7 results about "Orientin" patented technology

The invention discloses a method for preparing a high-purity C-glycoside flavone monomer by using secondary reversed-phase semi-preparative chromatography, which comprises the following steps of: performing primary elution on bamboo leaf flavone by using a C18 chromatographic column under the conditions of set column temperature, mobile phase system and elution mode, and monitoring and collecting a primary purified product of a peak corresponding to a target component; carrying out reduced pressure concentration on products of isoorientin and orientin corresponding peaks in the first purification product to remove the solvent, redissolving residues by using an organic solvent II, carrying out second elution on a sample solution obtained by filtering through a microfiltration membrane by using a C18 chromatographic column in a set column temperature, a mobile phase system and an elution mode, and collecting eluent; monitoring and collecting a secondary purified product of a peak corresponding to the target component, and performing vacuum concentration and freeze drying. The bamboo leaf flavonoid product obtained by the method has the purity of not less than 98%, the raw material utilization rate is obviously improved, the separation efficiency is high, and the purification period is greatly shortened.

The application discloses a flavone 6-C-glycosyltransferase mutant for improving the yield of isohyduloside, and provides a mutant protein of GyCGT1, which comprises the following steps: mutating the amino acid residues at positions 7, 8, 9, 18, 205, 258, 280 and 417 of SEQ ID NO: 2, and keeping the amino acid residues at other positions unchanged, so that a protein with the same function is obtained; or the mutant protein of GyCGT1 comprises the following steps: mutating the amino acid residues at positions 7, 9 and 205 of SEQ ID NO: 2, and keeping the amino acid residues at other positions unchanged, so that a protein with the same function is obtained. The glycosyltransferase GyCGT1 mutant is obtained through the method, and the yield of isohyduloside is increased by 8 times in the fermentation of the constructed Escherichia coli recombinant strain in a 50mL shaking flask system, so that the mutant has a good prospect for industrial production application.

The application discloses a method for extracting and separating isoheteroside from Gastrodia elata Bl. The method uses a surfactant aqueous solution as an extraction medium and combines ultrasonic technology to replace an organic solution in a conventional extraction process. Through orthogonal experiment design, main process factors influencing the extraction rate are optimized to determine a relatively optimal process parameter combination. On the basis, isoheteroside is separated and prepared by using a strong ion exchange column gradient elution. The process condition of the application is mild, the extraction time is relatively short, the method has good reproducibility, and the application provides a feasible technical reference for large-scale production of isoheteroside and total flavones.

The invention discloses application of two small molecular substances in regulation and control of weed suppression activity of flavonoid glycoside substances. The invention provides any one of the following applications of a GST activator and a GST inhibitor: (A1) regulating the inhibition activity of wheat flavone-5-O-glucoside to weeds; and (A2) the inhibition activity of the isoorientin on weeds is regulated. According to the invention, the weed suppression effect of the flavonoid glycoside substances can be obviously improved, and the use of chemical pesticides is reduced, so that a novel biological control method is provided for agricultural production, and green agriculture and sustainable development can be realized.

The invention belongs to the technical field of medicines, and particularly relates to application of orientin in preparation of a medicine for treating breast cancer. An MMTV-PyMT breast cancer transgenic mouse is adopted, it is found that the tumor weight inhibition rate of 31.2% is achieved when the PD-L1 monoclonal antibody is independently used, the inhibition rate of orientin single drug treatment is 25.6%, after the PD-L1 monoclonal antibody and the orientin single drug are jointly used, tumor growth can be remarkably inhibited, the tumor inhibition rate reaches 70.0%, and the combined treatment effect is remarkably superior to simple superposition of the drug effects of all the single drugs. In addition, the combined treatment can also effectively promote the infiltration of CD4 + and CD8 + T cells in tumor tissues, and improve the expression level of key anti-tumor immune factors such as granzyme B (GZMB) and interferon-gamma (IFN-gamma).

The present application relates to a kind of methods for constructing transgenic tobacco plants capable of heterologous synthesis flavonoid carbon glycoside substance and its application, belong to genetic engineering technical field.The present application provides EbCHS Gene, EbCHI Gene, PhF2H Gene, PhF3' H Gene and ZmUGT708A6 The application of gene in heterologous synthesis flavonoid carbon glycoside.The present application scheme is by chemical synthesis EbCHS 、 EbCHI , PhF2H 、 PhF3' H And ZmUGT708A6 Flavonoid carbon glycoside synthesis related gene, constructs multi-gene expression vector, is successfully obtained by agrobacterium-mediated transformation transgenic tobacco capable of expressing multiple genes, by determination, the transgenic tobacco can successfully synthesize four kinds of flavonoid carbon glycoside such as vitexin, isovitexin, sophorin and isosophorin, provides technical support for natural medicine efficient preparation and medicinal plant germplasm innovation.

The application provides application of flupirtine and analogues thereof in preparation of a medicament for treating pigmented skin diseases. The analogues of the flupirtine include voruciclib, ostruthin or vitexin. The experimental results of the application show that after melanocytes and melanoma cells are treated by FH and analogues thereof, the melanin production capacity of the cells is significantly reduced, including inhibition of cell proliferation, reduction of melanin content, significant down-regulation of expression levels of key genes MITF, TYR, TYRP1 and the like for melanin production, and reduction of tyrosinase activity. Further in a zebrafish embryo model, we observe strong whitening efficacy and safety of FH. The research results suggest that FH and analogues thereof are expected to become a candidate therapeutic drug for pigmented skin diseases.