WO1992016645A1 - PROTEIN PRODUCTION FROM IMMORTAL CELLS GROWN $i(IN VIVO) - Google Patents
PROTEIN PRODUCTION FROM IMMORTAL CELLS GROWN $i(IN VIVO) Download PDFInfo
- Publication number
- WO1992016645A1 WO1992016645A1 PCT/GB1992/000459 GB9200459W WO9216645A1 WO 1992016645 A1 WO1992016645 A1 WO 1992016645A1 GB 9200459 W GB9200459 W GB 9200459W WO 9216645 A1 WO9216645 A1 WO 9216645A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- antibody
- host animal
- compromised
- immune response
- protein
- Prior art date
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Classifications
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N5/00—Undifferentiated human, animal or plant cells, e.g. cell lines; Tissues; Cultivation or maintenance thereof; Culture media therefor
- C12N5/10—Cells modified by introduction of foreign genetic material
- C12N5/12—Fused cells, e.g. hybridomas
- C12N5/16—Animal cells
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K16/00—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N2510/00—Genetically modified cells
- C12N2510/02—Cells for production
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N2510/00—Genetically modified cells
- C12N2510/04—Immortalised cells
Definitions
- This invention relates to a method of producing proteins.
- the invention enables the production of large amounts of monoclonal antibodies, which can then be purified, giving a much higher yield of antibody than conventional methods used at present.
- the technology for both the production and purification of monoclonal antibodies is well described; this invention in part relates to a method of making monoclonal antibodies more cheaply than conventional methods.
- the invention enables the production, in vivo, of monoclonal antibodies which have hitherto only been producible in vitro.
- T cell subsets and/or blocking of antigens which are essential to T cell activation.
- monoclonal antibodies in clinical transplantation, and in human autoimmune disease, is largely experimental, but the potential clinical applications are diverse (reviewed by
- the in vitro method is useful because any cell type can be grown if the correct culture medium is used, but the concentration of antibody in the supernatant fluid is very low (depending on the cell type and the in vitro system used) .
- the concentration in supernatant fluid of cultured cells may be approximately 100 to 200 ⁇ g/ml) .
- Purification of the antibody is expensive and time consuming, all the more so when it is realised that the culture medium generally has to be supplemented with irrelevant proteins, such as, for example, with 5% foetal calf serum. It would also be difficult to purify the antibody in such concentrations that the injection of the correct amount of antibody would not lead to fluid overload problems in the clinical setting.
- the in vivo method has some advantages over the above in vitro system.
- the concentration of antibody is approximately an order of magnitude higher in the ascitic fluid than in the tissue culture fluid.
- Most murine hybridomas grown up in mice give antibody concentrations of 5 to lOmg/ml in ascitic fluid.
- the disadvantage of this method is that mice are small animals and each animal produces a maximum of about 10ml of ascites.
- a more important problem is that only wholly mouse-derived mouse hybridomas can be grown in mice. Human-mice hybridomas do not grow in the mouse peritoneal cavity, presumably because they are rejected. Since many of the clinically important monoclonal antibody-producing cell lines are of non-murine origin, the latter problem is significant.
- This invention relates in part to solving the problem of producing monoclonal antibodies in vivo in an animal of choice.
- the invention can be used to produce large amounts of monoclonal antibodies. If hybrid cells could be grown in animals larger than mice, such as rabbits or guinea pigs, much more ascites would be produced.
- the problem is that the hybrid cells would need to grow in the peritoneal cavity of a host animal which is of a different species. This is essentially the same problem as growing dual- species hybridomas (such as human-mouse) in any animal and producing humanised or other hybrid antibodies.
- a method of producing protein-producing the method comprising culturing an immortal antibody-producing cell line in vivo in a host animal, at least one of the protein and the cell being wholly or partially of a different species discordantly related to the host animal, wherein the humoral immune response and the cell- mediated immune response of the host animal are compromised.
- the protein (which term includes glycoproteins and other proteins which have been modified post-translationally) can be any protein which it is desired to produce.
- the protein should not have a significantly adverse effect on the host animal and should have a sufficiently long half life in the host animal for recovery to be a practicable proposition; apparent difficulties with either of these considerations, though, may be overcome by a number of ways, such as producing the protein in a precursor or inactivated form, which subsequently could be converted into the protein of interest.
- the protein can be any protein which can be secreted from the cell line, the capabilities of recombinant DNA technology make the type of protein to which the invention can apply virtually limitless.
- proteins which may be produced by the invention include ⁇ -fetoprotein, blood factors such as Factor VIII, erythropoietin and insulin, each of which may be from practically any species, but will often be of human origin.
- the cell line can be any line which can be established in vivo in a host animal and which secretes the protein of interest.
- the species of the host animal does not have to be matched to that of the cell line.
- suitable cell lines include BHK, CHO and, especially, COS cells, as well as many others, suitable transformation techniques are well known in the art.
- One of the most important embodiments of the invention relates to the production of antibody.
- An immortal antibody-producing cell line will for preference be a hybridoma cell line, which will usually originally have been formed by fusing an antibody-forming cell with an appropriate tumour line.
- EB Epstein-Barr
- the cell line need not be indefinitely immortal, although this may be preferred. Immortality is only necessary to enable enough antibody to be accumulated within the host animal prior to harvesting.
- the immortal ceil line is cultured in vivo. The most suitable location is within the peritoneal cavity. After an appropriate culture period, antibody may then be harvested, and purified as appropriate, for example from the ascitic fluid.
- the host animal can be of any suitable species. If the aim is to produce large amounts of the monoclonal antibodies, animals larger than mice can be used. Suitable animals may include guinea pigs, rabbits or even such larger animals as sheep, pigs and cattle. However, if the invention is being used not primarily to produce large quantities of antibodies, but rather to provide a suitable host animal for a hybrid cell or hybrid antibody (as discussed below) , any suitable species including such small animals as mice can be used.
- At least one of the antibody and the cell is wholly or partially of a different species, which is discordantly related to the host animal.
- the antibody can be "partially" of a different species if it is a hybrid, that is to say if it has different regions being derived from different species, and one of the species is different from the host animal.
- “Humanised” antibodies are an example.
- the cell can be “partially” of a different species if, for example, it is a hybridoma derived from two different species. A human-mouse hybridoma would be an example. -5
- the different species is discordantly related to the host animal. This is a term derived from the field of tissue grafts across species barriers. Rejection of tissue across species barriers is known as xenogeneic rejection. 0 Species combinations are either discordant or concordan .
- a concordant species difference means that vascularised organs transplanted from one species into another are rejected in days and not minutes or hours (Calne Transplant Proc 2:550, 1970).
- An example of a concordant 5 species difference is the hamster to rat combination.
- Discordant species are species combinations in which vascular organs are rejected in minutes, as in the rat to guinea pig combination.
- T cells do not recognise discordant antigen presenting cells directly, and that cellular rejection of discordant grafts might be easier to inhibit than cellular rejection of allogeneic grafts (Yoshizawa et al , Journal of Immunol . 132:2820, 1984, Alter et al , J. Exp. Med. 171:333, 1990, Bogaerde et al , Transplantation January 1991, Pierson et al , J. Exp. Med. 170:991, 1989).
- discordantly related species are only distantly related to each other, and the mechanisms of rejection of a xenograft from one to another are predominantly humoral (Bogaerde, and White, Mechanism of Xenograft Rejection, in press) .
- the humoral immune response is that which causes cell destruction either as a result of activation by antibodies of the classical pathway of complement or as a result of direct activation via the alternative pathway.
- the humoral immune response is compromised, in this invention, so as to prevent antibody complement mediated hyperacute rejection of discordant tissue.
- Antibody depletion is one method; it has been achieved by plasmaphoresis, ex vivo perfusion of donor organs with recipient blood and by using protein A columns (reviewed in "Xenograft 25", Editor Mark Hardy, Elsevier 1989) . None of these depletion regimes achieved long term survival of discordant organ grafts.
- Another, and preferable, approach is to deplete the complement components by administration (for example by injection) of a complement inhibitor such as Cobra Venom Factor (CoF) , which leads to extension of discordant graft survival.
- a complement inhibitor such as Cobra Venom Factor (CoF)
- the complement inhibitor may either prevent the activation of complement or remove it, or one or more of its components.
- the complement inhibitor will inhibit both the classical and alternative pathways of complement activation, so it is preferred that the complement inhibitor act to block the pathway at C3, whether by inhibition or removal.
- antibodies for example monoclonal antibodies
- Other useful complement inhibitors include soluble decay activating factor (DAF) and soluble membrane cofactor protein (MCP) .
- DAF soluble decay activating factor
- MCP soluble membrane cofactor protein
- the most preferred complement inhibitor is cobra venom factor. It has been shown that long term survival of hamster hearts in rats is possible by continued injection of CoF in spite of high levels of anti-hamster antibody (antibody titre 1/16000) .
- the anti-hamster antibody in these animals was capable of causing hyperacute rejection when injected into rats with beating hamster hearts which had not received CoF. Depletion of complement was therefore successful in inducing long term survival of vascular organ grafts in the face of elevated antibody levels.
- Complement inhibitors such as cobra venom factor will generally be given parenterally and for this purpose will generally be sterile.
- Cobra venom factor itself may be formulated in phosphate buffered saline (without azide) or any other suitable solvent or carrier. It may be that oral formulations can be developed.
- the concentration of complement inhibitor in a pharmaceutical formulation will again depend on the ultimate intended dose, which will be under the control of the experimenter.
- a preparation of cobra venom factor in azide- free PBS can be made at a concentration ranging from 0.05 mg/ml up to the limit of solubility, which will be dependent on its purity.
- Compositions having a concentration up to 5 mg/ml may be useful in practice, for example those having a concentration of from 0.1 to 2 mg/ml, for example about 0.5 mg/ml.
- CoF is however very expensive, and this form of therapy may not be commercially viable in the bulk production of monoclonal antibodies.
- the most preferred way to compromise the antibody- mediated immune response is for the host animal to be congenitally compromised. Fortunately congenitally complement deficient animals already exist and others may be identified. C3, C4 and C2 deficient guinea pigs have been successfully bred, as well as C5 deficient rabbits. C3 deficient dogs are known to exist. These animals would be unable to activate the classical pathway or, in the preferred case of the C3 deficient animals such as guinea pigs or dogs, both the classical and he alternative pathway.
- the cell-mediated immune response is that which causes cell destruction as a result of action of cells of the haematopoietic system either directly or as a result of targeting by antibody or non-specific factors.
- Procedures can be borrowed from the treatment of recipients of transplanted tissue. These include irradiation, thymectomy, the use of pharmacological agents such as cyclosporines or azathioprine, and monoclonal or polyclonal antibody therapy.
- One of the most effective and easiest methods is by administering (for example by injection) cyclosporin A.
- Other compounds having cyclosporin A-like activity can be used.
- Such compounds will be well known to those skilled in the art and include cyclosporins other than cyclosporin A, such as cyclosporin C and cyclosporin G.
- Eicosanoids also have cyclosporin A-like activity and include PGI 2 (prostacyclin) , PGE 2 , PGD 2 and FK 506 (Fujisawa) .
- Compound FK 506 is one of those that is preferred for use in the present invention, but the most preferred is cyclosporin A itself. Cyclosporin A is available from Sandoz under the trademark SANDIMUN. Administration of cyclosporin A has the advantage of being economic.
- Cyclosporin A and other immunosuppressants with cyclosporin A-like activity will usually be administered parenterally in the practice of the present invention. In such cases, the preparation containing the immunosuppressant will be sterile. However, cyclosporin IC A itself, and some other immunosuppressants, may be administered orally, in which case sterility is not essential. Cyclosporin A itself is only sparsely soluble in water and for practical purposes it is preferred to dissolve it in an oil, such as a vegetable oil. Olive 5 oil has been found to be acceptable in practice.
- the immunosuppressant may be dissolved in any appropriate physiologically acceptable carrier. In 0 some cases, dissolution may not even be necessary.
- concentration at which the immunosuppressant is prepared will of course depend on the nature of the immunosuppressant itself and the intended dose, which will generally be under the guidance of the experimenter. 5 As a general guide, however, it has been found appropriate to prepare formulations of the cyclosporin at a concentration of from 1 to 200 mg/ml, for example from 5 to 150 mg/ml, typically from 20 to 100 mg/ml.
- parenteral injection The preferred site of injection is muscle, because of the depot effect resulting from an intramuscular injection. Intravenous injection, however, may be appropriate in some circumstances and subcutaneous injection may have some if not all of the advantages of intramuscular injection. Intraperitoneal injection could be used if circumstances dictate.
- FIGURE 1 shows a Fluorescence-Activated Cell Sorting (FACS) profile showing mouse R73 antibody-producing cells having been grown in ascitic fluid in the peritoneal cavity of C3 deficient guinea pigs;
- FACS Fluorescence-Activated Cell Sorting
- FIGURE 2 shows a FACS profile of the negative control, namely the absence of R73 antibody- producing cells grown in normal guinea pigs;
- FIGURE 3 shows a FACS profile of the positive control, namely the presence of R73 antibody- producing cells in tissue culture supernatant.
- the murine cell line which produces the monoclonal antibody R73 (available from Dr. Thomas Hunig, University of Oxford, was used. This antibody stains all rat T cell receptor positive rat T cells. Guinea pigs which were congenitally depleted of the C3 component of complement were used as the recipients. (Guinea pigs and rats are discordantly related; rat hearts transplanted into guinea pigs are rejected hyperacutely (Adachi et al, Transplant. Proc. 19:1145 (1987)).) Five days before the injection of the cell line the guinea pigs received an intraperitoneal injection of 3ml pristane. Incomplete Freunds Adjuvant (IFA) can also be used.
- IFA Incomplete Freunds Adjuvant
- pristane (2,6,10,14- ecramethylpentadecane, Sigma) or IFA is used as a standard procedure to prepare the peritoneal cavity of mice ' before ascites producing cells are introduced into the peritoneal cavity.
- pristane 2,6,10,14- ecramethylpentadecane, Sigma
- IFA is used as a standard procedure to prepare the peritoneal cavity of mice ' before ascites producing cells are introduced into the peritoneal cavity.
- Five days after the injection of pristane 10 7 R73 producing cells which had been growing in tissue culture were injected into the peritoneal cavity of the animals. Cyclosporin A was also injected intramuscularly on the same day at a dose of lOOmg/kg, and cyclosporin A injections were given every day for 2 weeks in the same dose.
- Figure 1 shows that in accordance with the invention murine R73 antibody-producing cells can be grown in ascites fluid in C3 deficient guinea pigs.
- Figure 3 shows that in accordance with the invention murine R73 antibody-producing cells can be grown in ascites fluid in C3 deficient guinea pigs.
- Figure 2 shows that hybridoma tissue culture supernatant but not when an attempt is made to grow the cells in normal guinea pigs.
- Example l The procedure of Example l was repeated, except that C4- deficient guinea pigs were used. Growth of tumour cells was again seen in the peritoneal cavity of all animals. There was no macroscopically obvious difference in tumour growth between the C3 and the C4 deficient animals.
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- Health & Medical Sciences (AREA)
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- Genetics & Genomics (AREA)
- Engineering & Computer Science (AREA)
- General Health & Medical Sciences (AREA)
- Zoology (AREA)
- Wood Science & Technology (AREA)
- Bioinformatics & Cheminformatics (AREA)
- Biotechnology (AREA)
- Biochemistry (AREA)
- Biomedical Technology (AREA)
- Immunology (AREA)
- Proteomics, Peptides & Aminoacids (AREA)
- Cell Biology (AREA)
- Molecular Biology (AREA)
- Microbiology (AREA)
- Medicinal Chemistry (AREA)
- Biophysics (AREA)
- General Engineering & Computer Science (AREA)
- Preparation Of Compounds By Using Micro-Organisms (AREA)
- Medicines Containing Antibodies Or Antigens For Use As Internal Diagnostic Agents (AREA)
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Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4506038A JPH06505628A (en) | 1991-03-15 | 1992-03-16 | Protein production by immortalized cells grown in vivo |
NO933268A NO933268D0 (en) | 1991-03-15 | 1993-09-14 | PROCEDURE FOR MANUFACTURING PROTEIN FROM DEADLY CELLS CULTIVATED IN VIVO |
FI934026A FI934026A (en) | 1991-03-15 | 1993-09-14 | PROTEINFRAMSTAELLNING AV IN VIVO ODLADE ODOEDLIGA CELLER |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB919105532A GB9105532D0 (en) | 1991-03-15 | 1991-03-15 | Antibody production |
GB9105532.7 | 1991-03-15 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1992016645A1 true WO1992016645A1 (en) | 1992-10-01 |
Family
ID=10691646
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/GB1992/000459 WO1992016645A1 (en) | 1991-03-15 | 1992-03-16 | PROTEIN PRODUCTION FROM IMMORTAL CELLS GROWN $i(IN VIVO) |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP0579621A1 (en) |
JP (1) | JPH06505628A (en) |
AU (1) | AU1372192A (en) |
CA (1) | CA2104787A1 (en) |
FI (1) | FI934026A (en) |
GB (1) | GB9105532D0 (en) |
WO (1) | WO1992016645A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1996029410A1 (en) * | 1995-03-22 | 1996-09-26 | Zeneca Limited | In vivo generation of antibodies against antigens secreted in a host by transfected mel cells |
US6982168B1 (en) | 1996-02-02 | 2006-01-03 | The United States Of America As Represented By The Department Of Health And Human Services | Immortal human prostate epithelial cell lines and clones and their applications in the research and therapy of prostate cancer |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2495938A1 (en) * | 1980-12-13 | 1982-06-18 | Hayashibara Biochem Lab | PROCESS FOR THE PRODUCTION OF HUMAN ADRENOCORTICOTROPIC HORMONE |
WO1992000100A1 (en) * | 1990-06-22 | 1992-01-09 | E.I. Du Pont De Nemours And Company | Improved ascites production of monoclonal antibodies using an immunosuppressive anti-cd4-related antibody |
-
1991
- 1991-03-15 GB GB919105532A patent/GB9105532D0/en active Pending
-
1992
- 1992-03-16 AU AU13721/92A patent/AU1372192A/en not_active Abandoned
- 1992-03-16 CA CA 2104787 patent/CA2104787A1/en not_active Abandoned
- 1992-03-16 EP EP19920906601 patent/EP0579621A1/en not_active Withdrawn
- 1992-03-16 WO PCT/GB1992/000459 patent/WO1992016645A1/en not_active Application Discontinuation
- 1992-03-16 JP JP4506038A patent/JPH06505628A/en active Pending
-
1993
- 1993-09-14 FI FI934026A patent/FI934026A/en not_active Application Discontinuation
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2495938A1 (en) * | 1980-12-13 | 1982-06-18 | Hayashibara Biochem Lab | PROCESS FOR THE PRODUCTION OF HUMAN ADRENOCORTICOTROPIC HORMONE |
WO1992000100A1 (en) * | 1990-06-22 | 1992-01-09 | E.I. Du Pont De Nemours And Company | Improved ascites production of monoclonal antibodies using an immunosuppressive anti-cd4-related antibody |
Non-Patent Citations (1)
Title |
---|
ROGER H. KENNETT ET AL. 'MONOCLONAL ANTIBODIES.HYBRIDOMAS:A NEW DIMENSION IN BIOLOGICAL ANALYSES' 1981 , PLENUM PRESS , NEW YORK AND LONDON * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1996029410A1 (en) * | 1995-03-22 | 1996-09-26 | Zeneca Limited | In vivo generation of antibodies against antigens secreted in a host by transfected mel cells |
US6982168B1 (en) | 1996-02-02 | 2006-01-03 | The United States Of America As Represented By The Department Of Health And Human Services | Immortal human prostate epithelial cell lines and clones and their applications in the research and therapy of prostate cancer |
Also Published As
Publication number | Publication date |
---|---|
JPH06505628A (en) | 1994-06-30 |
FI934026A0 (en) | 1993-09-14 |
AU1372192A (en) | 1992-10-21 |
EP0579621A1 (en) | 1994-01-26 |
CA2104787A1 (en) | 1992-09-16 |
FI934026A (en) | 1993-09-14 |
GB9105532D0 (en) | 1991-05-01 |
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