8 results about "Methylation" patented technology

The present invention relates to methods and devices for identifying and quantifying, including low abundance, nucleotide base mutations, insertions, deletions, translocations, splice variants, miRNA variants, alternative transcripts, alternative start sites, alternative coding sequences, alternative non-coding sequences, alternative splicings, exon insertions, exon deletions, intron insertions, or other rearrangement at the genome level and/or methylated nucleotide bases.

The invention discloses a phenol ortho-methylation catalyst and a preparation method thereof. The catalyst is an alkaline Fe/Mg compound oxide, wherein, the mol ratio of Fe to Mg is 1: (0.1-2). The preparation method comprises the following steps: mixing and dissolving soluble malysite and soluble magnesium salts into alcohols solvent according to a required proportion to prepare a solution A; adding polyethyleneglycol (PEG) into strong aqua ammonia to prepare a solution B; slowly mixing the solution A and the solution B in a cocurrent flow mode under the condition of normal temperature and ultrasound, and then going on with the ultrasound for 30 minutes; filtering, washing, drying and baking the obtained precipitation; porphyrizing the baked solid and repulverizing the solid into 10-20 mesh finely ground particles after tabletting; the finely ground particles are the catalyst. The catalyst has the advantages of high activity at low temperature, simple preparation, innocuity, good stability, high selectivity of ortho position, particularly high selectivity of orthocresol and few by-products.

The invention provides for the use of sulfur nucleophiles in analyzing methylated DNA and novel sulfur nucleophiles suitable for such us.

A composition and method of increasing the bioavailability of curcumin is provided. A synergistic combination of excipient polymers provides increased bioavailability thereby increasing the plasma concentration of curcumin and its metabolite curcumin O-glucuronide. The curcumin pharmaceutical compositions are suitable for modifying DNA methylation and treating diseases such as cancer.

Provided in the present invention are a molecule for biomarking cancers and a test composition for screening cancers and a detection method thereof comprising designing a number of oligonucleotide primers or probes by analyzing specimens for methylated regions of targeted genes PAX1, ZNF582, SOX1 and NKX6-1 in physical examination, and then using the oligonucleotide probes to detect whether methylation exists in the target genes, and further judge the likelihood of the occurrence of cancer. The detection methods for methylation status include methylation-specific PCR, (MSP), quantitative methylation-specific PCR (QMSP), bisulfate sequencing (BS), microarrays, mass spectrometer, denaturing high-performance liquid chromatography (DHPLC), pyrosequencing, and enzyme-linked immunosorbent assay (ELISA).

The invention relates to a synthetic method for bifenazate. The method comprises the following specific synthetic sections: step 1, performing nitration: mixing a 4-hydroxybiphenyl solution and a toluene solution under stirring for a reaction, and adding a HNO3 solution dropwise for a reaction to obtain a nitration reaction solution; step 2, performing methylation: mixing the nitration reaction solution and anhydrous sodium carbonate powder for a reaction, and adding a dimethyl carbonate solution dropwise for a reaction to obtain a methylation reaction solution; step 3, performing hydrogenation: throwing the methylation reaction solution, hydrogen gas, and Raney nickel into a reaction kettle for a reaction to obtain a hydrogenation reaction liquid; step 4, performing hydrazination: performing a primary hydrazination reaction, performing a secondary hydrazination reaction, performing filter pressing, performing a tertiary hydrazination reaction, and performing secondary filter pressingto obtain a condensation reaction liquid; step 5, performing condensation: mixing a third hydrazine compound, an ethyl acetate solution and an isopropyl chloroformate solution for a reaction to obtaina bifenazate mixed liquid; and step 6, performing purification: performing desolvation, performing crystallization, performing centrifugation, performing washing, performing secondary centrifugation,and performing drying to obtain the finished bifenazate. The method provided by the invention has the effect of improving purity of the bifenazate product.