WO1993011232A1 - Cytokine antagoniste de l'ifn-gamma - Google Patents
Cytokine antagoniste de l'ifn-gamma Download PDFInfo
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- WO1993011232A1 WO1993011232A1 PCT/FR1992/001123 FR9201123W WO9311232A1 WO 1993011232 A1 WO1993011232 A1 WO 1993011232A1 FR 9201123 W FR9201123 W FR 9201123W WO 9311232 A1 WO9311232 A1 WO 9311232A1
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- cytokine
- cells
- dna sequence
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K16/00—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies
- C07K16/18—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans
- C07K16/24—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from animals or humans against cytokines, lymphokines or interferons
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P43/00—Drugs for specific purposes, not provided for in groups A61P1/00-A61P41/00
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K14/00—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
- C07K14/435—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans
- C07K14/52—Cytokines; Lymphokines; Interferons
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K38/00—Medicinal preparations containing peptides
Definitions
- the present invention relates to a new cytokine, a specific antagonist of the induction of expression of class 11 istocompatibility antigens on the surface of cells, by gamma interferon. 5 All the cells of the organism express on their surface glycoproteins called class I histocompatibility antigens.
- glycoproteins expressed only by immunocompetent cells class II histo ⁇ compatibility antigens. These antigens are coded by a family of
- CM. H. major histocompatibility complex
- Class II anti histocompatibility genes play an important role during the immune response, in particular in the context of interactions between B and T cells or between presenting cells
- Interferon gamma promotes the functions of immunocompetent cells by inducing the expression of antigens of the major histo-compatibility complex (C.M.H.) by many cell types (Becker, 1985).
- the capacity to present the antigen is proportional to the quantity of molecules (H.L.A.) class II present on the
- Interferon gamma therefore allows these cells to express enough class II molecules (HLA) to present the antigen.
- HLA class II molecules
- Class II antigens (H.L.A.) are also considered.
- class II antigens are constitutive on cells B. Accolla et Coll. (1985) and De Préval et al. (1,985) have shown that this expression is under the control of a factor which acts in trans at the gene level. 35 A model for regulating class II antigens has been proposed by Boss and Strominger (1986). In this model, there exist at the genomic level in the 5 'flanking region of the gene, successive regions controlling the expression of the histocompatibility antigens: a negative regulatory element, 2 ⁇ positive control regions, and another negative control region.
- the induction efficiency is different depending on the cell system concerned. Indeed, certain cell lines (leukemic line 562, embryonic fibroblasts, etc.) are difficult to duct, or even not inducible, while other lines (adult fibroblasts, colon carcinoma cells, etc.) express H.L.A. antigens. class II after induction with low doses of gamma interferon.
- cytokine which is a specific antagonist of the induction of expression of class II histocompatibility antigens on the surface of cells by gamma interferon, and which - comprises all or part the peptide sequence as described in FIG. 1, as well as the variants retaining the biological activity previously described, and
- the present invention also relates to the variants of this cytokine in particular the variants obtained by deletion in particular of the N or C terminal ends, the variants obtained by substitution of a or more amino acids and the addition variants obtained by adding one or more amino acid (s), for example the amino acid methionine at the N-terminus when the cytokine is expressed in a bacterium.
- the variants of this cytokine in particular the variants obtained by deletion in particular of the N or C terminal ends, the variants obtained by substitution of a or more amino acids and the addition variants obtained by adding one or more amino acid (s), for example the amino acid methionine at the N-terminus when the cytokine is expressed in a bacterium.
- the present invention also relates to the compounds comprising the active epitopes of the cytokine which may or may not be linked together by different sequences, and which are also hereinafter called variants.
- the cytokine can be glycosylated, so as to be able to undergo post-translational modifications, which are of interest for its biological activity in mammalian cells, or non-glycosylated.
- the natural protein has, in addition to the characteristics described above, a molecular weight of the order of 19,000 on SDS polyacrylamide gel, and its inhibitory activity is sensitive to heat and to trypsin.
- the protein is precipitable in a 50% ammonium sulfate solution.
- the protein can be obtained naturally, as a secretion product in the cell culture supernatant. It can also result from the expression of an exogenous DNA sequence in prokaryotic or more advantageously eukaryotic cells.
- the exogenous DNA sequence may in particular be a complementary DNA sequence or else a genomic DNA sequence.
- the DNA sequences according to the invention include the sequences which allow the expression of new cytokines in prokaryotic and eukaryotic host cells.
- the sequences according to the invention relate more precisely to those chosen from: a) the DNA sequence of FIG. 1 or its complementary strands; b) a DNA sequence which hybridizes with the DNA sequences of a) or a part thereof; and c) a sequence which, taking into account the degeneracy of the genetic code codes for a cytokine having the same amino acid sequence as a) or b). d) a sequence which codes for a variant of said cytokine and which retains the biological activity described above.
- the present invention also relates to DNA sequences coding for the expression of variants as described above.
- the invention also relates to hybridizing DNA sequences. to the DNA sequences previously described, or to one or more of their fragments.
- sequences according to the invention may or may not be covenantly associated with a labeled molecule, in particular by isotopic labeling (I 125, etc.) or by non-isotopic labeling (biotin, etc.) so as to be easily detected.
- isotopic labeling I 125, etc.
- biotin biotin, etc.
- the present invention also relates to host cells, eukaryotic or prokaryotic, having undergone a transformation or a transfection with a DNA sequence as previously described, so as to ensure the expression in the host cell of said cytokine.
- the invention also relates to a cloning vector, bioiogically functional, comprising a DNA sequence as described above, as well as the eukaryotic or prokaryotic host cells, transformed or transfected, in a stable manner, by such a cloning vector.
- bioiogically functional cloning vector is intended to denote any vector capable of allowing the expression of the sequence in question in the transformed or transfected host, or else capable of allowing the chromosomal integration of said sequence, and its expression under the control of '' a homologous or heterologous promoter.
- This type of vector is known in the field of recombinant DNAs. It may be a self-replicating plasmid or not, comprising an origin of replication effective in the host, for example the origin of replication of pBR322 for E. coli as well as the elements ensuring the expression of the sequence :
- These plasmids may also include marker genes ensuring selection in particular, or integration sequences comprising homologous sequences ensuring integration by recombination.
- viruses may also be recombinant viruses, for example vector viruses of the vaccinia type.
- the methods of transformation and trans ⁇ fection are known and must be adapted to the host.
- Host cells may also have been modified through vectors to excrete the protein in mature and / or fused form.
- the present invention also relates to a process for preparing the new protein, characterized in that said cytokine is purified from the cell culture supernatant or the cytokine is made to express by prokaryotic or eukaryotic host cells described above, then isolates the desired cytokine.
- the cells are preferably cultivated in an appropriate nutritive medium devoid of the proteins contaminating the serum, the latter being contained in a dialysis bag permeable to molecular weights of less than 50 kD .
- This method can also be used when the host cell is a cell having been treated with a vector as described above, and the culture of which requires the use of serum, although it is preferred to use hosts which grow on a simple medium.
- the cells capable of producing a cytokine according to the invention are quite numerous; among these is the line K562 available from the National Institute of General Medical Sciences under the number GM05372D. However, it is possible to use other cells, in particular carcinomas, or hepatoma cells.
- cell lines such as 562 and its subclones no longer expressing said cytokines are particularly advantageous as host cells.
- the invention also relates to the antibodies, in particular the monoclonal antibodies, directed against the cytokines according to the invention. These antibodies can in particular be used in the context of a diagnosis of the presence of said proteins.
- the invention also relates to an immuno-serum directed against the cytokines previously described.
- cytokines according to the present invention can be used as active principle in a therapeutic composition, in the case where it is desired to increase the antagonistic effect of these proteins with respect to gamma interferon.
- compositions are especially usable in all states requiring modulation of the activity of gamma interferon.
- the compositions according to the present invention can be used in the treatment and / or prevention of certain types of autoimmune diseases, but also during certain surgical procedures such as certain transplants.
- compositions according to the invention may also comprise other monokynes and / or cytokines.
- the invention also relates to a therapeutic composition containing, as active principle, an antibody or an immuno-serum, directed against said cytokine or even antisense corresponding to the coding sequences, this in particular in order to limit the quantities of circulating cytokine.
- the invention also relates to a diagnostic kit for detecting the protein, and comprising at least one antibody directed against it.
- FIG. 1 represents: the nucleotide sequence of complementary DNA corresponding to the inhibitor, and the deduced peptide sequence.
- FIG. 2 represents: 1) on the right: the histograms obtained on a flow cytometer (EC Coulter) for expression of the HLA DR (b) and HLA class I (c) antigens on the K562 cells after induction by gamma interferon glycosylated, at 1000 IU / ml.
- EC Coulter flow cytometer
- HLA class I antigens on the K562 cells after induction by gamma interferon glycosylated, at 1000 IU / ml.
- negative controls without gamma interferon, with or without specific antibodies the curves overlapping).
- FIG. 3 represents: the histograms obtained on a flow cytometer (EC Coulter), for the expression of the HLA DR (b) and HLA class I (d) antigens on the ICIG-7 cells after induction by glycosylated gamma interferon, YES / ml.
- a negative controls without gamma interferon with or without specific antibodies (the curves overlap).
- the figure represents the purification steps: in (A) cell culture, in (B) the curve obtained after MonoQ column, and in (C) the curve obtained after Superose 12.
- the active fractions are located in the hatched parts.
- 562 cells from the pleural effusion of a patient with chronic myeloid leukemia in blast crisis, are grown in complete RPMI-160 medium. The cells are placed in an oven at 37 ° C and 5% CO ... They are seeded at a concentration of 250,000 cells / ml every 72 hours.
- ICIG-7 cells normal human embryonic fibroblast cells (these cells were cultured in our laboratory from normal human embryonic lung), are cultured in a humid oven at 37 ° C and 5% CO-, in full MEM medium. The adherent cells which have reached confluence (at 72 h) are detached from their support by the action of trypsin (0.25% in MEM) 2 to 3 minutes and returned to culture at a density of 80,000 cells / cm 2 .
- 562 cells are grown under the conditions described above; the culture medium is removed after 72 h, centrifuged, filtered through a 0.22 ⁇ m filter and supplemented with 10% of FCS and 2 mM of gluta ine.
- Interferon gamma IFN-Gamma
- the non-glycosylated recombinant gamma interferon produced from E. bacteria. Coli is obtained from the company Biogen (GENEVA, SWITZERLAND) and its specific activity is 2.10 IU / rng.
- the cells (562 or ICIG-7) are grown in
- ICIG-7 cells are induced under the conditions described in the previous paragraph, but, in the presence of conditioned medium or purification fractions which are diluted in complete MEM medium (see purification).
- histocountability antigens on the cell surface was determined by the indirect immunofluorescence technique.
- the cells are washed 3 times in Hanks medium, then resuspended at the cell density of 5.10 cells / ml. 200 ⁇ l of this suspension are distributed in wells of a round bottom microplate (96 wells). The plate is centrifuged for 5 minutes at 800 g, the supernatant is removed.
- the cells are then incubated for 30 minutes at 4 ° C. in a humid chamber with 20 ⁇ l of antibody at 10 ⁇ g / ml: Dl-12 (Carrel and Coll, 1981), for the HLA class II and 10T2 antigens (Immunotech, France ) for HLA class I antigens
- the cells After three washes in Hanks medium by centrifugation for 5 minutes at 800 g and removal of the supernatant, the cells are incubated for 30 minutes at 4 ° C. in a humid chamber with 20 ⁇ l of goat anti mouse immunoglobulin antibodies coupled to fluorescein (FITC). (Immunotech, France) at the dilution prescribed by the manufacturer. The cells are washed 3 times in Hanks medium and analyzed by flow measurement (ATC Qdam
- the analysis is performed on 5,000 or 10,000 cells at a wavelength of 488nm.
- the results are represented in the form of cell distribution histograms with, on the abscissa, the fluorescence intensity (logarithmic scale) and, on the ordinate, the number of cells. 5
- the K562 cells are washed 3 times in RPMI-1640 (without phenol red) in order to remove the traces of SVF, then resuspended in RPMI-1 40 (without phenol red) added with 2 mM of glutamine.
- a dialysis bag with a porosity of 50Kd (Spec ⁇ rapor 7 Spectrum) containing 10 ml of pure fetal calf serum is introduced into a culture flask containing 5 ml containing 90 ml of RPMI-1640 (without phenol red or SVF) and
- the cells are cultured for 72 hours at 37 ° C., the medium is centrifuged at 800 g for 15 minutes; the pellet is removed and the supernatant is again centrifuged at 800 g for 15 minutes, then filtered through a 0.22 ⁇ m filter. PMSF J is added to the supernatant at a final concentration of ImM.
- the supernatant is concentrated 100 times on an AMICON YM10 membrane, then dialyzed against a large volume of IOmM Phosphate buffer / pH 7.4 containing PMSF ImM.
- An anion exchange column (Mono Q Pharmacia SUEDE) is balanced with 10 ml of 10 mM Phosphate buffer / pH 7.4.
- the sample is deposited on the column and then eluted using 20 ml of a NaCl gradient from 0 to 0.25 M in 10 mM buffer / pH 7.4.
- 0.5 ml fractions are collected at the column outlet and analyzed on polyacrylamide gel (gradient from 8 to 25%) in the presence of SD5.
- the gel is then stained with silver nitrate as prescribed by the manufacturer (Phast System, Pharmacia SUEDE).
- the biological activity of each fraction is then tested, at several dilutions in complete R PMI-1640 medium, according to the protocol described above.
- fractions containing the biological activity are combined and concentrated 10 times on an AMICON YM 10 membrane, the sample is placed on a gel filtration column (Superose 12, Pharmacia SUEDE), then the filtration is carried out using with a 10 mM phosphate buffer / 0.15 M NaCl / pH 7.4.
- the column had previously been calibrated with a set of proteins of known molecular weights (Kit Pharmacia) and equilibrated with 10 mM phosphate buffer / 0.15 M NaCl / pH 7.4.
- a Balb / C mouse is immunized according to the following protocol:
- a final subcutaneous injection is carried out 5 days before cell fusion with a solution containing 10 ⁇ g of purified protein 0 in 0.5 ml of PBS without Freund's adjuvant.
- the NSI mouse myeloma cells are resuspended in complete RPM1-1640 medium, at a concentration of 250,000 cells / ml.
- the peritoneal macrophages of a Balb / C mouse are removed by washing the peritoneal cavity using 5 ml of cold 0.15 M NaCl.
- the macrophages are centrifuged for 10 minutes at 800 g, then resuspended in HAT medium at a concentration of 5.10 cells / ml and distributed in 5 culture microplates (96 wells), at the rate of 100 ⁇ l per well.
- the micropiacs are then placed in a C02 incubator (37 ° C, 7% C0 2)
- the NSI cells are washed 4 times in RPMI-1640 by centrifugation at 800 g for 10 minutes, then the last pellet is taken up in RPMI-1640 at the concentration of 10 cells / ml.
- the spleen of the immunized mouse is removed, diacerated in RPMI-1640, the cells obtained are centrifuged for 10 minutes at 800 g and 7 the pellet taken up in RPMI-1640 at the concentration of 10 cells / ml.
- cell fusion is carried out by mixing, in a 50 ml tube, 5 ml of spleen cells (5.10 cells), 3 ml of NSI cells (3.10 cells) and 42 ml of RPMI-1640.
- the tube is centrifuged for 10 minutes at 800 g, and the pellet is taken up in 1 ml of fusion solution, added in 1 minute, maintaining constant agitation. Then the tube is immersed, 90 seconds, in a water bath at 37 ° C while maintaining agitation.
- the fusion is stopped by introducing 50 ml of complete RPMI-1640 medium according to the following protocol:
- the tube is left for 5 minutes at room temperature, centrifuged for 10 minutes at 200 g and the pellet obtained is washed twice in complete RPMI-1640 medium, per centnf ugation 10 minutes at 200 g. After each centrifugation the cells are taken up as gently as possible. The cells are resuspended in 50 ml of HAT medium and distributed, at a rate of 100 ⁇ l / well, in the microplates containing the macrophages. These are replaced in the CO ⁇ incubator
- the medium is renewed after 6 days of culture, by aspirating the supernatant and replacing it with fresh medium. During the second and third weeks of culture, colonies, made up of hybrid cells selected by the medium, appear in certain wells.
- the culture supernatants are removed to test the presence of antibodies and the reactivity thereof; the clones of interest are removed and transferred to 24-well culture macroplates containing 2 ml of complete RPMI-1640 medium and 2.10 splenic cells originating from a normal Balb / C mouse.
- the purified protein is fixed on microELlSA microplates, by incubation for 1 hour at 37 ° C., with 100 ⁇ l per well, of a protein solution at 0.1 ⁇ g / ml in a carbonate / bicar buffer. 0.5 M bonate pH 9.6. The excess protein is removed by 5 washes in NaCl / Tween buffer. Then the plate is saturated for 1 hour at 37 ° C. using a solution of PBS / SAB (Bovine Albumin Serum) 3%.
- PBS / SAB Bovine Albumin Serum
- the revelation of the mouse immunoglobulins fixed to the plate is carried out by incubation with 100 ⁇ l / well of goat anti mouse immunoglobulin antibodies labeled with peroxidase and diluted (at the dilution prescribed by the manufacturer) in PBS / 0.05% Tween 20/3% SAB. The plates are incubated for 30 minutes at 37 ° C. and then washed 5 times in NaCl / Tween buffer.
- the level of peroxidase-labeled antibodies attached to the plate is evaluated by determining the peroxidase activity using a solution of orthophenylene Diamine (OPD) in an OPD buffer in the presence of hydrogen peroxide (HO ( 40 mg of OPD per 100 ml of Buffer and 20 ⁇ i of H ⁇ O-, 110 volumes are added extemporaneously).
- OPD orthophenylene Diamine
- ICIG-7 cells are cultured in 6-well culture macroplates (9 cmV well) at a cell density of 5.10 cells / well / 2 ml, for 72 h in the presence of 1000 IU / ml of recombinant IFN-gamma (CHO) , purified protein and hybridoma supernatants diluted 1/2, in complete MEM medium, containing the antibodies.
- CHO recombinant IFN-gamma
- the nitrocellulose is cut into strips to test the reactivity of the various monoclonal antibodies vis-à-vis the molecule.
- Each strip is incubated overnight at 4 ° C. with 2 ml of each hybridoma culture supernatant diluted 1/2 in a PBS / 0.1% Tween 20 solution. After 3 washes of 5 minutes in NaCl / buffer Tween, the bands are incubated for 1 h 30 min at room temperature with rabbit anti-mouse immunoglobulin antibodies (Rabbit anti Mouse DAKO 24 1 2) diluted to 1/500 in NaCl / Tween buffer.
- the strips are incubated with the APAAP complex (Sera Lab) diluted 1/400 in NaCl / Tween buffer, 1 h 30 min at room temperature. The strips are again washed 4 times in NaCl / Tween buffer.
- the fixed antibodies are revealed according to the following protocol: 400 ⁇ l of NBT (50 mg / ml) are added to 60 ml of NBT buffer, after dissolution, 200 ⁇ l of BCIP (50 mg / ml) are added to the solution. The strips are left in this solution for approximately 5 minutes: then washed with water and dried on a hatman paper 3MM Chr.
- An isolated colony is removed and incubated at 37 ° C. with shaking for 3 to 4 hours in 1 ml of LB, then the bacteria are transferred into 50 ml of LB and incubated overnight at 37 ° C with shaking. The bacteria are centrifuged for 20 minutes at 1200 g and the pellet is taken up in 20 ml of SM buffer.
- 300 ⁇ l of bacteria Y 1090 are added to 100 ⁇ l of phages diluted to 1/500000, in SM buffer: the phage bacteria mixture is incubated for 25 minutes at 37 ° C. 7.5 ml of soft agar (Top Agar) are added and immediately spread on a 150 mm dish containing LB / agar / ampicillin. The dish is incubated at 42 ° C for 4 h, then the lysis ranges are counted to determine the titer of the bank.
- the filters are transferred into a mixture of 4 antibodies, chosen from those produced, in the form of ascites and diluted 1/500 in NaCl / Tween buffer.
- the filters are incubated overnight at 4 ° C., washed 4 times 5 minutes in NaCl / Tween buffer, then incubated for 1 h 30 min at laboratory temperature, with diluted rabbit anti Mouse immunoglobulin antibodies (Rabbit anti Mouse DAKO Z 12). 1/500 in NaCI / Tween buffer. After 4 washes of 5 minutes in NaCI / Tween buffer, the filters incubated with the ⁇ P P Complex (Sera Lab) diluted 1/400 in NaCI / Tween buffer, 1 h 30 at room temperature.
- the filters are again washed 4 times in NaCl / Tween buffer.
- the positive lysis ranges are revealed according to the following protocol: 400 ⁇ l of NBT (50 mg / ml) are added to 60 ml of NBT buffer, after dissolution, 200 ⁇ l of BC IP (50 mg / ml) are added to the solution.
- the filters are left in this solution in the dark until the appearance of a positive lysis range (approximately 5 minutes); the filters are then washed with water and dried on a whatman 3 MM Chr paper for a few minutes.
- the positive lysis ranges in the first round are taken using an inverted Pasteur pipette, each carrot thus taken is put to diffuse overnight in 1 ml of SM / MgSO buffer. 10 m ⁇ 1.
- the phages are titled horn described for the titration of the bank.
- the positive lysis ranges in the second round are taken using a Pasteur pipette, each carrot thus taken is put to diffuse overnight in 1 ml of SM / MgSO buffer. 10 mM
- the phages are titrated as described for the titration of the bank. For each lysis range, a suspension of 50 phages in 100 ⁇ l of SM / MgSO buffer, l ⁇ mM is added to 100 ⁇ l of bacteria Y 1090 freshly prepared in SM.
- a suspension of 5.10 phages to be amplified in 100 ⁇ l of SM / MgSO ⁇ 10 m.M buffer is added to 300 ⁇ l of bacteria Y 1090 freshly prepared in SM, the mixture is incubated for 25 minutes at 37 ° C. 7.5 ml of Top Agar are added to each tube and immediately spread on a 150 mm box containing LB / Agar / Ampicillin. The dishes are incubated at 42 ° C for 4 h, then overnight at 4 ° C in 10 ml of SM. The diffusion product is recovered, and the box rinsed with 5 ml of SM buffer. The phages are titrated as described for the titration of the bank.
- An isolated colony of bacteria Y1090 is removed and incubated at 37 ° C. with shaking for 3 to 4 hours in 1 ml of LB, then transferred to 50 ml of
- the mixture is incubated for 20 minutes at 37 ° C. with shaking. After a 30-minute centnfugation at 10,000 RPM at 4 ° C., the supernatant is recovered, DNAse and RNAse at the final concentration of 2.5 ⁇ g / ml are added.
- the preparation is incubated for 45 minutes at 37 ° C. with shaking, 24 g of NaCl (for 400 ml) and ⁇ g of PEG 6000 (for 400 ml) are successively added. After precipitation for 1 hour (or overnight) at 0 ° C, the mixture is centrifuged at 1 000 RP.M 30 minutes at 4 ° C. 5 The supernatant is removed and the tube was drained on absorbent paper. The pellet is taken up in 1 ml of SM buffer, then 10 ⁇ l of 10% SDS and 10 ⁇ l of 0.5 M EDTA pH8 are added. The tube is incubated for 15 minutes at 68 ° C.
- the insert is recovered after digestion with the restriction enzyme J EcoRI:
- RNAse 10 ⁇ g / ml
- the digestion is controlled on 1% agarose gel in TAE IX buffer; for this 8 ⁇ l of the solution are removed and 2 ⁇ l of 0 loading buffer are added.
- the migration takes place at 80 volts in a mini eiectrophoresis tank in the presence of TAE I X buffer and BET at 0.5 ⁇ g / ml.
- the supernatant is carefully removed and the pellet washed in 500 ⁇ l of 80% ethanol and centrifuged for 1 5 minutes at 12000 g at 4 ° C., then dried. The pellet is taken up in 10 ⁇ l of distilled water.
- the plasmid is digested with EcoRI:
- the mixture is incubated for 1 hour at 37 ° C., the digestion is checked on 1% agarose gel as described above.
- 100 ⁇ l of the digestion solution are transferred to an Eppendorf tube and 100 ⁇ l of Phenol / Chloroform V / V are added. After shaking the tube and centrifuging for 5 minutes at 12000 g and at 4 ° C, the upper aqueous phase is transferred to a new tube. 100 ⁇ l of 4 M ammonium acetate and 500 ⁇ l of cold absolute ethanol are added and the tube left for 15 minutes in the carbo ice, reheated for a few seconds and centrifuged for 15 minutes at 12000 g at 4 ° C. The supernatant is carefully removed and the pellet washed in
- a 0.8% SeaPlaque GTG agarose gel (FMC BioProducts) is produced in TAE I X buffer. 2 ⁇ l of loading buffer are added in either 10 ⁇ l of plasmid or 10 ⁇ l of phage DNA. The samples are deposited on the gel and the migration is carried out at 20 volts in a TAE IX buffer in the presence of BET at 0.5 ⁇ g / ml final; until the migration front reaches 10 cm.
- the agarose bands corresponding to the plasmid and to the insert are cut under UV and recovered in Eppendorf tubes, the tubes are heated to 65 ° C. and the volume of molten agarose measured.
- the supernatant is removed and the bacteria resuspended in 50 ml of CaCl-50 mM / 20% glycerol.
- the bacteria are either used immediately, or frozen at -80 ° C, in aliquots.
- the tubes are incubated for 15 minutes at 4 ° C, then 2 minutes at 42 ° C and finally 10 minutes at room temperature.
- 1 ml of LB is added and these are incubated for 1 hour at 37 ° C., 300 ⁇ l of this suspension are spread on a 90 nm dish containing LB / Agar / Ampi ⁇ cillin.
- the dishes are incubated overnight at 37 ° C.
- Colonies are removed from the dishes using toothpicks and placed in tubes containing 3 ml of LB, then incubated overnight at 37 ° C. with shaking. 1.2 ml of each suspension are transferred into Eppendorf tubes, the bacteria are recovered by centrifugation for 15 minutes at 12000g (4 ° C). The supernatant is removed, the pellet taken in 1 00 ⁇ l of TELT buffer and 10 ⁇ l of lysozy me. The tubes are placed for 1 minute at 1,00 ° C. and 5 minutes in ice, then centrifuged for 10 minutes at room temperature. The pellet is removed using a toothpick, then 220 ⁇ l / tube of cold absolute ethanol are added and the tubes put in dry ice for 1 minute.
- the tubes are reheated then centrifuged for 1 5 minutes at 4 ° C. and at 1,200 g, the supernatants eliminated and the pellets washed with 500 ⁇ l / tube of 80% cold ethanol, centrifuged 1 0 m inutes at 1,2000g at 4 ° .
- the pellets are dried and then each pellet is taken up in 30 ⁇ l of 10 mM Tris HC1 pH 7.5.
- One of the plasmids containing the insert is amplified; for this, 50 ⁇ l of bacteria containing the plasmid of interest are incubated overnight at 37 ° C. and with shaking in 10 ml of LB containing Ampicillin.
- the optical density is measured at 600 nm and the bacteria are diluted in LB, containing Ampicillin, to obtain 500 ml of culture having an optical density of 0.1.
- the bacteria are incubated overnight at 37 ° C. and with stirring in a 2 liter Erlen Meyer.
- the bacteria are centrifuged for 20 minutes at 4 ° C. and at 2000 g, and the purification of the plasmid is carried out, according to the manufacturer's instructions, on a Quiagen column.
- oligonucleotides The synthesis of oligonucleotides is carried out using an automatic synthesizer (Applied biosystem), the oligonucleotide obtained is fixed on a column. It is eluted from this column with 3 25% ammonia passages (300 .mu.l, 300 .mu.l and 400 .mu.l) using a syringe "of 1 ml and recovered at the other end with the aid of another syringe Each introduction of ammonia is accompanied by a 15-minute incubation at room temperature The oligonucleotide is recovered in a tube which is placed at 65 ° C. overnight.
- Applied biosystem automatic synthesizer
- the oligonucleotide is precipitated in 1 volume of 4 M ammonium sulphate and two and a half volumes of cold absolute ethanol, the tube is placed in the dry ice for 15 minutes, warmed, centrifuged for 15 minutes at 12000 g at 4 ° C. The supernatant removed and the residue washed in 500 ⁇ l of cold 80% ethanol. The pellet is dried and taken up in 500 ⁇ l of distilled water. A measurement of the optical density is carried out at 260 nm and the concentration of oligonucleotide is adjusted to 0.8 ⁇ M which can be used for the sequence.
- the sequencing was carried out using the T7 sequencing kit from Pharmacia, according to the technique described by the manufacturer.
- the reaction product is electrophoresed on 8% polyacrylamide gel 0.4 mm thick, in the presence of 46% urea and in TBE IX buffer. Two deposits of each sequence reaction are carried out 2 hours apart.
- the sequence was determined by several reactions. The first two sequence reactions were carried out using two oligonucleotides corresponding to the site of insertion of the insert into the plasmid. The two following sequence reactions were carried out using 2 15mer oligonucleotides corresponding to the last bases which can be read on the insert. The following sequence reactions were carried out in the same way, that is to say that 2 new oligonucleotides were chosen and synthesized. Successive reactions were carried out until the complete sequence was obtained. 4. Amplification of the phage insert by PCR
- Amplification of the insert by PCR was carried out on a Perkin Elmer Cetus device.
- the PCR product is used for sequencing according to the Maxam and Gilbert technique on pieces of paper (for Maxam and Gilbert Amersham RPN 1500 sequence).
- Reaction A + G the paper is incubated for 10 minutes at room temperature in 1 ml of 66% aqueous formic acid.
- Reaction C the paper is incubated for 10 minutes at room temperature in 1 ml of hydroxylamine / hydrochloride 275 mg / ml pH 6.
- Reaction G the paper is incubated for 5 minutes at room temperature in 1 ml of 50 mM ammonium formate pH 3.5 containing 7 ⁇ l of DMS.
- T + C reaction the paper is incubated twice 10 minutes at room temperature in twice l ml of potassium permanganate 2 mg / ml.
- Each fragment is washed 3 times 30 seconds in distilled water and once 30 seconds in 96% ethanol, the paper is air dried 2 minutes between each wash.
- the fragments are then transferred to Eppendorf tubes containing 300 ⁇ l of piperidine; after 30 minutes at 90 ° C the fragments are removed and the tubes allowed to dry.
- pellets are taken up in 40 ⁇ l of distilled water per tube and then dried. This operation is repeated 3 times. Each base is included in
- the insert purified from the phage is treated with the enzyme of
- DNA is precipitated by adding one volume of 4 M ammonium acetate and 2.5 volumes of cold absolute ethanol; the tube is placed for 15 minutes in the dry ice, heated, centrifuged at 12000g 15 minutes at 4 ° C. After removal of the supernatant, the pellet is washed in 500 ⁇ l of cold 80% ethanol, centrifuged for 15 m inutes at 12,000 g at 4 ° C., dried and taken up in 10 ⁇ l of distilled water.
- the tube is incubated at 15 ° C. overnight, the non-removed adapters are eliminated on a column of sephadex S400 from Pharmacia according to the protocol described by the manufacturer.
- the recovered DNA is precipitated as described above and the pellet is taken up in 21 ⁇ l of distilled water.
- CDM8 vector cut with BstXl In vitrogen 0.2 ⁇ g / ⁇ l
- 3 ⁇ l of ligation buffer supplied by the manufacturer
- 2 ⁇ l of T4 DNA ligase 2.5 IU / ⁇ l
- the tube can be stored at -20 ° C.
- An isolated colony of bacteria is removed and cultured in 50 ml of LB with stirring at 37 ° C overnight.
- the density is measured at 600 nm diluted in LB to obtain 500 ml of bacteria at o, l optical density.
- the bacteria are returned to culture at 37 ° C. with stirring until an optical density of 0.4 to 0.5 at 600 nm is obtained; the bacteria are cooled as quickly as possible to 0 ° C. and left for 15 minutes at 0 ° C.
- 2 ⁇ l of the ligation product and 50 ⁇ l of competent bacteria are mixed in a 0.2 cm electroporation cuvette, the device is adjusted to 2470 mV, 400 Ohms, 25 ⁇ F.
- the bacteria are taken up in l ml of SOC medium and then incubated for 1 h with shaking at 37 ° C.
- the bacteria are spread at a rate of 10 ⁇ l, 100 ⁇ l or 500 ⁇ l on 3 boxes of LB / Agar / Ampicillin / Tetracycline.
- the dishes are incubated overnight at 37 ° C. Mini preparations are made to check the insertion as described above.
- One of the plasmids having the direction of insertion allowing the synthesis of the protein, is used for the electrophoresis of COS cells.
- the COS cells are seeded in complete DMEM medium and are collected after 24 hours (50 to 70% confluence). The cells are washed twice in cold PBS by centrifugation at 800 g for 5 minutes and resuspended at 10 cells / ml in electroporation buffer.
- 0.8 ml of cell suspension and 60 ⁇ g of plasmid / insert are mixed in a 0.4 cm electroporation cuvette.
- the cuvette is placed in the ice for 10 minutes, the device is set to 380 mV, 25 ⁇ F.
- the cuvette is placed in ice for 10 minutes, then the cells returned to culture in a 75 cm 2 flask. The supernatant is removed 48 hours later for testing.
- the supernatant of COS cells, electroporated, is used in an induction test for ICIG7 cells, the supernatant is used at different dilutions in complete MEM medium, and the test is carried out as described above.
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Abstract
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Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US08/244,557 US5612195A (en) | 1991-12-02 | 1992-02-12 | Recombinant production of a human interferon (IFN)-gamma antagonist cytokine |
| JP5509893A JPH07501695A (ja) | 1991-12-02 | 1992-12-02 | Ifn‐ガンマ‐アンタゴニストサイトカイン |
| EP93901040A EP0618967A1 (fr) | 1991-12-02 | 1992-12-02 | Cytokine antagoniste de l'ifn-gamma |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR91/14908 | 1991-12-02 | ||
| FR9114908A FR2684383B1 (fr) | 1991-12-02 | 1991-12-02 | Cytokine agoniste de l'ifn-gamma. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1993011232A1 true WO1993011232A1 (fr) | 1993-06-10 |
Family
ID=9419576
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/FR1992/001123 Ceased WO1993011232A1 (fr) | 1991-12-02 | 1992-12-02 | Cytokine antagoniste de l'ifn-gamma |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US5612195A (fr) |
| EP (1) | EP0618967A1 (fr) |
| JP (1) | JPH07501695A (fr) |
| CA (1) | CA2124948A1 (fr) |
| FR (1) | FR2684383B1 (fr) |
| WO (1) | WO1993011232A1 (fr) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8513208B2 (en) | 2008-02-28 | 2013-08-20 | Argos Therapeutics, Inc. | Transient expression of immunomodulatory polypeptides for the prevention and treatment of autoimmune disease, allergy and transplant rejection |
| US20130142809A1 (en) | 2011-11-23 | 2013-06-06 | Andrew A. Welcher | METHODS OF TREATMENT USING AN IFN gamma INHIBITOR |
| KR102181548B1 (ko) * | 2019-02-20 | 2020-11-20 | 한국외국어대학교 연구산학협력단 | 염증성 질환 또는 자가면역성 질환의 예방 또는 치료 활성을 갖는 펩타이드 및 이의 용도 |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1991005799A1 (fr) * | 1989-10-23 | 1991-05-02 | Schering Corporation | Polypeptides inhibiteurs d'interferon gamma |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0527283B1 (fr) * | 1991-08-12 | 1997-11-26 | Societe Des Produits Nestle S.A. | Composition alimentaire |
-
1991
- 1991-12-02 FR FR9114908A patent/FR2684383B1/fr not_active Expired - Fee Related
-
1992
- 1992-02-12 US US08/244,557 patent/US5612195A/en not_active Expired - Fee Related
- 1992-12-02 WO PCT/FR1992/001123 patent/WO1993011232A1/fr not_active Ceased
- 1992-12-02 CA CA002124948A patent/CA2124948A1/fr not_active Abandoned
- 1992-12-02 EP EP93901040A patent/EP0618967A1/fr not_active Ceased
- 1992-12-02 JP JP5509893A patent/JPH07501695A/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1991005799A1 (fr) * | 1989-10-23 | 1991-05-02 | Schering Corporation | Polypeptides inhibiteurs d'interferon gamma |
Non-Patent Citations (3)
| Title |
|---|
| BIOLOGICAL ABSTRACTS ,vol. 88, no. 1, 1989. abstract no. 6547,KRIEF P. et al . of tumorigenic potential in the human myoepi thelial HBL100 cell line is associated with decreased expression of HLA class I,class II and integrin beta3 and increased expression of c-myc. * |
| EUROPEAN JOURNAL OF IMMUNOLOGY vol. 17, no. 7, 1987, WEINHEIM; DE. pages 1021 - 1025 P. KRIEF ET AL 'Modulation of expression of class II histocompatibility antigens by secretion of a cellular inhibitor in K562 leukemic cells' * |
| PROCEEDINGS OF THE AMERICAN ASSOCIATION FOR CANCER RESEARCH ANNNUAL MEETING vol. 29, Mars 1988, NEW ORLEANS,LOUISIANA;US. page 80 P. KRIEF ET AL 'Induction of HLA class II antigens by IFN-gamma on K562 cells depends on the production of a specific inhibitor and on the acquisition of a differentiated phenotype' * |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2684383A1 (fr) | 1993-06-04 |
| CA2124948A1 (fr) | 1993-06-10 |
| FR2684383B1 (fr) | 1994-03-11 |
| US5612195A (en) | 1997-03-18 |
| JPH07501695A (ja) | 1995-02-23 |
| EP0618967A1 (fr) | 1994-10-12 |
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