tandem repeat (STR) forensic profiling in a single disposable plastic chip is demonstrated. The microchip subassays were optimized to deliver results comparable to conventional benchtop methods. The microchip process was accomplished in sub-90 min compared with >2.5 h for the conventional approach. An infrared laser with a noncontact temperature sensing system was optimized for a 45 min PCR compared with the conventional 90 min amplification time. The separation conditions were optimized using LPA-co-dihexylacrylamide block copolymers specifically designed for microchip separations to achieve accurate DNA size calling in an effective length of 7 cm in a plastic microchip. This effective separation length is less than half of other reports for integrated STR analysis and allows a compact, inexpensive microchip design. This separation quality was maintained when integrated with microchip PCR. Thirty samples were analyzed conventionally and then compared with data generated by the microfluidic chip system. The microfluidic system allele calling was 100% concordant with the conventional process. This study also investigated allelic ladder consistency over time. The PCR-ME genetic profiles were analyzed using binning palettes generated from two sets of allelic ladders run three and six months apart. Using these binning palettes, no allele calling errors were detected in the 30 samples demonstrating that a microfluidic platform can be highly consistent over long periods of time. © 2014 American Chemical Society. Source


Le Roux D.,University of Versailles | Root B.E.,MicroLab Diagnostics Inc | Hickey J.A.,MicroLab Diagnostics Inc | Scott O.N.,MicroLab Diagnostics Inc | And 6 more authors.
Lab on a Chip - Miniaturisation for Chemistry and Biology | Year: 2014

A fully integrated microfluidic chip for human identification by short tandem repeat (STR) analysis that includes a unique enzymatic liquid preparation of the DNA, microliter non-contact PCR, and a polymer that allows a high-resolution separation within a compact microchip footprint has been developed. A heat-activated enzyme that digests biological materials is employed to generate the target yield of DNA from a buccal swab or FTA paper. The microfluidic architecture meters an aliquot of the liberated DNA and mixes it with the PCR reagents prior to non-contact IR-mediated PCR amplification. The products of PCR amplification are mixed with a sizing standard (ladder) and the 18-plex STR amplicons are separated in an effective length (Leff) of just 7 cm. The development, optimization and integration of each of these processes within the microfluidic chip are described. The device is able to generate genetic profiles in approximately 2 hours that match the profiles from the conventional processes performed using separate conventional instruments. Analysis is performed on a single plastic microchip with a size similar to that of a 96-well plate and only a few mm thick with no pretreatment of any of the functional domains. This is significant advancement in terms of ease of fabrication over glass microdevices or polymeric systems assembled from multiple components. Consequently, this fully integrated sample-in-answer-out microchip is an important step toward generation of a rapid micro-total analysis system for point-of-collection human identification based on genetic analysis. © 2014 the Partner Organisations. Source

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