ANTIGEN/ANTIBODY SPECIFICITY EXCHANGER

Abstract: An antigen/antibody specificity exchanger is disclosed. It comprises: A) an amino-acid sequence corresponding to an amino-acid sequence of an antibody which specifically binds to a certain antigen, including hapten, B) linked by a link to C) an amino-acid sequence to which a certain antibody binds. Also, a diagnostic reagent comprising an antigen/antibody specificity exchanger according to the invention is disclosed. Said reagent may be e.g. used instead of antisera or monoclonal antibodies in in vitro testing systems, such as immunological tests. Further, a method of treating a disease or disorder caused by a known antigen in an individual in need of an increased number of antigen-specific antibodies is disclosed. In the method a tailor-made antigen/antibody specificity exchanger of the invention is issued. Said method may be e.g. used to redirect a patient's antibodies against poliovirus to fight HIV infection in said patient.

Description: ANTIGEN/ANTIBODY SPECIFICITY EXCHANGER The present invention relates to an antigen/antibody specificity exchanger, which comprises an amino-acid sequence which specifically binds to a certain antigen linked to an amino-acid sequence to which a certain antibody binds. In vitro the antigen/antibody specificity exchanger of the invention can be used as a diagnostic reagent instead of antisera or monoclonal antibodies in testing systems, and _in vivo it can be used to redirect antigens or antibodies to other antibodies or antigens, respectively, than they were originally directed to. Background During the past decade the antigenic structure of several viral proteins have been characterized using synthetic peptides, such as the human immunodeficiency virus-1 (HIV-1) gplβO, and the hepatitis B virus core/e antigens (HBc/eAg) . Recently it has been shown that a synthetic peptide corresponding to the complementarity determining region 3 of the heavy chain (CDRH3) of a monoclonal antibody (mAb; F58), directed to the variable third (V3) domain of HIV-1 gplβO, may act as a mini antibody and neutralize HIV-1 in vitro. In the experimental part of the present specification, the construction of synthetic peptides combining the CDRH3 domain of the mAb F58, or CDRH1, CDRH2, CDRH3 domain of Ab Cl-5, and antigenic regions derived from the HIV-1 gp41, HBc/e antigen, hepatitis C virus (HCV) core protein or from the poliovirus VP1, is shown. These peptides specifically bound the V3 domain of HIV-1. Thus, it was possible to modify the antigenic surface of HIV-1 V3 peptides. This antigen/antibody specificity exchanger will be used for redirecting the reactivity of circulating antibodies and using already existing antibody specificities for a predetermined purpose. It may also serve to alter the composition of the surface of proteins by the addition of foreign determinants. For example, the widely used poliovirus vaccination, together with the high rate of seropositivity to enteroviral proteins may be a suitable pool of antibodies to redirect against other pathogens, such as HIV. The complementary determining regions (CDRs) of antibodies are responsible for the specificity of the antibody (1,2) . X-ray crystallography has shown that the three CDRs of the variable (V) region of the heavy chain and the three CDRs of the V region of the light chain may all have contact with the epitope in an antigen-antibody complex (3) . Single peptides corresponding to the CDRs of mAbs to various antigens have been shown to mimic the recognition capabilities of the respective mAb (4-10) . Recently it was shown that a peptide corresponding to CDRH3 of a mAb specific for the V3 region of human immuno deficiency virus-1, holds neutralizing capacity when assayed in vitro (9) . It was also observed that the CDRH2 of a mAb to hepatitis B core antigen (HBcAg) is capable of capturing HBcAg (10) . Description of the invention The present invention is, in one aspect, directed to an antigen/antibody specificity exchanger, which comprises A) an amino-acid sequence corresponding to an amino-acid sequence of an antibody which specifically binds to a certain antigen, including hapten, B) linked by a link to C) an amino-acid sequence to which a certain antibody binds. The amino-acid sequence of A) may comprise additional amino acids or sequences on one or both sides of the amino-acid sequence of an antibody which specifically binds to a certain antigen, including hapten. Such additional amino acids and sequences may be, but are not limited to, the amino acids and sequences naturally occurring in said antibody as extensions to the amino- acid sequence of A) . The number of amino-acid residues in the amino-acid sequence of A) is preferably at least 5, and is together with possible extensions preferably less than 35. Further, the amino-acid sequence of C) may comprise additional amino acids or sequences on one or both sides of the amino-acid sequence to which a certain antibody binds. Such additional amino acids and sequences may be, but are not limited to, the amino acids and sequences naturally occurring as extensions to the amino-acid sequence of C) . The number of amino-acid residues in the amino-acid sequence of C) is preferably at least 5, and is together with possible extensions preferably less than 35. In an embodiment of the above aspect of the invention said antigen/antibody specificity exchanger of the invention is one wherein said amino-acid sequence of A) corresponds to an amino- acid sequence of a complementarity determining region (CDR) or a framework region of a certain antibody. In a further embodiment said antigen/antibody specificity exchanger of the invention is one wherein said amino-acid sequence of C) corresponds to an antibody-binding region of a certain protein, such as one of viral, bacterial or fungal origin. In another embodiment said antigen/antibody specificity exchanger of the invention is one wherein said amino-acid sequence of A) is linked to said amino-acid sequence of C) by a link B) , which is selected from the group consisting of a direct peptide bond and spacer molecules, such as an amino acid, an amino acid having two amino groups, linear or branched peptides or polypeptides and biotin-avidin-biotin. In a preferred embodiment said antigen/antibody specificity exchanger of the invention is one wherein said amino-acid sequence of A) is selected from the group consisting of SEQ ID NO: 1: Cys Asp Leu lie Tyr Tyr Asp Tyr Glu Glu Asp Tyr Tyr Phe SEQ ID NO: 2: Cys Asp Leu lie Tyr Tyr Asp Tyr Glu Glu Asp Tyr Tyr SEQ ID NO: 3 Thr Tyr Ala Met Asn SEQ ID NO: 4 Arg Val Arg Ser Lys Ser Phe Asn Tyr Ala Thr Tyr Tyr Ala Asp Ser Val Lys Gly and SEQ ID NO: 5 Pro Ala Gin Gly He Tyr Phe Asp Tyr Gly Gly Phe Ala Tyr In another preferred embodiment said antigen/antibody specificity exchanger of the invention is one wherein said amino-acid sequence of C) is selected form the group consisting of SEQ ID NO: 6: Pro Pro Asn Ala Pro He Leu Ser SEQ ID NO: 7: Arg Pro Pro Asn Ala Pro He Leu Ser Thr SEQ ID NO: 8: Lys Glu He Pro Ala Leu Thr Ala Val Glu Thr Gly SEQ ID NO: 9: Pro Ala His Ser Lys Glu He Pro Ala Leu Thr Ala SEQ ID NO: 10: Trp Gly Cys Ser Gly Lys Leu He Cys Thr SEQ ID NO: 11: Cys Thr Thr Ala Val Pro Trp Asn Ala Ser and SEQ ID NO: 12: Gin Arg Lys Thr Lys Arg Asn Thr Asn Arg Arg. Specific examples of antigen/antibody specificity exchangers of the invention: Peptide 1: SEQ ID NO: 13 Cys Asp Leu He Tyr Tyr Asp Tyr Glu Glu Asp Tyr Tyr Phe Pro Pro Asn Ala Pro He Leu Ser Peptide 2: SEQ ID NO: 14 Cys Asp Leu He Tyr Tyr Asp Tyr Glu Glu Asp Tyr Tyr Phe Arg Pro Pro Asn Ala Pro He Leu Ser Thr Peptide 3: SEQ ID NO: 15 Cys Asp Leu He Tyr Tyr Asp Tyr Glu Glu Asp Tyr Tyr Phe Lys Glu He Pro Ala Leu Thr Ala Val Glu Thr Gly Peptide 4: SEQ ID NO: 16 Cys Asp Leu He Tyr Tyr Asp Tyr Glu Glu Asp Tyr Tyr Phe Pro Ala His Ser Lys Glu He Pro Ala Leu Thr Ala Peptide 5: SEQ ID NO: 17 Cys Asp Leu He Tyr Tyr Asp Tyr Glu Glu Asp Tyr Tyr Phe Trp Gly Cys Ser Gly Lys Leu He Cys Thr Peptide 6: SEQ ID NO: 18 Cys Asp. Leu He Tyr Tyr Asp Tyr Glu Glu Asp Tyr Tyr Phe Cys Thr Thr Ala Val Pro Trp Asn Ala Ser Peptide 7: SEQ ID NO: 19 Cys Asp Leu He Tyr Tyr Asp Tyr Glu Glu Asp Tyr Tyr Phe Ly_T~Kfg Pro Pro Asn Ala Pro He Leu Ser Thr Cys Asp Leu He Tyr Tyr Asp Tyr Glu Glu Asp Tyr Tyr ~ T>he Peptide 8: SEQ ID NO: 20 Thr Tyr Ala Met Asn Pro Pro Asn Ala Pro He Leu Ser Peptide 9: SEQ ID NO: 21 Arg Val Arg Ser Lys Ser Phe Asn Tyr Ala Thr Tyr Tyr Ala Asp Ser Val Lys Gly Pro Pro Asn Ala Pro He Leu Ser Peptide 10: SEQ ID NO: 22 Pro Ala Gin Gly He Tyr Phe Asp Tyr Gly Gly Phe Ala Tyr Pro Pro Asn Ala Pro He Leu Ser Peptide 11: SEQ ID NO: 23 Cys Asp Leu He Tyr Tyr Asp Tyr Glu Glu Asp Tyr Tyr Gin Arg Lys Thr Lys Arg Asn Thr Asn Arg Arg Another aspect of the invention is directed to a diagnostic reagent comprising an antigen/antibody specificity exchanger according to the invention. Such a diagnostic reagent of the invention may be used to detect in vitro specific antigens in biological samples, e.g. body fluid or tissue samples. Thus, the diagnostic reagent of the invention may be used instead of antisera or monoclonal antibodies in in vitro testing systems, such as immunological tests, e.g. Enzyme- Linked Immunosorbent Assay (ELISA) , Enzyme Immunoassay (EIA) , Western Blot, Radioimmunoassay (RIA) etc. Further, the diagnostic reagent of the invention may be used to investigate biological properties of biological systems. Still another aspect of the invention is directed to a method of treating a disease or disorder caused by a known antigen in an individual in need of an increased number of antigen-specific antibodies, which comprises administration to said individual of a sufficient amount of a tailor-made antigen/antibody specificity exchanger according to the invention which binds to certain antibodies known to exist in said individual. An individual in need of an increased number of antigen-specific antibodies against a known antigen, which causes a disease or disorder in said individual, may be one who will benefit from getting a rapid increase in the number of such antigen-specific antibodies, or who even lacks or has insufficient ability to elicit antibodies against said known antigen. Said " individual may be a human or non-human mammal. Such a tailor-made antigen/antibody specificity exhanger according to the invention is designed so that certain antibodies existing in the patient in question, (e.g. antibodies against viral proteins, such as antibodies against poliovirus, antibodies against virus causing measles, antibodies against hepatitis B virus, antibodies against hepatitis C virus, antibodies against HIV-1, whether induced by natural infection or vaccination) binds to the amino-acid sequence of C) and the amino-acid sequence of A) binds to a known antigen causing a disease or disorder in said patient (e.g. HIV) . Thus, existing antibodies in said patent are redirected to said known antigen (against which said patient e.g. lacks or has insufficient amount of desired antibodies) . A specific example of an antigen/antibody specificity exchanger of the invention is a peptide which binds to antibodies against poliovirus and also binds specifically to HIV virus. Thus, already high titres in a patient of antibodies against poliovirus may thus be used to fight HIV infection in said patient. Preparation of the antigen/antibody specificity exchanger of the invention The antigen/antibody specificity exchanger of the invention is prepared in any suitable manner known in the art. It is in most cases a peptide, with the exception of the case when it comprises biotin-avidin-biotin as a linker. As is well-know in the art, peptides can be produced by genetic engineering methods or peptide synthesis. In peptide synthesis one amino-acid residue is coupled to the next one in liquid phase, or starting with the solid phase to which the C-terminal of the first amino acid is coupled, whereupon the C-terminal of the next amino acid is coupled to the N-terminal of the first amino acid, etc, finally releasing the build-up peptide from the solid phase. The antigen/antibody specificity exchangers presented in Table 1 are all synthetic peptides synthesized according to a method for multiple peptide synthesis (21) and by a Milligen 9050 peptide synthesizer using 9-fluorenylmethoxy-carbonyl-protected amino acid esters (20) . All peptides were analysed and/or purified by reverse phase HPLC using a Pep-S 5m column (Pharmacia-LKB, Uppsala, Sweden) , run with a gradient from 10% to 60% CH3CN against water containing 0.1% trifluoro-acetic acid. Testing of the antigen/antibody specificity exchanger of the invention Monoclonal antibodies and human sera. The production and characterization of mAb to HBc/eAg has been described (15, 18) . The mAb 14E11 recognizes the epitope at residues 135-141 (PNAPILS) , of the HBc/eAg sequence (15) . The monoclonal antibody 14E11 was kindly provided by Dr. Alexander Cimanis, Riga. Two human sera (A and B) reactive to a peptide covering residues 42-55 of VPl of poliovirus 1 have previously been described (19) . A monoclonal antibody against enteroviral VPl was purchased from Dako (CBV; M7064, Dako, Copenhagen, Denmark) Three human sera (C, D and E) positive for antibodies to hepatitis C virus (HCV) core residues 7-19 have previously been described (20) . Enzyme immuno assays (EIAs) . Strain-specific HIV-1 V3 peptides were coated on microtiter wells (Nunc 96F Certificated; Nunc, Copenhagen, Denmark) in 100 ml portions at concentrations of from 10 mg/ml to 0.01 mg/ml in 0.05 M sodium carbonate buffer, pH 9.6, at +4°C overnight. Excess peptides were removed by washing with PBS containing 0.05% Tween 20. The peptide-coated plates were assayed for binding using the peptides of the invention diluted from 100 mg/ml to 0.01 mg/ml in PBS containing 1% BSA, 2% goat serum, and 0.05% Tween 20. The dilutions of the peptides of the invention were added in 100 ml portions and incubated with the adsorbed V3 peptides for 60 minutes at +37°C. Excess test peptides were removed by washing and bound peptide was indicated by the respective mAb or anti- serum, by incubation for 60 minutes at +37°C. The amount of bound antibody was indicated by an additional incubation of enzyme- labelled secondary antibody, rabbit anti-mouse lg (P260, Dako, Copenhagen, Denmark) for mAbs, and goat anti-human IgG (A-3150; Sigma Chemicals, St. Louis, MO) for human antibodies. The amount of bound conjugate was determined by addition of substrate and the absorbances were measured at 492 nm or 405 nm in a spectrophoto-meter. Antibody recognition of peptides of the invention. When adsorbed to microplates all peptides of the invention presented in Table 1 except for Nos. 4 (Table 2) and 7 (data not shown) were found to be reactive with the respective antibodies. Antigen binding of the peptides of the invention. The anti- genically functional test peptides were further evaluated for binding of HIV-1 V3 peptide, MN-strain. All test peptides which had a functional antigenic region were found to directly bind to the HIV-1 V3 peptide (Tables 3 and 4) . As shown in Tables 3 and 4, the reactivity to the HIV-1 V3 peptide was found to be dependent on both concentrations of the test peptides and of V3 peptides, indicating a specific reactivity. This clearly indicates that it was possible to redirect antibodies specific for HIV-1 gp41, HBc/eAg and poliovirus 1 VPl to bind to the altered antigenic surface of the HIV-1 V3 peptide. It was also found, that pre-incubation of equimolar concentrations of mAb 14E11 and the corresponding test peptide of the invention, did not change the ability of the test peptide mAb complex to bind to the V3 peptide (data not shown) . This indicates that it is possible to add antigenic domains to a CDR peptide with retained antigen binding ability of the CDR sequence. The ability of the antigen/antibody specificity exchangers to redirect antibodies was further evaluated in a system where the CDRH1, CDRH2 and CDRH3 sequences from mAb Cl-5 were added to the epitope sequence for mAb 14E11. A peptide corresponding to the epitope sequence for mAb Cl-5, residues 71-90 of HBc/eAg with an He at position 80, was adsorbed to microplates. The antigen/- antibody specificity exchangers, based on the Cl-5 CDRs, were then added, and the amount bound CDR peptide was indicated by the epitope specific mAb 14E11. The results clearly showed that the mAb 14E11 which originally recognized residues 134-141 of the HBc/eAg sequence was redirected by the antigen/antibody specificity exhanger containing the CDRH2 sequence (Table 5) . Also, this reactivity was dependent on the amount CDR added, indicating a specific reaction (p<0.01, Regression analysis; Table 5) . Further, in Table 7 is shown that the antigen/antibody specificity exchanger of the invention can redirect an existing HBc/eAg specific antibody to significantly bind to HIV-1 V3 peptides of several different subtypes. Thus, it is evident that the antigen/antibody exchanger of the invention forms the basis of a novel method for redirecting the specificity of monoclonal and polyclonal antibodies by modifying the antigenic surface of a viral protein. It should be understood that the invention comprises antigen/antibody exchangers wherein included amino-acid sequences are chemically stabilized e.g. by cyclization and wherein included amino-acid sequences may have specific amino-acid deletions, additions and/or substitutions. Such modified amino- acid sequences may result in antigen/antibody exchangers exhibiting increased (or decreased) biological activities. Table. 1. Antigen/antibody specificity exchangers of the invention represented by peptides containing the CDRH3 domain of mAb F58 or CDRHl, CDRH2, CDRH3 domain of mAb Cl-5 (A) and different antigenic regions derived from viral proteins (C) . Peptide Amino-acid link (B) Amino-acid Source of Ref. No. sequence (A) sequence (C) aas (C) 1. SEQ ID NO 1. peptide SEQ ID NO 6 HBc/eAg, 15 bond aas 134-141 2. SEQ ID NO 1. peptide SEQ ID NO 7 HBc/eAg, 15 bond aas 133-142 3. SEQ ID NO 1. peptide SEQ ID NO 8 Polio VPl, aas 39-50 16 bond 4. SEQ ID NO 1. peptide SEQ ID NO 9 Polio VPl, aas 35-46 16 bond 5. SEQ ID NO 1. peptide SEQ ID NO 10 HIV-1 gp41, 20 bond aas 596-605 6. SEQ ID NO 1. peptide SEQ ID NO 11 HIV-1 gp41 20 bond aas 603-612 7. 2 (SEQ ID NO 1) Lys SEQ ID NO 7 HBc/eAg, 15 ass 133-142 8. SEQ ID NO 3. peptide SEQ ID NO 6 HBc/eAg, 15 bond aas 134-141 9. SEQ ID NO 4. peptide SEQ ID NO 6 HBc/eAg, 15 bond aas 134-141 10. SEQ ID NO 5. peptide SEQ ID NO 6 HBc/eAg, 15 bond aas 134-141 11. SEQ ID NO 2. peptide SEQ ID NO 12 HCV core 8-1! 22 bond Note: aas = amino acids Table 2. Testing of antigen/antibody specificity exchanger of the invention represented by peptides passively adsorbed to polystyrene for ability to be recognized by antibodies specific for the antigenic region presented in the peptide. Values are given as the absorbance obtained at 492 or 405 nm. Peptide Antibody Amount peptide added (ng/0.1 ml) to solid phase No. used 1.000 100 10 1 0.1 0.01 1 14E11 2.500 1.675 0.030 0.010 0.009 0.008 2 14E11 2.500 1.790 0.008 0.006 0.008 0.006 3 CBV 2.500 1.142 0.036 0.020 0.019 0.036 human A 1.945 1.850 0.486 0.088 0.115 0.116 human B 1.342 0.770 0.130 0.065 0.090 0.095 4 CBV 0.020 0.018 0.015 0.016 0.017 0.018 human A 0.059 0.081 0.108 0.109 0.097 0.100 human B 0.052 0.072 0.091 0.098 0.083 0.100 Note: Regression analysis of the relation between absorbance and peptide concentration gives p<0.01. Table 3, Testing of the HIV-1 V3 peptide-antigen binding capability of the CDR sequence simultaneously with the ability to be recognized by monoclonal antibodies specific for the antigenic region on the test peptide of the invention. Values are given as the absorbance at 492 nm. a: Anti- Amount of Amount V3 peptide added Peptide body test peptide (ng/0.1 ml) to solid phase No. used (ng/0.1 ml) 1.000 500 250 125 62.5 31.25 14E11 10,000 2.500 2.500 2.500 2.338 1.702 1.198 5,000 2.500 2.500 2.500 2.190 1.622 1.122 2,500 2.500 2.500 2.500 2.039 1.394 0.990 1,250 2.500 2.500 2.500 1.712 0.930 0.771 625 1.936 0.824 0.380 0.152 0.056 0.053 312 0.196 0.085 0.044 0.043 0.030 0.025 Note: Regression analysis of the relation between absorbance and CDR peptide concentration, and relation between absorbance and V3 peptide concentration gives p<0.01, respectively. Peptide Anti- Amount of No . body test used peptide Amount of V3 peptide added (ng/0.1 ml) (ng/0. 1 ml) 1. 000 500 250 125 62.5 31.25 1.4E11 10.000 2.500 2.500 2.133 1.560 1.070 0.829 5.000 2.500 2.500 1.963 1.645 1.074 0.981 2.500 2.500 2.500 1.729 1.404 0.962 0.747 1.250 2.500 2.424 1.433 1.327 0.795 0.488 625 0.835 0.359 0.200 0.120 0.088 0.073 312 0.099 0.054 0.042 0.049 0.045 0.025 Anti¬ Amount <of Amount peptide added Peptide body test peptide (ng/ 0.1 ml) to solid phase No. used (ng/0.1 ml) 1.000 100 10 1 0.1 0.01 3 CBV 10,000 0.523 0.498 0.162 0.161 0.017 0.017 1,000 0.053 0.054 0.031 0.027 0.010 0.010 100 0.034 0.037 0.025 0.029 0.010 0.010 10 0.023 0.022 0.014 0.014 0.010 0.009 1 0.013 0.044 0.014 0.017 0.027 0.009 0.1 0.011 0.009 0.008 0.032 0.013 0.013 Note : Regression analysis of the relation between absorbance and CDR peptide concentration, and relation between absorbance and V3 peptide concentration gives p<0.01 , respectively. Table 4. Testing of the HIV-1 V3 peptide antigen binding capability of the CDR sequence simultaneously with the ability to be recognized by human anti-polio VPl polyclonal antibodies specific for the antigenic region on the test peptides of the invention. Values are given as the absorbance at 405 nm. a: Anti¬ Amount of Amount V3 peptide added Peptide body test peptide (ng/0.1 ml) to solid phase No. used (ng/0.1 ml) 1.000 500 250 125 62.5 31.25 3 human A 10,000 1.538 1.356 1.448 1.052 0.280 0.123 5,000 1.179 1.050 1.006 0.557 0.136 0.087 2,500 0.684 0.558 0.604 0.216 0.084 0.067 1,250 0.367 0.358 0.332 0.162 0.075 0.062 625 0.228 0.238 0.220 0.121 0.083 0.063 312 0.171 0.154 0.154 0.103 0.072 0.060 Note: Regression analysis of the relation between absorbance and CDR peptide concentration, and relation between absorbance and V3 peptide concentration gives p<0.01, respectively. Table 4, continued. b: Anti- Amount of Amount V3 peptide added Peptide body test peptide (ng/0.1 ml) to solid phase No. used (ng/0.1 ml) 1.000 500 250 125 62.5 31.25 3 human B 10,000 0.366 0.352 0.352 0.200 0.074 0.056 5,000 0.206 0.217 0.188 0.131 0.063 0.053 2,500 0.134 0.132 0.126 0.091 0.061 0.055 1,250 0.107 0.114 0.108 0.077 0.060 0.054 625 0.082 0.104 0.087 0.075 0.063 0.056 312 0.083 0.091 0.094 0.077 0.068 0.060 Note: Regression analysis of the relation between absorbance and CDR peptide concentration, and relation between absorbance and V3 peptide concentration gives p<0.01, respectively. Table 5. Testing of the HIV-1 V3 peptide antigen capability of the CDR sequence simultaneous with the ability to be recognized by human anti-HCV core polyclonal anti¬ bodies specific for the antigenic region on the test peptides of the invention. Values are given as the absorbance at 405 nm. Peptide Anti- Amount Amount of test peptide added No. body of V3 (ng/0.1 ml) used pepitide (ng/0.1 ml) 62 31 15 7.5 3.7 1.8 11 human HCV-C 625 2.500 2.416 2.097 1.473 0.973 0.630 78 2.500 2.335 1.781 1.225 0.825 0.564 39 2.389 2.287 1.626 1.081 0.664 0.389 11 human HCV-D 625 1.999 1.490 1.184 0.751 0.458 0.428 78 1.758 1.370 1.025 0.612 0.468 0.380 39 1.643 0.993 0.833 0.497 0.343 0.287 11 human HCV-E 625 2.368 2.165 1.656 1.104 0.645 0.462 78 2.156 1.824 1.396 0.733 0.514 0.352 39 1.893 1.683 1.110 0.756 0.310 0.272 Table 6. Testing of Cl-5 CDRs ( lOug/ml ) ( in test peptides of the invention) with a peptide corresponding to HBc/eAg corresponding to residues 71-90) coated on solid phase . Bound CDR was indicated by the epitope specific mAb 14E11 . CDR sequence Anti- Amount body c71-90 used peptide Amount of test peptide added (ng/O . lml) (ng/0. 1 ml) 10. 000 5. 000 2. 500 1.250 625 312 Peptide 8: 14E11 625 0. 003 0.002 0.002 0.002 0.002 0.002 CDRHl 312 0. 002 0.002 0.004 0.003 0.006 0.004 (SEQ ID N03) 78 0. ,003 0.003 0.005 0.005 0.003 0.003 Peptide 9: 14E11 625 2. .500 1.303 0.070 0.012 0.003 0.002 CDRH2 312 2. .500 1.070 0.058 0.011 0.003 0.002 (SEQ ID N04) 78 2. ,500 0.868 0.039 0.008 0.003 0.003 Peptide 10: 14E11 625 0. .004 0.003 0.004 0.003 0.003 0.003 CDRH3 312 0, .004 0.003 0.004 0.004 0.003 0.003 (SEQ ID N05) 78 0. .005 0.004 0.005 0.005 0.004 0.004 Table 7. Redirecting existing HBc/eAg specific antibody (14E11, from Dr. A. Tsimanis, Riga) to different subtype- specific HIV-1 V3 peptides (subtypes A-E) via specificity exchanger peptide containing CDRH3 sequence against HIV-1 and a HBc/eAg epitope for mAb 14E11. HIV-1 V3 peptide attached Reactivity (absorbance at 405 nm) of specificity to solid- exchanger peptide added in the indicated amount (ng) phase 500 250 125 62.5 31.25 15.625 Subtype A 0.378 0.126 0.078 0.068 0.062 0.017 Subtype B 2.686 2.536 1.710 1.329 0.360 0.157 Subtype C 1.261 0.514 0.111 0.077 0.051 0.020 Subtype D 0.17 0.079 0.065 0.028 0.029 0.026 Subtype E 0.22 0.090 0.093 0.032 0.063 0.030 References I. Kabat, E.A., Wu, T.T. & Bilofsky, H. (1976) Proc Natl Acad Sci USA 73, 4471. 2. Kieber, E.T. & Kohler, H. (1986) Immunol Rev 90, 29. 3. Amit, A.G., Maruzzia, R.A., Phillips, S.E.V. & Poljak, R.J. (1986) Science 233, 747. 4. Williams, W.V., Guy, R., Rubin, D.H., Robey, F., Myers, J.N., Kieber, E.T., Weiner, D.B. & Greene, M.I. (1988) Proc Natl Acad Sci USA 85, 6488. 5. Williams, W.V., Moss, D.A., Kieber, E.T., Choen, J.A., Myers, J.N., Weiner, D.B. & Green, M.L. (1989) Proc. Natl. Acad. Sci. USA 87, 5537. 6. Taub, R., Gould, R.J., Garsky, V.M., Ciccarone, T.M., Hoxie, J., Friedman, P.A. & Shattil, S.J. (1989) J. Biol. Chem. 264, 259. 7. Cohen, J.A., Williams, W.W., Weiner, D.B., Geller, H.M. & Greene, M.I. (1990) Proc. Natl. Acad. Sci. USA 87, 492. 8. Williams, V.W., Kieber, E.T., VonFeldt, J., Greene, M.I, & Weiner, D.B. (1991) J. Biol. Chem. 266, 5182. 9. Levi, M., Sallberg, M., Ruden, U., Herlyn, D., Maruyarna, H., Wigzell, H., Marks, J. & Wahren, B. (1993) Proc Natl Acad Sci USA 90, 4374. 10. Sallberg. M., Levi, M., Ruden, U., Pushko, P., Bichko, V., Magnius, L.O., Tsimanis, A. & Wahren, B. in Peptides: Chemistry and Biology (eds. Hodges, R. & Rivier, J.) In press (ESCOM, Leiden, 1993) . II. Machida, A., Ohnuma, H., Takai, E., Tsuda, F., Tanaka, T., Naito, M., Munekata, E., Miyakawa, Y. / Mayurni, m. (1989) Mol. Immunol. 26, 431. 12. Salfeld, J., Pfaff, E., Noah, M. & Schaller, H. (1989) J. Virol. 63, 798. 13. Sallberg, M., Ruden, U " . , Magnius, L.O., Harthus, H.P., Noah, M. & Wahren, B. (1991) J. Med. Virol. 33, 248. 15. Sallberg, M., Pushko, P., Berzinsh, I., Bishko, V., Sillekens, P., Noah, M., Pumpens, P., Gren, E., Wahren, B. & Magnius, L.O. (1993) J. Gen. Virol. 74, 1335. 16. Roivanen, M., Narvanen, A., Korkolainen, M., Huhtala, M- L & Hovi, T. (1991) Virol 180, 99-107. 18. Bichko, V.V., Schodel, F., Nassal, M., Grene, E., Berzinsh, I., Borisova, G., Miska, S., Peterson, D.L, Gren, E. & Will, H. (1993) Mol. Immunol. 30, 221. 19. Cello, J., Samuelsson, A., Stalhandske, P., Svennerholm, B., Jeansson, S. & Forsgren, M. (1993) J. Clin. Microbiol. 31, 911-916. 20. ZX Zhang, M Chen, K Wallhagen, J Trojnar, LO Magnius, B Wahren, & M Sallberg. Molecular basis for antibody cross- reactivity between the hepatitis C virus core protein and the host-derived GOR protein. Clin. Exp. Immunol. 1994; in press. 21. Hougthen, R.A. (1985) Proc. Natl. Acad. Sci. USA 82, 5131. SEQUENCE LISTING (1) GENERAL INFORMATION: (i) APPLICANT: (A) NAME: Ferring AB (B) STREET: Box 30047 (C) CITY: Malmo ( (EE)) CCOOUUNNTTRRYY:: SSwweeddeenn (F) POSTAL CODE (ZIP) : S-200 61 (G) TELEPHONE: 040-361000 (H) TELEFAX: 040-154795 (ii) TITLE OF INVENTION: Antigen/antibody specificity exchanger (iii) NUMBER OF SEQUENCES: 23 (iv) COMPUTER READABLE FORM: (A) MEDIUM TYPE: Floppy disk (B) COMPUTER: IBM PC compatible (C) OPERATING SYSTEM: PC-DOS/MS-DOS (D) SOFTWARE: PatentIn Release #1.0, Version #1.25 (EPO) (2) INFORMATION FOR SEQ ID NO: 1: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 14 amino acids (B) TYPE: amino acid (D) TOPOLOGY: linear (ii) MOLECULE TYPE: peptide (iii) HYPOTHETICAL: NO (v) FRAGMENT TYPE: internal (xi) SEQUENCE DESCRIPTION: SEQ ID NO: 1: Cys Asp Leu He Tyr Tyr Asp Tyr Glu Glu Asp Tyr Tyr Phe 1 5 10 (2) INFORMATION FOR SEQ ID NO: 2: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 13 amino acids (B) TYPE: amino acid (D) TOPOLOGY: linear (ii) MOLECULE TYPE: peptide (iii) HYPOTHETICAL: NO (v) FRAGMENT TYPE: internal (xi) SEQUENCE DESCRIPTION: SEQ ID NO: 2: Cys Asp Leu He Tyr Tyr Asp Tyr Glu Glu Asp Tyr Tyr 1 5 10 (2) INFORMATION FOR SEQ ID NO: 3: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 5 amino acids (B) TYPE: amino acid (D) TOPOLOGY: linear (ii) MOLECULE TYPE: peptide (iii) HYPOTHETICAL: NO (v) FRAGMENT TYPE: internal (xi) SEQUENCE DESCRIPTION: SEQ ID NO: 3: Thr Tyr Ala Met Asn 1 5 (2) INFORMATION FOR SEQ ID NO: 4: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 19 amino acids (B) TYPE: amino acid (D) TOPOLOGY: linear (ii) MOLECULE TYPE: peptide (iii) HYPOTHETICAL: NO (v) FRAGMENT TYPE: internal (xi) SEQUENCE DESCRIPTION: SEQ ID NO: 4: Arg Val Arg Ser Lys Ser Phe Asn Tyr Ala Thr Tyr Tyr Ala Asp Ser 1 ■ 5 10 15 Val Lys Gly (2) INFORMATION FOR SEQ ID NO: 5: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 14 amino acids (B) TYPE: amino acid (D) TOPOLOGY: linear (ii) MOLECULE TYPE: peptide Iiii) HYPOTHETICAL: NO (v) FRAGMENT TYPE: internal (xi) SEQUENCE DESCRIPTION: SEQ ID NO: 5: Pro Ala Gin Gly He Tyr Phe Asp Tyr Gly Gly Phe Ala Tyr 1 5 10 (2) INFORMATION FOR SEQ ID NO: 6: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 8 amino acids (B) TYPE: amino acid (D) TOPOLOGY: linear (ii) MOLECULE TYPE: peptide (iii) HYPOTHETICAL: NO (v) FRAGMENT TYPE: internal (xi) SEQUENCE DESCRIPTION: SEQ ID NO: 6: Pro Pro Asn Ala Pro He Leu Ser 1 5 (2) INFORMATION FOR SEQ ID NO: 7: (i) SEQUENCE CHARACTERISTICS: ■ (A) LENGTH: 10 amino acids (B) TYPE: amino acid (D) TOPOLOGY: linear (ii) MOLECULE TYPE: peptide (iii) HYPOTHETICAL: NO (v) FRAGMENT TYPE: internal (xi) SEQUENCE DESCRIPTION: SEQ ID NO: 7: Arg Pro Pro Asn Ala Pro He Leu Ser Thr 1 5 10 (2) INFORMATION FOR SEQ ID NO: 8: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 12 amino acids (B) TYPE: amino acid (D) TOPOLOGY: linear (ii) MOLECULE TYPE: peptide (iii) HYPOTHETICAL: NO (v) FRAGMENT TYPE: internal (xi) SEQUENCE DESCRIPTION: SEQ ID NO: 8: Lys Glu He Pro Ala Leu Thr Ala Val Glu Thr Gly 1 5 10 [2) INFORMATION FOR SEQ ID NO: 9: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 12 amino acids (B) TYPE: amino acid (D) TOPOLOGY: linear (ii) MOLECULE TYPE: peptide (iii) HYPOTHETICAL: NO (v) FRAGMENT TYPE: internal (xi) SEQUENCE DESCRIPTION: SEQ ID NO: 9: Pro Ala His Ser Lys Glu He Pro Ala Leu Thr Ala 1 5 10 (2) INFORMATION FOR SEQ ID NO: 10: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 10 amino acids (B) TYPE: amino acid (D) TOPOLOGY: linear (ii) MOLECULE TYPE: peptide (iii) HYPOTHETICAL: NO (v) FRAGMENT TYPE: internal (xi) SEQUENCE DESCRIPTION: SEQ ID NO: 10: Trp Gly Cys Ser Gly Lys Leu He Cys Thr 1 5 10 (2) INFORMATION FOR SEQ ID NO: 11: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 10 amino acids (B) TYPE: amino acid (D) TOPOLOGY: linear (ii) MOLECULE TYPE: peptide (iii) HYPOTHETICAL: NO (v) FRAGMENT TYPE: internal (xi) SEQUENCE DESCRIPTION: SEQ ID NO: 11: Cys Thr Thr Ala Val Pro Trp Asn Ala Ser 1 5 10 (2) INFORMATION FOR SEQ ID NO: 12: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 11 amino acids (B) TYPE: amino acid (D) TOPOLOGY: linear (ii) MOLECULE TYPE: peptide (iii) HYPOTHETICAL: NO (v) FRAGMENT TYPE: internal (xi) SEQUENCE DESCRIPTION: SEQ ID NO: 12: Gin Arg Lys Thr Lys Arg Asn Thr Asn Arg Arg 1 5 10 (2) INFORMATION FOR SEQ ID NO: 13: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 22 amino acids 5 (B) TYPE: amino acid (D) TOPOLOGY: linear (ii) MOLECULE TYPE: peptide 10 (iii) HYPOTHETICAL: NO (v) FRAGMENT TYPE: internal 15 (xi) SEQUENCE DESCRIPTION: SEQ ID NO: 13: Cys Asp Leu He Tyr Tyr Asp Tyr Glu Glu Asp Tyr Tyr Phe Pro Pro 1 5 10 15 20 Asn Ala Pro He Leu Ser 20 25 (2) INFORMATION FOR SEQ ID NO: 14: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 24 amino acids (B) TYPE: amino acid 30 (D) TOPOLOGY: linear (ii) MOLECULE TYPE: peptide (iii) HYPOTHETICAL: NO 35 (v) FRAGMENT TYPE: internal (xi) SEQUENCE DESCRIPTION: SEQ ID NO: 14: 40 Cys Asp Leu He Tyr Tyr Asp Tyr Glu Glu Asp Tyr Tyr Phe Arg Pro 1 5 10 15 Pro Asn Ala Pro He Leu Ser Thr 45. 20 (2) INFORMATION FOR SEQ ID NO: 15: 50 (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 26 amino acids (B) TYPE: amino acid (D) TOPOLOGY: linear 55 (ii) MOLECULE TYPE: peptide (iii) HYPOTHETICAL: NO (v) FRAGMENT TYPE: internal (xi) SEQUENCE DESCRIPTION: SEQ ID NO: 15: Cys Asp Leu He Tyr Tyr Asp Tyr Glu Glu Asp Tyr Tyr Phe Lys Glu 1 5 10 15 He Pro Ala Leu Thr Ala Val Glu Thr Gly 20 25 (2) INFORMATION FOR SEQ ID NO: 16: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 26 amino acids (B) TYPE: amino acid (D) TOPOLOGY: linear (ii) MOLECULE TYPE: peptide (iii) HYPOTHETICAL: NO (v) FRAGMENT TYPE: internal (xi) SEQUENCE DESCRIPTION: SEQ ID NO: 16: Cys Asp Leu He Tyr Tyr Asp Tyr Glu Glu Asp Tyr Tyr Phe Pro Ala 1 5 ~ 10 15 His Ser Lys Glu He Pro Ala Leu Thr Ala 20 25 (2) INFORMATION FOR SEQ ID NO: 17: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 24 amino acids (B) TYPE: amino acid (D) TOPOLOGY: linear (ii) MOLECULE TYPE: peptide (iii) HYPOTHETICAL: NO (v) FRAGMENT TYPE: internal (xi) SEQUENCE DESCRIPTION: SEQ ID NO: 17: Cys Asp Leu He Tyr Tyr Asp Tyr Glu Glu Asp Tyr Tyr Phe Trp Gly 1 5 10 15 Cys Ser Gly Lys Leu He Cys Thr 20 (2) INFORMATION FOR SEQ ID NO: 18: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 24 amino acids (B) TYPE: amino acid (D) TOPOLOGY: linear (ii) MOLECULE TYPE: peptide (iii) HYPOTHETICAL: NO (v) FRAGMENT TYPE: internal (xi) SEQUENCE DESCRIPTION: SEQ ID NO: 18: Cys Asp Leu He Tyr Tyr Asp Tyr Glu Glu Asp Tyr Tyr Phe Cys Thr 1 5 10 15 Thr Ala Val Pro Trp Asn Ala Ser 20 (2) INFORMATION FOR SEQ ID NO: 19: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 25 amino acids (B) TYPE: amino acid (D) TOPOLOGY: linear (ii) MOLECULE TYPE: peptide (iii) HYPOTHETICAL: NO (v) FRAGMENT TYPE: internal (ix) FEATURE: (A) NAME/KEY: Modified-site (B) LOCATION: 15 (D) OTHER INFORMATION: /label= SEQIDN019 /note=- ""Lys in position 15 is substituted by SEQ ID NO 1"" (xi) SEQUENCE DESCRIPTION: SEQ ID NO: 19: Cys Asp Leu He Tyr Tyr Asp Tyr Glu Glu Asp Tyr Tyr Phe Lys Arg 1 5 10 15 Pro Pro Asn Ala Pro He Leu Ser Thr 20 25 (2) INFORMATION FOR SEQ ID NO: 20: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 13 amino acids (B) TYPE: amino acid (D) TOPOLOGY: linear (ii) MOLECULE TYPE: peptide (iii) HYPOTHETICAL: NO (v) FRAGMENT TYPE: internal (xi) SEQUENCE DESCRIPTION: SEQ ID NO: 20: Thr Tyr Ala Met Asn Pro Pro Asn Ala Pro He Leu Ser 1 5 10 (2) INFORMATION FOR SEQ ID NO: 21: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 27 amino acids (B) TYPE: amino acid (D) TOPOLOGY: linear (ii) MOLECULE TYPE: peptide (iii) HYPOTHETICAL: NO (v) FRAGMENT TYPE: internal (xi) SEQUENCE DESCRIPTION: SEQ ID NO: 21: Arg Val Arg Ser Lys Ser Phe Asn Tyr Ala Thr Tyr Tyr Ala Asp Ser 1 5 10 15 Val Lys Gly Pro Pro Asn Ala Pro He Leu Ser 20 25 (2) INFORMATION FOR SEQ ID NO: 22: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 22 amino acids (B) TYPE: amino acid (D) TOPOLOGY: linear (ii) MOLECULE TYPE: peptide (iii) HYPOTHETICAL: NO (v) FRAGMENT TYPE: internal (xi) SEQUENCE DESCRIPTION: SEQ ID NO: 22: Pro Ala Gin Gly He Tyr Phe Asp Tyr Gly Gly Phe Ala Tyr Pro Pro 1 5 10 15 Asn Ala Pro He Leu Ser 20 (2) INFORMATION FOR SEQ ID NO: 23: (i) SEQUENCE CHARACTERISTICS: (A) LENGTH: 24 amino acids (B) TYPE: amino acid (D) TOPOLOGY: linear (ii) MOLECULE TYPE: peptide (iii) HYPOTHETICAL: NO (v) FRAGMENT TYPE: internal (xi) SEQUENCE DESCRIPTION: SEQ ID NO: 23: Cys Asp Leu He Tyr Tyr Asp Tyr Glu Glu Asp Tyr Tyr Gin Arg Lys 1 5 10 15 Thr Lys Arg Asn Thr Asn Arg Arg 20

Claims: CLAIMS 1. Antigen/antibody specificity exchanger, characterised in that it comprises A) an amino-acid sequence corresponding to an amino-acid sequence of an antibody which specifically binds to a certain antigen, including hapten, B) linked by a link to C) an amino-acid sequence to which a certain antibody binds. 2. Antigen/antibody specificity exchanger according to claim 1, wherein said amino-acid sequence of A) corresponds to an amino-acid sequence of a comple¬ mentarity determining region (CDR) of a certain antibody. 3. Antigen/antibody specificity exchanger according to claim 1, wherein said amino-acid sequence of C) corresponds to an antibody-binding region of a certain protein. 4. Antigen/antibody specificity exchanger according to claim 1, wherein said amino-acid sequence of A) is linked to said amino-acid sequence of C) by a link B) , which is selected from the group consisting of a direct peptide bond and spacer molecules. 5. Antigen/antibody specificity exchanger according to claim 2, wherein said amino-acid sequence of A) is selected from SEQ ID NO: 1: Cys Asp Leu He Tyr Tyr Asp Tyr Glu Glu Asp Tyr Tyr Phe SEQ ID NO: 2: Cys Asp Leu He Tyr Tyr Asp Tyr Glu Glu Asp Tyr Tyr SEQ ID NO: 3 Thr Tyr Ala Met Asn SEQ ID NO: 4 Arg Val Arg Ser Lys Ser Phe Asn Tyr Ala Thr Tyr Tyr Ala Asp Ser Val Lys Gly and SEQ ID NO: 5 Arg Val Arg Ser Lys Ser Phe Asn Tyr Ala Thr Tyr Tyr Ala Asp Ser Val Lys Gly 6. Antigen/antibody specificity exchanger according to claim 3, wherein said certain protein is of viral, bacterial or fungal origin. 7. Antigen/antibody specificity exchanger according to claim 6, wherein said amino-acid sequence of C) is selected form the group consisting of SEQ ID NO: 6: Pro Pro Asn Ala Pro He Leu Ser SEQ ID NO: 7: Arg Pro Pro Asn Ala Pro He Leu Ser Thr SEQ ID NO: 8: Lys Glu He Pro Ala Leu Thr Ala Val Glu Thr Gly SEQ ID NO: 9: Pro Ala His Ser Lys Glu He Pro Ala Leu Thr Ala SEQ ID NO: 10: Trp Gly Cys Ser Gly Lys Leu He Cys Thr SEQ ID NO: 11: Cys Thr Thr Ala Val Pro Trp Asn Ala Ser and SEQ ID NO: 12: Gin Arg Lys Thr Lys Arg Asn Thr Asn Arg Arg. 8. Antigen/antibody specificity exchanger according to claim 1, wherein it is selected from the group consisting of Peptide 1: SEQ ID NO: 13 Cys Asp Leu He Tyr Tyr Asp Tyr Glu Glu Asp Tyr Tyr Phe Pro Pro Asn Ala Pro He Leu Ser Peptide 2: SEQ ID NO: 14 Cys Asp Leu He Tyr Tyr Asp Tyr Glu Glu Asp Tyr Tyr Phe Arg Pro Pro Asn Ala Pro He Leu Ser Thr Peptide 3: SEQ ID NO: 15 Cys Asp Leu He Tyr Tyr Asp Tyr Glu Glu Asp Tyr Tyr Phe Lys Glu He Pro Ala Leu Thr Ala Val Glu Thr Gly Peptide : SEQ ID NO: 16 Cys Asp Leu He Tyr Tyr Asp Tyr Glu Glu Asp Tyr Tyr Phe Pro Ala His Ser Lys Glu He Pro Ala Leu Thr Ala Peptide 5: SEQ ID NO: 17 Cys Asp Leu He Tyr Tyr Asp Tyr Glu Glu Asp Tyr Tyr Phe Trp Gly Cys Ser Gly Lys Leu He Cys Thr Peptide 6: SEQ ID NO: 18 Cys Asp Leu He Tyr Tyr Asp Tyr Glu Glu Asp Tyr Tyr Phe Cys Thr Thr Ala Val Pro Trp Asn Ala Ser Peptide 7: SEQ ID NO: 19 Cys Asp Leu He Tyr Tyr Asp Tyr Glu Glu Asp Tyr Tyr Phe LySTQrg Pro Pro Asn Ala Pro He Leu Ser Thr Cys Asp Leu He Tyr Tyr Asp Tyr Glu Glu Asp Tyr Tyr Phe Peptide 8: SEQ ID NO: 20 Thr Tyr Ala Met Asn Pro Pro Asn Ala Pro He Leu Ser Peptide 9: SEQ ID NO: 21 Arg Val Arg Ser Lys Ser Phe Asn Tyr Ala Thr Tyr Tyr Ala Asp Ser Val Lys Gly Pro Pro Asn Ala Pro He Leu Ser Peptide 10: SEQ ID NO: 22 Pro Ala Gin Gly He Tyr Phe Asp Tyr Gly Gly Phe Ala Tyr Pro Pro Asn Ala Pro He Leu Ser Peptide 11: SEQ ID NO: 23 Cys Asp Leu He Tyr Tyr Asp Tyr Glu Glu Asp Tyr Tyr Gin Arg Lys Thr Lys Arg Asn Thr Asn Arg Arg. 9. Antigen/antibody specificity exchanger according to claim 4, wherein said spacer molecules are selected from an amino acid, an amino acid having two amino groups, linear or branched peptides, polypeptides and biotin- avidin-biotin. 10. Diagnostic reagent comprising an antigen/antibody specificity exchanger according to any one of claims 1-9. 11. A method of treating a disease or disorder caused by a known antigen in an individual in need of an increased number of antigen-specific antibodies, which comprises administration to said individual of a sufficient amount of a tailor-made antigen/antibody specificity exchanger according to claim 1 which binds to certain antibodies known to exist in said individual.

Inventors: SAELLBERG MATTI, SAELLBERG, MATTI
Applicants: FERRING AB, SAELLBERG MATTI, SAELLBERG, MATTI
Application year: 1995
Main classification: C07K16
IPC codes: A61K38, C07K14, C07K16, C07K19