Active dendrobe polysaccharide capable of protecting liver and resisting liver fibrosis and preparation method of antibody affinity chromatography
A technology for anti-liver fibrosis and Dendrobium polysaccharide is applied in the field of plant extract and plant extract preparation, and can solve the problems of low yield, low purity and the like
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Embodiment 1
[0042] Example 1 : Extraction, purification and structural characterization of active dendrobium polysaccharides
[0043] The specific operation steps of the extraction, separation and purification method of the hepatoprotective and anti-hepatic fibrosis active dendrobium polysaccharide are as follows:
[0044] (1) Raw material pretreatment: Take crushed Dendrobium huoshanense, degrease and decolorize with petroleum ether at 50°C for 5 hours, and place it in an environment with a temperature of 25°C to remove the organic solvent by volatilization to obtain the medicinal residue of Dendrobium;
[0045] (2) Hot water extraction: Take Dendrobium medicinal dregs, add distilled water according to the mass-volume ratio of material to liquid 1 g︰30ml, and extract at a temperature of 80°C for 60 minutes to obtain an extract; extract the extract at a speed of 15000 r / min centrifuged for 15 min under the same conditions, and the centrifuged sediment obtained was extracted twice with h...
Embodiment 2
[0055] Example 2 : Antibody affinity chromatography preparation method of active dendrobium polysaccharide
[0056] Step 1 Prepare the immunogen: take the active dendrobium polysaccharide and dissolve it in a carbonate buffer solution with a pH value of 9.2 to prepare an active dendrobium polysaccharide solution with a mass fraction of 10 mg / ml, and then add bovine serum albumin to make the active dendrobium polysaccharide solution The mass fraction of bovine serum albumin in the mixture is 10 mg / ml, stir and mix well, and place it in a thermostat at 37°C for 3 days to obtain a reaction system; add ethanolamine to make the mass fraction of ethanolamine in the reaction system reach 1%. Terminate the reaction to obtain a reaction solution; the reaction solution is separated by a Sephadex G-150 gel column and collected in parts; respectively, the phenol-sulfuric acid method and the Bradford method are used to measure the content of active dendrobium polysaccharides and bovine se...
Embodiment 3
[0064] Example 3 : Protective effect of dendrobium polysaccharides on carbon tetrachloride-induced acute liver injury and liver fibrosis in rats
[0065] After adaptive feeding for one week, SD rats were weighed and randomly divided into 6 groups: normal control group, model control group, low-dose Dendrobium polysaccharide group (100 mg / kg.bw), medium-dose Dendrobium polysaccharide group (200 mg / kg .bw), Dendrobium polysaccharide high-dose group (400 mg / kg.bw), bifendate positive control group (200 mg / kg.bw), 10 rats in each group. Except for the normal control group, all other groups received subcutaneous injection of CCl 4 1. Rat liver fibrosis model induced by peanut oil mixture (1:9), 2 times a week, 4.0 ml each time, for 12 consecutive weeks. From the 5th week, the corresponding drugs (10.0 ml / kg) were fed into the groups respectively, once a day for 9 consecutive weeks. The rats were sacrificed 24 hours after the last administration, the serum was separated, and the...
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