Background technology
Applicant of the present invention and Shanghai Mei Shan Bioisystech Co., Ltd have applied for a about the product of no endogenous immunoglobulin hepatoma monoclonal antibody, the patent of methods and applications on June 25th, 1999, number of patent application is 99113824.4, and denomination of invention is: liver cancer murine source monoclonal antibody, preparation method and the application thereof of no endogenous immunoglobulin.
At that time, the mouse resource monoclonal antibody that countries in the world produced, no matter be whole molecule or micromolecular, if not serum-free, protein-free medium as culture medium, no matter adopt which kind of production method, the product that is obtained all contains the endogenous immunoglobulin (mouse or ox) of varying degree, this not only difficult quality control and the stdn of product that contains endogenous immunoglobulin, but also containing some unsafe factors.
99113824.4 it is matrix that number patent application successfully provides with the serum-free protein-free medium, prepare the method for the mouse source hepatoma monoclonal antibody of no endogenous immunoglobulin in bio-reactor by the high-density culture mouse hybridoma cell, the cell density of gained is 10
4-6/ ml, antibody concentration is 100% up to the ratio of components in 1mg/ml and the antibody protein.Can be used as the bulk drug of preparation treatment liver cancer preparation.Can avoid with ascites production or with the unstable on the non-constant drug effect of being brought that contains hidden danger in the security of serum nutrient solution production liver cancer monoclonal antibody and monoclonal antibody ratio of components in pharmaceutical protein, as far as our knowledge goes, this is the mouse source hepatoma monoclonal antibody of the no endogenous immunoglobulin that successfully obtains with bioreactor technology for the first time.
The present invention has done improvement on the basis of preceding patent, selected the reactor that is fit to more, has optimized reaction conditions simultaneously, and we have also added some kinds of cell growth factors in nutrient solution in addition, its objective is further raising cell density and antibody yield.The target of any vitro culture all is the biological internal milieu of simulation, cell is grown to greatest extent, and internal milieu is complicated and changeable, various factors is all linked with one another, be difficult to duplicate fully, this is the cell in vitro reason of cultivating the most critical be difficult to reach cells in vivo density just.Somatomedin was the distinctive key factor of a kind of internal milieu originally, added in external environment, can obviously improve the survival rate of cell, and cellular form is improved, and then improved cell density and antibody yield.In the past, it is fewer that people use, and is because cell growth factor also is a kind of protein, in the time of isolating to the end with regard to many one heavy misgivings.But now, can be by separating these rho factors in the purge process of Protein A or G fully, therefore, it is necessary and feasible adding these cell growth factors.
Summary of the invention
The present invention has acted on the technological line of No. 99113824.4 patent applications, and purpose provides the method that the higher production of a kind of productive rate does not have the liver cancer murine source monoclonal antibody of endogenous immunoglobulin.
Therefore, the contriver improves on the basis of 99113824.4 patents, adopts filling bed type cultured continuously reactor, has correspondingly changed the processing condition of reactor.Temperature is 30~40 ℃, and rotating speed is 300-480RPM, and pH is 6.8~7.25, PO
2Be 0.5-1.95 crust, PCO
2Be 0.5-1.95 crust, PN
2Be the 0.5-1.95 crust, air flow quantity is that 0.1-2/ hour, pressure are the 2-5 crust.The most important thing is, the present invention adopts modified form DXL serum-free medium, promptly in the prescription of the DXL of preceding patent serum-free, protein-free medium matter, one or more somatomedins have been added, comprise the nerve growth factor, Urogastron, fibroblast growth factor, the embryo growth factor etc., the content of various somatomedins is the 0.01-0.1 mg/litre, and these somatomedins can be separated in the purge process of afterwards Protein A or G fully.
Production Flow Chart step of the present invention sees Table 1:
Table 1. Production Flow Chart steps flow chart explanation clean environment degree is produced cell bank and is taken out 100,000 grades in Hepama-1 cell
↓ CO in a small amount increases
2100,000 grades of incubators
100,000 grades of ↓ mass production filling bed type reactors
↓ collect training liquid to train centrifugal 100,000 grades of liquid
↓ concentrating low-temperature is vaporized or is distilled 100,000 grades
↓ separation and purification chromatography
100,000 grades of ↓ concentrated vacuum low-pressure low temperature
↓
Concentration, 100,00 grades of purity quality control mouse source DNAs
Intracellular toxin, exogenous factor
100 grades of ↓ filtration packing
Preparation modified form DXL serum-free medium:
Be characterized in having added on the basis of DXL nutrient solution one or more somatomedins, its content is the 0.01-0.1 mg/litre.Modified form DXL serum-free culture liquid formula: mg/litre
VITAMIN B4 0.1-0.5
L-Ala 5-10
Aluminum chloride 0.0005-0.001
Ammonium meta-vanadate 0.0005-0.001
Arginine 100-500
L-asparagine 10-50
Aspartic acid 5-30
Bariumchloride 0.001-0.005
Vitamin H 0.05-0.5
Calcium chloride 10-100
Choline chloride 60 10-100
Potassium chromium sulfate 0.0005-0.005
Citric acid 10-50
Citrulline 1-10
Cobalt chloride 0.001-0.005
Copper sulfate 0.001-0.01
Halfcystine 10-100
Dilinoleic acid Yelkin TTS 0.1-1
Two stearic acid Yelkin TTS 0.1-1
Thanomin 1-10
Edetate 5-10
Polyoxyethylene glycol 0.5-4
Ferrous sulfate 0.5-5
Atom iron 2-5
Flavin adenine dinucleotide 0.01-0.05
Folic acid 1-5
Germanium dioxide 0.0001-0.001
L-glutamic acid 10-50
Glutamine 100-500
Glycine 1-10
Glucose 2000-10000
Histidine 10-100
Xanthoglobulin 1-10
Isoleucine 100-500
Leucine 100-500
Linolic acid 0.01-0.1
Lithium chloride 5-50
Methionin 50-500
Magnesium chloride 50-500
Manganous chloride tetrahydrate 0.00005-0.0005
Methionine(Met) 10-50
Molybdic acid 0.00005-0.0005
MOPS 1000-10000
Inositol 10-50
Niacinamide 1-10
Nickelous nitrate 0.0001-0.0005
Ornithine 1-10
Oxaloacetic acid 1-10
Pantothenic acid 1-5
Phenol red 1-10
Phenylalanine 10-100
Potassium Bromide 0.00005-0.0005
Repone K 100-500
Potassiumiodide 0.00005-0.0005
Proline(Pro) 10-100
Progesterone 0.001-0.01
Putrescine 0.1-0.5
Benadon 0.1-0.5
Pyruvic acid 100-500
Riboflavin 0.01-0.05
Rubidium chloride 0.000005-0.00005
Serine 10-100
Silver chloride 0.000001-0.00001
Sodium-chlor 5000-10000
Sodium Fluoride 0.001-0.01
Sodium Nitroprusside 1-10
Sodium phosphate dibasic 100-1000
Sodium Selenite 0.01-0.05
Spermine 0.1-1
Tin protochloride 0.00005-0.0005
Taurine 10-50
Thioctic Acid 0.08-0.4
VitB1 0.1-0.8
Threonine 8-18
Thymus pyrimidine 0.2-1.5
Titanium chloride 0.0005-0.004
Give birth to plain 0.05-4
Tryptophane 1-10
Tween 80 0.05-3
Tyrosine 25-45
Xie Ansuan 70-120
Vitamins B
122-15
Zinc sulfate 0.6-5
Add:
One or more each 0.01-0.1 mg/litre in the various somatomedins such as Urogastron, the nerve growth factor, fibroblast growth factor or the embryo growth factor.
Cultivate the hybridoma that to secrete the liver cancer murine resource monoclonal antibody with the above-mentioned modified form DXL nutrient solution for preparing.
Take out the Hepama-1 hybridoma through amplification in a small amount from produce cell bank, (inoculating cell density is A * 10 to cell before the phase of taking the logarithm
5/ ml) move into filling bed type cell biological reactor to cultivate monitoring process condition (temperature: 30~40 ℃, rotating speed: 300-480RPM, pH:6.8~7.25, PO
2: 0.5-1.95 crust, PCO
2: 0.5-1.95 crust, PN
2: 0.5-1.95 crust, air flow quantity: the 0.1-2 liter/hour, pressure: 2-5 crust), treat that it is A * 10 to density that antibody concentration is about in 1-1.5mg/ml or the cell biological reactor cell long
8During/ml the left and right sides, collect nutrient solution, the low-temperature distillation method is centrifugal to be concentrated, and obtains primary products.
With HPLC separation and purification primary products,, simultaneously product is carried out quality control again, at last through obtaining the whole molecule monoclonal antibody of the liver cancer murine source monoclonal antibody of no endogenous immunoglobulin after the sterile filtration with low-pressure low-temperature subliming method concentrated product.Use Protein G or Protein A pillar that the somatomedin of adding is separated fully in this step.
In case of necessity, available papoid, stomach en-etc. routinely the enzyme cutting method whole molecule monoclonal antibody that will not have a liver cancer murine source monoclonal antibody of endogenous immunoglobulin be prepared into the liver cancer murine source small molecules monoclonal antibody Fab of no endogenous immunoglobulin or (Fab)
237 ℃ of effects of liver cancer murine source whole molecule monoclonal antibody of the no endogenous immunoglobulin that contains enzymic digestion liquid and equal volume that will prepare earlier, after endonuclease reaction stops, again with 4 ℃ of dialysis of pH8.0 phosphoric acid buffer 12-20 hour, again with the HPLC separation and purification, obtain the liver cancer murine source small molecules monoclonal antibody of no endogenous immunoglobulin at last.
Owing to adopted technical scheme as above, therefore, to compare with preceding patent, this patent has following significant advantage:
1, adopts filling bed type cultured continuously reactor.Its maximum characteristics are, cell distributes in jar and concentrates, and density is big in the effective volume, have reduced cell poor growth or fully long risk when low density, and cell all is adsorbed on the microcarrier, and free considerably less in nutrient solution is convenient to the collection of product.Therefore, at all culturing cells, especially in the bio-reactor of zooblast and hybridoma, microcarrier filling bed type bio-reactor advantage is remarkable, more and more becomes the main flow in the cell culture apparatus.
2, adopt modified form DXL serum-free medium, on the basis of DXL nutrient solution, increased somatomedin, helped to improve yield, and, because these somatomedins can be separated in the purge process of afterwards Protein A or G fully, therefore, do not influence the character of product antibody.
3, the processing condition of bio-reactor have been improved.
Generally speaking, the monoclonal antibody that present method is produced does not wherein contain any mouse endogenous immunoglobulin and any ox endogenous immunoglobulin, and the ratio of components in the antibody protein of monoclonal antibody is 100%, and the yield height, and cell density is 10
6-8/ ml, every liter of yield of training the monoclonal antibody in the liquid reaches 1000-1500mg, meets the requirement of scale operation.
The present invention's one class does not have liver cancer murine resource monoclonal antibody Hepama-1, Hepama-9403, Hepama-9501 (whole molecule and small molecules) or the like of endogenous immunoglobulin, the preparation method is similar, making of liver cancer murine resource monoclonal antibody Hepama-1 with no endogenous immunoglobulin is embodiment below, further illustrate the present invention, but do not limit the scope of the invention.