摘要:
Disclosed is a registry for candidate transfusion donors, which invokes an inventory management policy to create and actively manage lists of candidate donors in order to minimize imbalances between demand and supply across multiple regions and across multiple categories of donors and recipients. Together with a genotyping laboratory, the registry does targeted recruitment of prospective donors who are typed for a set of genetic markers relating to clinically relevant antigens including mutations of Human Erythrocyte Antigens (HEA), genetic variants of Rh, and possibly additional antigens such as HLA and HPA. The registry monitors incoming demand for transfusion antigen genotypes, preferably stratify the demand into a set of categories representing stable subpopulations, and will apply strategies, disclosed herein, to tune the composition of candidate donor lists to match the demand, thereby avoiding excess, and unnecessary, typing of candidate donors.
摘要:
Disclosed is a method of performing simulltaneous PCR amplification of several designated different loci in a sample each including a different target subsequence, using a set of pairs of forward and reverse primers, wherein the pairs are complementary to target subsequences, where different primer pairs are in different reaction chambers and the sample is also present in the reaction chambers, and wherein different primer pairs have different sequences. Different reaction chambers are provided different annealing temperatures, preferably at the same time, such that the annealing temperatures selected enhance annealing conditions for the primer pairs and the target subsequences within the reaction chambers. The method allows PCR to proceed more quickly, which is important to increase throughput in a multiplexed assay, and can be particularly important for HLA-typing in a transplantation setting.
摘要:
Disclosed are methods of multiplexed analysis of oligonucleotides in a sample, including: methods of probe and target “engineering”, as well as methods of assay signal analysis relating to the modulation of the probe-target affinity constant, K by a variety of factors including the elastic properties of target strands and layers of immobilized (“grafted”) probes; and assay methodologies relating to: the tuning of assay signal intensities including dynamic range compression and on-chip signal amplification; the combination of hybridization-mediated and elongation-mediated detection for the quantitative determination of abundance of messages displaying a high degree of sequence similarity, including, for example, the simultaneous determination of the relative expression levels, and identification of the specific class of, untranslated AU-rich subsequences located near the 3′ terminus of mRNA; and a new method of subtractive differential gene expression analysis which requires only a single color label.
摘要:
Disclosed are a method and an algorithm for genetic cross-matching based on the comparison of recipient and donor genotypes - and the underlying combinations of alleles and haplotypes. The method of the invention, rather than focusing on phenotype prediction, instead relies on a comparison of genetic variants identified in the recipient and available donors, whose information preferably will be compiled in a widely available donor registry, to maximize molecular compatibility. The genotypes can be matched based on the weighted clinical significance of a genotypic difference between donor and recipient, such that certain mismatches are more acceptable than others.
摘要:
This invention provides compositions and methods for genetic testing of an organism and for correlating the results of the genetic testing with a unique marker that unambiguously identifies the organism. The marders may be internal markers, such as for example single nucleotide polymorphisms (SNPs), short tandem repeats (STRs), or other sites within a genomic locus. Alternatively, the markers may be external, such that they are separately added to the genetic sample before testing.
摘要:
A method of fragmentation of double stranded DNA is disclosed for use in nucleic acid analysis, notably in the multiplexed analysis of polymorphisms and mutations. The method produces a multiplicity of labeled sense and anti-sense fragments which are not complementary, and thus do not significantly re-anneal under conditions suitable for hybridization analysis (or capture-mediated elongation analysis) of the polymorphisms and/or mutations. The fragments display a desired or predicted length distribution. Cleavage sites can be selected such that the fragments are short, yet long enough to allow discrimination among fragments in an assay, and as a matter of statistical probability, such that the majority of fragments contain at least one labeled nucleotide to facilitate detection.
摘要:
Disclosed are a method and an algorithm for genetic cross-matching based on the comparison of recipient and donor genotypes-and the underlying combinations of alleles and haplotypes. The method of the invention, rather than focusing on phenotype prediction, instead relies on a comparison of genetic variants identified in the recipient and available donors, whose information preferably will be compiled in a widely available donor registry, to maximize molecular compatibility. The genotypes can be matched based on the weighted clinical significance of a genotypic difference between donor and recipient, such that certain mismatches are more acceptable than others.
摘要:
The present invention provides methods and apparatus for the application of a particle array in bioassay format to perform qualitative and/or quantitative molecular interaction analysis between two classes of molecules (an analyte and a binding agent). The methods and apparatus disclosed herein permit the determination of the presence or absence of association, the strength of association, and/or the rate of association and dissociation governing the binding interactions between the binding agents and the analyte molecules. The present invention is especially useful for performing multiplexed (parallel) assays for qualitative and/or quantitative analysis of binding interactions of a number of analyte molecules in a sample.