201 results about "Hepatic tissue" patented technology

The invention is directed to oligonucleotides and oligonucleosides functionalized to include lipophilic moieties and having improved biostability and altered biodistribution in mammals. In one embodiment, such lipophilic oligonucleotide conjugates are used in a method of targeting antisense oligonucleotides to hepatic tissues and thereby preferentially modulating gene expression in the liver and associated tissues of a mammal.

This disclosure pertains to methods and compositions for tolerizing a mammal's brain to exogenously administered acid sphingomyelinase polypeptide by first delivering an effective amount of a transgene encoding the polypeptide to the mammal's hepatic tissue and then administering an effective amount of the transgene to the mammal's central nervous system (CNS).

The invention provides a method for isolating and culturing human primary hepatocytes, comprising the following steps: cleaning blood clots on surfaces of hepatic tissues by using D-Hank's solution and cutting off connective tissues; using a needle syringe for puncturing on multipoints to perfuse anterior perfusion solution preheated to 38 DEG C so that a hepatic tissue block changes from dark red to gray and the effluent anterior perfusion solution becomes clear; using the needle for puncturing on multipoints to perfuse preheated recyclable type II collagenase solution until the hepatic tissue block is loosened and inelastic and has turtleback cracks on the surface; scissoring the hepatic tissue block, passively isolating the hepatic tissues, removing residual envelops and fibrillar connective tissues and continuously shaking and digesting in the type II collagenase solution at 37 DEG C; blowing and beating digest into hepatocyte suspension, filtering the suspension under ice bath condition, collecting filtered suspension, transferring the filtered suspension to a centrifuging tube and centrifuging at low speed; adding bottom precipitate produced from the primary low-speed centrifuging of the filtered suspension to erythrocyte lysate, blowing and beating, standing at room temperature, adding Dulbecco's modified eagle medium (DMEM), mixing the mixture uniformly, cleaning, centrifuging at low speed, adding DMEM again, mixing uniformly, centrifuging at low speed for 2-4 times and adding bottom precipitate produced from the last-time low-speed centrifuging to Williams' MediumE complete medium suspension; adjusting the hepatocytes density to 1*105/ml, inoculating the hepatocytes in a culture bottle laid with rat tropocollagen, carrying out constant culturing in a CO2 incubator at 37 DEG C, changing the suspension to remove died hepatocytes and non-adherent hepatocytes after the hepatocytes are adhered to the wall and continually culturing the hepatocytes.

Disclosed is a method for detecting CYP450 enzymatic activity by means of micro-liver tissue incubation in vitro, which is characterized in that: a liver trace puncturing method used in clinic takes micro-liver tissues of 0.1 to 0.2g, or kills a mouse to take out the liver in an animal experiment, and builds a micro-liver tissue in vitro incubation system, then uses a one-probe medicine to perform the liquid phase chromatography tandem mass spectrometry for detecting probe substrates and concentration of corresponding metabolites, and obtains the activity of P450 enzyme according to metabolite ratios thereof. The method has the advantages of: 1. micro scale: only micro-liver tissues of 0.1 to 0.2g are needed for detecting cytochrome P450enzyme activity, and can be used for animal experiment and checking clinic micro-liver tissue liver drug enzyme activity; 2. time saving and convenience: costly ultracentrifugation equipment used in the conventional method is saved, costs and time for detection are greatly saved, and liver enzyme metabolic condition simulation is better; and 3. establishing indexes for evaluating the enzyme metabolic activity: metabolite ratios.

The invention relates to a method of diagnosing non-alcoholic steatohepatitis (NASH) using molecular markers. The inventive method consists in detecting and quantifying, in vitro in a hepatic tissue sample, the levels of a protein which can be used as a NASH molecular marker and which is selected from apolipoprotein A1, sub-unit β of the mitochondrial ATPase, leukotriene A4 hydrolase, keratin 18, guanidine acetate N-methyltransferase, superoxide dismutase, albumin, antioxidant protein 2 (isoform 1), prohibitin 1, methionine adenosyl transferase, long-chain acyl CoA dehydrogenase, selenium binding protein, antioxidant protein 2 (isoform 2), and combinations of same. The invention further consists in comparing the results obtained with the normal values of said proteins in healthy hepatic tissue. Said method can be used to diagnose NASH and/or to assess a patient's potential risk of developing NASH.

The invention relates to an active spirulina polysaccharide and a preparation method thereof. By introducing an activity evaluation index, discussing the influence of a raw material pretreatment method and different extraction processing technologies on spirulina polysaccharide yield, polysaccharide preservation rate, protein removal rate and polysaccharide lipid peroxidation resistance and evaluating and screening an extraction processing technology capable of well keeping the bioactivity of the spirulina polysaccharide and with relatively high spirulina polysaccharide yield, the active spirulina polysaccharide is prepared by preferable process conditions; the main active ingredients of the active spirulina polysaccharide are binding protein polysaccharides, the molecular weights of which are 100,000 and 95,000 respectively; the active spirulina polysaccharide has remarkable hepatic tissue lipid peroxidation activity resistance; and the two binding protein polysaccharides are qualitycontrol index ingredients of a spirulina lipid peroxidation activity resistant polysaccharide product. Compared with a method discussed in the conventional technology, the protection of the extraction, separation and purification processes on the activity of the spirulina polysaccharide is stressed; and by comprehensively evaluating and optimizing the preparation process conditions, blindness of the process discuss and destroy and loss of the active ingredients in the extraction and purification processes can be greatly reduced.

The invention discloses a 3D hepatoma tissue construction method based on biological 3D printing hydrogel. The method comprises the steps as follows: 1) a GelMA biomaterial is synthesized, and the acylation rate and light polymerization time of the GelMA biomaterial are detected; 2) after GelMA and an photoinitiator are uniformly mixed and dissolved, human hepatoma cell HepG2 and GelMA solutions are uniformly mixed, the cell concentration is adjusted to 1*10<6>/mL, and biological printing ink is prepared. Biological printed cells and a hydrogel system are placed under an ultraviolet lamp for light polymerization for 5 min to be cured, the cured system is placed in a 10%FBS culture solution to be cultured for 7 d, and a hepatoma tissue engineered unit containing an HepG2 source is prepared and saved for later use; 3) the swelling ratio and balance water content of a 3D hepatoma tissue material are detected; 4) the growth states of 2D and 3D on the seventh day are detected with a BE histochemistry method. The method is reliable, convenient to operate and high in repeatability and can effectively promote formation of hepatoma tissue functions and provide beneficial reference for scientific research of hepatic tissue engineering and clinical treatment of hepatoma.

The invention relates to a method for separating, culturing and identifying primary hepatic cells of livestock and fowl, which integrates a chelation process and an in-situ two-step perfusion process. Ca<2+> and Mg<2+> in hepatic tissues of livestock and fowl are previously removed so that the hepatic tissues maximally release the primary hepatic cells; and the formula of additives of the culture fluid is adjusted to perfect the serum-free culture system and identify the glycogen of the obtained primary hepatic cells. The invention can effectively enhance the quantity, motility and purity of the separated primary hepatic cells of livestock and fowl, and is applicable to various animals; and the obtained primary hepatic cells have the advantages of fewer traumas, high wall attaching tendency and high activity, can be widely used for physiological function adjustment, metabolic diseases, and pharmacological and toxicological mechanisms of hepatic cells of livestock and fowl, can establish a virus infected cell model, and can be used for research in the fields of physics and chemistry, toxicant factor influence and the like.

The invention relates to the use of pepper amide compound in preparation of drug or healthcare product for reducing blood fat with the general formula (I), wherein R, R1, R2 are defined in the specification, the piperamide compounds represented by formula (1) have the actions of substantially reducing cholesterin, triglyceride and increasing high density lipoprotein, fully activating lecithin cholesterol acyl transferase, forwarding extra-hepatic tissue cholesterol to liver, cleaning out plasma lipoproteins, plasma cholesterol and cholesterol esters, thus can be applied to the prevention and treatment of cardiovascular and cerebrovascular diseases, such as atherosclerotic, cerebrovascular, coronary artery and peribiliary vessel pathology and hyperlipemia.

The invention discloses a method for separating primary adult hepatocytes. The method comprises the following steps: (1) carrying out multi-point puncture on surface of isolated adult hepatic tissue through a needle syringe, and injecting a preperfusate, wherein connective tissues are removed from the isolated adult hepatic tissue; (2) carrying out the multi-point puncture on the surface of the isolated adult hepatic tissue through the needle syringe again, and injecting a IV collagenase solution; (3) separating the isolated adult hepatic tissue, followed by adding the IV collagenase solution and carrying out digesting through vibration at a temperature of 37 DEG C to obtain digest; (4) carrying out filtering for the digest, followed by centrifuging and collecting cell aggregate in the underlayer, then resuspending the adult hepatocyte aggregate through a hepatocyte wash buffer, followed by filtering and centrifuging, then abandoning supernatant and collecting the adult hepatocyte aggregate in the underlayer; (5) washing the adult hepatocyte aggregate in the underlayer from the step (4) through a serum-free DMEM medium to obtain the primary adult hepatocytes. The invention further discloses a disposable special sterile apparatus box for separating the primary adult hepatocytes. With the present invention, the disposable special sterile apparatus box is adopted, the primary adult hepatocytes are separated through the multi-point puncture on the surface of the tissue and the injection, such that operation is simplified, cost is reduced, and the method and the apparatus box are applicable for extracting the hepatocytes from small pieces of the irregular isolated adult hepatic tissues of recovery of liver resection.

The invention provides a natural drug oral preparation for relieving or neutralizing effects of alcohol. The natural drug oral preparation comprises, by mass, 10-15% of curcumin, 15-25% of kudzu vine root extract flavonoids, 10-25% of Chinese magnoliavine fruit total lignins, 0.05-5% of VB6, 0.05-5% of VE, 0.05-5% of VC and the balance auxiliary materials. The natural drug oral preparation is processed to form common oral preparations such as particles, tablets and capsules. Curcumin, kudzu vine root total flavonoids and Chinese magnoliavine fruit total lignins are obtained through extraction and then macroporous resin separation purification. The natural drug oral preparation has active ingredient content of 30-80%. A product test proves that the natural drug oral preparation can obviously reduce malonaldehyde, triglyceride and glutathione content of mouse hepatic tissue, inhibit alcohol-caused small intestine permeability increasing, reduce a blood alcohol concentration and relieve discomfort after drinking and alcoholic liver injury.

The invention belongs to the technical field of ultrasonic medicine and particularly relates to a hepatic fibrosis degree Fisher identification method based on an ultrasonic radio frequency (RF) time sequence. The method includes that first, a broadband ultrasonic linear array probe is used for scanning a living hepatic tissue, and multi-frame ultrasonic echo RF signals are recorded; a certain frame of B type pattern is demodulated and displayed, a region of interest (ROI) is selected, all frame RF signals of each point in the ROI are taken to form the ultrasonic RF time sequence; SMR fractal dimension mean values and a plurality of characteristic parameters of the RF time sequence in the ROI are extracted, the 7 features are extracted for a large amount of normal and fibrosis hepatic samples, Fisher distinguishing rate of each feature parameter is collected and obtained, the normalization Fisher distinguishing rate is used as the weight of a new input sample corresponding feature parameter, and the absolute value of each feature parameter of a new sample is weighted and summed to obtain Score-fisher. The hepatic fibrosis degree Fisher identification method based on the ultrasonic RF time sequence is brought up for the first time and provides quantification reference for clinical hepatic fibrosis diagnosis and dynamic monitoring.

The invention discloses a silybin nanostructured lipid carrier, comprising the following components: 0.05-0.5wt% of silybin, 0.1-5wt% of a solid lipid material, 0.02-2wt% of liquid lipid, 0.2-5wt% of liposoluble emulsifier, 0.2-5wt% of water-soluble emulsifier, and the balance of water. The preparation method is an improved microemulsion technology-emulsification and evaporation-low-temperature curing method. The silybin nanostructured lipid carrier prepared by the method has the advantages of a particle size of about 200nm, a slow release function in vivio, prolonged cycle time of medicines, passive targeting in a hepatic tissue, improved bioavailability of the silybin, good biocompatibility, easy degradation, high encapsulation rate, high drug-loading rate and the like.

The application concerns means for determining the stage of hepatic tissue damage, in particular the hepatic fibrosis score of subjects infected with one or more hepatitis viruses. In particular, the means of the invention involve measuring the levels of expression of selected genes, said selected genes being:

• • SPP1, and
  • at least one gene from among A2M and VIM, and
  • at least one gene from among IL8, CXCL10 and ENG, and
  • optionally, at least one gene from among the list of the following sixteen genes: IL6ST, p14ARF, MMP9, ANGPT2, CXCL11, MMP2, MMP7, S100A4, TIMP1, CHI3L1, COL1A1, CXCL1, CXCL6, IHH, IRF9 and MMP1.

The invention discloses refined glossy privet fruit total glycosides capable of preventing and treating liver injury and a preparation method thereof. The preparation method is characterized in that the chemical compositions and pharmacological activity of the glossy privet fruit are researched and selected systematically; and the experiment results show that the selected refined glossy privet fruit total glycosides can obviously reduce serum ALT (Alanine Transaminase) and AST (Aspartate Aminotransferase) activities of a CCl4-induced liver injury model mice and the MDA (Methyl Di Aldehyde) content in the hepatic tissue of an alcohol-induced liver injury model mice and improve the GSH (Glutathione) activity of the liver, and also show that the refined glossy privet fruit total glycosides provided by the invention not only can obviously protect the liver from chemical liver injury and long-term drinking induced liver injury and can be developed into novel medicines or health products for preventing liver injury.

The invention relates to the use of piperic acid ester compound in preparation of drug or healthcare product for reducing blood fat, wherein R1, R2, R3 are defined in the description, the piperic acid ester compounds represented by formula (1) have the actions of substantially reducing cholesterin, triglyceride and increasing high density lipoprotein, fully activating lecithin cholesterol acyl transferase, forwarding extra-hepatic tissue cholesterol to liver, cleaning out plasma lipoproteins, plasma cholesterol and cholesterol esters, thus can be applied to the prevention and treatment of cardiovascular and cerebrovascular diseases, cerebrovascular, coronary artery and peribiliary vessel pathology and hyperlipemia.

The invention discloses a method for separating, freezing and resuscitating human fetal hepatocytes susceptible to hepatitis B virus and an application of the method. The method comprises the following steps of thoroughly rinsing fresh hepatic tissues by utilizing a filling solution through an exposed blood vessel until complete digestion; placing the fresh separated hepatic cells into a culture dish containing cell washing liquid, and filtering the cells by utilizing a cell sieve to obtain single cell suspended liquid; precipitating washed single cells, re-suspending the cells, and storing the precipitated single cells to liquid nitrogen by utilizing a gradual freezing method; and establishing compact cell single-layer culture by optimizing planking density of high-vitality fetal hepatic cells, purifying the low-vitality hepatic cells through a Percoll centrifugal medium, subsequentially culturing the cells so as to resuscitate the fetal hepatic cells. By adopting the method, a great amount of fetal hepatic cells can be separated, stored and high-efficiently resuscitated, and the resuscitated fetal hepatic cells can maintain good characteristics of the hepatic cells, good differentiation state and good susceptibility to the hepatitis B virus, so that the problem that the primary hepatic cells are in shortage can be solved, and a stable hepatitis B virus medicinal sieve platform can be established.

The invention discloses a co-culturing method of human primary hepatocytes and liver nonparenchymal cells. The co-culturing method comprises following steps: fresh hepatic tissue is washed thoroughly with exposed blood vessel perfusate I and perfusate II until elasticity of the hepatic tissue is lost, and complete digestion is realized; the hepatic tissue is delivered into a culture dish filled with a cell washing liquor, and is screened so as to obtain a single-cell suspension; a culture plate or a culture dish coated with collagen is inoculated with the single-cell suspension with a low inoculum density so as to obtain monolayer co-cultured cells with a fusion degree of 100% in the presence of growth factors; and a maintaining culture medium containing 2% DMSO is added into the culture plate or the culture dish for culturing, and then a liver island structure is formed by accumulation of hepatic cells, wherein the liver island structure is surrounded and invaded by liver nonparenchymal cells. Routine hepatocyte separation technology is employed in the co-culturing method, in vitro long-term culturing of hepatocytes as long as 120 days are realized, and HBV susceptibility is maintained for as long as 72 days. In addition, the co-culturing method can be used for screening and evaluating anti-HBV medicines, and possesses significant importance on researches of antiviral medicines.

The invention provides a method for detecting hepatitis B virus covalently-closed circular DNA (HBV ccc DNA) from the samples of peripheral blood, hepatic tissues and the like by utilizing two-color fluorescence polymerase chain reaction (PCR) technology, namely a PCR-two-color fluorescence probe method, and a kit therefor. The method comprises the following steps of: (1) collecting the samples; (2) extracting the DNA; (3) detecting the samples by a two-color fluorescence quantitative PCR in-vitro amplification method; and (4) analyzing the samples according to the fluorescence intensity of the amplification reaction of the corresponding samples after the amplification reaction is finished, thereby judging the existence of the HBV ccc DNA in the collected samples and accurately quantifying the HBV ccc DNA by using the standard curve of a positive quality control material to realize the real-time, fast and quantitative detection of the HBV ccc DNA.

The invention relates to a functional feed, in particular to the functional feed for preventing and treating a white liver lesion of micropterus salmoides, and a preparation method thereof. The feed comprises, by weight percentage, 15-25% of fish meal, 20-35% of chicken powder, 16-22% of soybean meal, 8-15% of flour, 4-8% of squid extractum, 1-2% of calcium dihydrogen phosphate, 1-2% of a multi-vitamin premix, 1-2% of a multi-mineral premix, 2-4% of fish oil, 1-2% of soybean oil, 1-2% of phosphatide oil, 2-7% of corn protein powder, 0.2-0.5% of pennisetum sinese herb extract, 0.1-0.5% of mulberry leaf fermentation liquid, and 0.1-0.3% of red rooted saliva root fermentation liquid. Compared with a common puffed feed for the micropterus salmoides, a feed formula provided by the invention can meet the basic nutrient demands of juvenile fishes, medium fishes and adult fishes of the micropterus salmoides, also can effectively enhance exchangeable backflow between artery blood and vein blood in hepatic tissue blood circulation, and has a good prevention effect and a repair treatment effect on the white liver lesion and hepatic tissue hypofunction caused by the white liver lesion.

The invention provides abalone viscera acidic polysaccharose. According to the abalone viscera acidic polysaccharose, a main chain comprises rhamnose and glucuronic acid, wherein a C-2 position or C-3 position of the rhamnose in the main chain is subjected to sulphating; and the rhamnose in the main chain is connected with the rhamnose or galactose to form a branched chain structure. The abalone viscera acidic polysaccharose which is extracted from abalone viscera can promote the proliferation of hepatoma carcinoma cells (HepG2) in vitro obviously, and has a certain effect of dose dependency; and experiments of studying a repair effect of the abalone viscera acidic polysaccharose on the HepG2 cells which are subjected to oxidative damage and on rat hepatic tissues which are subjected to acute hepatic damage caused by carbon tetrachloride in vivo indicate that the abalone viscera acidic polysaccharose can be used as a functional factor for protecting liver.

The invention provides a soft capsule health food capable of protecting the liver. The food is characterized by comprising squalene and soybean lecithin soft capsules and plant oil. The invention further provides a preparation method and application of the health food. According to the food, squalene is compounded with soybean lecithin, so that the content of rat serum triglyceride and malondialdehydle of an alcohol model can be remarkably reduced and the content of reduced glutathione in hepatic tissues is increased, which fully shows that a squalene and soybean lecithin compound has a remarkable protection effect on alcohol-induced liver damage; therefore, the protection effect on chemical liver damage can be improved. Compared with single soyabean lecithin, the squalene and soybean lecithin compound has a better protection effect on chemical liver damage.

The invention relates to a quantitative PCR detection method for hepatic tissue HBVcccDNA. The method comprises the following steps: extracting a genome DNA specimen in hepatic tissues; establishing a beta-actin plasmid standard; taking total RNA of adult peripheral blood cells as a template, performing inverse transcription to synthesize cDNA; performing PCR amplification on corresponding cDNA target fragments of human beta-actin genes by taking the cDNA as a template, establishing to form recombinant plasmid by taking pMD18-T as a carrier, performing electrophoresis and sequencing identification, and making a beta-actin standard curve by using fluorescent quantitative PCR. According to the method disclosed by the invention, HBVcccDNA and beta-actin in the hepatic tissues can be subjected to sensitive and specific amplification, quantification of the HBVcccDNA in hepatic cells is realized, and the method can be used for detection and application of HBVcccDNA in the clinical hepatic tissue and hepatic cells.