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The method of producing mielopid

The method of producing mielopid
IPC classes for russian patent The method of producing mielopid (RU 2041716):
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(57) Abstract:

The invention relates to medicine, in particular, to a method for immunomodulator of mielopid. The proposed method is that cells in the bone marrow pigs are cultivated in a nutrient medium, separating the supernatant by centrifugation, the latter is subjected to ultrafiltration membranes with a threshold permeability 10.000 Yes at temperatures from +4°C to room temperature, then concentrated by lyophilization, hold gel chromatography on Sephadex G 25, selected fractions with molecular weight of 600 to 3000 D re-concentrated by lyophilization. The proposed method is compared with the known, allows you to get mielopid more immunostimulatory activity that entails a reduction in therapeutic doses of the drug and increasing the number of doses received from the same number of bone marrow cells. table 2.

The invention relates to medicine, namely to immunology and can be used in the production of immunologically active drug mielopid.

Described is a method of obtaining mielopid, formerly known as stimulator antitelomerase, by separating the cells from the bone marrow pigs, their cultivation in mittelhammer on column filled with Sephadex G-50. Faction, erwerbende in release of cytochrome G with a molecular weight of about 13000 Da, concentrated by lyophilization.

Also known is a method of obtaining mielopid by culturing bone marrow cells in a nutrient medium, separating the supernatant by centrifugation, concentration, gelfiltration concentrated supernatant to a column of Sephadex G-25, the sampling fractions (mol.weight of 1000-2000 and desalting on a column of Sephadex C-10. The finished product is dried by lyophilization.

The disadvantage of this method is a little out of the drug (from 1 kg nizatidine bones, 1,0.1010bone marrow cells receive 25-30 doses of the drug) and its low specific activity. Mielopid standardized so that 1 dose of drug contained 3 mg protein, determined by the method of Lowry. The stimulation index was not less than 1.6 at concentrations of 50 µg/ml.

The purpose of the invention increased immunostimulatory activity mielopid.

This objective is achieved in that the bone marrow cells of pigs are cultivated in a nutrient medium, the supernatant is separated by centrifugation, subjected to ultrafiltration membranes hold gel chromatography on Sephadex G-25, selected fractions with molecular weight of 600-3000 Da re-concentrated by lyophilization.

Distinctive perelom of the method is that the selection of the target product are carried out by ultrafiltration on membranes with a threshold permeability of 10,000 Da at a temperature of +4aboutWith up to the room.

In more detail, the method is carried out as follows.

Bone marrow from the rib bones of pigs after their crushing wash by shaking in a thermostatted shaker at 37aboutC for 1 h in serum-free medium 199. Next, cells are washed twice by centrifugation and placed in a medium for culturing. Media for cultivation is based on 199 environment. The cultivation is carried out in a thermostatted shaker or roller installation at 37aboutC for 20 hours, the Supernatant is separated from the cell mass by centrifugation at a temperature of +4aboutWith speeds of 8,000 rpm for 20 min.

The obtained culture supernatant of bone marrow cells subjected to ultrafiltration cassettes firm Millipor" threshold permeability 10000 Da at a temperature of +4aboutWith up to room temperature and the excess pressure of 0.5 ATM system. Received on o dissolved in sterile pyrogen-free water, centrifuged, the clarified concentrate is subjected to microfiltration, and then gel-chromatography on a column filled with Sephadex G-25, the selected fraction with a molecular mass of 600-3000 Da again subjected to lyophilization. From 1 kg of raw material (1,h10cells) receive 250-300 doses of the drug.

Verification of the claimed technical solution for compliance with a criterion of "Inventive step" showed that neither the patent nor in scientific and technical literature not found in the set of features described in the claims.

The following are specific examples of the execution of the method and analysis of the biological properties of mielopid.

P R I m e R 1. 25 kg tipped rib bones of pigs crushed in sterile conditions. To homogenizate add 3 liters of sterile 199 environment. The suspension is shaken on a shaker at 37aboutC for 1 h to flush the bone marrow cells. Filtration separates containing cell supernatant volume of 3 L. the Cells are washed twice by centrifugation 199 medium at the temperature of +4aboutC. the resulting cell volume of 50 ml (15-25.1010) pour 25 l and 199 medium, bringing the cell concentration up to 1010cells/liter and incubated for 20 h at 37aboutaboutC. the Obtained filtrate volume 23 l freeze-dried at a temperature of (-30aboutC)-0aboutC. the Dry product is dissolved at +4aboutWith 350 ml of pyrogen-free sterile water for 30 min under vigorous stirring. Nerastvorim the precipitate was separated by centrifugation at 8000 rpm at +4aboutFor 20 minutes the Supernatant volume of 300 ml sterile filtered over a filter with a pore diameter of 0.2 μm and applied to a column of Sephadex G-25 size h see Gel chromatography is carried out in sterile conditions at +4aboutWith using of the eluate 10 mm phosphate buffer pH 7,00, selecting a fraction (mol. the mass corresponding to 2000 Da. The concentration of mielopid in the resulting eluate was adjusted to 0.1-0.2 mg/ml by adding sterile 10 mm phosphate buffer pH 7.0. The solution mielopid sterile filtered through a filter with a pore diameter of 0.2 μm, poured into vials of 3 ml and freeze-dried at a temperature of (-30)-0aboutC.

The product yield is 300 doses of the drug with a protein content by Lowry 0.3-0.6 mg/dose. The coefficient of stimulation is thus 1,9.

P R I m m e R 2. The method is carried out as described in example 1 but conducting the ultrafiltration on membranes with a threshold permeability 10000 Da when the stimulation of 1.8.

P R I m e R 3. The effect of the stimulation of antibody productions estimate at the peak of the immune response to sheep erythrocytes in vitro, by adding the test material in the cell culture of lymph nodes obtained from mice on the fourth day after immunization.

The stimulation coefficient calculated as the ratio of the number of antibody productive cells (AFC) in the culture with the test sample to the amount of the KLA in the control culture.

Anticlockwise effect of mielopid by the well-known and proposed methods are given in table.1.

From the data table.1 shows that mielopid obtained by the proposed method has a 100-fold greater specific activity.

Anticlockwise effect of mielopid at different temperatures of the ultrafiltration process is shown in table.2.

The process of ultrafiltration at a temperature above room temperature or below +4aboutWith leads to lower output and loss of activity of the drug.

Mielopid obtained by the proposed method is 100 times more specific immunostimulirutuyu activity that can reduce the dose of an administered drug in the treatment and from the same number of bone marrow cells by the CSOs brain pigs, their incubation in a nutrient medium, separation of the supernatant, followed by separation of the target product, wherein the target product is optionally purified by ultrafiltration on membranes with a threshold permeability of 10,000 D and at a temperature from +4oWith up to the room and gelfiltration on Sephadex G-25 and selected fraction with molecular weight of 600 to 3,000 Da.

 

 

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