Abstract:
Methods and reagents for detection and analysis of nucleic acids are provided. Certain methods involves an encoding amplification in which a target sequence is associated with probe-binding sequences and optionally with indexing sequences, (2) an optional distribution step in which the product of the encoding amplification is split into multiple aliquots, and (3) a decoding and detection step in which the presence, absence, quantity, or relative amount of the target sequence in the aliquots is determined. The detection step makes use of a multifunctional "self-digesting" molecular probe comprising a primer polynucleotide and a probe oligonucleotide, linked in a 5'-5' orientation.
Abstract:
In some embodiments, an analyte detection system is provided that includes a nanochannel, an electrode arrangement, and a plurality of nanoFET devices disposed in the nanochannel. A plurality of nucleic acid base detection components can be used that include a plurality of nanopores, a plurality of nanochannels, a plurality of hybridization probes, combinations thereof, and the like. According to other embodiments of the present teachings, different coded molecules are hybridized to a target DNA molecule and used to detect the presence of various sequences along the target molecule. A kit including mixtures of coded molecules is also provided. In some embodiments, devices including nanochannels, nanopores, and the like, are used for manipulating movement of DNA molecules, for example, in preparation for a DNA sequencing detection. Nanopore structures and methods of making the same are also provided as are methods of nucleic acid sequencing using the nanopore structures. Surface-modified nanopores are provided as are methods of making them. In some embodiments, surfaced-modified nanopores for slowing the translocation of single stranded DNA (ssDNA) through the nanopore are provided, as are nanopores configured to detect each of a plurality of different bases on an ssDNA strand.
Abstract:
High throughput methods are used that combine the features of using a matrix-type microfluidic device, labeled nucleic acid probes, and homogenous assays to detect and/or quantify nucleic acid analytes. The high throughput methods are capable of detecting nucleic acid analyes with high PCR and probe specificity, producing a low fluorescence background and therefore, a high signal to noise ratio. Additionally, the high throughput methods are capable of detecting low copy number nucleic acid analyte per cell.
Abstract:
Methods of detecting a candidate genetic anomaly such as a candidate duplication in a genome are disclosed. The methods comprise quantifying fluorogenic assays for alleles of a genetic locus from a plurality of individual genomes, identifying ranges of fluorescent intensities indicative of individual genomes homozygous for a first allele, homozygous for a second allele, or heterozygous for both alleles, and identifying individual genomes in which the fluorescence intensities are outside the range of intensities indicative of homozygosity or heterozygosity for the genetic locus.
Abstract:
The invention relates to insulating combinatorial nucleobase oligomers that comprise universal base analogs, where the oligomers are formed by the ligation of two or more oligomer "blocks" via a covalent linkage. Universal bases may serve to insulate specifically binding nucleobases from the effects of the covalent linker region joining two oligomer blocks together, so that the universal bases at least partially negate the T m penalty caused by the covalent linkage, effective to reduce the required minimal length of the oligomer blocks and the combinatorial oligomer. The resulting insulating nucleobase combinatorial oligomers find use in any hybridization-based application, including use as probes and primers. The combinatorial oligomers of the present invention provide advantages over existing combinatorial oligomer systems currently known in the art.
Abstract:
The invention provides a method for detecting a target nucleotide sequence by tagging the nucleotide sequence with a nucleotide tag, providing a probe oligonucleotide with a melting temperature Tm1, comprising a regulatory sequence and a nucleotide tag recognition sequence; incorporating the probe oligonucleotide into the tagged polynucleotide in a polynucleotide amplification reaction, providing a regulatory oligonucleotide with a melting temperature Tm2, comprising a sequence segment that is at least partially complementary to the regulatory sequence, amplifying the tagged target nucleic acid sequence in a PCR amplification reaction using the probe oligonucleotide as a primer, and detecting the amplification product; wherein Tm1 and Tm2 are higher than the annealing temperature associated with the polynucleotide amplification reaction.
Abstract:
The present invention provides amplification-based methods for detection of genotype, mutations, and/or aneuploidy. These methods have broad applicability, but are particularly well-suited to detecting and quantifying target nucleic acids in free fetal DNA present in a maternal bodily fluid sample.
Abstract:
The present teachings provide methods, compositions, and kits for detecting the presence of protein aggregates. In some embodiments, the protein aggregate is treated with a labeled precursor, and the labeled precursor is incorporated into the protein aggregate to form a labeled protein aggregate. The labeled protein aggregate is then measured, thus detecting the presence of the protein aggregate. In some embodiments, the labeled protein aggregate is detected by interaction of labeled precursors, for example by a proximity ligation assay.
Abstract:
The present invention is directed to methods, reagents, and kits for detecting the presence or absence of (or quantifying) target polynucleotide sequences and proteins in at least one sample using encoding and decoding reactions. When a particular target polynucleotide is present in a sample for example, a reaction product is formed in the encoding reaction that includes addressable primer portions. At least one labeling probe and at least one address primer can be employed in the decoding amplification reaction thereby providing a detectable signal value depending upon whether a sequence is present or absent. In some embodiments, the encoding comprises a ligation reaction with linker probes, and single nucleotide polymorphisms (SNPs) are analyzed.
Abstract:
A method for distributing a product to a consumer includes utilizing a computer network to interact with the consumer to obtain information that includes at least one target nucleic acid sequence; providing a forward primer sequence, a reverse primer sequence and a probe sequence having specified characteristics, wherein the forward primer sequence and the reverse primer sequence together define an amplicon sequence, the amplicon lies within the target nucleic acid sequence, and the probe sequence is complementary to a portion of the amplicon sequence; manufacturing at least one assay that includes a forward primer in accordance with the forward primer sequence, a reverse primer in accordance with the reverse primer sequence, and a probe in accordance with the probe sequence; validating one or more of the forward primer, the reverse primer, and the probe; and delivering the manufactured assay to the consumer.