EP1616185A2 - Procede de criblage de conditions operatoires d une reaction chimique de couplage et trousses pour la mise en oeuvre de ce procede - Google Patents
Procede de criblage de conditions operatoires d une reaction chimique de couplage et trousses pour la mise en oeuvre de ce procedeInfo
- Publication number
- EP1616185A2 EP1616185A2 EP04758930A EP04758930A EP1616185A2 EP 1616185 A2 EP1616185 A2 EP 1616185A2 EP 04758930 A EP04758930 A EP 04758930A EP 04758930 A EP04758930 A EP 04758930A EP 1616185 A2 EP1616185 A2 EP 1616185A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- antibody
- compound
- reaction
- coupling
- group
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
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- 239000012965 benzophenone Substances 0.000 description 1
- GPRLTFBKWDERLU-UHFFFAOYSA-N bicyclo[2.2.2]octane Chemical compound C1CC2CCC1CC2 GPRLTFBKWDERLU-UHFFFAOYSA-N 0.000 description 1
- 235000020958 biotin Nutrition 0.000 description 1
- ZADPBFCGQRWHPN-UHFFFAOYSA-N boronic acid Chemical compound OBO ZADPBFCGQRWHPN-UHFFFAOYSA-N 0.000 description 1
- 229940098773 bovine serum albumin Drugs 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 238000007707 calorimetry Methods 0.000 description 1
- 150000001728 carbonyl compounds Chemical class 0.000 description 1
- 238000004587 chromatography analysis Methods 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- SBTSVTLGWRLWOD-UHFFFAOYSA-L copper(ii) triflate Chemical compound [Cu+2].[O-]S(=O)(=O)C(F)(F)F.[O-]S(=O)(=O)C(F)(F)F SBTSVTLGWRLWOD-UHFFFAOYSA-L 0.000 description 1
- 229960000956 coumarin Drugs 0.000 description 1
- 235000001671 coumarin Nutrition 0.000 description 1
- 238000006352 cycloaddition reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004925 denaturation Methods 0.000 description 1
- 230000036425 denaturation Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000012954 diazonium Substances 0.000 description 1
- 150000001989 diazonium salts Chemical class 0.000 description 1
- 150000001993 dienes Chemical class 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- BFMYDTVEBKDAKJ-UHFFFAOYSA-L disodium;(2',7'-dibromo-3',6'-dioxido-3-oxospiro[2-benzofuran-1,9'-xanthene]-4'-yl)mercury;hydrate Chemical compound O.[Na+].[Na+].O1C(=O)C2=CC=CC=C2C21C1=CC(Br)=C([O-])C([Hg])=C1OC1=C2C=C(Br)C([O-])=C1 BFMYDTVEBKDAKJ-UHFFFAOYSA-L 0.000 description 1
- 238000006911 enzymatic reaction Methods 0.000 description 1
- 125000004185 ester group Chemical group 0.000 description 1
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- MHMNJMPURVTYEJ-UHFFFAOYSA-N fluorescein-5-isothiocyanate Chemical compound O1C(=O)C2=CC(N=C=S)=CC=C2C21C1=CC=C(O)C=C1OC1=CC(O)=CC=C21 MHMNJMPURVTYEJ-UHFFFAOYSA-N 0.000 description 1
- 239000007850 fluorescent dye Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229940116332 glucose oxidase Drugs 0.000 description 1
- 235000019420 glucose oxidase Nutrition 0.000 description 1
- 150000004676 glycans Chemical class 0.000 description 1
- 150000004795 grignard reagents Chemical class 0.000 description 1
- 125000005842 heteroatom Chemical group 0.000 description 1
- 238000007210 heterogeneous catalysis Methods 0.000 description 1
- VPFMEXRVUOPYRG-UHFFFAOYSA-N hex-5-ynoic acid Chemical compound OC(=O)CCCC#C VPFMEXRVUOPYRG-UHFFFAOYSA-N 0.000 description 1
- 238000007172 homogeneous catalysis Methods 0.000 description 1
- 150000004678 hydrides Chemical class 0.000 description 1
- 238000005913 hydroamination reaction Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 230000008105 immune reaction Effects 0.000 description 1
- 229940127121 immunoconjugate Drugs 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 150000007529 inorganic bases Chemical class 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000007116 intermolecular coupling reaction Methods 0.000 description 1
- XMBWDFGMSWQBCA-YPZZEJLDSA-N iodane Chemical compound [125IH] XMBWDFGMSWQBCA-YPZZEJLDSA-N 0.000 description 1
- 229940044173 iodine-125 Drugs 0.000 description 1
- 150000002527 isonitriles Chemical class 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- HWYHZTIRURJOHG-UHFFFAOYSA-N luminol Chemical compound O=C1NNC(=O)C2=C1C(N)=CC=C2 HWYHZTIRURJOHG-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
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- 229910052987 metal hydride Inorganic materials 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 235000010755 mineral Nutrition 0.000 description 1
- 125000004108 n-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- YCWSUKQGVSGXJO-NTUHNPAUSA-N nifuroxazide Chemical group C1=CC(O)=CC=C1C(=O)N\N=C\C1=CC=C([N+]([O-])=O)O1 YCWSUKQGVSGXJO-NTUHNPAUSA-N 0.000 description 1
- MGFYIUFZLHCRTH-UHFFFAOYSA-N nitrilotriacetic acid Chemical compound OC(=O)CN(CC(O)=O)CC(O)=O MGFYIUFZLHCRTH-UHFFFAOYSA-N 0.000 description 1
- 150000002828 nitro derivatives Chemical class 0.000 description 1
- 229920001220 nitrocellulos Polymers 0.000 description 1
- 230000000269 nucleophilic effect Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 210000003463 organelle Anatomy 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 150000002902 organometallic compounds Chemical class 0.000 description 1
- 150000001282 organosilanes Chemical class 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920002704 polyhistidine Polymers 0.000 description 1
- 239000002685 polymerization catalyst Substances 0.000 description 1
- 239000000256 polyoxyethylene sorbitan monolaurate Substances 0.000 description 1
- 235000010486 polyoxyethylene sorbitan monolaurate Nutrition 0.000 description 1
- 229920001282 polysaccharide Polymers 0.000 description 1
- 239000005017 polysaccharide Substances 0.000 description 1
- 229920000136 polysorbate Polymers 0.000 description 1
- 229920005990 polystyrene resin Polymers 0.000 description 1
- 229910000027 potassium carbonate Inorganic materials 0.000 description 1
- 235000003270 potassium fluoride Nutrition 0.000 description 1
- 150000003141 primary amines Chemical class 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 238000011403 purification operation Methods 0.000 description 1
- 229940079877 pyrogallol Drugs 0.000 description 1
- PYWVYCXTNDRMGF-UHFFFAOYSA-N rhodamine B Chemical compound [Cl-].C=12C=CC(=[N+](CC)CC)C=C2OC2=CC(N(CC)CC)=CC=C2C=1C1=CC=CC=C1C(O)=O PYWVYCXTNDRMGF-UHFFFAOYSA-N 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 229930195734 saturated hydrocarbon Natural products 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 125000003808 silyl group Chemical group [H][Si]([H])([H])[*] 0.000 description 1
- 150000003384 small molecules Chemical class 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- UIIMBOGNXHQVGW-UHFFFAOYSA-N sodium;hydron;carbonate Chemical compound [Na+].OC(O)=O UIIMBOGNXHQVGW-UHFFFAOYSA-N 0.000 description 1
- 238000002798 spectrophotometry method Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- JJAHTWIKCUJRDK-UHFFFAOYSA-N succinimidyl 4-(N-maleimidomethyl)cyclohexane-1-carboxylate Chemical compound C1CC(CN2C(C=CC2=O)=O)CCC1C(=O)ON1C(=O)CCC1=O JJAHTWIKCUJRDK-UHFFFAOYSA-N 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 125000000383 tetramethylene group Chemical group [H]C([H])([*:1])C([H])([H])C([H])([H])C([H])([H])[*:2] 0.000 description 1
- WROMPOXWARCANT-UHFFFAOYSA-N tfa trifluoroacetic acid Chemical compound OC(=O)C(F)(F)F.OC(=O)C(F)(F)F WROMPOXWARCANT-UHFFFAOYSA-N 0.000 description 1
- 238000002076 thermal analysis method Methods 0.000 description 1
- 238000001931 thermography Methods 0.000 description 1
- 150000007970 thio esters Chemical class 0.000 description 1
- 210000001519 tissue Anatomy 0.000 description 1
- 229910052722 tritium Inorganic materials 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
- G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
- G01N33/53—Immunoassay; Biospecific binding assay; Materials therefor
- G01N33/543—Immunoassay; Biospecific binding assay; Materials therefor with an insoluble carrier for immobilising immunochemicals
- G01N33/54306—Solid-phase reaction mechanisms
Definitions
- the present invention relates to a process for screening the operating conditions of a chemical coupling reaction, as well as to kits suitable for allowing the implementation of this process.
- the method can be used to screen substances, such as catalysts or solvents, which one wishes to know if they are likely to be useful in a particular coupling reaction, but it can also be used to screen levels, for example temperature or pressure, concentrations, stoichiometric ratios or times such as the reaction time or the duration of stirring of the reaction medium, the influence of which on the yield of a coupling reaction is desired.
- the method according to the invention is therefore likely to find numerous applications in the field of research, both fundamental and applied. Thus, for example, it can be used in fundamental studies aimed at a better understanding of the mechanisms of homogeneous or heterogeneous catalysis, whether it be chemical or biological.
- it can be used to screen a library of mutated enzymes in order to improve the catalytic performance of a "wild" enzyme, or to screen biological media of known or unknown composition in order to identify the existence of a particular catalytic activity in these media.
- the first compound is an aryl halide which is attached to a crosslinked polystyrene resin (Wang resin), while the second compound is an acrylate labeled with coumarin.
- Wang resin crosslinked polystyrene resin
- This latter type of process has two major drawbacks.
- the catalysis is carried out in a heterogeneous medium.
- a catalyst which exhibits a high catalytic activity in a heterogeneous medium can perfectly prove to be ineffective in a homogeneous medium.
- the assessment of the catalysis is essentially qualitative, insofar as it is difficult to calculate the yield of the coupling reaction since this calculation would require knowing the grafting rate of the first compound on the solid support.
- Yet another type of process is based on the fact that in the presence of an effective catalyst, the release of heat from a reaction takes place more quickly than in the presence of an ineffective catalyst.
- it is possible to assess the efficiency of catalysts by measuring the temperature variation of the reaction media, either by calorimetry or by thermography by means of ultra-sensitive infrared cameras fixed above said reaction media.
- An example of implementation of this type of process is illustrated in the publication by Blackmond et al. (Organic Process Research & Development, 1999, 3_ (4), 275-280, [5]) for the screening of catalysts useful in the Heck reaction.
- the screening methods by thermal analysis have the defect of requiring heavy and expensive equipment. Furthermore, they do not allow a calculation of the reaction yield. Finally, they are not applicable to reactions which take place slowly and which, consequently, give off quantities of heat which are not detectable or sufficiently significant.
- the present invention responds precisely to this need by providing a process for screening the operating conditions of a coupling reaction of at least two functional groups, which comprises the following steps: i) reacting together at least two compounds:
- the coupling reaction the operating conditions of which are to be screened and which involves at least two functional groups, in this case Gi and G 2 , is carried out using as reagents, at at least two compounds which each have, at one end, one of these functional groups and, at the other end, the rest of a molecule, respectively Mi and M 2 , for which there is a specific antibody, respectively ACi and AC 2 , or, in the case of the second compound, a group capable of forming one or more covalent bonds with the antibody ACi specific for the molecule Mi in the presence of a coupling agent.
- the concentration of the reaction medium in compound Z produced by the coupling reaction can / 092729
- telomere binding molecule telomere binding molecule
- Gi and G 2 correspond to the two functional groups which are at least engaged in the coupling reaction whose operating conditions are to be screened and are therefore chosen according to this reaction.
- Coupling reactions involving two functional groups and for which the method according to the invention can be used are in particular the following intermolecular coupling reactions:
- R-COOH or a carboxylic acid derivative such as, for example, an acid halide (R-CO-Hal), and an alcohol (R'-OH) to obtain an ester group (R-C0 2 R ');
- Aldolization reactions such as those which consist in coupling two aldehydes (R-CHO) or two ketones (R-CO-R '), or in coupling an aldehyde and a ketone to obtain an aldol or a ketol, and their variants such as the nitro-aldolization reaction in which an aldehyde is coupled to a nitro compound (R ' ⁇ CH 2 -N0 2 ) to obtain a nitro-alcohol (R-CH (OH) -CH (N0 2 ) - R ');
- Stille reaction which consists in coupling an organostannic compound (for example, Ar-SnBu 3 ) and an organic halide (for example, Ar'-Br), and its variants;
- organostannic compound for example, Ar-SnBu 3
- organic halide for example, Ar'-Br
- Coupling reactions involving three functional groups are in particular the Mannich reaction which consists in coupling a compound having an active hydrogen with a non-enolizable aldehyde and a primary or secondary amine to obtain an aminomethylated compound, the Hantzsch reaction which consists in coupling a amine with an aldehyde and an oc-bromo ketone to obtain a pyrrole, and the reaction of Bossio et al.
- Ei represents the rest of a molecule Mi for which there is a first specific antibody ACi
- E 2 can represent the rest of a molecule M 2 for which has a second specific antibody AC2.
- the molecules Mi and M are preferably haptens, that is to say small molecules which, after grafting on a vector such as a protein (bovine serum albumin, ⁇ -immunoglobulin, .. .) or a polysaccharide, are capable of inducing in animals the production of antibodies specifically directed against them.
- a protein bovine serum albumin, ⁇ -immunoglobulin, .. .
- a polysaccharide are capable of inducing in animals the production of antibodies specifically directed against them.
- haptens can in particular be hydrocarbons such as naphthalene, anthracene, phenanthrene, bicyclo [2.2.2] octane, bicyclo- [2.2.2] heptane, 2, 2-dimethyl-3-methyl-4, 4-dimethylpentane, adamantane, perhydrophenalene and racene perhydroant, substituted by a reactive function, preferably carboxylic acid, ine or thiol, suitable for allowing, on the one hand, to graft them onto the vector and, on the other hand, to link them to the functional groups Gi and G 2 or to the spacer groups in the case where Xi and X 2 represent such groups.
- hydrocarbons such as naphthalene, anthracene, phenanthrene, bicyclo [2.2.2] octane, bicyclo- [2.2.2] heptane, 2, 2-dimethyl-3-methyl-4, 4-dimethylpentane,
- these hydrocarbons have the advantage of being relatively inert chemically.
- these haptens can also be molecules other than hydrocarbons, in which case if, in the compounds E 1 -X 1 -G 1 and E 2 -X 2 --G 2 , the residues of these molecules contain one or more functional groups free capable of reacting to the operating conditions under which the coupling reaction is carried out, this or these functional groups should be protected by a suitably chosen protective group before carrying out the coupling reaction, that is to say prior to step i) of the process, then deprotected between steps i) and ii).
- Ei in the compound Ei-Xi-Gi or E 2 in the compound E2-X2-G2 does it correspond to formula (III) below:
- R 1 represents a hydrogen atom or a group protecting a amino function such as, for example, a tert-butyloxycarboxyl group (BOC) or a benzyl group.
- Ei in the compound E 1 -X1-G 1 or E 2 in the compound E 2 -X 2 -G 2 corresponds to formula (IV) below:
- R 2 represents a hydrogen atom or a group protecting an alcohol function such as, for example, a silyl group of the dimethyl tert-butylsilyl type, dihydropyran or also a benzyl, allyl or acetal group.
- E 2 may not represent the remainder of a molecule M2, but a group capable of forming at least one covalent bond with the antibody ACi in the presence of a coupling agent, in which case this group is advantageously chosen from amine, carboxylic acid, aldehyde, thiol, phenol, alkenyl, azide groups and photoactivatable groups such as, for example, benzophenone and arylazide groups.
- E2 is an amino or thiol group.
- Ei and E 2 can be linked to the functional groups Gi and G 2 , either directly or via spacer groups.
- These spacer groups which have the sole function of forming a bridge between, on the one hand, Ei and the functional group Gi and, on the other hand, between E 2 and the functional group G 2 , are either groups devoid of any functional group such as saturated hydrocarbon groups of the ethylene (- (CH 2 ) 2 -), propylene (- (CH 2 ) type 3 -), butylene (- (CH 2 ) 4 ⁇ ) or the like, either groups comprising one or more functional groups incapable of reacting to the operating conditions under which the coupling reaction is carried out, or even groups comprising one or more groups which are protected, prior to carrying out the coupling reaction, by an appropriate protective group.
- said at least one immunological assay for compound Z is preferably a solid phase assay for reasons of simplicity of implementation.
- step ii) comprises the following steps: ai) bringing the reaction medium obtained at reaction time t into contact with a solid phase on which the antibody ACi is immobilized , to obtain the binding of compound Z on this solid phase by immunological bonding between this antibody and the residue Ei of this compound; bi) bringing the solid phase into contact with a conjugate comprising the antibody AC2 coupled to a marker, in order to obtain the binding of this conjugate on this solid phase by immunological bonding between this antibody and the residue E 2 of compound Z attached to said solid phase; ci) measuring the amount of conjugate attached to the solid phase using the marker coupled to the antibody AC 2 ; and di) determining over a calibration range the concentration of compound Z of the reaction medium at said time
- This assay therefore uses the two antibodies ACi and AC 2 , the antibody ACi being immobilized on the solid phase and the antibody AC2 being coupled to a marker.
- step ii) comprises the steps following: a2) bringing the reaction medium obtained at reaction time t into contact with a solid phase on which the antibody ACi is immobilized, in order to obtain the fixing of compound Z on this solid phase by immunological bonding between this antibody and the remainder Ei of this compound; b 2 ) reacting a coupling agent with the antibody ACi immobilized on the solid phase and the group E2 of compound Z fixed on this solid phase, to obtain the formation of one or more covalent bonds between this antibody and this group; c 2 ) denaturing the immunological bond existing between the ACi antibody im
- This assay only uses the ACi antibody but in two different forms: a first form in which it is immobilized on the solid phase and a second form in which it is coupled to a marker.
- the coupling agent that is used in step b 2 ) can be a chemical reagent, in which case it should be bifunctional, that is to say that it comprises a first functional group capable of react with the E 2 group of the compound E 2 -X 2 -G 2 , and a second functional group, identical or different from the first, capable of reacting with the antibody ACi.
- these functional groups may be a homo-bifunctional reagent such as glutaraldehyde, difluoro-dinitrobenzene, bis (maleimido) hexane or disuccinimidyl suberate, or a hetero reagent bifunctional such as N-succinimidyl-3-3- (2-pyridyl-dithio) propionate or succinimidyl-4- (N-maleimidomethyl) -cyclohexane-1-carboxylate.
- glutaraldehyde difluoro-dinitrobenzene
- bis (maleimido) hexane or disuccinimidyl suberate or a hetero reagent bifunctional such as N-succinimidyl-3-3- (2-pyridyl-dithio) propionate or succinimidyl-4- (N-maleimidomethyl) -cyclohexane-1-carboxylate.
- glutaraldehyde or disuccinimidyl suberate are used.
- the coupling agent can be irradiation, for example ultraviolet, in the case where E 2 represents a photoactivatable group.
- step c 2 the denaturation of the immunological bond existing between the antibody ACi and the remainder Ei of compound Z can be carried out in conventional manner using an appropriate reagent, or alternatively under the action of ultrasound. or heat.
- This reagent can be chosen from acids such as HCl, bases such as NaOH, organic solvents such as, for example, alcohols of the methanol type, surfactants and mineral salts.
- acids such as HCl
- bases such as NaOH
- organic solvents such as, for example, alcohols of the methanol type
- surfactants and mineral salts can be chosen from acids such as HCl, bases such as NaOH, organic solvents such as, for example, alcohols of the methanol type, surfactants and mineral salts.
- the ACi antibody and, where appropriate, the AC2 antibody can be polyclonal or monoclonal antibodies, even if, in general, it is preferred to use monoclonal antibodies because of their greater specificity;
- the immobilization of the antibody ACi on the solid phase can be a passive or active immobilization; thus, this immobilization can be obtained by simple adsorption of said antibody on the surface of the solid phase, by covalent bond, by means of binding molecules such as the avidin-biotin system, or also by means of a polyhistidine tag.
- the solid phase can be any of the solid phases conventionally used for immunological assays such as the wall of a tube or of a well of a microtitration plate, a membrane made of a plastic material such as polystyrene or nitrocellulose, glass beads, magnetic beads and, in general, any surface on which it is possible to fix, passively or actively, an antibody; and
- the marker can be an isotope like iodine 125, chromium 51 or tritium, an enzyme like horseradish peroxidase, phosphatase alkaline, acetylcholine esterase or glucose oxidase, a luminescent marker such as pyrogallol, luminol or isoluminol, a fluorescent marker such as fluoroscéine, fluorescein isothiocyanate, rhodamine or cyanine, or a substance capable of react with avidin or streptavidin such as biotin and its structural analogs; in the latter case, avidin or streptavidin is itself labeled, for example by an enzyme or a fluorochrome.
- an enzyme like horseradish peroxidase, phosphatase alkaline, acetylcholine esterase or glucose oxidase
- a luminescent marker such as pyrogallol, luminol or isoluminol
- the ACi antibody and, where appropriate, the AC 2 antibody are monoclonal antibodies;
- the solid phase is the wall of a well of a microtiter plate;
- the immobilization of the antibody ACi is carried out by passive adsorption of this antibody on the surface of this phase and the marker is an enzyme, in particular acetylcholine esterase, due to its "turn-over" (16,000 molecules of substrate hydrolyzed per second and per site) which gives the conjugates which contain it a high specific activity.
- the process advantageously comprises an operation for diluting the reaction medium between steps i) and ii).
- the effects of the candidate operating condition (s) on the coupling reaction are preferably evaluated in step iii) by determining the yield of this reaction from the concentration of compound Z in the reaction medium as determined. in step ii).
- This yield can, for example, be calculated by applying the following formula:
- the coupling reaction can consist in coupling two or more of two functional groups, the number of functional groups involved in this reaction being preferably equal to 2, 3 or 4.
- step i) the compounds of formulas E1-X1-G1 and E 2 -X 2 -G 2 are reacted together to obtain the formation in the reaction medium of a compound Z which corresponds to the formula E1- X1-G1-G2-X2-E2 in which Xi, X 2 , Ei and E 2 have the same meaning as above and G1-G2 represents the group of atoms resulting from the coupling between said functional groups Gi and G2; while
- step ii) the concentration of compound Z of the reaction medium is determined by a single immunoassay, which is preferably a solid phase assay of the "sandwich” type or of the "SPIE-IA” type as previously described.
- step i) the compounds of formulas E1-X 1 -G 1 and E 2 -X 2 -G 2 are reacted with a third compound of formula E 3 -X 3 -G 3 in which X 3 represents a covalent bond or a third spacer group, identical or different from Xi and / or X 2 , while E 3 represents either the remainder of a third molecule M 3 different from Mi and M 2 and for which we have d a third specific AC 3 antibody, ie a group capable of forming a covalent bond with the ACi antibody in the presence of a coupling agent provided, however, that E 2 does not already represent such a group, in order to obtain the formation in the reaction medium of a compound Z corresponding to one of the formulas below:
- step ii) the concentration of compound Z of the reaction medium is determined by two different immunoassays.
- the first and second markers may be identical in the case where the two assays are carried out in parallel, but must be different in the case where they are carried out one after the other.
- the first assay can be an assay of the "SPIE-IA" type which is carried out using the antibody ACi as previously described, in which case the second assay is an assay of the "sandwich” type which is carried out using the antibody AC2 or the antibody AC 3 coupled to a marker depending on whether, in the compounds E2-X2-G2 and E 3 -X 3 -G 3 , it is E 2 or E 3 which represents the suitable group to form one or more covalent bonds with the antibody ACi during the “SPIE-IA” assay. In all cases, the formation of the compound
- step i) the compounds of formula E1-X1-G1 and E2-X2-G2 are reacted with a third compound of formula E 3 -X 3 -G 3 as defined above and a fourth compound of formula E4-X4-G4 in which X represents a covalent bond or a fourth spacer group, identical or different from Xi, X 2 and / or X 3 , while E4 represents either the remainder of a third molecule M 4 different from Mi, of M 2 and M 3 and for which there is a fourth specific AC 4 antibody, ie a group capable of forming a bond covalent with the antibody ACi in the presence of a coupling agent on the condition, however, that E 2 and E 3 do not already represent such a group, in order to obtain the formation in the reaction medium of a compound Z corresponding to one the following formulas:
- step ii) the concentration of compound Z in the reaction medium is determined by three different immunoassays.
- these assays can be carried out in parallel or one after the other and are preferably all three carried out in solid phase. It can be three dosages of the “sandwich” type or a dosage of the “SPIE-IA” type followed by two dosages of the “sandwich” type, the formation of compound Z in the reaction medium being, here again, guaranteed. by the agreement of the results obtained.
- the candidate operating conditions are preferably chosen from the group consisting of solvents, catalysts, temperature levels, pressure levels, the use of ultrasound, concentrations
- the method according to the invention can also be used to screen operating conditions of a single type such as, for example, catalysts or temperature levels or pressure levels, only to screen combinations of different types of operating conditions such as solvent / catalyst, solvent / catalyst / reaction time, temperature / pressure, catalyst / temperature / pressure, or the like.
- the term "catalyst” means any agent which, by its mere presence within the reaction medium, is capable of accelerating the kinetics of a reaction.
- This catalyst can also be a chemical catalyst such as, for example, an organic compound, an inorganic base, a metal, a metal salt, a metal oxide or hydride, an organometallic compound, a metal-ligand complex, a halide, or alternatively a combination of these, ..., that a biological catalyst, the latter being able to appear in very diverse forms, and in particular in the form of an organ, a tissue, a cell, a cell fraction, a cell organelle, an enzyme extract, a molecular complex or even a single molecule, for example an isolated and purified enzyme.
- the method according to the invention has many advantages. Indeed: - it allows, as soon as there is at least one molecule capable of being grafted onto a functional group, either directly or via a spacer group, and at least one antibody capable of specifically recognizing and binding this molecule, of measuring the compound resulting from the coupling of two functional groups and this, whatever these; therefore, it suffices to have a few graftable molecules and a few antibodies specific for these molecules to be able to screen the operating conditions of very many coupling reactions by the method according to the invention;
- the method according to the invention is therefore particularly well suited to carrying out "high throughput" screens.
- the subject of the invention is also a kit or "kit” for the implementation of a method for screening the operating conditions of a coupling reaction of at least two functional groups, which comprises appropriate amounts:
- a marker development reagent for example a substrate if the marker is an enzyme
- the subject of the invention is also a kit or "kit” for the implementation of a process for screening the operating conditions of a coupling reaction of at least two functional groups, which comprises appropriate amounts:
- this antibody being said antibody specific for the Mi molecule
- the invention further relates to the use of a screening method or a kit as defined above for the screening, in particular at "high throughput", of catalysts useful in a coupling reaction between two functional groups.
- the invention also comprises other provisions which Will emerge from the additional description which follows, which relates to examples of methods of implementing the method according to the invention which have made it possible to validate both its feasibility and its advantage for screening at "high speed" operating conditions.
- FIG. 1 represents, in a schematic form, the different stages of a first mode of implementation of the screening method according to the invention.
- FIG. 2 shows the results, in terms of reaction yields, expressed in%, of a screening of operating conditions carried out in accordance with the first embodiment of the method according to the invention illustrated in FIG. 1.
- FIG. 3 represents, in a schematic form, the different stages of a second mode of implementation of the method according to the invention.
- FIG. 4 shows the results, in terms of reaction yields, expressed in%, of a screening of operating conditions carried out in accordance with the second embodiment of the method according to the invention illustrated in FIG. 3.
- the present example illustrates a first mode of implementation of the method according to the invention in which:
- the screening relates to three types of operating conditions taken in combination, namely the type of solvent, the type of catalyst and the reaction time; and - the concentration of compound Z of the reaction media is determined by an ELISA assay in solid phase of the "sandwich" type.
- Gi and E2-X 2 - 2 is carried out using: - two candidate solvents: tetra-ydro-furan (THF) and methylene chloride (CH2CI 2 );
- TBAF tetrabutylammonium fluoride
- KF triethylamine
- TAA triethylamine
- PYR pyridine
- DIA di-isopropylamine
- DVBCO diazabicyclo octane
- DIEA diisopropylethylamine
- DBU diazabicyclo undecene
- DMAP dimethylaminopyridine
- NaOMe sodium methoxide
- NaOH soda
- K 2 C0 3 potassium carbonate
- a conjugate comprising a monoclonal antibody directed against homovanillic acid (antibody H6-92; Kd: 10 "7 M), coupled to acetylcholine esterase (AChE), this conjugate being prepared and stored as described by Taran et al. in Clin Chem., 1997, 43 (2), 363-368 [8]; and
- the development reagent which comprises a mixture of 7.5.10 "4 M acetylthiocholine iodide and 5.5 'dithiobis- (2-nitro) benzoic acid (Ellman's reagent) 2.5.10 " 4 M in 0.1 M phosphate buffer (pH 7.4), to measure the amount of H6-92 / AChE antibody conjugate attached to the solid phase.
- the adsorption of the His-31 antibody on the surface of the walls of the wells of the microtitration plates was obtained by depositing 100 ⁇ l of a solution of this antibody at 5 ⁇ l / ml in 0.05 M phosphate buffer, ( pH 7.4) in each of these wells and leaving the plates for 18 hours at room temperature.
- microtiter plates are placed in an incubator shaker, at a temperature of 40 ° C., and are maintained there for the desired reaction time. * Stopping the coupling and deprotection reaction (step B of Figure 1):
- the coupling reaction is stopped and the protective groups are removed by adding 125 ⁇ l of pure trifluoroacetic acid (TFA) to the wells.
- TFA trifluoroacetic acid
- Each reaction medium is diluted by taking 10 ⁇ l of this medium and adding it to 1 ml of EIA buffer (0.1 M phosphate buffer; 0.15 M NaCl; BSA
- the plate is stirred for 1 hour at room temperature, then washed 5 times with a washing buffer consisting of a 0.01 M phosphate buffer, pH
- an Ellman unit being defined as the amount of enzyme capable of producing an increase in absorbance of one unit for one minute in one ml of Ellman reagent, for an optical path of one cm at 25 ° C (step F of Figure 1).
- the plate is stirred for 3 hours at room temperature, then washed 5 times with the washing buffer (step G of FIG. 1).
- FIG. 2 shows, for example, that when the nitro-aldolization reaction is carried out for 4 hours in THF, only diazabicyclo octane (DABCO) and dimethylaminopyridine (DMAP) make it possible to obtain a reaction yield greater than 50%, whereas, when carried out for the same time in CH 2 C1 2 , such a yield is only obtained in the presence of tetra-butylammonium fluoride (TBAF).
- DABCO diazabicyclo octane
- DMAP dimethylaminopyridine
- the screening relates to two types of operating conditions taken in combination, namely the type of solvent and the type of catalyst; and
- the concentration of compound Z of the reaction media is determined by an immunoenzymatic assay in solid phase of the "SPIE-IA" type.
- the compound E 1 -X 1 -G 1 corresponds to the formula (VII) below:
- R is an ethyl group and R 'is a methyl group (L21); R and R 'are t-butyl groups (L22); R and R 'are 2, 6-diisopropylbenzene groups;
- the method is implemented according to the following operating mode.
- polypropylene microtiter plates are successively deposited in each of the wells (equal capacity: 300 ⁇ l / well) and under an inert atmosphere:
- the plates are placed in an incubator shaker, at a temperature of 25 ° C., and are kept there for 24 hours.
- the coupling reaction is stopped and the BOC groups are removed by adding 40 ⁇ l of pure TFA to each well.
- the plates are stirred for 1 hour at room temperature.
- reaction medium is diluted by taking 10 ⁇ l of this medium and adding it to 1 ml of EIA buffer contained in a well of a deep-weel plate (capacity: 2 ml / well).
- 100 ⁇ l of each diluted reaction medium are deposited in a well of a microtitration plate, the wall of the wells of which has been previously coated with the His-76 antibody.
- washing buffer consisting of a 0.01 M phosphate buffer, pH
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| FR0350106A FR2853965B1 (fr) | 2003-04-15 | 2003-04-15 | Procede de criblage de conditions operatoires d'une reaction chimique de couplage et trousses pour la mise en oeuvre de ce procede |
| PCT/FR2004/050158 WO2004092729A2 (fr) | 2003-04-15 | 2004-04-13 | Procede de criblage de conditions operatoires d'une reaction chimique de couplage et trousses pour la mise en oeuvre de ce procede |
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| US (1) | US20070172905A1 (fr) |
| EP (1) | EP1616185A2 (fr) |
| JP (1) | JP2007527367A (fr) |
| CA (1) | CA2522432A1 (fr) |
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| US9060847B2 (en) * | 2008-05-19 | 2015-06-23 | University Of Rochester | Optical hydrogel material with photosensitizer and method for modifying the refractive index |
| US9090542B2 (en) | 2009-11-11 | 2015-07-28 | University Of Georgia Research Foundation, Inc. | Methods for labeling a substrate using a hetero-diels-alder reaction |
| US20110108411A1 (en) * | 2009-11-11 | 2011-05-12 | Popik Vladimir V | Methods for labeling a substrate using a hetero-diels-alder reaction |
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- 2004-04-13 US US10/551,929 patent/US20070172905A1/en not_active Abandoned
- 2004-04-13 CA CA002522432A patent/CA2522432A1/fr not_active Abandoned
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- 2004-04-13 JP JP2006505875A patent/JP2007527367A/ja active Pending
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| Publication number | Publication date |
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| WO2004092729A2 (fr) | 2004-10-28 |
| US20070172905A1 (en) | 2007-07-26 |
| JP2007527367A (ja) | 2007-09-27 |
| FR2853965B1 (fr) | 2006-09-15 |
| CA2522432A1 (fr) | 2004-10-28 |
| FR2853965A1 (fr) | 2004-10-22 |
| WO2004092729A3 (fr) | 2005-02-24 |
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