112 results about "Dna mutation" patented technology

We describe a method for interrogating the content and primary structure of DNA by microarray analyses and to provide comprehensive genetic screening and diagnostics prior to embryo transfer within an IVF setting. We will accomplish this by the following claims: 1) an optimized embryo grading system, 2) a less invasive embryo biopsy with reduced cellular contamination, 3) an optimized DNA amplification protocol for single cells, 4) identify aneuploidy and structural chromosome abnormalities using microarrays, 5) identifying sub-telomeric chromosome rearrangements, 6) a modified DNA fingerprinting protocol, 7) determine imprinting and epigenetic changes in developing embryos, 8) performing genome-wide scans to clarify/diagnose multi-factorial genetic disease and to determine genotype/haplotype patterns that may predict future disease, 9) determining single gene disorders with or without a known DNA mutation, 10) determining mtDNA mutations and/or the combination of mtDNA and genomic (nuclear) DNA aberrations that cause genetic disease.

The present invention discloses a method of detecting a wild-type or mutant B-RAF gene in a body fluid sample from a subject. Also disclosed are methods of using B-RAF as a biomarker for detecting cancer, predicting the outcome of cancer, and monitoring the treatment of cancer or the status of cancer. Furthermore, the invention discloses methods and compositions for detecting a mutant gene with a peptide nucleic acid clamp capable of hybridizing to a wild-type gene and a locked nucleic acid probe capable of hybridizing to a mutant of the gene.

The invention discloses a method for performing multi-target-site amplification library construction on plasma free DNA (deoxyribonucleic acid). The method sequentially comprises steps as follows: 1), tail end repairing and A addition are performed; 2), linker connection is performed: a linker DNA with an annular hairpin structure formed through annealing is added to a DNA fragment with A addition at the tail end in the step 1), so that double-stranded DNA after being combined with annular hairpin linkers on two sides is obtained; when the amount of plasma free DNA extracted and purified in the step 1) is smaller than or equal to 10 ng, a step 3) is performed; otherwise, when the amount of plasma free DNA extracted and purified in the step 1) is larger than 10 ng, a step 4) is performed; step 3), a specific primer I, Phi29 enzyme and a buffer solution are added to DNA with linker addition in the step 2), and linear amplification is performed; step 4), PCR (polymerase chain reaction) amplification is performed: amplification products constitute a free DNA mutation site enrichment sequencing library.

The invention provides a droplet capture chip. The droplet capture chip has the beneficial effects that a plurality of droplet capture chambers are arranged in the droplet capture chip, so that droplets can directly undergo in situ amplification and in situ detection after being captured; droplet generation and droplet capture are integrated on one microfluidic chip, so that convenient and rapid totally integrated automation detection is achieved, the intermediate links can be reduced and the analysis speed can be increased; the imaging information of the droplet capture chip is directly captured with a CCD (charge-coupled device), the CCD is simple and is easy to operate, and the accuracy rate of the obtained result is high; high-sensitivity detection can be achieved by scanning each fixed droplet by laser-induced fluorescence; the droplet capture chip and the microfluidic chip can make up for the deficiency of the detection technology of existing blood circulation DNA mutation, can achieve more sensitive simultaneous detection of multiple mutations and have great significance in increasing the clinical application value of blood circulation DNA in tumor diagnosis and therapy.

The invention relates to the fields of biotechnology, DNA mutation detection technology and bioinformatics, in particular to a gene panel for predicting a new antigen load and detecting genome mutation. Specifically, the invention relates to the gene panel which combines 839 genes and integrates 511 gene fusion events. The gene panel provided by the invention can rapidly, efficiently and accurately predict a new antigen load, and can also detect DNA mutation of multiple sites at one time, so that an optimal individualized treatment drug and scheme can be selected according to genomic characteristics of a patient in a cancer immunotherapy process. In addition, the gene panel provided by the invention can also be used for measuring various types of biomarkers such as SNV, Indel, CNV, gene fusion, MSI, TMB and HLA.

A treatment for systemic DNA mutation diseases accompanied with development of somatic mosaicism and elevation of blood extracellular DNA and, more particularly, to a treatment of diabetes mellitus and atherosclerosis. The inventive method consist from introducing a treatment agent into a circulating blood system of a patient diagnosed with systemic DNA mutation diseases when said treatment agent destroys extracellular DNA in said blood of said patient and wherein said treatment agent used to destroy said extracellular DNA is a DNASE enzyme: said agent might be administered in doses and regimens which sufficient to decrease number average molecular weight of circulating extracellular blood DNA in the blood of said patient;

such decrease of number average molecular weight might be measured by gel electrophoresis of extracellular blood DNA fraction from the blood of said patient. A DNASE enzyme may be further applied in a dose and regime that provide a DNA hydrolytic activity measured in blood plasma exceeding 1.5 Kunitz units per 1 ml of blood plasma for more than 12 hours within a period of 24 hours.

The invention discloses a method for detecting DNA mutation (SNP and DNA methylation) based on graphene sensor. The method comprises the steps that: (1) a graphene molecular device is constructed; (2) a connection molecule is assembled on the surface of the graphene molecular device obtained in the step (1); (3) the designed detection probe is connected on the assembled molecule; and (4) a DNA mutation sample is subjected to electrical signal detection based on the graphene device. According to the invention, DNA mutation detection is realized through electrical signals by using the functionalized graphene molecular device.

The invention relates to a method for enriching a target polynucleotide sequence containing a genetic variation said method comprising: (a) providing two primers targeted to said target polynucleotide sequence; (b) providing a target specific xenonucleic acid clamp oligomer specific for a wildtype polynucleotide sequence; (c) generating multiple amplicons using PCR under specific temperature cycling conditions; and (d) detecting said amplicons.

The invention provides a DNA (Deoxyribonucleic Acid) multi-site directed mutation method which comprises the following steps: designing Class IIS-containing restriction enzyme recognition site and cleavage site according to DNA mutation sites, performing segmented polymerase chain reaction (PCR) amplification, digestion and connecting reaction to obtain a connecting product, directly performing PCR amplification by using the connecting product, and realizing DNA multi-site mutation. The DNA multi-site directed mutation can be rapidly and efficiently realized simultaneously.

The invention provides a bioinformatics analysis method and system for next-generation sequencing DNA mutation detection. The system comprises a bio-information analysis module used for providing basic component units of a biological analysis process and finishing basic functions of bio-information analysis, an intermediate data conversion module used for performing format conversion on data generated by the bio-information analysis module and providing biological analysis data sources and results meeting the requirements, and a running environment configuration module used for configuring relative paths or absolute paths of all input files, output files, configuration files, data files, temporary files, log records, scripts and applications during running of different biological analysis processes and running related environment variables. According to the method and the system, the design is performed only for the DNA mutation detection, namely, a specific bio-information analysis process, so that unnecessary functions are prevented from being introduced, the maintainability and stability of the system are improved, and the flexibility maximization of process establishment is ensured.

The invention provides a preparation method and application of a hydrogel electrode and relates to hydrogel electrodes. The preparation method of the hydrogel electrode comprises the following steps: with graphite powder as a raw material, adding sodium nitrate, sulphuric acid and potassium hypermanganate, mixing and then carrying out reaction until a thick mixture is formed; then adding pure water for the first time, further carrying out reaction, then adding pure water for the second time and stopping reaction, then adding a hydrogen peroxide solution for removing unreacted potassium hypermanganate, washing, centrifuging, and drying, so that graphite oxide solids are obtained, and carrying out ultrasonic treatment on the graphite oxide solids, so that a uniformly dispersed graphene oxide aqueous solution is obtained; mixing the graphene oxide aqueous solution with DNA of milt, then adding the mixture into a centrifugal tube to be heated, and after gel is stably formed, inserting a copper wire into a small hole in the bottom of the centrifugal tube to be fixed, so that a graphene oxide and milt-DNA compounded hydrogel electrode is obtained. The graphene oxide and milt-DNA compounded hydrogel electrode can be used for preparing a graphene oxide and milt-DNA composite hydrogel biosensor and can be applied to detection of mutation of mitochondrial DNA of ovarian cancer.

The invention relates to a detection primer, a detection kit and a detection method of Leber's hereditary optic neuropathy (LHON) mitochondrial DNA gene mutations. The invention, on the basis of Sanger sequencing principle, has the characteristics of being highly sensitive, stable and accurate; four most common pathogenic mutations of LHON mtDNA can be simultaneously detected, so that the problems of an existing LHON mitochondrial DNA mutation detection method, which is low in sensitivity, not strong enough in specificity, capable of causing pollution easily, high in expense and the like, can be solved; therefore, an accurate gene diagnosis method is provided for LHON; and the invention has important implications for genetic counseling and gene therapy of the disease (the LHON).

The invention discloses a method for preparing a gene mutation reference substance. The method disclosed by the invention comprises the following steps: firstly, mixing mutant genome DNA and wild genome DNA according to at least two proportions, measuring the mutation proportion of the prepared reference substance, and calculating a slope and intercept of a fitting straight line; and then preparing the mutation reference substance with any mutation proportion which does not exceed the initial mutation type genome DNA mutation proportion according to the target requirement without verifying themutation proportion of the reference substance obtained by dilution.

The invention belongs to the technical field of biology and particularly relates to a human multi-gene mutation detection kit based on a high-throughput sequencing method and an application thereof. The kit includes a KRAS gene mutation detection primer pair, an EGFR gene mutation detection primer pair and an ALK gene fusion detection primer pair. The kit can simultaneously detect DNA mutation and RNA fusion, is high in sensitivity and low in detection limit, is high in specificity, has good repeatability, and can reach 100% in both accuracy and positive coincident rate.

The invention belongs to the field of nucleic acid detection, and particularly relates to the detection of JAK2 (Janus Kinase 2) gene V617F locus DNA mutation (G1849T) and a test kit and a primer pair used for the detection. The present invention discloses a method for detecting V617F mutation in the JAK2 gene, which comprises (1) performing PCR amplification for the samples to be tested, and (2) performing melting analysis by using a melting analyzer. Further, the present invention also discloses the test kit and the primer pair for the detection method.

The invention discloses a DNA mutation test method in use of nano-Au, relates to a DNA mutation test method, and provides a DNA mutation test method that uses a nano-Au probe. The DNA mutation test method leads wild single-stranded DNA, a probe that is completely complementary with a wild single-stranded DNA sequence and the nano-Au to be mixed, statically placed, added with a sodium chloride solution, and then statically placed, thus obtaining an architecture 1; the DNA mutation test method further leads mutant single-stranded DNA, the probe that is completely complementary with the wild single-stranded DNA sequence and the nano-Au to be mixed, statically placed, added with the sodium chloride solution, and then statically placed, thus obtaining an architecture 2; the sodium chloride solution is added into and evenly mixed with the architecture 1, the ultraviolet-visible absorption spectrum detection is implemented, and an absorbance value that is obtained at a 520nm position is taken as an absorbance value 1; the sodium chloride solution is added into and evenly mixed with the architecture 2, the ultraviolet-visible absorption spectrum detection is implemented, and an absorbance value that is obtained at a 520nm position is taken as an absorbance value 2; when the absorbance values 2 and 1 have marked difference, mutation is determined to exist. The DNA mutation test method does not need any modification of the DNA and the nano-Au, thus simplifying sample processing.

The method to induce monocular DNA directed mutation by atomic force microscope in biotechnology field comprises steps shown follow: (1) preparing mica substrate modified by aminosilane; (2) labelling the end of DNA sample; (3) straightening and preparing the labelled sample; (4) inducing mutation; (5) collecting and separating the induced DNA segment; (6) amplifying monocell; (7) detecting amplification by agarose gel electrophoresis; (8) sequenching sample DNA, and screening the mutated sample. The advantages of this invention include: precise location, high resolution, high efficiency, and simple operation.

The invention belongs to the field of genomics, particularly relating to the deaf relevant mutation 12201 T>C of mitochondrial gene and application. The sequence in which the deaf relevant mutation 12201 T>C of mitochondrial gene of the invention is positioned has the structure of sequence 1. The invention can adopt the deaf relevant mutation of mitochondrial gene to preferentially detect the mitochondria mutational site of deaf patients, which is favourable for eliminating or diagnosing deaf caused by mitochondrial gene mutation; a diagnostic probe prepared by deaf relevant new mutation of the mitochondrial gene, a primer for introducing mutation to cause enzyme cutting site and a kit are adopted to conveniently and quickly screen deaf relevant to mitochondria. The invention provides the reference base for function change caused by gene mutation and provides a favorable chance for disclosing the molecular mechanism of deaf caused by the mitochondria DNA mutation.

Methods for simultaneously surveying the status of a large number of DNA mutation markers are described. In addition, methods for simultaneously determining the methylation status at multiple sites of a collection of genes, in a single assay, are described.