Preparation for polysaccharide selenite and application thereof

A technology of selenite and selenate, applied in the direction of medical preparations containing active ingredients, organic active ingredients, drug combinations, etc., can solve the problem of low selenium content, cumbersome preparation, and low selenium content of polysaccharide selenite problems, to achieve the effect of high product yield and quality, and a wide range of physiological functions

Inactive Publication Date: 2008-01-16
陈艺新
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation of this method is loaded down with trivial details, and the selenium content that obtains is also very low
And the preparation of polysaccharide selenite is to realize (CN1288899A) by the sulfate ester group of polysaccharide sulfate radical substitution polysaccharide sulfate by selenite, cause the selenium content of polysaccharide selenite except being limited by reaction conditions, also be affected by the sulfate ester of polysaccharide sulfate. Group content control causes the selenium content of polysaccharide selenite prepared by this method to be low, and its maximum selenium content is 12.5%

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1 In vitro detection of polysaccharide selenite anticancer drug susceptibility test by MTT method:

[0026] Cells in the logarithmic growth phase were diluted to 2.0×106 cells mL-1 with RPMI-1640 medium containing 10% fetal bovine serum, inoculated in a 96-well plate, 100 μL per well, and then added the drug to be tested and the negative control in sequence group, positive control group, and keep the blank group with medium only. Subsequently, culture was continued for 24 hours in an incubator at 37° C. and 5% CO 2 , and then 10 μL of 5 mg·mL −1 MTT solution was added to each well, and culture was continued for 4 hours. Aspirate the supernatant, add 100 μL of DMSO to each well, and measure the absorbance (A) value with a microplate reader at a wavelength of 570 nm. Calculate the cell proliferation inhibition rate with the following formula, and use the formula T / C (%)=100×A 阴性 / A 样品 The half inhibitory concentration (IC50) inhibitory rate=(A 空白 -A 给药 ) / A 空...

Embodiment 2

[0028] Example 2 Antioxidant activity research

[0029] 1. to O 2 · The scavenging effect

[0030] Contains polysaccharide selenite (1mg·mL -1 ) Tris-HCl buffer solution of pH 8.2 was incubated at 25°C for 20 minutes, and 0.1mol·L -1 10mmol·L of pyrogallol -1 Hydrochloric acid solution, shake quickly, measure the absorbance at 319nm at 25°C, and continuously measure A p .

[0031] Do not add polysaccharide selenite, operate as above, measure its contrast absorbance value A s . The test showed that the absorbance A p Relative Absorbance A s reduce.

[0032] The results showed that: polysaccharide selenite can effectively scavenge active oxygen.

[0033] 2. Scavenging effect on hydroxyl radicals and protecting DNA

[0034] Using the Fenton system, take 0.2mL FeSO4-EDTA mixed solution (10mmol L -1 ) into the test tube, add 0.5mL of DNA (10mmol·L -1 ), then add polysaccharide selenite (0.8mg·mL -1 ), with phosphate buffer (pH 7.4, 0.1mol L -1 ) to 1.8M L, add 0.2mLH...

Embodiment 3

[0037] Example 3 Dextrin selenite

[0038]Under stirring, 1g dextrin, 0.1g CH 3 OOS 2 h 5 and 25g selenium oxyfluoride (SeOF 2 ) into pyridine, heated to 100°C, reacted for 24 hours, and added water. The reaction solution was lowered to room temperature, and ethanol was added to the reaction solution according to 3 times the volume of the reaction solution, and stirred; filtered, then washed with ethanol, and dried the filtrate; dissolved the filtrate, and adjusted the pH of the solution with NaOH solution 7 to 8, then add ethanol, filter, then wash the filtrate with ethanol, and dry the product. The product is refined by dialysis. Dextrin selenite containing 45% selenium was prepared.

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PUM

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Abstract

Disclosed are a preparation method and the applications of a polysaccharide selenous acid ester, belonging to the polysaccharide selenide technical field. The invention is characterized in that the polysaccharide selenous acid ester is made essentially by reaction between polysaccharide or carbohydrate complex and selenide reagent which is selenium Oxyhalide or the compound contains the selenium Oxyhalide. Feeding molar ratio of the selenide reagent and hydroxyl groups in the polysaccharide is 1:0.1-20. The invention also comprises the applications of the polysaccharide selenous acid ester in preparing anticancer drug and ant-oxidation drug. The polysaccharide selenous acid ester is produced by the reaction between the selenium reagent and the hydroxyl groups in sugar units, but not by selenite radicals substituting sulfate groups of the polysaccharide sulfate. The yield and the quality of the product are both higher than that of the products produced by other methods, and the selenium content is much higher than that of the products produced by the present technique.

Description

technical field [0001] The invention belongs to the technical field of selenized polysaccharides, and in particular relates to a preparation method and application of polysaccharide selenite. Background technique [0002] Polysaccharides are another important biological macromolecule in addition to proteins and nucleic acids in organisms. They have anti-infection, immune promotion, tumor prevention and treatment, viral hepatitis, rheumatoid disease, AIDS and other immune damage or immune deficiency diseases and anti-oxidation. Various functions and biological activities. Structural factors that affect the biological activity of polysaccharides include the properties of the main chain of polysaccharides, the properties of branched chains, and the higher-order structure of polysaccharide molecules. The composition of sugar units in the main chain of polysaccharides and the type of glycosidic bonds directly determine the activity of polysaccharides. The degree of polymerizatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B37/00A61K31/715A61P35/00
Inventor 陈艺新
Owner 陈艺新
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