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Preparation method of human serum albumin

A technology of human serum albumin and human plasma, which is applied in the field of preparation of human serum albumin, can solve the problems of large volume of ultrafiltration dialysis water for injection, damage of protein precipitated particles, and less than 200 micrograms per liter, etc., and achieve an increase in product yield , reduce the amount of use, and recover the effect of thorough

Inactive Publication Date: 2012-07-04
WUHAN ZHONGYUAN RUIDE BIOLOGICAL PROD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the prior art, low-temperature ethanol technology is often used to separate plasma proteins, and centrifugation is often used to separate components. It has the following disadvantages: one is the influence of centrifugal shear force on protein, and the centrifugal separation speed is generally above 14,000 revolutions per minute. , the damage caused by ultra-high-speed shear force to protein precipitated particles may cause changes in the three-dimensional structure of the protein; the second is to use ultra-high-speed centrifugation for centrifugation, generally reaching above 14,000 rpm, and the heat produced by the machine needs to be close to -30 °C. Provide a cold environment around the drum of the centrifuge to reduce the heat generated by the ultra-high-speed rotation of the drum and prevent protein denaturation due to heat
On the other hand, the main components of the depth filter plate used for pressure filtration are cellulose fiber, diatomaceous earth, perlite, etc., and aluminum ions are also released into the product; and there is also a large volume of ultrafiltration dialysis water for injection. Defect: In order to remove the aluminum ions introduced in the production process, in the ultrafiltration process of the production process, at least 10 times the water for injection of the first concentrated solution needs to be repeatedly dialyzed, so that it is possible to make the aluminum ions in the product less than 200 micrograms per liter, And even if the dialysis multiple is increased, the aluminum ion will always be greater than 100 μg / L

Method used

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  • Preparation method of human serum albumin
  • Preparation method of human serum albumin

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Step 1, Precipitate Components I+II+III: Thaw cryogenically frozen plasma into a liquid state, add 95% by volume of -15°C medicinal ethanol to a final ethanol concentration of 20%, and use pH4.0 buffer Adjust pH to 6.2, plasma protein content to 5.0%, control temperature to -5°C, stir for 2 hours, let stand for 5 hours, add diatomaceous earth and perlite to the mixture at 20g / L as a filter aid, use Separation by pressure filtration, collecting the precipitate I+II+III of the separation components by filtration for the preparation of human immunoglobulin, and collecting the supernatant by filtration to enter the next step;

[0026] The second step, precipitation component IV: the filter press supernatant collected in the previous step is adjusted to pH 6.0 with pH 4.0 buffer solution, and the volume fraction is 95%-15 ℃ medicinal ethanol is added until the volume of the final ethanol reaches 40% of the total volume of the press-filtered supernatant and medicinal ethanol ...

Embodiment 2

[0035] The first step is to separate components I+II+III: using human plasma as the raw material, melting low-temperature frozen human plasma into a liquid state, adding 95% by volume of medicinal ethanol at -15°C, to the final ethanol quality The volume reaches 20% of the total volume of the mixed solution of human plasma and medicinal ethanol, and at the same time, the pH of the mixed solution of human plasma and medicinal ethanol is adjusted to 6.3 with a buffer solution of pH 4.0, so that the plasma protein content is 5.0%, and the temperature is adjusted to -5 ℃, stirred for more than 2 hours, and after standing for more than 4 hours, diatomaceous earth was added to the mixture at a rate of 20g / L as a filter aid, and the components I+II+III were separated by pressure filtration separation method, and the components were collected I+II+III precipitation is used for the preparation of human immunoglobulin, and the press-filtered supernatant is collected for the next step;

...

Embodiment 3

[0043] The first step is to separate components I+II+III: thaw low-temperature frozen human plasma into a liquid state, add 95% by volume of -15°C medicinal ethanol, until the final volume of ethanol reaches the volume of human plasma and medicinal 20% of the total volume of the ethanol mixture, while adjusting the pH of the human plasma and medicinal ethanol mixture to 6.4 with a buffer solution of pH 4.0 to make the mass content of plasma protein 5.0%, adjust the temperature to -5°C, and stir for 8 hours , let it stand for 12 hours, add diatomaceous earth or perlite or a combination of the two into the mixed solution as a filter aid at a rate of 20g / L, and use a pressure filtration separation method to separate the precipitate of component I+II+III, and collect component I +II+III precipitation is used for the preparation of human immunoglobulin, and the press-filtered supernatant is collected for the next step;

[0044] In the second step, fraction IV is separated, and the ...

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Abstract

The invention relates to a method for separating and extracting protein in a biological product technology, in particular to a preparation method of human serum albumin. The preparation method comprises the following steps of: separating components I, II and III, separating a component IV, separating a component V, and refining and purifying; and performing ultrafiltration, pasteurization and sterilized filling, examining a finished product, and packaging the qualified product by pasting a label, boxing and the like. According to the preparation method disclosed by the invention, a relatively-moderate pressure-filtration separation method is adopted, so that the molecular structure of the protein is not influenced, and the human serum albumin with high quality is ensured to be prepared; moreover, the product yield is greatly increased, the human serum albumin which is low in aluminum ion content or even does not contain aluminum ions can be provided for clinical application, and the quality of the human serum albumin is improved.

Description

technical field [0001] The invention relates to a protein separation and extraction method in biological product technology, in particular to a preparation method of human serum albumin. Background technique [0002] Human plasma albumin (HPA) is a single-chain non-glycoprotein composed of 585 amino acids, with a molecular weight of 66KD. It is the most abundant protein in plasma. The main physiological function of HPA in the human body is to maintain blood osmotic pressure and carry blood A variety of ligands (including fatty acids, amino acids, steroids, metal ions and drugs) have physiological functions such as exchange with tissues, and are mainly used clinically for surgical blood transfusion and rehydration of critically ill patients, and for the treatment of traumatic shock, fever, edema, and hypoalbuminemia It is an important clinical drug, and it is also the protein drug with the largest output and largest dosage so far. At present, the clinical use of HPA is huge....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07K14/765C07K1/36C07K1/34C07K1/30
Inventor 田健生徐健生王玉兵
Owner WUHAN ZHONGYUAN RUIDE BIOLOGICAL PROD CO LTD
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