33 results about "Cpg island methylation" patented technology

Methods and compositions for assessing CpG island methylation are provided. Specifically, the invention provides an unstructured nucleic acid (UNA) oligonucleotide that base pairs with, i.e., hybridizes to, CpG islands. The subject oligonucleotide may be present in an array, and find use in methods for evaluating methylation of CpG islands in cells. Kits and computer programming for use in practicing the subject methods are also provided.

Provided are methods, reagents, and kits for evaluating cancer, such as prostate cancer, in a subject. Disclosed methods of evaluating cancer include methods of diagnosing cancer, methods of prognosticating cancer and methods of assessing the efficacy of cancer treatment. The methods include assaying a biological sample for methylation of a CpG island associated with specified genes. Provided reagents and kits include primers suitable for amplifying at least a portion of a target CpG islands associated with specified genes.

The invention discloses primers, method and kit for detecting secreted frizzled-related protein (SFRP)2 gene CpG island methylation. The primers include specific primers for amplifying deoxyribonucleic acid (DNA) segments of three CG loci (related to intestinal cancer) on an SFRP2 gene CpG island from a sample nucleic acid, and primers for pyrosequencing the obtained nucleic acid segments. By the primers, the method and the kit disclosed by the invention, the frequency of the SFRP2 gene methylation related to colorectal cancer susceptibility can be detected by adopting a pyrosequencing technique, so as to screen out susceptible people with early colorectal cancer. The primers, the method and the kit are good in specificity, and high in accuracy, and can detect samples at high flux.

The present invention provides new and improved assay for detection of genomic methylated CpG islands. This new method is termed the methylated-CpG island recovery assay (MIRA). In accordance with one embodiment, MIRA comprises the steps of: (a) incubating genomic DNA fragments with a methylated CpG island binding protein in the presence of a binding partner for the binding protein to produce bound DNA containing methylated CpG islands, (b) isolating the bound DNA, and (c) detecting CpG island methylation by gene-specific amplification reactions. In accordance with a preferred embodiment, MIRA comprises the steps of: (a) incubating sonicated genomic DNA with a matrix containing a fusion protein of glutathione S-transferase (GST) and MBD2b (GST-MBD2b) in the presence of MBD3L1 to produce bound DNA containing methylated CpG islands, (b) eluting bound DNA from the matrix, and (c) detecting CpG island methylation by gene-specific amplification reactions.

The invention relates to a kit for morbidity-related tumor suppressor gene epigenetic mutation detection of gastrointestinal neoplasms and application thereof. The kit mainly comprises 25 pairs of gastrointestinal neoplasm morbidity-related tumor suppressor gene promotor region CpG-island amplification and sequencing primers of 9 kinds and a polymerase chain reaction (PCR) amplification reagent. Through a PCR amplification product obtained through the kit, a gene CpG-island methylation state can be analyzed through the methods of methylation specific PCR (MSP), combined bisulphite-restrictionanalysis (COBRA) or bisulfite sequencing PCR (BSP) and the like. The kit has the efficient effect of detecting CpG-island methylation and is used for the morbidity-related tumor suppressor gene epigenetic mutation detection of the gastrointestinal neoplasms.

The present invention relates to gene determining technology and is especially CpG insular methlation test reagent kit and its application for diagnosing tumor and screening demethylation medicine. The reagent kit includes primer, medicine for extracting template DNA, medicine for modifying genome, medicine for purifying DNA, specific MSP-PCR reaction system and negative and positive contrast samples. The present invention utilizes human gene sequences and designs primer based on base mismatch principle, and different gene primer is selected to constitute different reagent kit for detecting different diseases. The present invention may be used widely in the diagnosis of cancer and the screening of relevant medicine.

The technical problem to be solved in the invention is providing a reagent, wherein the reagent is used to detect a methylation of a CpG island which is a cancer suppressor gene starting region in an off-body sample. The technical scheme solving the technical problem in the invention is providing a kit for early warning and screening reagent for liver cancer. The kit comprises a reagent, by which the methylation state of a CpG island that is a gene starting region in a spectrin of a human embryonic can be detected. By using the kid provided in the invention, if the methylation of ELF gene is independently detected, the detection rate can reach 64.70%. And the invention further shares the kit with other detecting reagents for detection of the methylation of the CpG island that is a cancer suppressor gene starting region, and a novel composite detection kit is obtained, of which the detection rate can reach 93.55%. The kit in the invention and a kit of serum AFP400 can be used together in practice to obtain a more accurate effect.

The invention relates to a kit and a method for predicting a hepatocarcinogenesis risk, relating to the technical field of medical in-vitro diagnosis. Particularly, the invention relates to a kit anda method for predicting a hepatocarcinogenesis risk through the CpG island methylation states of single genes or multiple genes in SCT, NFIX, IGF2, ABCG5, GSTO2, SARDH, E2F6, SHANK2, GATA4, OPLAH, NR2F1 and ZFHX3. According to the combined methylation detection of the multiple genes, the sensitivity is greatly improved; the free nucleic acids of saliva, urine, blood and the like are detected, drawing materials from cancer tissue is not required, the detection is noninvasive, and the operation is simple and convenient.

The invention relates to a fecal DNA quantitative methylation specific PCR detection kit and applications thereof. The kit comprises (1) three pairs of amplification primers for the quantitative methylation of colon tumor incidence related CpG-islands in a cancer suppressor gene promoter region and three probes; and (2) a PCR reagent for amplification. A PCR amplification product obtained through the kit can analyze the methylation status of gene CpG-islands through a (quantitative methylation specific PCR, qMSP) PCR method. The kit has an efficient CpG-island methylation detection effect. The kit is applicable to the epigenetic mutation detection of colon tumor incidence related cancer suppressor genes in faeces.

The invention belongs to the field of molecular biology (tumor screening), particularly relates to a technology for carrying out early warning and screening on liver tumor, and aims to solve the technical problem to provide a new choice for early prediction of the liver tumor. The technical scheme of the invention is that a kit for carrying out early warning and screening on liver tumor comprises a primer which is used for amplifying the following genes of an RASSF1A (Ras-association Domain Family 1A) gene of which a promoter is in a CpG island methylation state, a p16 gene, ELF (Embryonic Liver Fodrin), an SOCS (Suppressors of Cytokine Signaling)-3 gene, an SFRP1 (Secreted Frizzled-Related Protein 1) gene and a genome repetitive sequence LINE1 (Long Interspersed Nuclear Elements 1). According to the kit disclosed by the invention, a new effective inspection method is provided for carrying out early warning and screening on early liver tumor and liver cirrhosis; the cost is low, the use is very convenient, the flexibility is high, the specificity is good, and the application prospect is very good.

The invention discloses a construction method and detection method of a trace fragmented DNA methylation detection library. The library construction method of the present invention comprises: linkingfragmented DNA to a methylation linker, wherein all cytosines on the methylation linker are methylated cytosines, the methylation linker includes a long chain and a short chain which are complementaryto form a double chain, and the long chain includes a sequencing platform universal sequence, a single molecule tag sequence, a sample tag sequence and a sequencing primer binding sequence; and the DNA linked with the methylation linker is treated with sodium bisulphate, so that the cytosine C in a non-methylated CpG island is converted into uracil U; and a specific primer and a universal primerare used for PCR amplification enrichment of a target region subjected to sodium bisulfite treatment and containing a CpG site to be detected, so that a library available for on-machine sequencing isobtained. According to the invention, methylation of trace DNA taken through liquid biopsy can be detected, and the CpG island methylation status of multiple regulatory regions of multiple tumor suppressor genes can be quantitatively detected simultaneously.

The invention belongs to the technical field of gene detection, and provides a primer for detecting the methylation level of a promoter area of an MGMT gene and a detection method of the primer. Sequencing is conducted by adopting a pyrosequencing method, the ratio of methylation and non-methylation of a CpG island in a target area is efficiently detected, and the methylation level of the MGMT promoter area is evaluated, so that the purposes of predicating the prognosis of a patient with glioma and making individualized chemotherapy and medication plan are achieved.

The invention which belongs to the technical field of biological detection relates to a method for detecting MP of sheep and provides the methylation state of CpG islands in an MBL (mannan-binding lectin) gene promoter region related with the MP of sheep and an application thereof. The invention also provides a method for detecting the MP of sheep and concretely relates to the methylation detection of the MBL promoter region and the artificial infection verification. The methylation state detection of the MBL gene promoter region of sheep is carried out through selecting a bisulfite sequencing process, the methylation state and the frequency of each CpG locus in a given region can be accurately detected, three substantially differential CpG methylation loci, CpG3, CpG4 and CpG5, related with the MBL level are found, a case that the MBL level after toxic elimination is lower than the MBL level before the toxic elimination is promoted, and the MBL gene promoter region methylation may be a more substantial characteristic of the MBL level reduction of serum. The method allows the MP infection of sheep and susceptible individuals to be sensitively and accurately detected, and provides complete information and scientific bases for the sheep MBL gene promoter region methylation and the MP infection research of sheep.

The invention relates to the fields of molecular biology gene technology and medicine, and specifically discloses a detection method for methylation of an MGMT gene promoter, and a primer group. The methylation degree of a CpG island of the MGMT gene promoter is analyzed, the corresponding primer group is designed, sample genome DNA is subjected to methylation specific PCR (MSP) amplification, andan Ion Torrent semiconductor chip sequencing technology is detected. The detection method has the advantages of large flux, high specificity and sensitivity, stable results, good repeatability and fast detection speed. A fast, reliable and accurate new way is provided for detection, testing, analysis and evaluation of methylation of the MGMT gene promoter, and a theoretical basis is provided forscreening of personalized drugs for sensitive individuals.

The invention relates to the field of gene detection, and discloses a method for detecting gene methylation in glioma. The method comprises the following steps: (1) treating a DNA standard with a restriction enzyme that specifically recognizes and cleaves unmethylated sites; (2) amplifying the digested product by PCR; (3) combining the PCR product with a cationic conjugated polymer to enable the PCR product to undergo fluorescence energy resonance transfer, and respectively detecting fluorescence intensity of the cationic conjugated polymer and fluorescein; (4) calculating E value of gene methylation level in glioma according to the fluorescence intensity; (5) establishing a methylation degree quantitative standardization curve, determining an optimal detection condition, and detecting a glioma DNA sample to be detected under the optimal detection condition; and (6) judging a methylation degree of the glioma DNA sample, and performing combined analysis to evaluate CpG island methylation phenotype of the glioma. The method can realize purposes of detecting the methylation degree of the glioma gene with high sensitivity and low cost.

Provided herein are methods for the diagnosis and treatment of human melanoma and prediction of early disease genesis to metastasis by assessing CpG island methylation or expression level of epigenetically regulated differentially expressed coding or non-coding genes. Methods of treatment of human melanoma by modifying or regulating the same pathways are also provided.

The present invention provides methods to assemble and fuse a full length Abortive Promoter Cassette (APC) to a target nucleic acid during PCR amplification of the target. The linked APC is used to quantify amplicon abundance by the production of RNA Abscripts from the synthetic APC. Stepwise PCR-dependent promoter assembly allows for target-fusion of APCs that are too long to be synthesized as monolithic promoter-primer oligonucleotide reagents.

The invention relates to a method for quantitative PCR detection of maspin gene methylation state and application thereof. The method comprises: firstly, the specific site and sequence information ofCpG island in the upstream regulatory region of maspin gene coding sequence were determined, and 10 pairs of specific primers were designed to detect the methylation status of CpG island in the upstream regulatory region of maspin gene coding sequence. The methylation of maspin was quantitatively detected by using the different length of CpG island in the upstream regulatory region of maspin coding sequence amplified by the primer. CpG island methylation status in breast canc tissue or upstream regulatory region of maspin coding sequence of breast canc metastasis site of breast cancer patientcan be detected by that method, whether breast canc metastasis and malignant degree of the patient have occurred or not can be diagnosed, and the staging classification and treatment of breast cancercan be assisted in clinic; It can also detect the methylation status of CpG island in the upstream regulatory region of maspin coding sequence of normal breast, judge the incidence of breast cancer, metastasis and malignant degree of breast cancer, and assist early screening of breast cancer, so it has a good application prospect.

The invention provides a primer probe composition for detecting the methylation level of DNA (deoxyribonucleic acid) and application of the primer probe composition. Nucleotide sequences of primers comprise at least two of SEQ ID NO:1-2, SEQ ID NO:9-10, SEQ ID NO:15-16 and SEQ ID NO:21-22; and nucleotide sequences of probes comprise at least two of SEQ ID NO:3-8, SEQ ID NO:11-20 and SEQ ID NO:23-28. The primer probe composition is used for detecting CpG island methylation levels of METRNL (meteorin like glial cell differentiation regulator), PDE4D (phosphodiesterase 4D) and MAPT (microtubule associated protein tau) genes, furthermore is used for diagnosing patients suffering from Parkinson's diseases, and is particularly applied to differential diagnosis on patients suffering from early-stage Parkinson's diseases and patients suffering from different subtypes of the Parkinson's diseases. The primer probe composition provided by the invention is low in cost, simple in diagnosis operation and high in practical application value.

The invention provides a primer group for detecting CpO island methylation of p16 gene using methylation specific fluorescence technique. The primer group comprises a pair of oligonucleotide primers and a fluorescence-labeled probe. Said oligonucleotide primer pair has base sequence represented by SEQ ID NO.1 and SEQ ID NO.2. Said fluorescence-labeled probe has base sequence represented by SEQ ID NO.3 or SEQ NO.4.

The invention discloses a specific primer pair and kit for detecting methylation of a septin9 gene according to a high-resolution melting (HRM) curve. The invention firstly protects the specific primer pair, and the specific primer pair consists of a single-stranded DNA molecule as shown in SEQ ID NO:1 and a single-stranded DNA molecule as shown in SEQ ID NO:2. The invention further protects application of the specific primer pair to preparation of the kit. The kit has the functions of diagnosing or assisting in diagnosing colorectal carcinoma, detecting methylation of a promoter region of theseptin9 gene, and detecting CpG island methylation of the promoter region of the septin9 gene. By employing the primer pair provided by the invention, by combining methylation specific PCR with HRM curve, methylation of the septin9 gene is analyzed and detected, and the primer pair has the advantages of being simple and convenient to operate, good in specificity, high in sensitivity and low in cost. The specific primer pair and the kit can be used for early screening or auxiliary diagnosis of patients with the colorectal carcinoma, and have good prospects in health screening and clinical auxiliary diagnosis.