EP4100745A1 - Procede de capture et d'identification d'agglutinats cellulaires pour la detection d'anticorps anti-erythrocytaires multiplexe - Google Patents
Procede de capture et d'identification d'agglutinats cellulaires pour la detection d'anticorps anti-erythrocytaires multiplexeInfo
- Publication number
- EP4100745A1 EP4100745A1 EP21704212.6A EP21704212A EP4100745A1 EP 4100745 A1 EP4100745 A1 EP 4100745A1 EP 21704212 A EP21704212 A EP 21704212A EP 4100745 A1 EP4100745 A1 EP 4100745A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- antibodies
- solid support
- erythrocyte
- detection method
- sample
- 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.)
- Pending
Links
Classifications
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- 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
- G01N33/80—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing involving blood groups or blood types or red blood cells
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- 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
- G01N33/577—Immunoassay; Biospecific binding assay; Materials therefor involving monoclonal antibodies binding reaction mechanisms characterised by the use of monoclonal antibodies
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2400/00—Assays, e.g. immunoassays or enzyme assays, involving carbohydrates
- G01N2400/10—Polysaccharides, i.e. having more than five saccharide radicals attached to each other by glycosidic linkages; Derivatives thereof, e.g. ethers, esters
Definitions
- the present invention relates to the field of in vitro detection and diagnostic methods using in particular samples of biological origin.
- the methods more particularly concerned relate to the detection of anti-erythrocyte antibodies participating in the determination of the blood group.
- the detection of anti-erythrocyte antibodies in biological samples remains of paramount importance, in particular in immunohaematology, in the field of blood transfusion, and in particular for the determination of blood groups or the assessment of the risk in the recipient.
- anti-erythrocyte antibodies encompasses, in clinical practice, a large number of so-called regular or irregular antibodies, generally directed against antigenic patterns expressed on the surface of erythrocyte cells.
- the antigens linked to the ABO blood group are oligosaccharide units.
- the purpose of grouping AB O is thus to determine four blood groups according to the presence or absence of two antigens, A and B, on the surface of red blood cells. Each individual is alternately from group A if he has motif A, from group B if he has motif B, from group AB if he has motifs A and B, from group O if he has neither of the 2 reasons A or B.
- each patient has in his serum or plasma the antibody (s) corresponding to the antigens that he does not have (so-called “Landsteiner” law).
- a group A subject carrying the A antigen has anti-B antibodies.
- Subject B carrying the B antigen has anti-A antibodies.
- An AB subject carrying the A and B antigens does not have anti-A or anti-B antibodies.
- a group O subject carrying no A or B antigens has anti-A and anti-B antibodies.
- - a globular test known as Beth-Vincent, consisting in looking for antigens A (ABOI) and B (AB02) with the following monoclonal reagents: anti-A (anti-ABOl), anti-B (anti-AB02) and anti -AB (anti-AB03);
- a plasma test called Simonin or Simonin-Michon, consisting of looking for anti-A and anti-B antibodies with the A1 and B test red blood cells, at least one of these red blood cells must be of the Rhesus phenotype (RH) negative.
- RH Rhesus phenotype
- anti-erythrocyte antibodies are also involved in transfusion safety, they recognize: Rhesus, Kell, MNS, P, Lutheran, Lewis, Duffy, Kidd, Diégo, Cartwright, Xg, Scianna, Dombrock, Colton, Landsteiner-Wiener, Chido / Rodgers, Hh, Kx, Gerbich, Cramer, Knops, Indian, OK, RAPH, John Milton Hagen, Li, Globoside, GIL, Rh-associated glycoprotein, Forssmann, JR, LAN, VEL, CD59.
- an individual's serum may contain antibodies directed against one or more of the antigens listed above. These antibodies appear during antigenic stimulation by foreign red blood cells, for example following immunization against one or more antigens during a blood transfusion or even during pregnancy by a maternal immune reaction directed against the antigens. Fetal erythrocytes not belonging to the maternal group, especially during childbirth. These so-called irregular (or immune) antibodies are most often of the IgG isotype.
- RAI Irregular Agglutinins
- TIA Indirect anti-globulin test
- the objective will be to assign the patients the red blood cells with the best compatibility.
- the search for anti-erythrocyte antibodies in immunohaematology is based on the agglutination of test red blood cells whose phenotype is known. There are a large number of variations of these techniques. They can be manual, on an opaline plate, in a tube or microplate well, in a gel column, or fully automated.
- WO85 / 01354 and WO02 / 16942 teach a method of detecting antibodies in blood, comprising a step of adsorbing an antigen onto a solid surface.
- EP0223978A1 teaches a device for determining a blood group, consisting of a solid substrate, and one or more antibodies reactive with erythrocyte antigenic determinants.
- US2007077605 teaches an optical device of the bio-disc type, suitable for determining a blood group.
- WO2007 / 051844A1 and WO2008148886A1 teach devices or methods for identifying anti-erythrocyte antibodies in a sample, comprising contacting groups of beads, or particles.
- WO2009007649A1 teaches a device for determining a blood group, comprising a support including a reactive zone consisting of a porous membrane and an absorbent membrane.
- WO2012010666 teaches a method of detecting anti-erythrocyte antibodies, comprising contacting a sample with magnetic particles carrying said erythrocytes.
- WO2019158726A1 teaches a detection device, consisting of a support and a hydrophobic porous membrane comprising beads complexed with an antibody or antigen.
- the invention aims precisely to meet all of these needs.
- the inventors propose to take advantage of the fact that antibody biochips can be used as a system for sorting agglutinated cells.
- the originality of this approach is based on the fact that the capture, on antibody deposits, of agglutinated cells, is capable of producing a more intense signal and of different morphology than that generated by non-agglutinated cells.
- the inventors were able to determine the cellular phenotypes involved in the agglutination and therefore the nature of the antibody initially present in the test sample.
- This technology can be advantageously implemented in the context of the search for regular anti-erythrocyte antibodies such as anti-ABO group antibodies, or irregular ones.
- This application is of particular interest for carrying out the indirect plasma test or Simonin test and carrying out a Research for Irregular Agglutinins (RAI).
- RAI Irregular Agglutinins
- Such multiplexed applications may include or consist, in particular, of the detection of: several types of anti-erythrocyte antibodies in a sample; of several types of anti-red blood cell antibodies in several samples.
- these applications can therefore allow the simultaneous detection of several parameters, in one or more samples.
- the present invention relates to an in vitro method for detecting anti-erythrocyte antibodies in a sample, comprising at least the following steps: a) bringing said sample into contact with one or more erythrocyte (s) test (s) or suspension of erythrocyte (s) test (s) of known phenotype, under conditions liable to induce haemagglutination, so as to obtain a reaction mixture; b) contacting said reaction mixture with a solid support containing a plurality of delimited adsorption zones having previously fixed antibodies or antibody fragments capable of binding antigenic determinants present on said erythrocyte (s) test (s) ; c) determining the presence or absence of a hemagglutination reaction on at least one of said adsorption zones, so as to detect the presence or absence of anti-erythrocyte antibodies in said sample; said steps a) and b) being carried out separately or simultaneously.
- the in vitro detection method according to the invention can be characterized in that the said anti-erythrocyte antibodies to be detected are capable of specifically binding antigenic determinants chosen from the following systems or antigens: AB O, Rhesus, Kell, MNS, P, Lutheran, lewis, Duffy, Kidd, Diego, Cartwright, Xg, Scianna, Dombrock, Colton, Landsteiner-Wiener, Chido / Rodgers, Hh, Kx, Gerbich, Cromer, Knops, Indian, OK, RAPH, John Milton Hagen, Li, Globoside, GIL, Rh-associated glycoprotein, Forssmann, JR, LAN, VEL, CD59.
- antigenic determinants chosen from the following systems or antigens: AB O, Rhesus, Kell, MNS, P, Lutheran, lewis, Duffy, Kidd, Diego, Cartwright, Xg, Scianna, Dombrock, Colton, Landsteiner-Wiener
- the in vitro detection method according to the invention can be characterized in that the said anti-erythrocyte antibodies to be detected are capable of specifically binding antigenic determinants of the ABO system.
- the in vitro detection method according to the invention can be characterized in that the said antibodies or antibody fragments of the adsorption zone are monoclonal or polyclonal antibodies chosen from: anti-A antibodies (ABOI) , anti-B antibodies (AB02), anti-AB antibodies (AB03), anti-H antibodies (H1), anti-D antibodies (RH1), anti-C antibodies (RH2), anti- antibodies c (RH4), anti-E antibodies (RH3), anti-e antibodies (RH5), anti-K antibodies (KEL1), anti-k antibodies (KEL2), anti-Kpb antibodies (KEL4), anti-Fya antibodies (FY1), anti-Fyb antibodies (FY2), anti-Jka antibodies (JK1), anti-Jkb antibodies (JK2), anti-S antibodies (MNS3), anti-s antibodies (MNS4), anti-Lea antibodies (LE1), anti-Leb antibodies (LE2), anti-M antibodies (MNS1), anti-N antibodies (MNS2), anti-A
- the in vitro detection method according to the invention can be characterized in that at least two of the adsorption zones of the solid support each fix a plurality antibody and / or antibody fragment (s) capable of binding a distinct erythrocyte antigenic determinant.
- the in vitro detection method according to the invention can be characterized in that the sample is a biological sample chosen from: a human serum, a human plasma, a human sample of whole blood.
- the in vitro detection method according to the invention can be characterized in that at least two of the adsorption zones of the solid support are spaced from each other by at least 100 ⁇ m, and / or that said zones d 'adsorption define an area of at least 10,000 ⁇ m2.
- the in vitro detection method according to the invention can be characterized in that said solid support is a plastic support, and said adsorption zones are hydrophilic.
- the in vitro detection method according to the invention can be characterized in that said plurality of delimited absorption zones forms a wall inclined relative to the rest of all or part of said solid support; for example, which comprises an inclined plane which forms an angle with a horizontal plane made up of all or part of said solid support, and in particular an angle with a horizontal plane made up of all or part of a zone of said solid support not fixing antibody and / or antibody fragment (s).
- the in vitro detection method according to the invention can be characterized in that said plurality of delimited absorption zones is planar, conical or hemispherical.
- the in vitro detection method according to the invention can be characterized in that the antibodies or fragments of antibodies capable of binding the antigenic determinants are attached to the delimited adsorption zones, in a non-covalent manner.
- the in vitro detection method according to the invention can be characterized in that the areas of adsorption of the solid support are, at least in part, functionalized by one or more binding polymers comprising a polysaccharide backbone.
- - carboxylic acid groups of the form -X-COOH, where X represents a linear or branched alkyl chain, substituted or not, comprising from 1 to 6 carbon atoms.
- the in vitro detection method according to the invention can be characterized in that said solid support is, at least in part, functionalized with one or more linker polymers comprising one or more positively charged groups. pH of said reaction mixture.
- the in vitro detection method according to the invention can be characterized in that the presence or absence of a hemagglutination reaction on said, or said, adsorption zone (s) is determined by comparison with a reference zone distinct from said, or said, zone (s) of said solid support.
- step c) of determination is carried out after a step of sedimentation of said reaction mixture on said solid support.
- the in vitro detection method according to the invention can be characterized in that step c) of determination is carried out after a step of centrifugation of said solid support.
- Figure 1 illustration of the general principle of the invention, applied to the determination of anti-erythrocyte antibodies in a sample.
- Figure 2 illustration of a biochip / plate plan, or network of deposits, including at the bottom of the well one or more spots (or delimited adsorption areas), made up of anti-ABO and 3 anti-D antibodies.
- Spot A represents an anti-ABOL deposit.
- Spot B represents an anti-AB02 deposit.
- Spot DI represents a deposit of anti D.
- Spot D2 represents a deposit of anti D.
- Spot D3 represents a deposit of anti D.
- Figure 3 Photographic images of the bottom of the well in the presence of human plasma samples.
- 3A result of a test using an AB sample.
- 3B result of a test using a sample A.
- 3C result of a test using a B sample.
- 3D result of a test using an O sample.
- Figure 4 Photographic images of the bottom of the well in the presence of human plasma samples.
- 4A result of a test from a negative irregular sample.
- 4B result of a test from a negative irregular sample.
- 4C result of a test from a positive irregular sample.
- 4D test result from a positive irregular sample.
- plural such as “plurality of adsorption zones” implies the presence of "at least two”; this term can therefore, for example, designate 2, 3, 4, 5, 6, 7, 8, 9, 10, or even more than 10.
- erythrocyte red blood cell
- red blood cell red blood cell
- antigenic determinant present on erythrocytes encompasses not only any antigenic determinant present physiologically on the surface of erythrocytes, in particular any blood group determinant, but also any other determinant present on the surface of said erythrocytes, in particular not -physiological, and / or resulting from immunological reactions, relating to innate or acquired immunity, such as antibodies, or fragments of antibodies, or elements belonging to the complement system.
- sample used in particular to designate a biological sample, encompasses in particular any sample likely to have been obtained beforehand from an individual, which includes any bodily fluid or fraction of bodily fluid, or tissue biopsy, which is susceptible.
- erythrocytes and / or anti-erythrocyte antibodies physiological or pathological, regular or irregular.
- a biological sample can denote herein any blood sample, or blood sample pellet, and / or any other preparation derived from blood, such as a whole blood sample, serum or plasma, lymph or cerebrospinal fluid.
- a sample is also likely to include a sample of saliva, sweat, tears, milk, or urine.
- antibody or antibody fragment encompasses all molecules of the immunoglobulin type, as well as any immunologically active part of said immunoglobulins, such as molecules containing one or more sites of interaction with a specific antigen of said immunoglobulins.
- this term is not only limited to whole, regular (natural) or irregular antibodies, but also encompasses antibody fragments and their synthetic or recombinant variants. Unless otherwise indicated, this term therefore encompasses both so-called natural and non-natural antibodies, or synthetic, obtained recombinantly or not.
- Antibodies are conventionally defined by two heavy chains linked together by a disulfide bridge, and each heavy chain is itself linked to a light chain by one or more disulfide bridges.
- this term therefore encompasses all the antibodies, or fragments of said antibodies, comprising one of the five main classes of heavy chain, chosen from IgM, IgD, IgG, IgA and IgE; or one of the two types of light chain chosen from lambda (1) and kappa (k).
- synthetic antibody encompasses all the antibodies obtained in vitro and comprising at least one fragment of a variable region of antibodies.
- the synthetic antibodies can thus be chosen from the following constructions: Fab, a F (ab) '2, single domain antibody (sdAb), ScFv, Fab-scFv, ScFv-Fc, Sc (Fv) 2, diabody, di-diabody , triabody, tetrabody, pentabody, unibody, minibody, maxibody, nanobody, Small Modular Immunopharmaceutical (SMIP), and fragments comprising variable regions such as variable light (VF) and heavy (HF) chains.
- SMIP Small Modular Immunopharmaceutical
- fragments comprising variable regions such as variable light (VF) and heavy (HF) chains.
- VF variable light
- HF heavy chains.
- anti-erythrocyte antibody or “anti-erythrocyte antibody” here designates any antibody, regular or irregular, directed against at least one antigenic determinant present on the
- regular antibody or “natural antibody” here designates any anti erythrocyte antibody capable of being naturally present in an individual, therefore apart from any pathology and exposure to an external antigen.
- This type of antibody generally includes all ABO (eg anti-A and anti-B) and H antibodies.
- interleukin here denotes any anti-erythrocyte antibody which is not systematically present in subjects lacking the corresponding antigen.
- non-AB O antibodies are conventionally defined as irregular antibodies, which includes in particular the following antibodies: anti-D, anti-C, anti-E, anti-c, anti-e, anti-K , anti-k, anti-Cw, anti-Kpa, anti-Kpb, anti-Fya, anti-Fyb, anti-Jka, anti-Jkb, anti-Fea, anti-Feb, anti-M, anti-N, anti -S, anti-s, anti-Fua, anti-Fub.
- hemagglutination denotes, according to its usual meaning, all the agglutination reactions comprising the binding of anti-erythrocyte antibodies on antigenic structures present on the surface of red blood cells, and capable of causing, directly or indirectly , the formation of an aggregate of red blood cells. This term therefore encompasses both direct, indirect and passive hemagglutination reactions.
- the present invention relates to an in vitro method for detecting anti-erythrocyte antibodies in a sample, comprising at least the following steps: a) bringing said sample into contact with one or more erythrocyte (s) test (s) or suspension of erythrocyte (s) test (s) of known phenotype, under conditions liable to induce haemagglutination, so as to obtain a reaction mixture; b) contacting said reaction mixture with a solid support containing a plurality of delimited adsorption zones having previously fixed antibodies or antibody fragments capable of binding antigenic determinants present on said erythrocyte (s) test (s) ; c) determining the presence or absence of a hemagglutination reaction on at least one of said adsorption zones, so as to detect the presence or absence of anti-erythrocyte antibodies in said sample; said steps a) and b) being carried out separately or simultaneously.
- steps a) and b) are carried out separately.
- steps a) and b) are carried out simultaneously.
- the in vitro detection method can be characterized in that it comprises the following steps: a) contacting (i) a solid support containing a plurality of delimited adsorption zones having previously fixed antibodies or antibody fragments capable of binding antigenic determinants present on test erythrocyte (s), with (ii) a sample and (iii) one or more of said erythrocyte ( s) test (s) or suspension of erythrocyte (s) test (s) of known phenotype, under conditions liable to induce haemagglutination; then b) determining the presence or absence of a hemagglutination reaction on at least one of said adsorption zones, so as to detect the presence or absence of anti-erythrocyte antibodies in said sample .
- the in vitro detection method according to the invention can be characterized in that the said anti-erythrocyte antibodies to be detected are regular or irregular antibodies.
- These antibodies are capable of specifically binding erythrocyte surface antigens.
- the in vitro detection method according to the invention can be characterized in that the said anti-erythrocyte antibodies to be detected are capable of specifically binding antigenic determinants chosen from the following systems or antigens: ABO, Rhesus, Kell, MNS , P, Lutheran, lewis, Duffy, Kidd, Diego, Cartwright, Xg, Scianna, Dombrock, Colton, Landsteiner-Wiener, Chido / Rodgers, Hh, Kx, Gerbich, Cromer, Knops, Indian, OK, RAPH, John Milton Hagen , Li, Globoside, GIL, Rh-associated glycoprotein, Forssmann, JR, LAN, VEL, CD59.
- said anti-erythrocyte antibodies to be detected may be able to specifically bind antigenic determinants chosen from the AB O and Rhesus systems or antigens.
- said anti-erythrocyte antibodies to be detected are capable of specifically binding antigenic determinants of the ABO system.
- said anti-erythrocyte antibodies to be detected can be anti-A antibodies, anti-B antibodies, or anti-H antibodies.
- the antibodies likely to be detected are so-called regular antibodies.
- the anti-erythrocyte antibodies to be detected are chosen from IgM, IgD, IgG, IgA and IgE; in particular chosen from IgM and IgG.
- the biological sample can in particular be any sample capable of containing anti-erythrocyte antibodies, and in particular any biological fluid, such as a sample of blood, in particular of whole blood, or of a blood derivative, such as plasma or blood. serum, urine, cerebrospinal fluid, lymph, saliva, or a tissue sample, such as biopsied tissue, a cell, or a collection of cells, or combinations thereof.
- a blood derivative designates any product, in particular fluid, obtained from a blood sample.
- the sample to be analyzed can also be a culture medium and / or a culture supernatant.
- the sample Before being analyzed, the sample can undergo one or more preliminary treatment steps, such as dilution, centrifugation, heat and / or chemical treatment, cell lysis (for example by one or more chaotropic agents, one or more reducing agents and / or by heating), extraction, addition of an unlabeled detection ligand or their combinations.
- preliminary treatment steps such as dilution, centrifugation, heat and / or chemical treatment, cell lysis (for example by one or more chaotropic agents, one or more reducing agents and / or by heating), extraction, addition of an unlabeled detection ligand or their combinations.
- the sample may also be a mixture of at least two samples which may be of the same or different nature, from the same individual or from different individuals.
- a mixture of samples of a different nature there may be mentioned a mixture of blood and serum, a mixture of blood and plasma, a mixture of serum and plasma, or else a mixture of blood, serum and plasma.
- a preferred sample according to the invention is a sample or a mixture of samples of blood and / or derived from blood.
- the in vitro detection method according to the invention can be characterized in that the sample is a biological sample chosen from: a human serum, a human plasma, a human sample of whole blood.
- the in vitro detection method according to the invention may involve a step of contacting a sample with one or more test erythrocyte (s) or test erythrocyte suspension (s) of known phenotype.
- the in vitro detection method according to the invention can thus be characterized in that it comprises at least the following steps: a) bringing a sample into contact with one or more test erythrocyte (s) ( s) or suspension of erythrocyte (s) test (s) of known phenotype, under conditions liable to induce haemagglutination, so as to obtain a reaction mixture; b) contacting said reaction mixture with a solid support containing a plurality of delimited adsorption zones having previously fixed antibodies or antibody fragments capable of binding antigenic determinants present on said erythrocyte (s) test (s) ; c) determining the presence or absence of a haemagglutination reaction on the adsorption areas brought into contact with said sample, so as to detect the presence or absence of anti-erythrocyte antibodies in said sample; said steps a) and b) being carried out separately or simultaneously.
- the in vitro detection method according to the invention can be characterized in that the presence or absence of a hemagglutination reaction on said, or said, adsorption zone (s) is determined by comparison with a reference zone distinct from said solid support.
- said separate reference zone from said solid support may comprise or consist of a separate delimited adsorption zone, and / or a separate compartment, and / or a separate spot.
- the in vitro detection method according to the invention can be characterized in that the determination step is carried out after a step of sedimentation of said reaction mixture on said solid support.
- the in vitro detection method according to the invention can be characterized in that the determination step is carried out after a step of centrifugation of said solid support.
- the in vitro detection methods according to the invention are particularly suitable for the implementation of the Simonin test, and in particular in the form of multiplexed methods.
- the in vitro detection methods according to the invention are particularly suitable for the detection of anti-erythrocyte antibodies, and in particular of antibodies directed against antigenic determinants of the ABO system.
- the antibodies attached to the adsorption zones delimited by the solid support are in particular chosen from anti-A antibodies (ABOI), anti-B antibodies (AB02), anti-AB antibodies (AB03).
- the test erythrocytes of known phenotype are in particular chosen from erythrocytes expressing the antigenic determinants A1 and B.
- the said erythrocyte (s) -test (s) have a known or determinable Rhesus phenotype.
- all or part of this or these test erythrocyte (s) is of Rhesus negative phenotype.
- at least one of these test erythrocyte (s) is of Rhesus (D) negative phenotype.
- the solid support suitable for the invention comprises at least two delimited adsorption zones each fixing antibodies or fragments of antibodies capable of binding antigenic determinants of erythrocytes. distinct.
- a solid support suitable for the implementation of an in vitro method according to the invention contains a plurality of delimited adsorption zones, said adsorption zones binding antibodies or antibody fragments capable of binding antigenic determinants of erythrocytes.
- a solid support very particularly suitable for the invention is a solid support of multiplex type, that is to say a support capable of detecting one or more anti-erythrocyte antibodies (for example two, three, four, five, six, seven, eight, nine, ten, eleven, twelve, thirteen, fourteen, fifteen or more than fifteen), on one or more samples as described in the present application, and this simultaneously or not, during a multiplex analysis process.
- one or more anti-erythrocyte antibodies for example two, three, four, five, six, seven, eight, nine, ten, eleven, twelve, thirteen, fourteen, fifteen or more than fifteen
- Such a solid support can be in particular in the form of a plate, a microplate, a slide, beads, a membrane or a strip of several wells or of a single well.
- a solid support may be in the form of a microplate or a strip of several wells or of a single well.
- a solid support can be any material suitable for carrying out the analysis method, such as a plastic or other than plastic support.
- Such a solid support is for example a support based on a polymer or a mixture of polymers.
- a suitable solid support according to the invention is, for example, a support made of polystyrene, polypropylene, poly (meth) acrylate, polybutadiene or their combinations.
- an appropriate solid support is based on polystyrene, such as: a breakable or non-breakable microplate of the COSTAR High binding type, or any other breakable or non-breakable polystyrene microplate and having a high binding power.
- solid support suitable according to the invention is for example an inorganic support, such as glass, and / or a metallic support.
- a suitable solid support is a membrane, for example a membrane of nitrocellulose, PVDF (Polyvinylidene fluoride), nylon or their combinations.
- PVDF Polyvinylidene fluoride
- a solid support suitable for the process comprises a single compartment.
- Said single compartment may be a compartment comprising one or several walls.
- said single compartment can be devoid of walls, and then be assimilated to the solid support itself.
- the bottom of the compartment can then consist of the upper face of the solid support.
- An example of such a solid support comprising a single compartment with or without one or more walls is a strip or a membrane.
- said single compartment can be devoid of walls while being separated from the other compartments by a zone which makes it possible to avoid mixing between 2 adjacent samples, for example a hydrophobic zone.
- a solid support for example a slide or a membrane
- a single compartment typically at least one (for example one or two) solid support is used per sample to be analyzed.
- a solid support suitable for the method comprises a plurality of compartments.
- a solid support comprises at least two compartments
- said compartments can be isolated from each other, so that they do not communicate with each other, or in a limited manner, that is to say so that the different compositions or solutions used for the analysis cannot circulate from one compartment to another during the analysis, or at least not freely.
- a solution for example a sample added in one compartment does not go into the other compartments, or in a limited manner.
- the compartment or compartments comprise or consist of a bottom and one or more walls, said wall or walls isolating the compartment or compartments from each other so that they do not communicate with each other.
- An example of a compartment is a well.
- a solid support comprises for example a plurality of wells, for example a set of at least 2 wells.
- a solid support is, for example, a microplate.
- the microplate can be a 96-well or a 384-well microplate.
- a solid support suitable for the process comprises a plurality of delimited adsorption zones. Said delimited adsorption zones can in particular comprise, or even consist of, spots.
- a bounded absorption zone does not necessarily have a single defined shape.
- a delimited adsorption zone can thus comprise one or more spots, spaced evenly or not, and comprising at least one antibody or antibody fragments capable of binding antigenic determinants of erythrocytes, bound to the surface. of said support, and / or where appropriate of said compartment, in particular by non-covalent physicochemical interactions (in particular of weak bond type, for example ionic, van der Waals, hydrogen and / or hydrophobic) and / or by covalent bonds.
- the delimited adsorption zones of the solid support in particular the deposits of antibodies or antibody fragments
- the delimited adsorption zones of the solid support can be obtained manually or by any device, in particular any device suitable for the preparation of microarrays, such as a device with or without contact, in particular any device making it possible to deposit volumes smaller than one microliter, such as piezoelectric or solenoid valve systems.
- spot denotes here a delimited adsorption zone, or part of a delimited adsorption zone of the solid support, for example of a compartment of the solid support, comprising at least the said compound of interest linked to the surface of said solid support (or even, where appropriate, of said compartment), in particular by non-covalent physicochemical interactions (in particular of weak bond type, for example ionic, van der Waals, hydrogen and / or hydrophobic) and / or by covalent bonds, generally obtained by depositing at least one drop of a solution containing a determined quantity of said compound (s) of interest (s) at a specific location on the surface of said support and / or the said compartment.
- weak bond type for example ionic, van der Waals, hydrogen and / or hydrophobic
- a spot may be of discoidal, cylindrical or approximately discoidal or cylindrical shape, for example oval, in particular when a solid support is a microplate or a slide.
- a spot can be square or rectangular in shape (this can be in particular a strip), for example when a solid support is a membrane, or of any other form.
- a solid support can thus comprise at least two, or even three, delimited adsorption zones, for example three zones, four zones or five zones, or at least six zones.
- a solid support can thus comprise at least three spots, for example three spots, four spots or five spots, or at least six spots.
- said antibodies or antibody fragments of the adsorption zone are monoclonal or polyclonal antibodies chosen from: anti-A antibodies (ABOI), anti-B antibodies (AB02), anti-B antibodies.
- -AB AB03
- anti-H antibodies (Hl) anti-D antibodies (RH1), anti-C antibodies (RH2), anti-c antibodies (RH4), anti-E antibodies (RH3) , anti-e antibodies (RH5), anti-K antibodies (KEL1), anti-k antibodies (KEL2), anti-Kpb antibodies (KEL4), anti-Fya antibodies (FY1), anti- Fyb (FY2), anti-Jka antibodies (JK1), anti-Jkb antibodies (JK2), anti-S antibodies (MNS3), anti-s antibodies (MNS4), anti-Lea antibodies (LE1), anti-Leb antibodies (LE2), anti-M antibodies (MNS1), anti-N antibodies (MNS2), anti-Pl antibodies, anti-Kpa antibodies (KEL)
- said antibodies or antibody fragments of the adsorption zone are monoclonal or polyclonal antibodies chosen from: anti-A antibodies (ABOI), anti-B antibodies (AB02), anti-B antibodies.
- -AB AB03
- anti-D antibodies RH1
- anti-C antibodies RH2
- anti-c antibodies RH4
- anti-E antibodies RH3
- anti-e antibodies RH5
- anti-K antibodies KEL1
- anti-k antibodies KEL2
- anti-Kpb antibodies KEL4
- anti-Fya antibodies FY1, anti-Fyb antibodies (FY2), anti- Jka (JK1), anti-Jkb antibodies (JK2), anti-S antibodies (MNS3)
- anti-s antibodies MNS4)
- anti-Lea antibodies L1
- anti-Leb antibodies L2
- anti-M antibodies MNS1
- anti-N antibodies MNS2
- anti-Lua antibodies anti-
- Such antibodies or antibody fragments from the adsorption zone are, for example, monoclonal or polyclonal antibodies, such as those likely to be available for sale from Diagast, Merck, Quotient or Biorad, and chosen from: - anti-A monoclonal antibodies (ABOI), anti-B monoclonal antibodies (AB02), anti-AB monoclonal antibodies (AB03) which are said to be murine IgMs,
- MNS2 - anti-N monoclonal antibodies
- RH1 anti-D monoclonal antibodies
- RH2 anti-C monoclonal antibodies
- RH4 anti-c monoclonal antibodies
- RH3 anti-e monoclonal antibodies
- RH5 anti-Cw antibodies
- KEL1 anti-K monoclonal antibodies
- JK1 anti-Jka monoclonal antibodies
- JK2 anti-Jkb monoclonal antibodies
- MNS3 anti-S monoclonal antibodies
- MNS4 anti-Pl monoclonal antibodies which are said to be human IgMs
- RH1 anti-D monoclonal antibodies
- KEL2 anti-k monoclonal antibodies
- FY1 anti-Fya monoclonal antibodies
- MNS1 anti-M monoclonal antibodies
- KEL4 anti-Kpb antibodies
- KEL3 anti-Lua antibodies
- LAI anti-Lub antibodies
- FY2 anti-Fyb antibodies
- L1 anti-Lea
- L2 anti-Leb antibodies
- At least two of the adsorption zones of the solid support each bind a plurality of antibodies and / or antibody fragment (s) capable of binding a distinct erythrocyte antigenic determinant.
- At least two of the delimited adsorption zones (for example spots) comprising said antibodies or antibody fragments of the solid support are spaced apart from each other by at least 100 ⁇ m, which may include in particular at least 100 ⁇ m. minus 200, 300, 400,500, 600, 700, 800, 900 or 1000 pm.
- said adsorption zones define an area of at least 10,000 ⁇ m 2 , which may in particular include at least 100,000, 20,000, 30,000, 40,000, or 50,000 ⁇ m 2 .
- said adsorption zones comprise or consist of zones (in particular spots) of 50 to 500 ⁇ m in maximum dimension (in particular in diameter), which comprises, 50, 60, 70, 80, 90 , 100, 150, 200, 250, 300, 350, 400, 450 and 500 pm.
- at least two of the adsorption zones of the solid support are spaced from each other by at least 100 ⁇ m, and / or that said adsorption zones define an area of at least 10,000 ⁇ m 2 .
- said adsorption zones are hydrophilic or hydrophobic.
- said solid support is a plastic support, and said adsorption zones are hydrophilic.
- the in vitro detection method according to the invention can be characterized in that said plurality of delimited absorption zones form a wall inclined relative to the rest of all or part of said solid support.
- the in vitro detection method according to the invention can be characterized in that said plurality of delimited absorption zones is planar, conical or hemispherical.
- the antibodies or antibody fragments capable of binding the antigenic determinants are attached to the delimited adsorption zones, covalently.
- the antibodies or antibody fragments capable of binding the antigenic determinants are attached to the defined adsorption zones, non-covalently.
- the adsorption zones of the solid support are, at least in part, functionalized by one or more binding polymers, the said binding polymer (s) immobilizing the said antibodies or fragments. antibodies capable of binding antigenic determinants.
- the areas of adsorption of the solid support are, at least in part, functionalized by one or more binding polymers, covalently or non-covalently.
- binding polymers may for example consist of binding polymers mentioned in WO2012 / 052874.
- the adsorption zones of the solid support are, at least in part, functionalized with one or more linker polymers comprising a polysaccharide backbone.
- polysaccharide backbone as defined here encompasses any structure formed by a set of sugars (or saccharide units), linked together by osidic bonds, in particular O-osidic bonds.
- This polysaccharide backbone can in particular be linear or branched. According to certain embodiments, it comprises from 80 to 600 saccharide units, and in particular from 150 to 350 saccharide units.
- the adsorption zones of the solid support are, at least in part, functionalized with one or more linker polymers comprising a polysaccharide backbone provided with aromatic groups and / or carboxylic acid groups, substituted or not.
- the areas of adsorption of the solid support are, at least in part, functionalized by one or more linker polymers comprising a polysaccharide backbone provided:
- - carboxylic acid groups of the form -X-COOH, where X represents a linear or branched alkyl chain, substituted or not, comprising from 1 to 6 carbon atoms.
- the adsorption zones of the solid support are, at least in part, functionalized by one or more binding polymers attached to said substrate (in particular to said delimited adsorption zone) in a non- covalent, and comprising a polysaccharide skeleton provided:
- the adsorption zones of the solid support are, at least in part, functionalized by one or more binding polymers attached to said substrate (in particular to said delimited adsorption zone) in a non- covalent, and comprising a polysaccharide skeleton provided:
- - carboxylic acid groups of the form -X-COOH, where X represents a linear or branched alkyl chain, substituted or not, comprising from 1 to 6 carbon atoms; and
- binding polymer (s) immobilizing said antibodies or antibody fragments capable of binding said antigenic determinants.
- said solid support is, at least in part, functionalized with one or more linker polymers comprising one or more groups positively charged at the pH of said reaction mixture.
- Anti-A (ABOI) and anti-B (AB02) antibodies were deposited at the bottom of the microtiter plate wells to form a plurality of demarcated adsorption zones.
- the samples (human plasmas) to be tested are brought into contact with test red blood cells in the wells.
- the wells containing the test red blood cells and the samples are then centrifuged for 2 min at 2000 g. After centrifugation, the supernatant is removed and the bottom of the wells is imaged.
- the presence or absence of agglutination may or may not be detected at each antibody deposit by visual analysis or by image analysis.
- Three different anti-D antibodies were deposited at the bottom of the wells of microtiter plates to form a plurality of demarcated adsorption zones.
- the samples (human plasma) to be tested are brought into contact with one or more test red blood cells in source plate wells.
- the wells containing the test red blood cells and the samples are then centrifuged for 2 min at 800 g.
- the supernatant is removed, then 2 washes in PBS are carried out. After the last centrifugation, the supernatant is removed.
- the resulting pellet is resuspended in LISS buffer. To this mixture is added anti human globulin before depositing in the well of the biochip.
- the wells are then centrifuged for 2 minutes at 2000 g.
- Anti-A (ABOI), anti-B (AB02) and 3 anti-D antibodies, obtained from culture media were purified beforehand. Each well of a previously functionalized microtiter plate was printed with these antibodies diluted in PBS buffer.
- a contactless deposition robot using piezoelectric technology) with a deposition system generating drops of 500 ⁇ L is used.
- the plates are then dried using a thermo ventilator for 10 minutes at 80 ° C. and then directly saturated with 200 ⁇ L of a solution of 5% milk in PBS for 1 hour at room temperature.
- the plates are then washed 3 times with 200 ⁇ L of PBS.
- the wells are finally emptied, dried for 1 hour at 37 ° C. before being wrapped and sealed in the presence of a sachet of desiccant in an aluminum bag.
- test red cells A 100 ⁇ L of undiluted human plasma are mixed with 50 ⁇ L of a red blood cell suspension containing 0.5% of blood cells from patient A (test red cells A) and 0.5% of blood cells from patient B (red blood cells tests B). The mixture is transferred to a well in which antibodies have been deposited beforehand.
- the plates are centrifuged for 2 minutes at 2000 g at 4 ° C.
- the supernatant is removed and then a PB S washing step is carried out.
- the bottoms of the wells of the microtiter plate are then imaged.
- FIG. 3A corresponds to a photo of a biochip incubated in the presence of a sample from a patient AB. Regular and homogeneous spots are observed on the anti-A and anti B deposits, indicating the absence of agglutination.
- FIG. 3B corresponds to a photo of a biochip incubated in the presence of a sample from a patient A. Regular and homogeneous spots are observed on the anti-A deposits and irregular and very intense spots are observed on the deposits. anti B. This indicates the absence of agglutination of test A red blood cells but agglutination of test B red blood cells.
- Figure 3C corresponds to a photo of a biochip incubated in the presence of a sample from a patient B. Spots regular and homogeneous spots are observed on anti-B deposits and irregular and very intense spots are observed on anti-A deposits. This indicates the absence of agglutination of the B test red cells but agglutination of the A test red cells.
- Figure 3D corresponds to a biochip incubated in the presence of a sample from a patient O. Only irregular and very intense spots are observed, both on the anti-A deposits but also on the anti-B deposits. This indicates agglutination of test A and B red blood cells.
- Figure 4A corresponds to a photo of a biochip incubated in the presence of a sample from a patient without irregular antibodies. Regular and homogeneous spots are observed on the anti-D deposits, indicating the absence of agglutination.
- FIG. 4B corresponds to a photo of a biochip incubated in the presence of a second sample obtained from a patient not possessing an irregular antibody. Regular and homogeneous spots are observed on the anti-D deposits, indicating the absence of agglutination.
- FIG. 4C corresponds to a photo of a biochip incubated in the presence of a sample obtained from a patient possessing irregular anti-K antibodies. Irregular and very intense spots are observed on anti-D deposits. This indicates agglutination of the test red blood cells and therefore the presence of irregular antibodies.
- FIG. 4D corresponds to a photo of a biochip incubated in the presence of a sample obtained from a patient possessing irregular anti-D antibodies. Irregular and very intense spots are observed on anti-D deposits. This indicates agglutination of the test red blood cells and therefore the presence of irregular antibodies.
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Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2001091A FR3106900B1 (fr) | 2020-02-04 | 2020-02-04 | Procédé de capture et d’identification d’agglutinats cellulaires pour la détection d’anticorps anti-érythrocytaires multiplexe |
| PCT/EP2021/052712 WO2021156391A1 (fr) | 2020-02-04 | 2021-02-04 | Procede de capture et d'identification d'agglutinats cellulaires pour la detection d'anticorps anti-erythrocytaires multiplexe |
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| Publication Number | Publication Date |
|---|---|
| EP4100745A1 true EP4100745A1 (fr) | 2022-12-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP21704212.6A Pending EP4100745A1 (fr) | 2020-02-04 | 2021-02-04 | Procede de capture et d'identification d'agglutinats cellulaires pour la detection d'anticorps anti-erythrocytaires multiplexe |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20230062669A1 (fr) |
| EP (1) | EP4100745A1 (fr) |
| JP (1) | JP2023515730A (fr) |
| FR (1) | FR3106900B1 (fr) |
| WO (1) | WO2021156391A1 (fr) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3162859A1 (fr) | 2024-06-04 | 2025-12-05 | Innobiochips | Dispositif et procédé de centrifugation pour la détection de microparticules dans un échantillon biologique |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4608246A (en) | 1983-03-10 | 1986-08-26 | Immucor, Inc. | Testing for a blood group immunological reaction |
| DE3686474T2 (de) | 1985-10-11 | 1993-02-11 | Abbott Lab | Diagnostische probe. |
| JP2520136B2 (ja) * | 1987-08-27 | 1996-07-31 | オリンパス光学工業株式会社 | 自動分析装置 |
| CA2309528C (fr) * | 1999-06-08 | 2007-10-09 | Ortho-Clinical Diagnostics, Inc. | Determination du groupage abo par execution simultanee des tests avant et inverse |
| WO2002016942A1 (fr) | 2000-08-23 | 2002-02-28 | Scibiex Biologie S.A.R.L. | Procede d'analyse immunologique par reaction d'adherence |
| US7026131B2 (en) | 2000-11-17 | 2006-04-11 | Nagaoka & Co., Ltd. | Methods and apparatus for blood typing with optical bio-discs |
| GB0506183D0 (en) * | 2005-03-24 | 2005-05-04 | Univ Edinburgh | Antigen detection |
| FR2892820B1 (fr) | 2005-11-03 | 2008-02-01 | Diagast Soc Par Actions Simpli | Procede magnetique d'immunodiagnostic pour la mise en evidence de complexe anticorps/antigene, en particulier de groupe sanguin |
| FR2917174B1 (fr) * | 2007-06-08 | 2021-02-12 | Bio Rad Pasteur | Analyse multiple d'echantillons sanguins |
| FR2918460B1 (fr) | 2007-07-02 | 2013-10-04 | Najim Chaibi | Nouveau dispositif permettant l'obtention des resultats des systemes abo,rhesus et autres pherotypes et systemes rares, rai. |
| JP5306901B2 (ja) * | 2009-05-25 | 2013-10-02 | ベックマン コールター, インコーポレイテッド | 血液型判定方法およびそのための赤血球固相化容器 |
| FR2963108B1 (fr) | 2010-07-21 | 2017-06-23 | Diagast | Procede magnetique d'immunodiagnostic et kit pour la mise en evidence de complexe anticorps/antigene de groupe/phenotype sanguin |
| FR2966248B1 (fr) * | 2010-10-18 | 2020-05-01 | Centre National De La Recherche Scientifique (Cnrs) | Procede de fonctionnalisation de surfaces pour la detection d'analytes |
| US12241894B2 (en) | 2018-02-16 | 2025-03-04 | Diagast | In vitro diagnosis device comprising beads and uses thereof |
-
2020
- 2020-02-04 FR FR2001091A patent/FR3106900B1/fr active Active
-
2021
- 2021-02-04 WO PCT/EP2021/052712 patent/WO2021156391A1/fr not_active Ceased
- 2021-02-04 EP EP21704212.6A patent/EP4100745A1/fr active Pending
- 2021-02-04 US US17/760,021 patent/US20230062669A1/en active Pending
- 2021-02-04 JP JP2022572809A patent/JP2023515730A/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| JP2023515730A (ja) | 2023-04-13 |
| WO2021156391A1 (fr) | 2021-08-12 |
| FR3106900A1 (fr) | 2021-08-06 |
| US20230062669A1 (en) | 2023-03-02 |
| FR3106900B1 (fr) | 2024-10-04 |
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