293 results about "Squalene" patented technology

The present invention relates to a recombinant yeast with high squalene production, a construction method and a use thereof, wherein the recombinant yeast is a saccharomyces cerevisiae that expresses or overexpresses HMGR gene, ADA gene, LEU2 gene, MVA pathway gene and squalene synthase gene ERG9. The present invention integrates acetaldehyde dehydrogenase gene ADA and HMG-CoA reductase gene tHMGR in multiple copies in saccharomyces cerevisiae, integrates the screened high-activity phosphoketolase gene PK and phosphotransacetylase gene PTA, weakens epoxysqualene synthesis, strengthens the mevalonate pathway, overexpresses yeast endogenous squalene synthase gene, etc. to obtain a recombinant yeast with high squalene production, so that the production in the shake flask stage of the production process exceeds 5g / L, and the production in the fed batch fermentation stage exceeds 50g / L, breaking through the current bottleneck of microbial synthesis of squalene production, and is suitable for practical promotion and application.

The invention discloses a biological catalytic synthesis method of norambrox ether, which comprises the following steps: step 1, starting from trans-nerolidol, carrying out carroll rearrangement reaction to synthesize farnesyl acetone; 2, in the presence of a cofactor, converting farnesyl acetone into high farnesol acetate under catalysis of Bayer-Villiger monooxygenase; step 3, catalyzing the deacetylation of the high-farnesol acetate by using esterase to obtain EE-high-farnesol; and step 4, carrying out enzymatic conversion on farnesol by using the squalene hopaene cyclase mutant to obtain norambrox ether. The transformation process is safe and non-toxic, Bayer-Villiger monooxygenase which is new with a key enzyme, natural co-expressed esterase, alcohol dehydrogenase and squalene and hopaene cyclase mutants matched with the system are used for synergistic transformation, so that not only is the coenzyme for oxidation reaction promoted to be recycled, but also the conversion efficiency is improved; conversion from farnesyl acetone to norambrox ether can be efficiently and specifically catalyzed, and a final product can be directly obtained from a reaction system without separation and purification of an intermediate.

The invention discloses a recombinant strain for producing squalene as well as a construction method and application of the recombinant strain. The construction method comprises the following steps: heterologously expressing cDNA (complementary deoxyribonucleic acid) of each gene in a squalene synthesis route from filamentous fungi in yeast; the squalene synthetic pathway genes comprise a mevalonic acid-5-phosphate kinase gene, a squalene synthase gene, an acetoacetyl coenzyme A thiolase gene, a mevalonic acid kinase gene, a hydroxymethyl glutaryl coenzyme a synthetase gene, a mevalonic acid pyrophosphate decarboxylase gene, a farnesyl pyrophosphate synthetase gene and isopentenyl pyrophosphate. A dimethallylpyrophosphate isomerase gene and a truncated hydroxymethyl glutaryl coenzyme a reductase gene; the culture medium is characterized in that the filamentous fungi are Saroocladium oryzae or Stibella sp. 1056, and the culture medium is a culture medium. The excavated squalene synthesis route can complete efficient de novo synthesis of squalene, and the squalene yield is increased.

The invention belongs to the technical field of biological medicine, and particularly discloses a composite vaccine adjuvant as well as a preparation method and application thereof. The composite vaccine adjuvant provided by the invention is an oil-in-water emulsion, and simultaneously contains squalene, polysorbate 80, sorbitan trioleate, polyinosinic acid (Poly I: C) and CpG oligodeoxynucleotide (CpG-ODN). The sequence-optimized CpG-ODN and Poly I: C are used in a specific emulsion system in a combined mode, a remarkable synergistic immune enhancement effect can be generated, the induced humoral immunity and cellular immunity response level is remarkably higher than the sum of the effects when all the components are independently used, and the composite adjuvant is good in stability, high in immunostimulatory activity and suitable for clinical application. The immune effect can be remarkably improved by combined application with various vaccine antigens. The invention also provides a preparation method and application of the composite vaccine adjuvant.

The invention belongs to the technical field of bioengineering, and relates to a yarrowia lipolytica strain with high squalene yield, a construction method of the yarrowia lipolytica strain and an application method of the yarrowia lipolytica strain in squalane synthesis. Specifically, a DGA1 gene is knocked out on the basis of constructed recombinant yarrowia lipolytica by utilizing a gene editing means, and then a squalene synthetase gene is integrated on a genome, so that a series of recombinant yarrowia lipolytica strains with high squalene yield are constructed; the high-yield strain is subjected to fermentation culture optimization, tricarboxylic acid circulation metabolism is strengthened, alkane is added into a culture solution for extraction to promote discharge of products, and the final squalene yield reaches 42.1 g / L; the squalene extracted and separated from the fermentation broth is subjected to hydrogenation reduction by taking Reshaki nickel as a catalyst to obtain squalene. The constructed recombinant yarrowia lipolytica strain has the advantages of high yield, simple product extraction, separation and conversion, low production cost, and good industrial application prospects.

The application belongs to the technical field of genetic engineering, and discloses a kind of saccharomyces cerevisiae for producing rare ginsenoside by seaweed biomass and a construction method and application thereof.The saccharomyces cerevisiae has the following characteristics: overexpression of agarase, neojuncanohydrolase, hydroxymethylglutaryl coenzyme A reductase, isopentenyl diphosphate delta isomerase, dammaradienol synthase, protopanaxadiol synthase, cytochrome P450 reductase, protopanaxatriol synthase and glycosyltransferase.The application combines enzymolysis of seaweed biomass with fermentation of rare ginsenoside, which not only endows wild-type yeast with the ability to degrade seaweed biomass that it originally does not have, but also effectively improves the yield of squalene and downstream terpenes (rare ginsenoside Rh1) by overexpression of tHMG1 and IDI1.The saccharomyces cerevisiae can effectively utilize seaweed biomass to obtain squalene and rare ginsenoside Rh1, and has the characteristics of simplicity, economy and ecological friendliness, can convert cheap biomass into high-value products, and provides a way for the development of marine bioeconomy.

The invention discloses an anti-oxidation system. The anti-oxidation system is prepared from 0.05 v / v% to 1 v / v% of squalene and 0.2 mM to 5 mM of Trolox. According to the anti-oxidation system provided by the invention, the squalene and the Trolox are combined for use, so that the anti-oxidation function of the Trolox is exerted to the greatest extent; and by using squalene, the problem of pH value fluctuation caused by using a Gloxy and glucose mixed solution can be solved, and the antioxidant system provided by the invention can realize an excellent oxygen removal effect under the condition of not influencing the pH value of the system.

The invention belongs to the technical field of bioengineering, and particularly relates to a preparation process of nanoscale water-soluble squalene. Comprising the following steps: S1, treating corn flour, adding pure water, and performing enzymolysis by adopting compound enzyme to obtain corn saccharified liquid for later use; s2, inoculating saccharomyces cerevisiae GS-A3 into a culture medium containing the corn saccharification liquid, and fermenting; s3, centrifuging the fermentation liquor, and extracting by adopting supercritical CO2 to obtain a squalene crude product; and S4, carrying out nanocrystallization treatment after molecular distillation treatment. According to the method, corn is taken as a raw material, rich starch resources are utilized, the corn is converted into glucose through enzymolysis, squalene is generated in saccharomyces cerevisiae through an MVA way, high-yield and high-purity squalene is prepared, the stability of squalene is improved through a special nanocrystallization treatment mode, the storage life of squalene in the application process is prolonged, and the method is suitable for industrial production. And the bioavailability can be obviously improved. In addition, the technology used in the invention meets the requirements of green and environmental protection.

The invention discloses a method for enhancing squalene synthesis through oil tea HMGR gene editing. According to the method, phosphorylation regulation and control sites Ser47 and / or Thr208 recognized by MAPK are targeted, and enzymatic activity inhibition is relieved and metabolic flux is enhanced by constructing phosphorylation resistance mutants (such as Ser-> Ala and Thr-> Val). The constructed editing vector can be introduced into camellia oleifera tissues in manners of PEG-mediated protoplast transient transfer, agrobacterium infection of calluses and the like, so that stable expression is realized. Experiments prove that the enzyme activity of HMGR in the editor is remarkably improved, the squalene accumulation amount is increased by 50% or above, the editing efficiency is high, expression is stable, and the method is suitable for high-value development of plant triterpenoid functional components and excellent strain breeding. The method also has the potential of popularization and application in other triterpenoid synthetic crops.

The invention discloses a preparation method of a ganoderma spore oil grifola frondosa soft capsule based on a cold preparation method. The preparation method comprises the following steps: firstly, carrying out high-speed shearing and nanocrystallization treatment on grifola frondosa extract, selenium-enriched yeast, squalene and ganoderma lucidum spore oil for later use; and then melting gelatin, glycerol, water and cocoa shell extract at low temperature to obtain a gelatin solution, and finally preparing the soft capsule. According to the invention, on the basis of ensuring sufficient dissolution of the gelatin, the influence of the traditional gelatin melting temperature on the gel strength, the viscosity, the three-dimensional structure, the production stability and other performances and the application effect can be effectively avoided. Meanwhile, the ganoderma lucidum spore oil, squalene, grifola frondosa extract and selenium-enriched yeast are ingeniously combined, so that the content of a landmark component triterpenoid compound in the content is remarkably increased, and the metabolic detoxification capability of the liver and the anti-inflammatory and immune regulation effects of the body are enhanced.

The invention discloses an application of squalene or a pharmaceutically acceptable salt thereof in preparation of a medicine for preventing or treating endotoxemia. Experiments show that squalene significantly relieves LPS-induced endotoxemia liver injury through a multi-target mechanism, squalene not only relieves inflammatory response by inhibiting release of inflammatory factors, but also relieves oxidative stress by activating an antioxidant pathway, and the squalene has dual action mechanisms. The invention further provides application of the squalene-containing composition to preparation of the medicine for treating endotoxemia, squalene and glucocorticoid show a synergistic effect in the aspect of inhibiting TNF-alpha, AST can be reduced more remarkably by combining squalene and glucocorticoid, and the effect of dual inhibition of inflammatory mediators is achieved. Besides, the composition of the inducible nitric oxide synthase and squalene is applied to the preparation of the medicine for treating endotoxemia, and the inducible nitric oxide synthase inhibitor can inhibit the activity of iNOS, so that the excessive generation of nitric oxide is reduced, and the inflammatory reaction is further inhibited synergistically.

The invention discloses an emulsifier for preparing a Pickering emulsion, the Pickering emulsion as well as a preparation method and application of the Pickering emulsion. The emulsifier of the Pickering emulsion is obtained by dissolving distearoyl phosphatidylcholine, cholesterol and distearoyl phosphatidyl ethanolamine-polyethylene glycol 2000 in ethanol, carrying out rotary evaporation to remove ethanol, then adding an antigen aqueous solution containing an antigen, continuing rotary evaporation to obtain liposome nanoparticles, heating the liposome nanoparticles with mannose in a water bath, and carrying out freeze drying. The Pickering emulsion is obtained by dispersing an emulsifier in water as a water phase, taking squalene as an oil phase, mixing the water phase and the oil phase, and homogenizing. The Pickering emulsion disclosed by the invention is prepared by taking antigen presenting cell targeted liposome nanoparticles as a raw material; and the antigen has excellent ion concentration characteristic, pH stability, temperature stability and storage stability, and can protect the integrity of the antigen.

To provide a novel squaraine dye-peptide complex that enables selective detection of esterase, being one of tumor markers.SOLUTION: A squaraine dye-peptide complex is prepared by incorporating an oligopeptide between two squaraine dyes represented by formula (1), where R1B and R2B each independently represent a C1 to C30 monovalent aliphatic hydrocarbon group, with at least one having a carboxyl group at a terminal, and R3B and R4B each independently represent H or a carboxyl group, with at least one being a carboxyl group.SELECTED DRAWING: Figure 3

The invention discloses a composite adjuvant, and belongs to the field of vaccine adjuvants. The main active components of the composite adjuvant are squalene, polysorbate 80 and monophosphoryl ester A, the composite adjuvant is in an oil-in-water emulsion form, nano-scale emulsion droplet particles are uniformly distributed in a water phase, and the system is stable. The invention also discloses a preparation method of the composite adjuvant based on a stirring method. The composite adjuvant comprehensively utilizes the dual characteristics of the oil-in-water emulsion and the immunopotentiator, and can induce a higher level of immunoreaction when being combined with the antigen, so that the composite adjuvant can be used for preparing vaccines and improving the effectiveness of the vaccines.

The present invention discloses a preparation method of Ganoderma lucidum spore oil and Grifola frondosa soft capsules based on a cold preparation method. First, Grifola frondosa extract, selenium-enriched yeast, squalene, and Ganoderma lucidum spore oil are subjected to high-speed shear nano-processing and then set aside; subsequently, gelatin is subjected to low-temperature gelation with glycerol, water, and cocoa shell extract to obtain a gelatin solution, and finally, soft capsules are prepared. While ensuring that gelatin is fully dissolved, the present invention effectively avoids the impact of traditional gelation temperature on gel strength, viscosity, three-dimensional structure, production stability, and other properties and application effects. At the same time, the Ganoderma lucidum spore oil and squalene, Grifola frondosa extract, and selenium-enriched yeast are cleverly combined to significantly increase the content of triterpenoid compounds, a characteristic component in the contents, thereby enhancing the liver's metabolic detoxification ability and the body's anti-inflammatory and immunomodulatory effects.

The invention discloses a saccharomyces cerevisiae strain for de novo synthesis of fucoxanthine precursor neoxanthine and application of the saccharomyces cerevisiae strain, and belongs to the technical field of biology. According to the recombinant saccharomyces cerevisiae disclosed by the invention, the 3-hydroxy-3-methylglutaryl coenzyme A reductase, the isopentenyl pyrophosphate isomerase, the farnesyl pyrophosphate synthase and the endoplasmic reticulum size regulation factor are expressed in an enhanced manner; according to the method, geranyl geranyl diphosphate synthase, phytoene dehydrogenase, 15-cis-phytoene synthase, bifunctional lycopene cyclase / phytoene synthase, beta-carotene hydroxylase, zeaxanthin epoxidase truncated mutant and violaxanthin deep oxidase-like protein are subjected to heterologous expression, so that the zeaxanthin deep oxidase-like protein is obtained; the ROX1 and GAL80 genes in the saccharomyces cerevisiae are knocked out, and the expression of squalene synthase ERG9 is down-regulated. When the strain is subjected to shake flask fermentation, the contents of neoxanthine and violaxanthin of the strain respectively reach 1.78 mg / L and 26.77 mg / L, so that the strain has a wide application prospect.

The invention provides Saccharomyces cerevisiae for producing squalene as well as a screening method and application of the Saccharomyces cerevisiae. The method comprises the following steps: culturing a Saccharomyces cerevisiae engineering strain ySC782 for synthesizing squalene to obtain a to-be-mutagenized bacterial solution, carrying out ARTP mutagenesis on the to-be-mutagenized bacterial solution, adding the to-be-mutagenized bacterial solution into a YPD liquid culture medium, culturing to obtain a resuscitation bacterial solution, adding the resuscitation bacterial solution into a sucrose solution with gradient concentration distribution, screening, and repeating the ARTP mutagenesis-sucrose solution screening step to obtain the squalene mutant strain. And finally, the saccharomyces cerevisiae strain ySC782-M5 is obtained through screening, and the saccharomyces cerevisiae strain ySC782-M5 is obtained through screening. The yield of squalene produced by the saccharomyces cerevisiae ySC782-M5 reaches 49.83 g / L, so that a solution is provided for breaking through the yield bottleneck of squalene synthesized by yeast.

The invention discloses melogabalin besylate tablets and a preparation method thereof, and relates to the technical field of medicines. The melogabalin besylate tablet is prepared from melogabalin besylate, a filling agent, a disintegrating agent, a stabilizing agent, a lubricating agent and an antioxidant composition, the antioxidant composition comprises tartaric acid and squalene. The preparation process is optimized, a uniform and stable solid dispersion is prepared by means of a hot melt extrusion process, and it is guaranteed that active raw materials and the antioxidant are uniformly mixed; the antioxidant composition with compatibility of tartaric acid and squalene is screened, and the stability of the antioxidant in the long-term storage process is remarkably improved.

The invention discloses a self-emulsifying adjuvant of a vaccine and a preparation method of the self-emulsifying adjuvant, and relates to the technical field of vaccine adjuvants. The adjuvant comprises an oil phase, an emulsifier and a freeze-drying protective agent, the oil phase comprises squalene and tocopherol, the emulsifier comprises polysorbate and a polyoxyethylene-polyoxypropylene block copolymer, and the freeze-drying protective agent comprises sugar and sugar alcohol. The preparation method comprises the following steps: emulsifying an oil phase and a water phase to form a nano-emulsion, and then freeze-drying to obtain freeze-dried powder. The adjuvant has the advantages of small particle size, uniform distribution, high stability, rapid reconstruction and the like, and can effectively maintain active components and improve the immune effect of vaccines.

The invention relates to the technical field of soothing compositions, and discloses a camellia oil composition for soothing dry, itching and red skin and a preparation method of the camellia oil composition. 0.2 to 5 parts of natural vitamin E; 20 to 70 parts of glycerol; 0.1 to 5 parts of a nonionic emulsifier; 1 to 10 parts of water; in the camellia oil, the content of triterpene alcohol is greater than or equal to 1500mg / kg; the content of squalene is greater than or equal to 100mg / kg; the nonionic emulsifier is prepared from polyglycerol-6 stearate and glyceryl stearate. Camellia oil rich in triterpenol and squalene is adopted as a raw material, and the soothing effect can be effectively improved; meanwhile, the natural vitamin E is added, so that the active ingredients of triterpene alcohol and squalene in the camellia oil can be stabilized; and the camellia oil and the natural vitamin E are prepared into an intermediate which can be directly applied to water aqua, cream and cleaning products, and meanwhile, the stability of the products is improved.

The invention relates to the technical field of deep processing of vegetable fat, in particular to a preparation method and application of squalene-containing macadamia nut oil. Through the synergistic effect of directional enzymolysis conversion and low-temperature step-by-step extraction and the combined effect of the three enzymes (cellulase destroys cell walls, lipase releases grease and beta-glucosidase removes inhibitors, and the three enzymes form a wall breaking-oil releasing-synergistic synergistic reaction) by utilizing a compound enzyme which is fixedly matched and proportioned. The compound enzyme can be used for synchronously treating cellulose, lipid and glycoside substances, so that the release efficiency of squalene is improved; and step-by-step extraction is utilized to reduce extraction impurities, so that the content of squalene in the macadamia nut oil can be increased, and the extraction and enrichment of squalene in the macadamia nut meat can be realized.

The invention relates to the technical field of synthetic biology, in particular to a squalene high-yield saccharomyces cerevisiae engineering bacterium and a construction method and application thereof.Saccharomyces cerevisiae CEN.PK.2-1D is used as an original strain, pentose phosphate pathway genes ZWF1, GND1, TAL1 and TKL1 and IDP1 genes of TCA circulation are integrated in a genome of the original strain through homologous recombination, and the squalene high-yield saccharomyces cerevisiae engineering bacterium is obtained. Constructing a dual-channel cofactor supply system to improve the intracellular NADPH level and the NADPH / NADP + ratio; according to the saccharomyces cerevisiae genetic engineering strain Sc-Sq04 constructed by the method disclosed by the invention, the yield of squalene obtained by shake flask fermentation reaches 741.08 + / -28.9 mg / L by further integrating all genes of an MVA way, ERG20 and ERG9 genes, and a new thought is provided for transforming saccharomyces cerevisiae to synthesize terpene compounds and promoting industrial application.

The invention belongs to the technical field of medicines, particularly relates to the field of immunology, and more particularly relates to an adjuvant composition for vaccines as well as a preparation method and application of the adjuvant composition. The adjuvant is prepared from squalene, Tween 80, poloxamer 188 and oligonucleotide CpG1018. Experiments show that the adjuvant disclosed by the invention is obviously superior to an adjuvant in the prior art, so that the adjuvant has an application prospect.

The invention relates to the technical field of nutritious food, and discloses a DHA microcapsule and a preparation method thereof. The DHA microcapsule contains a core material and a wall material, the core material contains DHA oil, squalene and carotenoid, the carotenoid is selected from at least one of beta-carotene, alpha-carotene, lycopene, xanthophyll and zeaxanthine, and the mass ratio of the DHA oil to the squalene to the carotenoid is 1: (0.1-0.55): (0.04-0.16). The DHA microcapsule has relatively low surface oil and a relatively good embedding effect, and active substances in the DHA microcapsule have a relatively high retention rate.

Disclosed herein are reagents, reagent kits, and culture media for activating and expanding immune cells in vitro. In some embodiments, the reagents, reagent kits, and culture media comprise a Quillaja saponin. In other embodiments, the reagents, reagent kits, and culture media comprise a squalene-based emulsion. Also disclosed are methods for activating and expanding immune cells in vitro using the reagents, reagent kits, and culture media.

SILICONE-FREE COSMETIC COMPOSITIONS This disclosure relates to compositions including squalene, at least one bio-based branched hydrocarbon, at least one bio-based pentaerythrityl ester, and processes for using such compositions. The cosmetic composition is silicone-free. The cosmetic composition spreads easily and has favorable sensory properties without the use of silicones. Figure for the abstract: none

The formula comprises the following raw materials in parts by weight: 70-85 parts of base liquor, 5-15 parts of fresh pandan leaves, 0.5-3 parts of baked pandan leaf powder, 1-3 parts of a flavor modifier, 3-8 parts of a sugar source and 0.1-0.6 part of a functional additive. The unique flavor of the pandan leaves originates from the rich 2-acetyl-1-pyrroline, and the pandan leaves give out charming rice dumpling fragrance and have the effects of promoting appetite and metabolism at the same time. The pandan leaves are blended into the food, so that the delicious taste is improved, and additional nutritional value is also brought. The pandan leaves are rich in dietary fibers, vitamin B family, vitamin C and various minerals. The composition also contains squalene, linoleic acid, estragole, phytol and other active ingredients. Squalene is a natural organic terpenoid, widely exists in a living body, and has remarkable effects in the aspects of promoting blood circulation, resisting oxidation, resisting inflammation, resisting tumors and the like. The prepared pandan wine has multiple effects and is beneficial to body health after being drunk for a long time.

The invention belongs to the technical field of veterinary vaccine adjuvants, and particularly relates to an intestinal tract targeted saccharum alhagi polysaccharide-aluminum adjuvant Pickering emulsion as well as a preparation method and application of the intestinal tract targeted saccharum alhagi polysaccharide-aluminum adjuvant Pickering emulsion. The intestinal tract targeted saccharum alhagi polysaccharide-aluminum adjuvant Pickering emulsion is AHPPE, the AHPPE is formed by mixing an oil phase and a water phase, and the volume ratio of the oil phase to the water phase is 1: (9-13); the oil phase is prepared from the following raw materials: squalene and retinoic acid; the mass ratio of the squalene to the retinoic acid is 1: (0.7-0.8); the water phase is prepared from the following raw materials: saccharum alhagi polysaccharide and aluminum hydroxide; the mass ratio of the saccharum alhagi polysaccharide to the aluminum hydroxide is 1: (10-13). According to the preparation method provided by the invention, the problems that retinoic acid is difficult to dissolve in water and the metabolism speed of saccharum alhagi polysaccharide is high are solved, and meanwhile, an organism can be induced to generate effective systemic immunity and intestinal mucosa immunity by injecting AHPPE.

The present invention relates to a process for obtaining minor components from vegetable oils, and wherein the vegetable oil includes palm oil, palm olein, palm mid-fraction or mixtures thereof and wherein the minor components of interest are squalene, tocopherols, and optionally tocotrienols. The process is comprising, a fractionation in short path evaporator followed by a further fractionation in short path evaporator. The feed stream may be a condensate stream from a deodorization step.

The present application relates to oxidized squalene cyclase, recombinant vector, recombinant engineering bacteria and application thereof, and preparation method of parkol. The oxidized squalene cyclase comprises: a polypeptide consisting of the amino acid sequence shown as SEQ ID No. 1; or a polypeptide consisting of the amino acid sequence shown as SEQ ID No. 1 with one or more amino acids being deleted, substituted or added; or a polypeptide having at least 80% homology with the polypeptide consisting of the amino acid sequence shown as SEQ ID No. 1. The above-mentioned oxidized squalene cyclase can catalyze 2, 3 oxidized squalene to produce parkol, and the enzyme can be expressed according to the coding sequence of the cyclase, and then the substrate is catalyzed to improve the yield of parkol.