CN109824777A - A kind of monoclonal antibody and its preparation method and application with inhibition vitreous-body-retina fibrosis lesion effect - Google Patents

A kind of monoclonal antibody and its preparation method and application with inhibition vitreous-body-retina fibrosis lesion effect Download PDF

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CN109824777A
CN109824777A CN201910197628.8A CN201910197628A CN109824777A CN 109824777 A CN109824777 A CN 109824777A CN 201910197628 A CN201910197628 A CN 201910197628A CN 109824777 A CN109824777 A CN 109824777A
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antibody
mouse
monoclonal
vitreous
ctgf
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张朔
王卓实
李雪娇
张明琦
张敏
李怀超
张鹏
贾爽
赵洪礼
何向东
何伟
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He University
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He University
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Abstract

The present invention provides a kind of with the monoclonal antibody and its preparation method and application for inhibiting the effect of vitreous-body-retina fibrosis lesion.The monoclonal antibody is anti-human CTGF monoclonal's antibody, and the antibody fragment of anti-human CTGF monoclonal's antibody includes single chain variable fragment, Fab, Fab ', F (ab ') 2 or nano antibody.Monoclonal antibody of the invention can be specifically bound with the CTGF in blood in human body, body fluid, to have the function that inhibit CTGF that cell is promoted to form micro-pipe, to prevent and treat vitreous-body-retina fibrosis lesion, suitable for preparing the monoclonal antibody drug for the treatment of vitreous-body-retina fibrosis lesion.

Description

It is a kind of with inhibit the effect of vitreous-body-retina fibrosis lesion monoclonal antibody and Preparation method and application
Technical field
The present invention relates to monoclonal antibody technique fields, more particularly to one kind to have inhibition vitreous-body-retina fibrotic disease Monoclonal antibody being changed into and its preparation method and application.
Background technique
Connective Tissue Growth Factor (Connective tissue growth factor, CTGF) is promoted after tissue damage The important cytokine formed into fibrotic scar, can express in the histoorgans such as the heart, brain, kidney, lung, liver and placenta. In No. 6 chromosome long arm, including 5 exons and 4 intrones, encoding albumen is by 349 for the mankind CTGF assignment of genes gene mapping The molecular mass of a Amino acid profile is the secretion peptide rich in cysteine of 36~38kD, with transforming growth factor-β (TGF- β) there is close relationship, can be considered the downstream reaction element of TGF-β.In cicatrization, organ fibrosis, Atherosclerosis In the diseases such as change, systemic sclerosis, wound repair and some good, malignant tumours, CTGF has different degrees of expression up-regulation.
In addition, the pathologic processes such as the generation of CTGF and fibrotic disease, development have close relationship, it has also become alternative The new targeted cellular elements of TGF-β treatment fibrotic disease.The difference of CTGF site of action, the biological effect of performance is not yet Together, it is mainly shown as and cell mitogen and hyperplasia, chemotactic cell, inducing cell adherency is promoted to promote the conjunction of extracellular matrix At.CTGF can also adjust angiogenesis, induce cell apoptosis.
Ocular tissue's fibrosis is relatively conventional in ophthalmology disease, glaucoma filtration operation, eye traumas, diabetic keratopathy view Also the fibrosis of tissue is directed to after film lesion and vitrectomy.Due to the particularity of eye structure, especially Operation and wound cause blood-eye barrier to destroy, corneal injury, and vasopermeability increases, and make fibrinogen, inflammatory cell, at fibre It ties up cell migration to enter intraocularly, is then changed into fibrin under thrombin action.Ocular tissue caused by various factors damages is fine Dimensionization causes irreversible side effect to vision restoration, so inhibiting the fibrosis of injury tissue, mitigating cicatrization is to guarantee The key of eyesight and global problem.
Proliferative vitreoretinopathy (proliferative vitreoretinopathy, PVR) is a kind of because of inflammation Disease, damage, excessive prosthetic disease caused by ischemic, disease incidence reaches 10% in retinal detachment patients, and essence is Intraocular fibrosis.In ophthalmology, it further includes diabetic retina in addition to PVR that fibrotic disease, which is a kind of ophthalmology refractory disease, Lesion proliferation period, the neovascular membranes of retina, preretinal membrane, glaucoma filtering operation avascular filtering bleb fibrosis etc., these are all It is that disease incidence is high, endangers serious blinding eye disease.However, there are many complication and secondary work for existing clinical commonly used drug With other kinds for the treatment of method some is only limitted to animal experiment stage, still up for further clinical research.
Therefore, it needs to find and a kind of more useful resists intraocular fibrosis approach.
Summary of the invention
The purpose of the present invention is to provide a kind of monoclonal with inhibition vitreous-body-retina fibrosis lesion effect is anti- Body and its preparation method and application, the monoclonal antibody can effectively inhibit the vitreous-body-retina fiber due to caused by CTGF Change lesion.
An aspect of of the present present invention provides a kind of monoclonal antibody with inhibition vitreous-body-retina fibrosis lesion effect, The monoclonal antibody be anti-human CTGF monoclonal's antibody, the antibody fragment of anti-human CTGF monoclonal's antibody include it is single-stranded can Become area's segment, Fab, Fab ', F (ab ') 2 or nano antibody.
Further, the antibody fragment merges or is modified agent modification with other peptide or protein matter.
It is anti-that another aspect of the present invention provides a kind of monoclonal with inhibition vitreous-body-retina fibrosis lesion effect The preparation method of body, comprising: obtain nucleic acid sequence recombined human CTGF antigen protein as shown in SEQ ID NO:1;With described heavy Mouse is immunized in group people CTGF antigen protein, and separation obtains splenocyte in the mouse after being immunized;By the mouse boosting cell with Homology myeloma cell mixes, and carries out film fusion using PEG, forms hybridoma;Screen the hybridization of successfully film fusion Oncocyte carries out in-vitro multiplication culture, hybridoma is inoculated in mouse peritoneal, from the mouse after inoculation after the predetermined time The monoclonal antibody is obtained in ascites.
Further, the step of obtaining the monoclonal antibody from the ascites of the mouse after inoculation includes: to the abdomen Water is slightly purified;It dialyses to the product slightly purified;It is purified using product of the HPLC method to the dialysis, In, the purifying uses anionic exchange medium, and using mobile phase A and Mobile phase B as eluent, flow velocity is 1~3mL/min, benefit It is eluted with gradient elution mode, 35~40 DEG C of column temperature, Detection wavelength 280nm;The mobile phase A is trihydroxy methyl amino first Alkane buffer, the Mobile phase B are the mixed solution of TRIS buffer and sodium chloride.
Further, the step of mouse being immunized with the recombined human CTGF antigen protein includes: in the recombined human CTGF Freund's complete adjuvant is added in antigen protein, first immunisation injection is carried out to mouse;In the recombined human CTGF antigen protein Incomplete Freund's adjuvant is added, booster immunization injection is carried out to the mouse after first immunisation.
Further, by 1 × 108A mouse boosting cell and 2~3 × 107A homology myeloma cell mixes.
Application of the monoclonal antibody provided by the invention in preparation treatment vitreous-body-retina fibrosis lesion drug.
Further, the vitreous-body-retina fibrosis lesion includes: glaucoma filtration operation, eye traumas, glycosuria Caused vitreous-body-retina fibrosis lesion after characteristic of disease retinopathy and vitrectomy.
Compared with prior art, the beneficial effects of the present invention are:
It is provided by the invention excellent with inhibiting the monoclonal antibody of vitreous-body-retina fibrosis lesion effect to have It in conjunction with activity and/or neutralization activity, can specifically bind with the CTGF in blood in human body, body fluid, to remove CTGF, press down CTGF processed promotes cell to form micro-pipe, and then the process of barrier fibers, protects retinal tissue, reaches prevention and treatment hyperplasia Property vitreous-body-retina fibrosis lesion effect, the monoclonal suitable for preparing treatment vitreous-body-retina fibrosis lesion is anti- Body drug.
Detailed description of the invention
Fig. 1 is the flow chart that the embodiment of the present invention prepares anti-human CTGF monoclonal's antibody.
Fig. 2A is the electrophoresis result figure of the expression and purification of CTGF recombinant protein;
Wherein, FT is to flow through liquid component;W1-W3 is low concentration elution component;MW is protein Marker;E1- E9 is purpose PROTEIN C TGF difference appearance time electrophoresis result.
Fig. 2 B is the quantitative electrophoresis result of 2 μ g destination protein CTGF.
Fig. 3 is the monoclonal antibody reduction SDS-PAGE electrophoresis result of purifying;
Wherein, M is protein Marker;1 is anti-human CTGF monoclonal's antibody.
Fig. 4 is the WB result of anti-human CTGF monoclonal's antibody and antigens c TGF specific binding.
Fig. 5 is invasive ability figure of anti-human CTGF monoclonal's antibody to Rat Smooth Muscle;
Wherein, A is normal cell culture, and cell number is the 1605/visual field;B is that IgG, cell is added in lower layer's culture medium Number is the 998/visual field;C is that anti-human CTGF monoclonal's antibody 1 is added in lower layer's culture medium, and cell number is the 727/visual field;D is Anti-human CTGF monoclonal's antibody 2 is added in lower layer's culture medium, cell number is the 562/visual field.
Specific embodiment
Now, example embodiment is more fully described with reference to the accompanying drawings, wherein some exemplary embodiments are shown in the accompanying drawings Out.
The embodiment of the present invention provides a kind of monoclonal antibody with inhibition vitreous-body-retina fibrosis lesion effect, Its specific antigen is nucleic acid sequence as shown in SEQ ID NO:1, amino acid sequence people CTGF as shown in SEQ ID NO:2.
The monoclonal antibody is anti-human CTGF monoclonal's antibody, the antibody fragment packet of anti-human CTGF monoclonal's antibody Include single chain variable fragment, Fab, Fab ', F (ab ') 2 or nano antibody.
The antibody fragment merges or is modified agent modification with other peptide or protein matter.
Have the monoclonal for inhibiting the effect of vitreous-body-retina fibrosis lesion anti-below with reference to Fig. 1 to Fig. 5 detailed description The preparation method of body.
Referring to Fig.1, the embodiment of the present invention provides a kind of preparation method of anti-human CTGF monoclonal's antibody, comprising:
In step S10, nucleic acid sequence recombined human CTGF antigen protein as shown in SEQ ID NO:1 is obtained.
As an example, the preparation method of recombined human CTGF antigen protein is as follows:
1, by bioinformatics method, retrieval obtains CTGF nucleic acid sequence such as SEQ ID NO:1 in ncbi database It is shown.According to this nucleic acid sequence information, the DNA of artificial synthesized CTGF.
2, using the DNA of the artificial synthesized CTGF as template, PCR amplification is carried out.
PCR primer is as follows:
P1:GAATTCATGACCGCCGCCAGTATG
P2:GCGGCCGCTCATGCCATGTCTCCGTA
PCR system is as follows: 5 μ L, dNTP Mixture of Ex Taq (5U/ μ L) 0.25 μ L, 10 × Ex Taq Buffer (2.5mM) 4 μ L, Template 1 μ L, upstream primer P1 (10 μM) 1 μ L, downstream primer P2 (10 μM) 1 μ L, ddH2O complements to 50 μL。
PCR amplification condition: 93 DEG C of denaturation temperature, 55 DEG C of annealing temperature, 72 DEG C of elongating temperature, 30~40 circulations, the time It is 2~3 hours.
3, obtained PCR product is linked on pATX2 with EcoR/Not I double digestion method, while 6*His label is added, Construction recombination plasmid.
4, it will be cultivated after the Transfected Recombinant Plasmid HEK293 cell, sample is collected after six days and carry out SDS-PAGE Electrophoresis detection and protein immunoblotting (western blotting) detection, inspection result obtain expression strain.
5, strain is expressed described in mass propgation and obtains recombined human CTGF antigen protein through affinitive layer purification.
The recombined human CTGF antigen protein of acquisition is made into PAGE gel electroresis appraisal, electrophoresis result such as Fig. 2A and Fig. 2 B It is shown.E1-E9 is purpose PROTEIN C TGF antigen protein difference appearance time electrophoresis result in Fig. 2A, and Fig. 2 B indicates that applied sample amount is 2 μ When g, the quantitative electrophoresis result of destination protein CTGF.By the visible indistinct band of Fig. 2 B, concentration reaches requirement.
General strong biological (Wuhan) Science and Technology Ltd. is sent to carry out genetic test the recombined human CTGF antigen protein of acquisition, Nucleic acid sequence is as shown in SEQ ID NO:1, and amino acid sequence is as shown in SEQ ID NO:2, it can be seen that, successfully synthesize recombination People's CTGF antigen protein.
It should be appreciated that the molecular biology method using this field routine obtains people CTGF antigen protein, the present invention couple This is not construed as limiting.
In step S20, mouse is immunized with the recombined human CTGF antigen protein of acquisition, and separate and obtain in the mouse after being immunized Obtain splenocyte.
As an example, selecting 6~8 week old Balb/c mouse is immune animal, it is immune to carry out recombined human CTGF antigen protein Injection stimulates corresponding bone-marrow-derived lymphocyte activation, is proliferated and is divided into sensitization bone-marrow-derived lymphocyte.
Preferably, 8 week old Balb/c mouse are immunized with the recombined human periostin antigen protein of acquisition.
In one embodiment, the step of mouse being immunized with the recombined human CTGF antigen protein includes: in the recombination Freund's complete adjuvant is added in people's CTGF antigen protein, first immunisation injection is carried out to mouse;In the recombined human CTGF antigen Incomplete Freund's adjuvant is added in albumen, booster immunization injection is carried out to the mouse after first immunisation.
As an example, Freund's complete adjuvant is added in recombined human CTGF antigen protein, by every 10~100 μ g recombined human of mouse The dosage of CTGF antigen protein carries out first immunisation, and the nape of the neck for being injected in mouse is subcutaneous (multiple spot) or intraperitoneal.
Booster immunization uses the recombined human CTGF antigen protein of one half-value dose of first immunisation, and incomplete Freund's adjuvant is added, Booster immunization is carried out, the nape of the neck for being injected in mouse is subcutaneous (multiple spot) or intraperitoneal.It takes within 7~10 days blood to survey potency after immune, adds After being immunized 3~4 times by force, separation obtains mouse boosting cell.
Preferably, first immunisation is carried out by the dosage of every 50 μ g recombined human CTGF antigen protein of mouse, is injected in mouse Subcutaneous 4 points of the nape of the neck;Booster immunization is carried out by the dosage of every 25 μ g recombined human CTGF antigen protein of mouse, is injected in small Subcutaneous 4 points of the nape of the neck of mouse.Blood is taken within 8 days to survey potency after immune, after booster immunization 4 times, separation obtains mouse boosting cell.
In step S30, the mouse boosting cell is mixed with homology myeloma cell, is utilized PEG (polyethylene glycol) Film fusion is carried out, hybridoma is formed.
As an example, the mouse boosting cell and homology myeloma for obtaining separation are thin using hybridoma cell fusion technology Born of the same parents mix, and carry out film fusion using PEG, form hybridoma.
Preferably, by 1 × 108A mouse boosting cell and 2~3 × 107A homology myeloma cell mixes.
As an example, pressing 1 × 108A mouse boosting cell and 3 × 107A homology myeloma cell mixes.
It should be appreciated that can be anti-using hybridoma cell fusion technology and Cloning Technology the preparation secretion of this field routine The hybridoma cell strain of purpose antigen CTGF.
In step S40, the hybridoma of successfully film fusion is screened, in-vitro multiplication culture is carried out, it is inscribed in mouse peritoneal Kind hybridoma, obtains the monoclonal antibody from the ascites of the mouse after inoculation after the predetermined time.
Preferably, it is greater than 1.5 through ELISA detection OD495, is successfully the hybridoma of film fusion.
As an example, the screening of hybridoma positive cell and cloning: in HAT (H-Hypoxanthine hypoxanthine, A- Aminopterin methopterin, T-Thymidine thymidine) the miscellaneous of successfully film fusion is screened on selective medium Friendship oncocyte, in-vitro multiplication culture, and in time to mouse (non-immune conventional mouse, such as 8 week old Balb/c mouse) abdominal cavity Interior inoculation hybridoma prepares ascites, and ascites is extracted after about 1~2 week, obtains a large amount of thick monoclonal antibodies.Here, extraction Ascites is the mouse ascites containing a large amount of thick monoclonal antibodies.
In addition, being purified to thick monoclonal antibody.
Preferably, the step of obtaining the monoclonal antibody from the ascites of the mouse after inoculation can include: to the abdomen Water is slightly purified;It dialyses to the product slightly purified;It is purified using product of the HPLC method to the dialysis.
As an example, carrying out salt to the mouse ascites containing monoclonal antibody using saturated ammonium sulfate solution based on salting out method Analysis.
Specifically, the mouse ascites stoste containing a large amount of thick monoclonal antibodies is subjected to first time low-temperature centrifugation processing (4 DEG C, 10000rpm, 15min), to remove cell residue and particulate matter etc., supernatant obtained by first time low-temperature centrifugation is used 0.02mol/L, pH value be 7.2 phosphate buffer be diluted to 5 times (that is, the first time low-temperature centrifugation obtained by supernatant with The volume ratio of the phosphate buffer is 1:4, and the total volume after being diluted to 5 times is denoted as sample volume) after, in ice bath stirring Under, saturated ammonium sulfate solution is added to final concentration of 50% (v/v) (that is, the sample volume and the saturated ammonium sulfate solution Volume ratio be 1:1), saltout in 4 DEG C 4 hours, and carry out second (4 DEG C, 10000rpm, 15min) of low-temperature centrifugation processing, abandon Supernatant obtains solids.Then, 0.02mol/L, pH value is used to dissolve second of low-temperature centrifugation institute for 7.2 phosphate buffer Solids is obtained, the volume of the phosphate buffer is equal with the sample volume, and under ice bath stirring, saturation sulphur is added dropwise Acid ammonium solution (here, the initial value of the concentration of saturated ammonium sulfate solution is 1g/mL) extremely final concentration of 33.33% (v/v) (that is, The volume ratio of dissolved total volume and the saturated ammonium sulfate solution is 2:1), it saltouts in 4 DEG C overnight, and it is low to carry out third time (4 DEG C, 10000rpm, 15min) processing of temperature centrifugation, abandon supernatant and obtain solids, third time low-temperature centrifugation obtained solid object is made For the thick purification sample of gained of saltouing, i.e., the product slightly purified.
As an example, being dialysed using TRIS buffer to the product slightly purified.
Specifically, gained after using 0.025mol/L, pH value to saltout for 7.2 TRIS buffer dissolution Thick purification sample, the volume of the TRIS buffer are equal with the sample volume;Then it is using concentration During which 0.025mol/L, the TRIS buffer that pH value is 7.2 need to change 3 three hydroxyls in 4 DEG C of dialysed overnights Aminomethane buffer, molecular cut off 150KD, to obtain the product of dialysis.
As an example, utilizing HPLC method (High Performance Liquid Chromatography, high-efficient liquid phase color Spectrometry) product of dialysis is purified.The purifying uses anionic exchange medium, is elution with mobile phase A and Mobile phase B Liquid, flow velocity are 1~3mL/min, are eluted using gradient elution mode, 35~40 DEG C of column temperature, Detection wavelength 280nm;It is described Mobile phase A is that pH value is 6.5~8.5, and concentration is the buffer of the trishydroxymethylaminomethane of 10~50mmol/L;The flowing Phase B is that pH value is 6.5~8.5, the final concentration of 10~50mmol/L of trishydroxymethylaminomethane and sodium chloride final concentration of 0.5~ The mixed solution of 1mol/L.
Preferably, using Thermo Propac-wax-10 chromatographic column, the granularity of filler is about 10 μm, chromatographic column specification For 250mm × 4.6mm, select mobile phase A and Mobile phase B be eluent, flow velocity 1mL/min, using gradient elution mode into Row elution, 40 DEG C of column temperature, Detection wavelength 280nm;The mobile phase A is that pH value is 7, and concentration is the trihydroxy methyl of 30mmol/L Aminomethane buffer solution;The Mobile phase B is that pH value is 7, the final concentration of 30mmol/L of TRIS buffer and The mixed solution of the final concentration of 1mol/L of sodium chloride.Chromatographic column is connected, chromatographic column is balanced with mobile phase A.Loading, loading Gradient program is executed afterwards to isolate and purify sample, carries out gradient elution by the elution program of table 1, collecting retention time is 22 ~24 minutes eluting peaks obtain anti-human CTGF monoclonal's antibody of purifying.Yield is 85.2%, purity 97.4%.
Table 1: gradient elution program
It should be appreciated that can also be purified using the purification process of this field routine to monoclonal antibody, the present invention couple This is not construed as limiting.
Anti-human CTGF monoclonal's antibody after purification of acquisition is subjected to reduction SDS-PAGE electrophoresis detection, as a result such as Fig. 3 Shown, as seen from Figure 3, reducing agent, which opens the disulfide bond of antibody, is broken the heavy chain of antibody and light chain, forms two clear items Band, and without other bands, illustrate anti-human CTGF monoclonal's antibody purity after purification it is high, without other foreign proteins.
The experiment of anti-human CTGF monoclonal's antibody of the embodiment of the present invention is described below in detail.
One, anti-human CTGF monoclonal's antibody titer detects.
The anti-human CTGF monoclonal's antibody after purification obtained in the present embodiment is subjected to potency using ELISA experimental method Detection, it is known that anti-human CTGF monoclonal's antibody concentration is 100 μ g/mL.Method is as follows:
1, the ELISA Plate of appropriate hole count is taken to carry out antigen embedding, by each of suitable CTGF albumen coating to ELISA Plate Hole;
2, it is cleaned ELISA Plate 3~5 times with rinsing liquid, it is anti-that the anti-human CTGF monoclonal after purification that the present embodiment obtains is added Body, 37 DEG C of incubation 1h;
3, rinsing liquid cleans 5 times, be added with horseradish peroxidase mark or alkaline phosphatase target secondary antibody (for example, Sheep anti-mouse igg), 37 DEG C of incubation 1h, rinsing liquid cleans 5 times;
4, be added substrate develop the color 10~20min, be added terminate liquid (for example, 2M sulfuric acid), terminate reaction, using microplate reader into Row OD value is read, and the results are shown in Table 2.
Table 2: anti-human CTGF monoclonal's antibody titer testing result
Note: antibody 1 and antibody 2 are the anti-human CTGF monoclonal's antibody obtained in different mouse ascites.
As can be seen from Table 2, antibody 1 and 2 potency of antibody are all up 1:64000, and the potency of antibody 2 is better than antibody 1.
Two, the combination activity of protein immunoblot experiment detection anti-human CTGF monoclonal's antibody and CTGF albumen.
1, CTGF albumen is prepared, SDS-PAGE electrophoresis is carried out;
2, transferring film, NC film or pvdf membrane;
3, closing 2h is carried out with BSA or skimmed milk power;
4, it is added primary antibody (anti-human CTGF monoclonal's antibody 1 of preparation of the embodiment of the present invention), 37 DEG C, 1h;
5, it is cleaned 3~5 times, each 10min with rinsing liquid, addition ELIAS secondary antibody, 37 DEG C, 40min;
6, substrate reactions colour developing or ECL developing solution tabletting development is added.
As a result as shown in figure 4, from fig. 4, it can be seen that antibody 1 can specifically bind people's CTGF albumen, for anti-human CTGF antibody.
Three, anti-human CTGF monoclonal's antibody neutralization detection (Transwell method).
1, the low culture medium of serum content is put into the cell of upper layer.
2, the high culture medium of serum content is put into lower layer.It is respectively put into anti-human CTGF monoclonal's antibody 1, anti-human in a lower layer CTGF monoclonal antibody 2 or IgG, blank are not put into antibody.
3, the film of bottom can be such that cell passes through in the cell of upper layer.
4, the cell invasion condition of production is observed after spreading rat smooth muscle cell, is photographed to record.
As a result as shown in figure 5, A is the culture of 10%FBS normal cell, lower layer is not put into antibody, by photo visible cell number For the 1605/visual field;B is that (10%FBS+300 μ g/L lgG monoclonal is anti-for addition lgG monoclonal antibody in lower layer's culture medium Body), it is the 998/visual field by photo visible cell number;C is that anti-human CTGF Dan Ke prepared by the present invention is added in lower layer's culture medium Grand antibody 1 (10%FBS+300 μ g/L monoclonal antibody 1) is the 727/visual field by photo visible cell number;D is lower layer's culture Anti-human CTGF monoclonal's antibody 2 (10%FBS+300 μ g/L monoclonal antibody 2) prepared by the present invention is added in base, it can by photo See that cell number is the 562/visual field.
By above-mentioned experimental result, show that anti-human CTGF monoclonal's antibody of preparation of the embodiment of the present invention has high activity, The invasive growth of rat smooth muscle cell can effectively be inhibited.
Anti-human CTGF monoclonal's antibody of preparation of the embodiment of the present invention has high activity, and CTGF can be inhibited to promote cell micro- Pipe is formed and cell fibrosis, so that fibrosis be avoided to form caused vitreoretinopathy.
Although being particularly shown and describing the present invention, those skilled in the art referring to its exemplary embodiment It should be understood that in the case where not departing from the spirit and scope of the present invention defined by claim form can be carried out to it With the various changes in details.
<110>Liaoning He Shi medical college
<120>a kind of with inhibiting monoclonal antibody and preparation method thereof of vitreous-body-retina fibrosis lesion effect and answer With
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CACACAACAA CTCTTCCCCG CTGAGAGGAG ACAGCCAGTG CGACTCCACC CTCCAGCTCG 60
ACGGCAGCCG CCCCGGCCGA CAGCCCCGAG ACGACAGCCC GGCGCGTCCC GGTCCCCACC 120
TCCGACCACC GCCAGCGCTC CAGGCCCCGC CGCTCCCCGC TCGCCGCCAC CGCGCCCTCC 180
GCTCCGCCCG CAGTGCCAAC CATGACCGCC GCCAGTATGG GCCCCGTCCG CGTCGCCTTC 240
GTGGTCCTCC TCGCCCTCTG CAGCCGGCCG GCCGTCGGCC AGAACTGCAG CGGGCCGTGC 300
CGGTGCCCGG ACGAGCCGGC GCCGCGCTGC CCGGCGGGCG TGAGCCTCGT GCTGGACGGC 360
TGCGGCTGCT GCCGCGTCTG CGCCAAGCAG CTGGGCGAGC TGTGCACCGA GCGCGACCCA 420
TGCGACCCGC ACAAGGGCCT ATTCTGTCAC TTCGGCTCCC CGGCCAACCG CAAGATCGGC 480
GTGTGCACCG CCAAAGATGG TGCTCCCTGC ATCTTCGGTG GTACGGTGTA CCGCAGCGGA 540
GAGTCCTTCC AGAGCAGCTG CAAGTACCAG TGCACGTGCC TGGACGGGGC GGTGGGCTGC 600
ATGCCCCTGT GCAGCATGGA CGTTCGTCTG CCCAGCCCTG ACTGCCCCTT CCCGAGGAGG 660
GTCAAGCTGC CCGGGAAATG CTGCGAGGAG TGGGTGTGTG ACGAGCCCAA GGACCAAACC 720
GTGGTTGGGC CTGCCCTCGC GGCTTACCGA CTGGAAGACA CGTTTGGCCC AGACCCAACT 780
ATGATTAGAG CCAACTGCCT GGTCCAGACC ACAGAGTGGA GCGCCTGTTC CAAGACCTGT 840
GGGATGGGCA TCTCCACCCG GGTTACCAAT GACAACGCCT CCTGCAGGCT AGAGAAGCAG 900
AGCCGCCTGT GCATGGTCAG GCCTTGCGAA GCTGACCTGG AAGAGAACAT TAAGAAGGGC 960
AAAAAGTGCA TCCGTACTCC CAAAATCTCC AAGCCTATCA AGTTTGAGCT TTCTGGCTGC 1020
ACCAGCATGA AGACATACCG AGCTAAATTC TGTGGAGTAT GTACCGACGG CCGATGCTGC 1080
ACCCCCCACA GAACCACCAC CCTGCCGGTG GAGTTCAAGT GCCCTGACGG CGAGGTCATG 1140
AAGAAGAACA TGATGTTCAT CAAGACCTGT GCCTGCCATT ACAACTGTCC CGGAGACAAT 1200
GACATCTTTG AATCGCTGTA CTACAGGAAG ATGTACGGAG ACATGGCATG AAGCCAGAGA 1260
GTGAGAGACA TTAACTCATT AGACTGGAAC TTGAACTGAT TCACATCTCA TTTTTCCGTA 1320
AAAATGATTT CAGTAGCACA AGTTATTTAA ATCTGTTTTT CTAACTGGGG GAAAAGATTC 1380
CCACCCAATT CAAAACATTG TGCCATGTCA AACAAATAGT CTATCAACCC CAGACACTGG 1440
TTTGAAGAAT GTTAAGACTT GACAGTGGAA CTACATTAGT ACACAGCACC AGAATGTATA 1500
TTAAGGTGTG GCTTTAGGAG CAGTGGGAGG GTACCAGCAG AAAGGTTAGT ATCATCAGAT 1560
AGCATCTTAT ACGAGTAATA TGCCTGCTAT TTGAAGTGTA ATTGAGAAGG AAAATTTTAG 1620
CGTGCTCACT GACCTGCCTG TAGCCCCAGT GACAGCTAGG ATGTGCATTC TCCAGCCATC 1680
AAGAGACTGA GTCAAGTTGT TCCTTAAGTC AGAACAGCAG ACTCAGCTCT GACATTCTGA 1740
TTCGAATGAC ACTGTTCAGG AATCGGAATC CTGTCGATTA GACTGGACAG CTTGTGGCAA 1800
GTGAATTTGC CTGTAACAAG CCAGATTTTT TAAAATTTAT ATTGTAAATA TTGTGTGTGT 1860
GTGTGTGTGT GTATATATAT ATATATGTAC AGTTATCTAA GTTAATTTAA AGTTGTTTGT 1920
GCCTTTTTAT TTTTGTTTTT AATGCTTTGA TATTTCAATG TTAGCCTCAA TTTCTGAACA 1980
CCATAGGTAG AATGTAAAGC TTGTCTGATC GTTCAAAGCA TGAAATGGAT ACTTATATGG 2040
AAATTCTGCT CAGATAGAAT GACAGTCCGT CAAAACAGAT TGTTTGCAAA GGGGAGGCAT 2100
CAGTGTCCTT GGCAGGCTGA TTTCTAGGTA GGAAATGTGG TAGCCTCACT TTTAATGAAC 2160
AAATGGCCTT TATTAAAAAC TGAGTGACTC TATATAGCTG ATCAGTTTTT TCACCTGGAA 2220
GCATTTGTTT CTACTTTGAT ATGACTGTTT TTCGGACAGT TTATTTGTTG AGAGTGTGAC 2280
CAAAAGTTAC ATGTTTGCAC CTTTCTAGTT GAAAATAAAG TGTATATTTT TTCTATAAA 2339
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Met Thr Ala Ala Ser Met Gly Pro Val Arg Val Ala Phe Val Val Leu Leu Ala
1 5 10 15
Leu Cys Ser Arg Pro Ala Val Gly Gln Asn Cys Ser Gly Pro Cys Arg Cys Pro
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Asp Glu Pro Ala Pro Arg Cys Pro Ala Gly Val Ser Leu Val Leu Asp Gly Cys
40 45 50
Gly Cys Cys Arg Val Cys Ala Lys Gln Leu Gly Glu Leu Cys Thr Glu Arg Asp
55 60 65 70
Pro Cys Asp Pro His Lys Gly Leu Phe Cys His Phe Gly Ser Pro Ala Asn Arg
75 80 85 90
Lys Ile Gly Val Cys Thr Ala Lys Asp Gly Ala Pro Cys Ile Phe Gly Gly Thr
95 100 105
Val Tyr Arg Ser Gly Glu Ser Phe Gln Ser Ser Cys Lys Tyr Gln Cys Thr Cys
110 115 120 125
Leu Asp Gly Ala Val Gly Cys Met Pro Leu Cys Ser Met Asp Val Arg Leu Pro
130 135 140
Ser Pro Asp Cys Pro Phe Pro Arg Arg Val Lys Leu Pro Gly Lys Cys Cys Glu
145 150 155 160
Glu Trp Val Cys Asp Glu Pro Lys Asp Gln Thr Val Val Gly Pro Ala Leu Ala
165 170 175 180
Ala Tyr Arg Leu Glu Asp Thr Phe Gly Pro Asp Pro Thr Met Ile Arg Ala Asn
185 190 195
Cys Leu Val Gln Thr Thr Glu Trp Ser Ala Cys Ser Lys Thr Cys Gly Met Gly
200 205 210 215
Ile Ser Thr Arg Val Thr Asn Asp Asn Ala Ser Cys Arg Leu Glu Lys Gln Ser
220 225 230
Arg Leu Cys Met Val Arg Pro Cys Glu Ala Asp Leu Glu Glu Asn Ile Lys Lys
235 240 245 250
Gly Lys Lys Cys Ile Arg Thr Pro Lys Ile Ser Lys Pro Ile Lys Phe Glu Leu
255 260 265 270
Ser Gly Cys Thr Ser Met Lys Thr Tyr Arg Ala Lys Phe Cys Gly Val Cys Thr
275 280 285
Asp Gly Arg Cys Cys Thr Pro His Arg Thr Thr Thr Leu Pro Val Glu Phe Lys
290 295 300 305
Cys Pro Asp Gly Glu Val Met Lys Lys Asn Met Met Phe Ile Lys Thr Cys Ala
310 315 320
Cys His Tyr Asn Cys Pro Gly Asp Asn Asp Ile Phe Glu Ser Leu Tyr Tyr Arg
325 330 335 340
Lys Met Tyr Gly Asp Met Ala
345

Claims (8)

1. a kind of with the monoclonal antibody for inhibiting the effect of vitreous-body-retina fibrosis lesion, which is characterized in that the Dan Ke Grand antibody is anti-human CTGF monoclonal's antibody, and the antibody fragment of anti-human CTGF monoclonal's antibody includes single-stranded variable region piece Section, Fab, Fab ', F (ab ') 2 or nano antibody.
2. monoclonal antibody according to claim 1, which is characterized in that the antibody fragment and other peptide or protein matter Merge or be modified agent modification.
3. a kind of preparation method with the monoclonal antibody for inhibiting the effect of vitreous-body-retina fibrosis lesion, feature exist In, comprising:
Obtain nucleic acid sequence recombined human CTGF antigen protein as shown in SEQ ID NO:1;
Mouse is immunized with the recombined human CTGF antigen protein, and separation obtains mouse boosting cell in the mouse after being immunized;
The mouse boosting cell is mixed with homology myeloma cell, film fusion is carried out using PEG, it is thin to form hybridoma Born of the same parents;
The hybridoma for screening successfully film fusion, carries out in-vitro multiplication culture, hybridoma is inoculated in mouse peritoneal, in advance The monoclonal antibody is obtained after fixing time from the ascites of the mouse after inoculation.
4. preparation method according to claim 3, which is characterized in that obtain the list from the ascites of the mouse after inoculation The step of clonal antibody includes:
The ascites is slightly purified;
It dialyses to the product slightly purified;
It is purified using product of the HPLC method to the dialysis,
Wherein, the purifying uses anionic exchange medium, and using mobile phase A and Mobile phase B as eluent, flow velocity is 1~3mL/ Min is eluted using gradient elution mode, and 35~40 DEG C of column temperature, Detection wavelength 280nm;
The mobile phase A be TRIS buffer, the Mobile phase B be TRIS buffer and The mixed solution of sodium chloride.
5. preparation method according to claim 3 or 4, which is characterized in that immune with the recombined human CTGF antigen protein The step of animal includes:
Freund's complete adjuvant is added in the recombined human CTGF antigen protein, first immunisation injection is carried out to mouse;
Incomplete Freund's adjuvant is added in the recombined human CTGF antigen protein, the mouse after first immunisation is carried out reinforcing exempting from Epidemic disease injection.
6. preparation method according to claim 3 or 4, which is characterized in that press 1 × 108A mouse boosting cell and 2~3 ×107A homology myeloma cell mixes.
7. application of the monoclonal antibody described in claim 1 in preparation treatment vitreous-body-retina fibrosis lesion drug.
8. application according to claim 7, which is characterized in that the vitreous-body-retina fibrosis lesion includes: green light Caused vitreous-body-retina after eye filtering surgery, eye traumas, diabetic retinopathy and vitrectomy Fibrosis lesion.
CN201910197628.8A 2019-03-15 2019-03-15 A kind of monoclonal antibody and its preparation method and application with inhibition vitreous-body-retina fibrosis lesion effect Pending CN109824777A (en)

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* Cited by examiner, † Cited by third party
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WO2024079310A1 (en) * 2022-10-14 2024-04-18 Ebbil, Ltd. Sil-6r and ctgf binding proteins and methods of use thereof

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112626063A (en) * 2020-12-18 2021-04-09 上海药明生物技术有限公司 Method for preparing hybridoma by enriching mouse plasma cells by using CD138+ biomarker and application
WO2024079310A1 (en) * 2022-10-14 2024-04-18 Ebbil, Ltd. Sil-6r and ctgf binding proteins and methods of use thereof

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