WO1994012648A2 - Production de sous-unites de recepteurs t solubles par co-transfection, utilisations des produits ainsi obtenus - Google Patents
Production de sous-unites de recepteurs t solubles par co-transfection, utilisations des produits ainsi obtenus Download PDFInfo
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- WO1994012648A2 WO1994012648A2 PCT/FR1993/001165 FR9301165W WO9412648A2 WO 1994012648 A2 WO1994012648 A2 WO 1994012648A2 FR 9301165 W FR9301165 W FR 9301165W WO 9412648 A2 WO9412648 A2 WO 9412648A2
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- receptor
- soluble
- receptors
- subunits
- dna sequences
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Classifications
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- C—CHEMISTRY; METALLURGY
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- C07K14/435—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans
- C07K14/705—Receptors; Cell surface antigens; Cell surface determinants
- C07K14/70503—Immunoglobulin superfamily
- C07K14/7051—T-cell receptor (TcR)-CD3 complex
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P37/00—Drugs for immunological or allergic disorders
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K38/00—Medicinal preparations containing peptides
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K2319/00—Fusion polypeptide
- C07K2319/32—Fusion polypeptide fusions with soluble part of a cell surface receptor, "decoy receptors"
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K2319/00—Fusion polypeptide
- C07K2319/70—Fusion polypeptide containing domain for protein-protein interaction
- C07K2319/74—Fusion polypeptide containing domain for protein-protein interaction containing a fusion for binding to a cell surface receptor
- C07K2319/75—Fusion polypeptide containing domain for protein-protein interaction containing a fusion for binding to a cell surface receptor containing a fusion for activation of a cell surface receptor, e.g. thrombopoeitin, NPY and other peptide hormones
Definitions
- the present invention relates to soluble T receptors and more particularly to secreted forms of soluble T receptors (RTs)
- T lymphocytes are able to recognize in a highly specific way myriads of antigens (Ag), by means of extremely diversified surface structures belonging to the immunoglobulin (Ig) superfamily, T receptors (RT ).
- Ag antigens
- Ig immunoglobulin
- RT T receptors
- variable glycoprotein subunits In humans as in mice, most T lymphocytes in adults express RTs made up of 2 variable glycoprotein subunits called ⁇ and ⁇ . Like the heavy and light chains of Ig, these subunits comprise a variable domain (V) aminoterminal and a constant domain (C) carboxyterminal and are furthermore very generally associated with each other covalently, via an interchain disulfide bridge.
- V variable domain
- C constant domain
- the nature of the antigens recognized by the ⁇ receptor is relatively well established: they are complexes formed by an oligopeptide antigen (resulting from the intracellular degradation of endogenous or exogenous proteins) closely associated with the products of polymorphic genes located in the major complex histocompatibility (CMH), known as class I or II.
- CMH major complex histocompatibility
- the interaction between the ⁇ receptor and the MHC / Ag complexes is conventionally reinforced by so-called core or accessory molecules (CD4 and CD8), recognizing conserved portions of the MHC class II
- T lymphocytes More recently, another subpopulation of T lymphocytes has been described which is distinguished by the nature of the genes (7 and ⁇ > encoding these T receptors. Unlike the ⁇ T lymphocytes, the antigenic * specificity of the T y ⁇ cells is still unclear. Based on a relative homology of the primary sequences of the ⁇ and ⁇ chains of the T receptor, some predicted structural similarity of the ligands for these receptors. In agreement with this hypothesis, a fraction of ⁇ T lymphocytes has been found to be directed against molecules structurally close to or identical to MHC products conventionally recognized by ⁇ T lymphocytes. However, there are also several examples of recognition by this T subpopulation of molecules of more distant structure, such as stress proteins or certain activation molecules such as CD48.
- the present inventors sought to generate “soluole” (secreted) forms of the ⁇ T receptor, which could be used (like Ig) as probes allowing the isolation, localization and possibly the purification of specific ligands. . Furthermore, such soluble T receptors also have a number of clinical applications. Traunecker et al. (1989. Immunol. Today 10:29) reported attempts to produce soluble T receptors which consisted in eliminating the transmembrane (TM) portion of the ⁇ chains or ⁇ chains by introducing a translation termination codon upstream of the sequences coding for the TM region which proved to be unsuccessful, no secretion being able to be detected. Following these initial failures, other strategies were then adopted.
- TM transmembrane
- chimeric proteins comprising the V, or V and C regions of the ⁇ and ⁇ subunits, attached to the C 'immunoglobulin regions or to glycosyl phosphatidylinositol anchors. (GPI).
- RT / Ig fusion proteins the main problem turned out to be the sometimes majority secretion of monomeric or homodimeric forms.
- heterodimeric forms RTs ⁇ sometimes presented significant structural differences with the membrane forms; in particular the 2 chains ⁇ and ⁇ were very generally associated in a non-covalent manner. This could therefore have repercussions on the overall structure and the fine antigenic specificity of such chimeric molecules.
- the present inventors have discovered that soluble T receptors can be obtained easily and in high yield regardless of the combination of chains implemented, using a method consisting in producing DNA molecules coding for each of the constituent T-subunits deleted from the branch branch portion, and in co-transferring these DNAs in a host cell.
- the present invention also relates to a method for producing soluble T receptors, charac ⁇ terized in that a co-transfection is carried out in a host cell of the DNA sequences coding for each of the constituent subunits of the T receptor. deleted from the transmembrane portion of the T receptor.
- soluble V ⁇ C ⁇ / V ⁇ C ⁇ T receptors are produced by co-transfection into a host cell of the DNA sequences coding for the ⁇ and ⁇ subunits of the T ⁇ receptor deleted from the transmembrane portion of the T ⁇ receptor.
- V ⁇ C ⁇ / V ⁇ C ⁇ soluble T receptors are also produced by co-transfection into a host cell of the DNA sequences coding for the ⁇ and ⁇ subunits of the T ⁇ receptor deleted from the transmembrane portion of the T ⁇ receptor.
- soluble heterodimeric T receptors V ⁇ C ⁇ / V ⁇ C ⁇ and V ⁇ C ⁇ / V ⁇ C ⁇ are produced, in which the constituent subunits are associated by a covalent bond, by co-transfection into a host cell of the DNA sequences encoding for the C ⁇ and C ⁇ domains of the ⁇ and ⁇ subunits of the T ⁇ receptor deleted from their transmembrane portion, fused respectively with the DNA sequences coding for the Va and V ⁇ domains of the a and ⁇ subunits of the Ta ⁇ receptor for obtaining VaC ⁇ / V ⁇ C ⁇ receptors, or fused respectively with the DNA sequences coding for the V ⁇ and Va domains of the ⁇ and a subunits of the Ta ⁇ receptor to obtain VaC ⁇ / V ⁇ C ⁇ receptors.
- T receptors soluble V ⁇ C ⁇ / V ⁇ C ⁇ hybrids by co-transfection into a host cell of DNA sequences coding for the ⁇ subunit of the T ⁇ receptor deleted from its transmem ⁇ bran portion, with the DNA sequences coding for the C ⁇ domain of the ⁇ subunit fused with DNA sequences encoding the Va domain of the ⁇ subunit of the T ⁇ 6 receptor.
- This construction is particularly advantageous and is based on the fact that certain Va genes can be used either by ⁇ clones, or by ⁇ clones.
- the DNA sequences of the V ⁇ 2 and V ⁇ 9 genes are used for the constructions of the soluble T receptors of the invention for the variable parts. It may however be advantageous to produce V ⁇ C ⁇ / V ⁇ C ⁇ receptors by using a V ⁇ 9 DNA sequence on the one hand, and by replacing the V ⁇ 2 DNA sequence with other V ⁇ DNA sequences for the same reasons as those mentioned. above for the construction of the hybrid V ⁇ C ⁇ / V ⁇ C ⁇ receptor. This construction makes it possible to obtain anti- ⁇ antibodies, or directed against V ⁇ distinct from V ⁇ 2.
- the invention also encompasses these embodiments of soluble V ⁇ C ⁇ / V ⁇ C ⁇ T receptors.
- V ⁇ in particular V ⁇ l
- V ⁇ can be considered as Va, in the sense that they can be indifferently used by chains ⁇ or ⁇ of the receptor T.
- the examples of receptors produced under soluble form provided here demonstrate in particular the advantage of the process in the context of the generation of antibodies monoclonals directed not only against the regions, variables ⁇ and ⁇ , but also ⁇ .
- the deletion of the transmembrane portion of the constituent subunits of the T receptor is carried out by introducing a translation termination codon upstream of the sequences coding for the transmembrane portion of these subunits, in particular by mutagenesis directed by P.C.R. (Polymerase Chain Reaction).
- DNA sequences are genomic DNA or cDNA sequences.
- the co-transfection is carried out in eukaryotic cells, in particular hamster ovary (CHO) cells.
- a subject of the invention is also a fusion protein formed between a soluble T receptor and a peptide sequence, the peptide sequence constituting a peptide or a protein, the fusion protein being obtained by fusion of the sequence DNA coding for the peptide or protein with one or both chains of DNA coding for the T receptor subunits deleted from their transmembrane portion, followed by co-transfection of the sequences d DNA thus fused into a host cell.
- the peptide sequence is that of interleukin-2 (IL-2).
- the subject of the invention is also polyclonal or monoclonal antibodies, human or animal, directed against a soluble T receptor obtained by the method of the invention or an RTs-IL2 fusion protein as defined above.
- the monoclonal antibodies according to the invention can be prepared according to a conventional technique.
- the soluble T receptors possibly fused with interleukin-2 or another protein, can be coupled if necessary with an immunogenic agent,. such as tetanus toxoid, by a coupling agent such as a diazotized benzidine.
- the present invention also encompasses the fragments and derivatives of monoclonal antibodies according to the invention.
- These fragments are in particular the F (ab ') 2 fragments which can be obtained by enzymatic cleavage of the antibody molecules with pepsin, the Fab' fragments which can be obtained by reduction of the disulfide bridges of the F (ab ') 2 fragments and the Fab fragments which can be obtained by enzymatic cleavage of the antibody molecules with papain in the presence of a reducing agent.
- These fragments, as well as Fc fragments can also be obtained by genetic engineering.
- the derivatives of monoclonal antibodies are for example antibodies or fragments of these antibodies to which markers such as a radioisotope are linked.
- Monoclonal antibody derivatives are also antibodies or fragments of these antibodies to which therapeutically active molecules are linked.
- the subject of the invention is also hybridomas producing monoclonal antibodies specific for the peptide sequence described above.
- hybridomas can be obtained by conventional techniques of cell fusion between spleen cells activated in vitro by the antigen or originating from an animal immunized against the peptide sequence of the invention, and cells of a myeloma line.
- a subject of the invention is also a diagnostic composition
- a diagnostic composition comprising a soluble T receptor obtained by a method according to the invention or an RTs-peptide sequence fusion protein, in particular RTs-IL2 as defined above, or also a monoclonal antibody according to 'invention.
- the diagnostic composition according to the invention tion can be used for typing cellular specificities linked to the T receptor.
- a soluble T receptor can be used as such.
- due to the probably low affinity of the latter for its specific ligand it is advantageous to couple the soluble T receptors to a support, in order to increase their avidity by increasing their valence.
- the support may consist of any support traditionally used, such as organic or magnetic beads.
- Such supports are for example plastic plates used for ELISA tests on which the soluble T receptor is fixed in the same way as immunoglobulins, tosyl-activated magnetic beads, for example those sold by Dynal, Oslo, Norway, or activated gels of the AFFIGEL type such as those marketed by BIORAD.
- the coupling techniques are those conventionally used and indicated by the distributor for commercially available supports.
- These methods may consist of chemical coupling or by means of monoclonal antibodies directed against the soluble T receptors in question, the latter being themselves coupled to the support by chemical coupling.
- the diagnostic compositions comprise a fused protein as described above, consisting of a soluble T receptor and an antigenic determinant against which there are specific antibodies.
- Such diagnostic compositions can be used for typing cell specificities not detected by conventional serological techniques.
- the diagnostic composition according to the invention tion can also include monoclonal antibodies as defined above, and preferably a panel of monoclonal antibodies directed against the V and C portions of the T receptor chains obtained by immunization of animals against the soluble T receptors obtained according to the invention, previously purified.
- RTs-IL2 fusion proteins as defined above.
- Such a diagnostic composition can be used in particular for the detection of mono or oligoclonal proliferations, such as those encountered in T leukemias for example.
- the diagnostic composition is brought into contact with a biological sample, for example a blood sample containing pathological T lymphocytes, and the complex formed with the specific ligand for the T receptor and the T receptor is highlighted.
- soluble or the fusion protein comprising the soluble T receptor and an antigenic determinant or the complex formed by the monoclonal antibodies according to the invention and the soluble T receptor or the soluble T receptor-IL2 fusion protein against which they are specifically directed.
- soluble or the fusion protein comprising the soluble T receptor and an antigenic determinant or the complex formed by the monoclonal antibodies according to the invention and the soluble T receptor or the soluble T receptor-IL2 fusion protein against which they are specifically directed.
- These methods can be based on a radioimmunological method of RIA, RIPA or IRMA type, or an immunoenzymatic method of WESTERN-BLOT type on strips or of ELISA type.
- cold molecules are used which are not marked or marked with the aid of a suitable marker which may be biotin or its derivatives, an enzyme such as peroxidization, a fluorescent marker such as fluorescein, a radioactive marker, etc.
- a suitable marker which may be biotin or its derivatives, an enzyme such as peroxidization, a fluorescent marker such as fluorescein, a radioactive marker, etc.
- These in vitro diagnostic procedures include The following steps are taken, for example: depositing a determined quantity of a composition containing a soluble T receptor, a soluble receptor fused with an antigenic determinant or a monoclonal antibody according to the invention directed against the soluble T receptor or the protein of soluble T-Interleukin 2 receptor fusion according to the invention, in the wells of a microtitation plate or on another support such as beads or a nitrocellulose membrane, deposit in the wells of the biological sample to be tested, or incubation of the latter with the beads or the membrane, in the presence of saturating agents or after prior saturation of the activated supports, - after incubation and rinsing of the microplates or bilies, deposit in the wells or incubation with the beads a system for revealing the soluble T receptor-ligand complex possibly formed.
- kits for implementing the diagnostic method of the invention include:
- a subject of the invention is also a therapeutic composition characterized in that it comprises a soluble T receptor obtained according to the method of the invention or a fusion protein as defined above, in particular an RTs-IL2 according to the invention. ⁇ tion.
- a therapeutic composition is useful especially in the treatment of pathological processes - in which a pauciclonal proliferation of T lymphocytes is observed, such as leukemias or T lymphomas and certain autoimmune diseases. It is preferably administered by injectable route in an appropriate vehicle.
- this therapeutic composition has a dual purpose. It allows on the one hand the induction of an anti-idiotypic immune response, then leading to the active and selective elimination of the cells carrying these idiotypes, and on the other hand the blocking by competition of the recognition of autologous antigens in the case of autoimmune proliferations.
- the therapeutic composition according to the invention comprises a soluble heterodimeric T receptor as defined above, optionally carried by a fusion protein.
- the therapeutic composition according to the invention can also comprise a monoclonal antibody according to the invention, optionally coupled to a therapeutically active molecule, for example a cytotoxic molecule, or a fragment or derivative of monoclonal antibody as defined above.
- a monoclonal antibody according to the invention optionally coupled to a therapeutically active molecule, for example a cytotoxic molecule, or a fragment or derivative of monoclonal antibody as defined above.
- composition allows the direct elimination of mono- or oligoclonal cells encountered in certain types of T leukemia.
- - Figure 1 represents the assembly products of the ⁇ and ⁇ genes.
- the sequences of the primers 5 'and 3' used to amplify the cDNAs making it possible to obtain the soluble T ⁇ receptors (cDNAs ⁇ s and ⁇ s) are shown above and below the cDNAs ⁇ and ⁇ respectively.
- the positions of the termination codons are shown in bold.
- the 3 • gray parts of the ⁇ and ⁇ cDNAs correspond to the hydrophobic transmembrane (TM) regions.
- FIG. 2 represents the corresponding nucleotide and peptide sequences of the soluble ⁇ and ⁇ chains of the clone used for the construction of the soluble T receptor described above.
- FIG. 3 shows the results of RTs ⁇ detection tests by the IRMA technique in conditioned medium from CHO cells transfected with ⁇ s / ⁇ s.
- SN represents the culture supernatant of CHO cells, transfected with an irrelevant cDNA (C) or with the cDNAs of the soluble ⁇ and ⁇ subunits according to the invention (s ⁇ ).
- the monoclonal antibodies giving a significant radioimmunological signal are represented in bold rectangles.
- FIG. 4 represents the titration in activity of soluble RT expressed in ⁇ g / ml, as attested by the IRMA test (sand ich 7B6 / TiV ⁇ 2), fractions eluted from an affinity column coupled with the anti-V ⁇ antibody 7B6 (marketed by Immunotech), to which approximately 500 ml of culture supernatant of ⁇ sF5-CH0 cells have been applied.
- FIG. 5 represents the analysis by SDS-PAGE of positive fractions for the activity of soluble RT, as attested by the IRMA test (sandwich 7B6 / TiV ⁇ 2), of the fractions eluted from an affinity column coupled with the anti-V ⁇ 9B6 antibody.
- the clone of human lymphocytes ⁇ s G 115 (whose nucleotide and peptide sequences corresponding to the soluble ⁇ and ⁇ chains are represented in FIG. 2, respectively in A and B) expressing T receptors V9JPCl ⁇ / V2D3JlC ⁇ was used for the construction of ⁇ s genes and expression of soluble T receptors.
- T ⁇ receptors for human leukocytes in peripheral blood include similar V (D) J regions so that the structural and functional results obtained with the soluble form of the particular RT used can be easily applied to the RT expressed by a large proportion of ⁇ cells, - monoclonal antibodies specific for the C ⁇ , C ⁇ , V ⁇ 9 and V ⁇ 2 regions are readily available and can be used to monitor the production and purification of soluble RT molecules,
- the ⁇ and ⁇ chains of the T receptors of clone G 115 are covalently linked by a disulfide bridge which strongly stabilizes the molecule after its secretion in the medium ,
- clone G 115 kills the cells of a Burkitt lymphoma (called Dadi) and also recognizes an antigen present in water-soluble extracts of Mycobacterium tuberculosis.
- Dadi Burkitt lymphoma
- Clone G 115 derived from T ⁇ lymphocytes derived from leukocytes from peripheral human blood, was maintained in RPMI 1640 medium containing 8% human serum, 2 mM L-glutamine and 150 BRMP (Biological Response Modifier Program) units of IL2 and stimulated every other week with 0.5 ⁇ g / ml of leucoagglutinin (Pharmacia, France), irradiated peripheral blood leukocytes and B lymphoblasts irradiated and transformed by EBV.
- RPMI 1640 medium containing 8% human serum, 2 mM L-glutamine and 150 BRMP (Biological Response Modifier Program) units of IL2 and stimulated every other week with 0.5 ⁇ g / ml of leucoagglutinin (Pharmacia, France), irradiated peripheral blood leukocytes and B lymphoblasts irradiated and transformed by EBV.
- BRMP Bio Response Modifier Program
- MMTV mouse mammary tumor virus
- a mixture for PCR comprising Tris-HCl 13 mM (pH 8.2), KC1 66 mM, MgCl 2 2 M, 2 U of Taq polymerase (Boehringer) and 50 ⁇ M of primer 5 'phospha ⁇ ted shown in Figure 1 were added to the material obtained by reverse transcription and 30 amplification cycles (94 ° C - 1 min, 45 ° C - 1 min, 72 ° C - 1 min) were carried out.
- Amplified DNA was purified after electrophoresis on low melting point agarose gel and cloned into a Bluescript SK + plasmid (Stratagene, La Jolla, California) digested with Sma I.
- the sequencing was carried out using a double-stranded matrix system according to the protocol supplied by the supplier of the USB sequencing kit.
- the fragments were cloned into an expression vector pKCR6 (Matrisian et al., Proc.Natl.Acad.Sci. USA. 83: 9413) digested with EcoRI.
- the plasmid DNA was then introduced into DUKX-B11 DHFR (dihydro-folate reductase) -negative hamster ovary cells, cultured on RPMI 1640 medium, supplemented with 8% fetal calf serum, of 2 mM L-glutamine, thymidine, adenosine and deoxyadenosine at 10 ⁇ g / ml each, using the calcium phosphate precipitation technique (Wigler et al., 1979 Cell. 16: 777).
- DUKX-B11 DHFR dihydro-folate reductase
- the DHFR-positive cells were selected by culture of the transfected cells for three weeks in RPMI medium, supplemented with fetal calf serum and L-glutamine (2 mM) without nucleosides. The stable transfectants were then cloned by the limiting dilution technique.
- soluble Tyô receptors a) Detection of soluble T receptors The monoclonal antibodies used for the detection of soluble RTs were labeled with 125 I by the Iodogen method (Fraker et al., 1978 Biochem.- Biophys.Res.Commun. 80: 849). The T receptors were detected by an immunoradiometric test (IRMA) sandwiched using pairs of monoclonal antibodies specific for the ⁇ and ⁇ chains.
- IRMA immunoradiometric test
- Immulon-1 microtiter plates (Dynatech, Marnes, France) were coated for 90 min. at 37 ° C with 50 ⁇ l of monoclonal antibody Y102 (or 7B6) at 40 ⁇ g / ml in a saline solution of phos ⁇ phate buffer. After elimination of the antibody, the unbound sites were saturated with a saline solution of phosphate buffer containing 0.5% bovine serum albumin for 1 hour at room temperature. The samples to be analyzed were then added in an amount of 40 ⁇ l at the same time as 10 ⁇ l of labeled TiV ⁇ 2 monoclonal antibody. After 90 min. incubation at 37 ° C, the wells were rinsed four times with 100 ⁇ l of a saline solution of phosphate buffer supplemented with bovine serum albumin.
- the bound radioactivity was measured in a scintillation ⁇ counter.
- the following set of antibodies was used to measure the secretion of soluble RT ⁇ by the IRMA technique: anti-V ⁇ 9 (Y102, B37, 7B6), anti-C ⁇ (B121) and anti-V ⁇ 2 (TiV ⁇ 2) antibodies (Miossec and al., 1989, J. Exp. Med. 171: 1171).
- a monoclonal antibody specific for IL2 was also used as a negative control.
- Soluble RT samples were prepared in gel electrophoresis buffer with or without reducing agent, separated by SDS-PAGE, and transferred to a nitrocellulose membrane according to the supplier's recommendations. After saturation of the unbound sites with a blocking buffer (dehydrated skimmed milk and Tween 20), the fingerprints obtained were incubated in the presence of primary antibody (hybridoma supernatant diluted one third with the blocking buffer) for 2 hours at ambient temperature. After washing, an anti-horseradish Ig-peroxidase conjugate was added, and the incubation continued for another 2 hours. The bound antibodies were revealed by diaminobenzidine (1 mg / ml), H 2 0 2 and CoCl 2 .
- the reaction was estimated to be complete by determining tests for monitoring digested samples by isoelectric focusing in PhastGel IEF 3-9 medium (Pharmacia). After dilution with 0.1 M sodium phosphate buffer, pH 7.3, the sample was concentrated using a centripep column at 30,000 revolutions (Amicon) before proteysis. The ⁇ receptors treated with neuraminidase were digested at 37 ° C for 30 minutes with papain (orthington) at an enzyme / substrate ratio of 1/500 in the presence of 1.5 M 2-mercaptoethanol and 1.25 mM EDTA . The reaction was completed by adding N-ethylmaleimide.
- reaction medium was then applied to a Zorbax CF-250 size exclusion chromatography column (DuPont - New England Nuclear) which made it possible after elution to obtain the T receptor treated with papain and with neuraminidase in the form of 'a single peak at around 65 kDa compared to 75 kDa for the native protein.
- the total yield from 3.3 mg of affinity purified T receptor was 1.1 mg or about 34%.
- the material eluted from the anti-V ⁇ 9 column. consisted essentially of ⁇ heterodimers, insofar as it was precipitated by monoclonal antibodies specific for V ⁇ 2. Furthermore, analysis by SDS-PAGE under reducing and non-reducing conditions showed that these heterodimers were linked by a covalent bond.
- BALB / c mice were immunized with soluble ⁇ T receptors, in accordance with the following protocol: on day 1, 50 ⁇ g of protein in 500 ⁇ l of complete Freund's adjuvant 50% emulsified in 0.9% NaCl were injected subcutaneously in fours different points. On day 25, the same protocol was. repeated in incomplete Freund's adjuvant. A booster was given by 3 intraperitoneal injections on days 50, 51 and 52, using 15 ⁇ g of protein each in 250 ⁇ l of 0.9% NaCl. Splenocytes collected on day 53 were fused with myeloma X63 Ag 8653.
- Resistant hypoxanthine / aminopterin / thymidine colonies were screened by a radioimmunoassay (RIA) using a soluble T receptor labeled with iodine, according to the IODOGEN method.
- RIA radioimmunoassay
- 96-well microtitration plates coated with avidin were incubated with biotinylated goat anti-mouse immunoglobulins (GAMIG, Immunotech) in PBS, BSA, NaN 3 overnight at 4 ° C. , then washed 3 times in Tween PBS.
- 100 ⁇ l (10 5 cpm) of radiolabeled soluble T receptors were incubated for 2 hours at room temperature and washed 3 times in PBS-Tween. The bound radiolabelled soluble T receptors were assayed by ⁇ count.
- the monoclonal antibodies having produced an RIA signal were then tested by immunofluorescence to determine their ability to recognize T receptors linked to the membranes of the G9 clone.
- the fine specificity of these monoclonal antibodies was finally studied by screening for their reactivity with respect to clones and lines of T lymphocytes whose phenotype of the T receptor was known.
- Three monoclonal antibodies (52, 106 and 510) were directed against a determinant which was common to all T ⁇ receptors but not to T ⁇ receptors.
- Two monoclonal antibodies (292 and 360) were specific for T receptors comprising the V ⁇ 9 region and two monoclonal antibodies (1 and 389) for T receptors comprising the ⁇ 2 region. No specific specificity could be attributed to the remaining monoclonal antibodies (49, 60, 103 and 515) which recognized subpopulations of ⁇ lymphocytes but whose reactivity could not be correlated with the presence of a particular V region T receptor (Table I below).
- T ⁇ clones Circulating cytometric analysis of T ⁇ clones using an anti-RTs monoclonal antibody.
- the phenotype of the T lymphocyte clones was determined by labeling with antibodies Ti ⁇ a (anti-V ⁇ 9), TiV ⁇ 2) and A13 (anti-V ⁇ l); NR (not carried out).
- soluble ⁇ receptors were prepared as described below, after modification of the multiple cloning site of the expression vector pKCR6.
- Digestion of the vector pKCR6 thus modified by the enzymes Xho I and Xba I freed these two sites and allowed oriented cloning, the Xho I site being located between 5 'of the coding sequence and the Xba I site in 3'.
- b) Generation of a complementary DNA coding for a soluble V ⁇ 8 chain bl) PCR cloning of a soluble V ⁇ 8 chain The RNA used for this cloning comes from a T ⁇ clone.
- the oligonucleotide primer used for the synthesis of the first strand of complementary DNA is as follows:
- amplification of this cDNA was carried out using the oligonucleotide described previously used as an antisense primer and a sense primer containing a site for the restriction enzyme Xho I upstream of the translation initiation codon.
- the sequence of this oligonucleotide is as follows:
- RNA used for this cloning comes from a T ⁇ clone.
- the nucleotide primer used for the synthesis of the first strand of complementary DNA is as follows:
- amplification of this cDNA was carried out using the oligonucleotide described previously used as an antisense primer and a sense primer containing a site for the restriction enzyme Xho I upstream of the initiation codon of the translation.
- the sequence of this oligonucleotide is as follows:
- the cDNA fragment encoding a soluble V ⁇ 3 chain was extracted from the pBS-SK vector after digestion by restriction enzymes Xho I and Xba I and integrated into the modified expression vector pKCR ⁇ described in a) digested with the same enzymes.
- the vector thus obtained was co-transfected in association with the expression vector containing the cDNA coding for the soluble V ⁇ 9 chain.
- the complementary DNA of a total V ⁇ l C ⁇ chain cloned in the vector pBS-SK was used between the restriction sites Sal I and Bam HI.
- This DNA fragment was purified and integrated into the expression vector pKCR6 containing the soluble V ⁇ 3 chain after it had been digested with the restriction enzymes Xho I and Eco RI. This strategy therefore made it possible to replace the variable part V ⁇ 3 by the variable part V ⁇ l and thus to construct a cDNA coding for a soluble chain V ⁇ l.
- the vector thus obtained was co-transfected in association with the expression vector containing the cDNA coding for the soluble V ⁇ 9 chain.
- the purification described above to isolate the V ⁇ 9V ⁇ 2 receptor consisted of immunopurification with an anti V ⁇ 9 antibody (Y102 or 7B6).
- a Affinity column of the same type but using the anti-body 510 described above and which recognizes a determinant of the constant delta chain was used.
- the advantage of this new purification is the possibility of purifying any soluble receptor of the invention whatever the variable chains ⁇ , ⁇ , and even ⁇ , ⁇ which they contain.
- This method was first tested to purify the soluble receptor containing V ⁇ 9 / V ⁇ 3. 5 mg of antibody 510 have been covalently linked to 1 g of a matrix of sepharose beads 4B activated with cyanogen bromide (PHARMACIA, Upsalla, Sweden) according to the supplier's instructions.
- the culture supernatant of the ⁇ 9 ⁇ 3 transfectant was applied to the affinity column thus formed at a rate of 10 ml / hour at room temperature.
- a PBS phosphate buffer saline solution (0.01 M phosphate, 0.14 M NaCl pH 7.2 same flow rate)
- the bound material was eluted with a 0.05 M citrate solution at pH 3.0.
- the eluted fractions were immediately neutralized with a 0.2 M Tris buffer pH 9 (100 ⁇ l for 1 ml of eluate).
- the positive fractions for the soluble RT activity as attested by the IRMA test were pooled, and concentrated with l ⁇ g / ml of proteins on CENTRICON cell (30KD barrier) (AMICON, Beverly, MA, USA) according to the manufacturer's instructions. . This cell also made it possible to change the buffer for PBS.
- the material eluted from the affinity column consists essentially of ⁇ heterodimers, covalently linked, probably present in the form of several glycosylation isomers.
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Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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EP94900880A EP0624201A1 (fr) | 1992-11-25 | 1993-11-25 | Production de sous-unites de recepteurs t solubles par co-transfection, utilisations des produits ainsi obtenus |
JP6512850A JPH07506495A (ja) | 1992-11-25 | 1993-11-25 | 可溶性t受容体のサブユニットの共トランスフェクションによる産生,得られた生成物の用途 |
AU55668/94A AU5566894A (en) | 1992-11-25 | 1993-11-25 | Method for producing soluble t-receptors by co-transfection, and use of resulting products |
US08/256,964 US5723309A (en) | 1992-11-25 | 1993-11-25 | Production of subunits of soluble T cell receptors by co-transfection |
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FR9214203A FR2698880B1 (fr) | 1992-11-25 | 1992-11-25 | Procédé de production de récepteurs T solubles, produits ainsi obtenus et leur utilisation dans des compositions diagnostiques ou thérapeutiques. |
FR92/14203 | 1992-11-25 |
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US (1) | US5723309A (fr) |
EP (1) | EP0624201A1 (fr) |
JP (1) | JPH07506495A (fr) |
AU (1) | AU5566894A (fr) |
CA (1) | CA2128705A1 (fr) |
FR (1) | FR2698880B1 (fr) |
WO (1) | WO1994012648A2 (fr) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1996021028A3 (fr) * | 1995-01-03 | 1996-09-12 | Procept Inc | Recepteurs de lymphocytes t heterodimeres solubles et leurs anticorps |
US7029848B2 (en) | 1998-06-12 | 2006-04-18 | Galapagos Genomics N.V. | High throughput screening of gene function using libraries for functional genomics applications |
EP3333186A1 (fr) * | 2012-03-28 | 2018-06-13 | Gadeta B.V. | Échange de chaîne de récepteurs de lymphocytes t gamma 9 delta 2 combinatoires |
EP1289564B1 (fr) * | 2000-06-05 | 2018-07-18 | Altor BioScience Corporation | Fusions et conjugues de recepteurs de lymphocytes t et procedes d'utilisation correspondants |
US11166984B2 (en) | 2016-06-10 | 2021-11-09 | Umc Utrecht Holding B.V. | Method for identifying δT-cell (or γT-cell) receptor chains or parts thereof that mediate an anti-tumour or an anti-infective response |
US12161669B2 (en) | 2017-05-18 | 2024-12-10 | Umc Utrecht Holding B.V. | Compositions and methods for cell targeting therapies |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
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US6759243B2 (en) | 1998-01-20 | 2004-07-06 | Board Of Trustees Of The University Of Illinois | High affinity TCR proteins and methods |
AU1218000A (en) | 1998-10-21 | 2000-05-08 | Sunol Molecular Corporation | Polyspecific binding molecules and uses thereof |
WO2002046400A2 (fr) * | 2000-12-08 | 2002-06-13 | The Board Of Trustees Of The University Of Illinois | Proteines mutantes du complexe majeur d'histocompatibilite de classe ii |
AU2003235593A1 (en) * | 2002-01-10 | 2003-07-30 | National Jewish Medical And Research Center | USE OF SOLUBLE GammaDelta T CELL RECEPTORS FOR REGULATING T CELL FUNCTION |
US20040115216A1 (en) * | 2002-07-12 | 2004-06-17 | The Johns Hopkins University | Reagents and methods for engaging unique clonotypic lymphocyte receptors |
JP4773361B2 (ja) * | 2003-11-10 | 2011-09-14 | アルター・バイオサイエンス・コーポレーション | 可溶性tcr分子とその使用方法 |
CA2948812A1 (fr) * | 2014-04-10 | 2015-10-15 | Stichting Vumc | Immunoglobulines liant les recepteurs des cellules t humaines v.gamma.9v.delta.2 |
KR20230132604A (ko) | 2015-01-27 | 2023-09-15 | 라바 테라퓨틱스 엔.브이. | Cd1d를 표적화하는 단일 도메인 항체 |
EP3853255A1 (fr) | 2018-09-19 | 2021-07-28 | Lava Therapeutics B.V. | Nouveaux anticorps bispécifiques destinés à être utilisés dans le traitement d'hémopathies malignes |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5340921A (en) * | 1986-07-03 | 1994-08-23 | T Cell Sciences, Inc. | Γ, δT cell receptor and methods and detection |
US5260223A (en) * | 1986-07-03 | 1993-11-09 | President & Fellows Of Harvard College | Methods for detection of human gamma, γ T cell receptor |
US5216132A (en) * | 1990-01-12 | 1993-06-01 | Protein Design Labs, Inc. | Soluble t-cell antigen receptor chimeric antigens |
US5314995A (en) * | 1990-01-22 | 1994-05-24 | Oncogen | Therapeutic interleukin-2-antibody based fusion proteins |
US6416971B1 (en) * | 1990-05-15 | 2002-07-09 | E.R. Squibb & Sons, Inc. | Soluble single chain T cell receptors |
-
1992
- 1992-11-25 FR FR9214203A patent/FR2698880B1/fr not_active Expired - Fee Related
-
1993
- 1993-11-25 AU AU55668/94A patent/AU5566894A/en not_active Abandoned
- 1993-11-25 CA CA002128705A patent/CA2128705A1/fr not_active Abandoned
- 1993-11-25 JP JP6512850A patent/JPH07506495A/ja active Pending
- 1993-11-25 WO PCT/FR1993/001165 patent/WO1994012648A2/fr not_active Application Discontinuation
- 1993-11-25 EP EP94900880A patent/EP0624201A1/fr not_active Withdrawn
- 1993-11-25 US US08/256,964 patent/US5723309A/en not_active Expired - Lifetime
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1996021028A3 (fr) * | 1995-01-03 | 1996-09-12 | Procept Inc | Recepteurs de lymphocytes t heterodimeres solubles et leurs anticorps |
US7029848B2 (en) | 1998-06-12 | 2006-04-18 | Galapagos Genomics N.V. | High throughput screening of gene function using libraries for functional genomics applications |
EP1289564B1 (fr) * | 2000-06-05 | 2018-07-18 | Altor BioScience Corporation | Fusions et conjugues de recepteurs de lymphocytes t et procedes d'utilisation correspondants |
EP3333186A1 (fr) * | 2012-03-28 | 2018-06-13 | Gadeta B.V. | Échange de chaîne de récepteurs de lymphocytes t gamma 9 delta 2 combinatoires |
US10324083B2 (en) | 2012-03-28 | 2019-06-18 | Gadeta B.V. | Methods of treating cancer in a subject by administering a composition comprising gamma 9 delta 2 T-cell receptors |
US10578609B2 (en) | 2012-03-28 | 2020-03-03 | Gadeta B.V. | Nucleic acid molecules encoding combinatorial gamma 9 delta 2 T-cell receptors and methods of use thereof to treat cancer |
US11686724B2 (en) | 2012-03-28 | 2023-06-27 | Gadeta B.V. | Compositions comprising gamma 9 delta 2 T-cell receptors and methods of use thereof to treat cancer |
US11166984B2 (en) | 2016-06-10 | 2021-11-09 | Umc Utrecht Holding B.V. | Method for identifying δT-cell (or γT-cell) receptor chains or parts thereof that mediate an anti-tumour or an anti-infective response |
US11596654B2 (en) | 2016-06-10 | 2023-03-07 | Gadeta B.V. | Human leukocyte antigen restricted gamma delta T cell receptors and methods of use thereof |
US12297274B2 (en) | 2016-06-10 | 2025-05-13 | Umc Utrecht Holding B.V. | Method of cell therapy |
US12161669B2 (en) | 2017-05-18 | 2024-12-10 | Umc Utrecht Holding B.V. | Compositions and methods for cell targeting therapies |
Also Published As
Publication number | Publication date |
---|---|
CA2128705A1 (fr) | 1994-06-09 |
EP0624201A1 (fr) | 1994-11-17 |
FR2698880A1 (fr) | 1994-06-10 |
JPH07506495A (ja) | 1995-07-20 |
US5723309A (en) | 1998-03-03 |
FR2698880B1 (fr) | 1995-02-24 |
WO1994012648A3 (fr) | 1994-07-21 |
AU5566894A (en) | 1994-06-22 |
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