WO2017125892A2 - Anticuerpos monoclonales específicos para el antígeno piii de adenovirus humano (adv), producidos y secretados por hibridomas celulares, útiles para la detección y el diagnóstico de la infección causada por adv - Google Patents
Anticuerpos monoclonales específicos para el antígeno piii de adenovirus humano (adv), producidos y secretados por hibridomas celulares, útiles para la detección y el diagnóstico de la infección causada por adv Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K16/00—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies
- C07K16/08—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from viruses
- C07K16/081—Immunoglobulins [IGs], e.g. monoclonal or polyclonal antibodies against material from viruses from DNA viruses
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P31/00—Antiinfectives, i.e. antibiotics, antiseptics, chemotherapeutics
- A61P31/12—Antivirals
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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
- G01N33/543—Immunoassay; Biospecific binding assay; Materials therefor with an insoluble carrier for immobilising immunochemicals
- G01N33/54313—Immunoassay; Biospecific binding assay; Materials therefor with an insoluble carrier for immobilising immunochemicals the carrier being characterised by its particulate form
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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
- G01N33/569—Immunoassay; Biospecific binding assay; Materials therefor for microorganisms, e.g. protozoa, bacteria, viruses
- G01N33/56983—Viruses
Definitions
- Monoclonal antibodies specific for human adenovirus II I (ADV) antigen produced and secreted by cellular hybridomas, useful for the detection and diagnosis of ADV infection.
- ADV adenovirus II I
- the present invention relates to monoclonal antibodies, or fragments thereof, that recognize the adenovirus plll protein (ADV), useful for the development of diagnostic methods for ADV infection in humans.
- ADV adenovirus plll protein
- ADV human adenovirus
- conjunctivitis conjunctivitis
- gastroenteritis to respiratory diseases of all kinds such as mild pharyngitis to acute respiratory diseases of the lower respiratory tract, such as pneumonia.
- ADV is known to be a persistent virus, remaining dormant in previously infected individuals and being able to reactivate by various factors, leading to a more severe disease generation.
- Its genome contains double stranded DNA, which has no nuclear envelope and codes for 9 proteins.
- the capsid that covers it has an icosahedra shape and is composed of 3 main proteins: Hexon, Pentón (highly conserved) and fiber. Studies have reported that penton protein and fiber are responsible for the attack and entry into the host cell, the latter promoting the internalization of the virus by interacting with receptors on the cell surface. There are more than 50 ADV serotypes in humans, which are grouped into 6 species that are subdivided from AF. Within the subdivision some strains - B, C and E - have greater clinical relevance in respiratory diseases, where the degree of severity of the disease will depend on the age (children ⁇ 4 years and adults) and the immune status of infected patients.
- ADV diagnostic and detection methods performed by Public Health services include a test based on the detection of viral antigens by direct immunofluorescence in swab or nasopharyngeal aspirate samples, polymerase chain reaction (PCR) and culture cell, from blood sample.
- PCR polymerase chain reaction
- RVP Respiratory Viral Panel
- the monoclonal antibodies of the invention appear as a necessary alternative to meet said need, since they allow the specific recognition of viral antigens in samples of patients infected with ADV.
- antibodies used for research purposes Thermo Scientific Cat. # MS-587) and diagnosis (abcam® ab6982), however there have been no reported monoclonal antibodies that specifically recognize the plll protein of this virus.
- a monoclonal antibody is a type of homogeneous antibody that is characterized by specifically recognizing a single antigen. They are produced by a single hybrid cell (hybridoma), which is the product of the fusion of a B-lymphocyte clone and a tumor plasma cell.
- hybrida the product of the fusion of a B-lymphocyte clone and a tumor plasma cell.
- the property of specifically binding and with high affinity to an antigen has driven the development of monoclonal antibodies as a tool very useful for the detection of molecules that generate a great scientific, clinical and industrial use interest.
- monoclonal antibodies are widely used, both in basic and applied research, due to their specificity and reproducibility, which allows to better support research.
- monoclonal antibodies have had enormous practical applications, either for diagnosis and treatment of multiple infectious diseases, and as therapy for other pathologies. While it is true that monoclonal antibodies are used in all types of detection and diagnostic techniques, it is in the design of in vitro diagnostic kits where the best results have been obtained. To this end, there are currently several rapid detection kits, such as the pregnancy test, which is based on the determination of chorionic gonadotrophin (hCG) levels in the urine using anti hCG antibody. In addition, monoclonal antibodies for therapeutic use have gained great relevance. At present there are therapeutic treatments for different pathologies, through the use of commercial monoclonal antibodies such as: Alemtuzumad, Gemtuzumab ozogamicin, Rituximab, Trastumab, among others.
- hCG chorionic gonadotrophin
- US201 10262892A1 describes methods of virus detection or measurement, wherein one of the viruses detected is Adenovirus, however this The document does not speak of specific monoclonal antibodies or fragments thereof that recognize Adenovirus plll protein as if the present application does.
- the present invention comprises products, such as monoclonal antibodies, and an alternative method that uses them for rapid, efficient and accurate detection and diagnosis in patients infected with ADV with 100% specificity in clinical samples and capable of detecting by ELISA. equivalent concentrations 1.5 ng of the specific antigen. This will allow clinical professionals to determine early an appropriate clinical protocol for individuals suffering from a respiratory infection caused by this virus.
- the present invention relates to two monoclonal antibodies against Adenovirus (ADV).
- ADV Adenovirus
- the present invention involves two murine monoclonal antibodies, secreted by hybridoma cell lines designated 7E1 1 and 6F1 1, and which react against the ADV plll antigen. These antibodies do not compete with each other for the antigen binding site, nor do they exert an impediment to simultaneously bind to it.
- Said monoclonal antibodies can be used for tests of detection, diagnosis and / or determination of ADV infection. These antibodies can be used. simultaneously to increase the sensitivity of detection in clinical samples where there is little quantity and availability of antigen.
- antibodies from hybridoma 7E1 1 are capable of efficiently capturing the ADV plll protein in clinical samples.
- hybridoma 6F1 1 The invention provides the opportunity to develop methods of ex vivo or in vitro diagnosis and detection of the ADV plll viral antigen, in which the monoclonal antibodies produced and secreted by hybridomas 7E1 1 and 6F1 1 are used in assays such as ELISA, microscopy of fluorescence and immunoblot.
- the samples to be analyzed can be: in vitro cells infected with ADV, nasal secretions, nasal washes, pharyngeal secretions and / or lavages or bronchial secretions, serum, cerebrospinal fluid, among others.
- the invention provides the ability to detect ADV in biological samples and cell cultures, using the monoclonal antibodies produced and / or secreted by the hybridoma cell lines mentioned above, coupled to any type of solid support, such as nitrocellulose, nylon membrane, spheres. magnetic, fluorescent spheres or other support; or coupled to any other molecule, such as enzymes, proteins, fluorophores, radioactive isotopes or any other chemical compound.
- the invention can be used in detection kits for ADV, comprising the antibodies produced by the mentioned hybridomas.
- the present invention includes within its scope to incorporate any type of chemically bound molecule or substrate, such as markers, fluorophores, biotin, radioisotopes, metals, enzymes and / or any chemical element coupled to monoclonal antibodies secreted by hybridomas 7E1 1 and 6F1 1, wherein said chemically bonded molecule or substrate makes it possible to visualize or detect the antibody.
- the invention also provides antibodies that specifically recognize the plll protein coupled to molecules, substrates or markers other than the antibody, as part of the method of detection, analysis and / or diagnosis in biological samples.
- Figure 1 Detection of ADV plll protein by monoclonal antibodies produced by hybridomas 7E11 and 6F11, by an indirect ELISA assay.
- the plate was activated with 50 ng of plll recombinant protein from purified ADV, or with 1 x 10 6 pfu of ADV.
- the wells were incubated with the anti-plll antibodies from hybridoma 7E1 1, in the amount of 170 ng (A) and the hybridoma 6F1 1 in the amount of 170 ng (B).
- the data shown in the graph expresses the absorbance detected at 450 nm, emitted by the conversion of the Tetramethylbenzidine substrate to a colored compound, catalyzed by the Horseradish peroxidase enzyme (HRP) present in a secondary mouse anti-IgG antibody that specifically bound to antibodies secreted by hybridomas 7E1 1 and 6F1 1.
- the values correspond to the average +/- standard deviation of the absorbance emitted by each sample in at least two independent experiments.
- the data shown in the graph expresses the absorbance at 450 nm emitted by the conversion of the Tetramethylbenzidine substrate to a colored compound catalyzed by the Horseradish peroxidase enzyme (HRP) present in the anti-plll antibodies from hybridomas 7E1 1 and 6F1 1 in quantity of 170 ng (A and B).
- HRP Horseradish peroxidase enzyme
- FIG. 3 Assay of serial dilutions of ADV anti-plll monoclonal antibodies produced by hybridomas 7E11 and 6F11, for the detection of purified ADV antigens.
- ELISA plates were activated with 50 ng of ADV plll recombinant protein and the antigen was detected with 1: 2 serial dilutions of the 7E1 1 or 6F1 1 anti-plll antibodies, starting at a concentration of 3.4 ⁇ g / ml (170 ng)
- Data are expressed as the average value of absorbance emitted at 450 nm of each duplicate sample, in at least two independent experiments.
- FIG. 4 Confirmation of specificity of monoclonal antibodies secreted by hybridomas 7E11 and 6F11, by dot blot.
- ADV anti-plll antibodies produced by hybridomas 7E1 1 or 6F1 1 were incubated for 1 hour with a nitrocellulose membrane containing the following immobilized samples (in the form of spots or "dots"): hVRS (1 x10 6 pfu) , ADV (1 x10 6 pfu), BSA (1 ⁇ g), ADV plll protein (1 ⁇ , 500 ng and 50 ng), and 20 ⁇ g of extract of uninfected A549 cells and infected with ADV.
- the membrane was washed and incubated for 1 hour with a secondary anti-mouse IgG antibody conjugated to the HRP protein.
- visualization of the junction of the monoclonal antibodies to the antigen was performed by capturing the chemiluminescence produced by catalysis of the commercial substrate "enhanced chemiluminescence Western blot detection system" (ECL, Amersham, Uppsala, Sweden). It is observed that the antibodies produced by the 7E1 1 or 6F1 1 hybridoma bind only to the "dots" where ADV plll protein, ADV virus and ADV infected cells are present, confirming the specificity of these antibodies.
- FIG. 5 Detection of ADV plll protein by immunofluorescence in AD5 infected A549 cells.
- A549 cells were grown in vitro to reach a confluence of 70-90%, to be infected for 48 hours with ADV. Subsequently, these were fixed with paraformaldehyde and prepared for indirect immunofluorescence. For this, it was used as a primary monoclonal antibody derived from hybridoma 7E1 1 or hybridoma 6F1 1, in addition to a commercial anti-ADV antibody (Abcam).
- a commercial anti-mouse IgG antibody conjugated to Alexa Fluor 488 fluorophore or a rabbit anti-IgG conjugate with the same fluorophore was used, which emits fluorescence at 519 nm (strong signal).
- the nuclei of the cells were stained with the phosphorophore TOPRO-3 iodide, which emits fluorescence at 661 nm (filled circles).
- a strong reactivity is observed in the cytoplasm (white arrows) only in infected cells when either of the two primary antibodies is used.
- FIG. 6 Detection of ADV in clinical samples by sandwich ELISA, using the combination of monoclonal antibodies secreted by hybridomas 7E11 and 6F11.
- ELISA plates were activated with 170 ng of antibody secreted by hybridoma 7E1 1, functioning as capture antibody.
- Wells activated with the capture antibody were incubated with 50 ⁇ of nasopharyngeal swab (HNF) samples from patients presenting with viral respiratory conditions.
- HNF nasopharyngeal swab
- 10 samples of control patients negative for respiratory viruses
- 20 samples of ADV positive patients were used and as a control of specificity, 20 samples of patients positive for RSV were included.
- As a positive control wells were added to which purified ADV plll protein was added.
- the antibodies produced by the hybridoma 6F1 1, conjugated to the HRP enzyme were used in a 1: 2000 dilution (75 ng per well).
- the data shown are the average +/- the standard deviation of the absorbance value emitted at 450 nm from each sample ( *** P ⁇ 0.001 by the one-way ANOVA test compared to hVRS positive patients or healthy patients).
- the present invention relates to two monoclonal antibodies, or fragments thereof, of the lgG1 isotype, which specifically recognize the plll protein (also referred to herein as anti-plll antibodies), of the Adenovirus (ADV). These antibodies are produced by hybridomas 7E1 1 and 6F1 1.
- the amino acid sequences of the variable regions of both chains of the antibody produced by hybridoma 7E11 are described in SEQ ID No: 1 for the heavy chain and SEQ ID No: 2 for the light chain.
- the nucleotide sequences encoding them are described in SEQ ID No: 3 and SEQ ID No: 4, respectively.
- amino acid sequences of the variable regions of both chains of the antibody produced by the hybridoma 6F11 are described in SEQ ID No: 5 for the heavy chain and SEQ ID No: 6 for the light chain.
- the nucleotide sequences encoding them are described in SEQ ID No: 7 and SEQ ID No: 8, respectively.
- variable sequences From these variable sequences, chimeric antibodies are constructed that comprise them, including either only one of the variable regions, or mixing them in all possible combinations. All such embodiments are within the scope of the present invention. That is, the present invention includes antibodies comprising at least one of the sequences SEQ ID No: 1, SEQ ID No: 2, SEQ ID No: 5 and SEQ ID No: 6 and similar sequences with up to 90%, 95% or 99% homology or identity with respect to any of said amino acid sequences.
- nucleotide sequences comprising at least one of the sequences SEQ ID No: 3, SEQ ID No: 4, SEQ ID No: 7 and SEQ ID No: 8, as well as their complementary reverses and similar sequences with up to 80% , 85%, 90%, 95% and 99% homology or identity with respect to any of said nucleotide sequences.
- the highest degree of homology considered in nucleotide sequences is based on the degeneracy of the genetic code.
- the present invention also includes a set of nucleotide sequences encoding a monoclonal antibody, or fragment thereof, that specifically recognizes the ADV plll protein.
- said antibodies or fragments thereof are conjugated to a label that allows their detection, such as biotin, metals, enzymes, proteins, fluorophores, radioactive isotopes or any other chemical compound.
- the invention also provides methods of ex vivo or in vitro diagnosis and detection of the ADV plll viral antigen in a biological sample, in which the monoclonal antibodies produced and secreted by hybridomas 7E1 1 and 6F1 1 are used in binding detection assays. of the antibody with the antigen.
- the method comprises contacting a biological sample selected from: in vitro cells infected with ADV, nasal secretions, nasal washes, cerebrospinal fluid, pharyngeal secretions and / or lavages or bronchial secretions, among others, with the monoclonal antibody against ADV or a fragment of him secreted by hybridomas 7E1 1 and 6F1 1, and then detect the binding of the antibody with the antigen with an assay selected from: ELISA, immunoblot, immunofluorescence, immuno istochemistry, immunochromatography, flow cytometry, cell sorter, immunoprecipitation and / or Western blot.
- an assay selected from: ELISA, immunoblot, immunofluorescence, immuno istochemistry, immunochromatography, flow cytometry, cell sorter, immunoprecipitation and / or Western blot.
- the method of the present invention comprises antibodies or fragments thereof produced and / or secreted by the hybridoma cell lines mentioned above, coupled with any type of solid support, such as nitrocellulose, nylon membrane, magnetic spheres, fluorescent spheres or other support
- the antibodies or fragments thereof used in the method are conjugated with a label that allows their detection, such as biotin, metals, enzymes, proteins, fluorophores, radioactive isotopes or any other chemical compound.
- the invention also describes a detection kit for ADV, which comprises at least one antibody produced by the mentioned hybridomas.
- the antibodies or fragments thereof produced and / or secreted by the cell lines of the aforementioned hybridomas used in said kits are coupled with any type of solid support, such as nitrocellulose, nylon membrane, magnetic spheres, fluorescent spheres or other support.
- the antibodies or fragments thereof used in the kit are conjugated with a label that allows their detection, such as biotin, metals, enzymes, proteins, fluorophores, radioactive isotopes or any other chemical compound. .
- the diagnostic kit corresponds to an immunochromatographic test, luminex, flow cytometry, immunofluorescence, radioimmunoassay, Western blot, Dot plot, ELISA, immunodiffusion or immunoprecipitation.
- the invention also provides antibodies that recognize specifically the plll protein coupled to molecules or substrates or markers other than the antibody, as part of the method of detection, analysis and / or diagnosis in biological samples.
- Example 1 Determination of the nucleotide sequence encoding the light (VL) and heavy (VH) chains of the variable region of the ADV anti-plll antibody secreted by the 7E11 hybridoma and the ADV anti-plll antibody secreted by the 6F11 hybridoma.
- hybridomas 7E1 1 and 6F1 1 separately.
- the hybridoma was grown in DMEM-high glucose culture medium supplemented with 3.7 g / L of Sodium Bicarbonate and 10% fetal bovine serum, at 37 ° C with 10% C0 2 , to a cell density of 700,000 cells / ml.
- the total RNA of 3.5 x 10 6 cells was obtained, performing a treatment with the compound Trizol (Invitrogen).
- 0.5 ⁇ g of RNA was used to generate the cDNA by retrotranscription reaction with the Impron II kit (Promega).
- the variable region of the genes encoding the kappa and lambda chains of immunoglobulins was amplified by PCR.
- the products PCR were cloned into the cloning vector pTOPO-TA (Invitrogen) according to the manufacturer's instructions and sequenced by the sequencing service of the Pontifical Catholic University of Chile in an Abl prism 3130x1 sequencer (Applied Biosystem).
- the deduced amino acid sequence (SEQ ID NO: 1 and SEQ ID NO: 2 for hybridoma 7E1 1 and SEQ ID NO: 5 and SEQ ID NO: 6 for hybridoma 6F1 1) were obtained using the bioinformatic program Vector NTI (Invitrogen ).
- Example 2 ADV antigen detection assay, determination of specificity of ADV anti-plll monoclonal antibodies for purified ADV antigens by indirect ELISA assay. This test aims to demonstrate the specificity for the plll protein of
- Antigen detection was carried out by the indirect ELISA technique, where the ELISA plate was activated with 50 ng of purified antigen for 1 hour at 37 ° C. In the same way, the plate was activated with 1 x 10 6 ADV plate-forming units (pfu).
- hVRS Human Respiratory Syncytial Virus
- hVRS Human Respiratory Syncytial Virus
- each antibody (7E1 1 and 6F1 1) was incubated at a final concentration of 3.4 ⁇ g / ml, diluted in 10% PBS / FBS, for 1 hour at room temperature (each antibody on a separate plate). No commercial antibody control was used, because no monoclonal or polyclonal antibodies against portein plll have been found commercially.
- the assay was performed to determine the maximum dilution of protein and viruses that ADV anti-plll monoclonal antibodies from hybridomas 7E1 1 and 6F1 1 are capable of detecting by indirect ELISA.
- the plate was activated with 1 1 serial dilutions 1: 2 of ADV plll protein, starting with 50 ng of purified antigen.
- the plaque was activated with serial dilutions of 1: 2, from 1 x 10 5 pfu of virus.
- the anti-plll 7E1 1 or 6F1 1 antibodies were used in a concentration of 3.4 ⁇ g / ml (170 ng / well), diluted in PBS / 10% FBS.
- the mouse anti-lgG detection antibody was added in a dilution of 1: 2,000 (25 ng / well).
- the results showed that the anti-plll antibody 7E1 1 is capable of recognizing up to 1.56 nanograms (ng) of the ADV plll protein.
- Antibody anti-plll from hybridoma 6F1 1 was able to detect up to 3.12 ng of ADV plll protein (Figure 2A).
- anti-plll antibodies from hybridoma 7E1 1 can detect all dilutions made of the virus, in the same way as the antibody from of hybridoma 6F1 1, which would be equivalent to approximately 390 viral particles.
- the two monoclonal antibodies would be efficient and sensitive in the detection of the virus, knowing that there is no commercial antibody until the moment it detects the plll protein ( Figure 2B). Controls that allowed to rule out nonspecific reactions of the antibodies were included in all the trials, which contained all the test components except the sample (plll protein or ADV virus).
- Example 4 Test to determine the efficiency of monoclonal antibodies to detect viral antigens.
- the assay was performed to determine the maximum dilution of the ADV anti-plll monoclonal antibodies from the 7E1 1 and 6F1 1 hybridomas, which allow the detection of the viral antigen.
- the same indirect ELISA technique as in Example 2 was used.
- the plate was activated with 50 ng of purified antigen and the anti-plll antibodies 7E1 1 or 6F1 1 were used making 1 1 dilutions 1: 2 starting with a concentration of 3.4 ⁇ g / ml, using a 10% PBS / FBS solution as diluent.
- Figure 3 shows that at all dilutions that were used in the assay, the anti-plll antibodies 7E1 1 and 6F1 1 are capable of detecting the ADV plll protein.
- the negative control included in this test corresponds to a well that does not contain a sample (plll protein), was blocked with 10% PBS / FBS, it was not added primary antibody (anti-plll 7E1 1 or anti-plll 6F1 1) and only contains mouse anti-lgG antibody conjugated to HRP.
- Example 5 Clinical diagnosis of samples of patients infected with ADV, using ADV anti-plll monoclonal antibody using the sandwich ELISA technique.
- the reading of the Plaque was performed on an Epoch ELISA reader, certified for clinical diagnosis.
- the figure shows that the antibodies produced are specific since they do not recognize cells from patients infected with other viruses (hVRS).
- hVRS Treatment of clinical samples.
- the samples that were used for the tests were obtained from nasopharyngeal swabs contained in universal transport, from the Medical Research Center of the Pontifical Catholic University of Chile. The samples were centrifuged at 2,000 rpm for 10 minutes at 4 e C. Subsequently, the supernatant (SN1) was separated from the pellet; The latter was incubated with 100 ⁇ .
- RIPA Buffer 50 mM Tris-HCI pH 8.0, 150 mM NaCI, 1% NP-40, 0.5% Sodium Deoxycholate, 0.1%, SDS and a cocktail of protease inhibitors
- Example 6 Detection of ADV infection in A549 cells by Immunoflourescence, using ADV anti-plll monoclonal antibodies This test was performed to broaden the spectrum of techniques that allow ADV infection to be detected, using the described invention.
- a fluorescence microscopy assay was carried out, where A549 cells infected or uninfected with ADV were incubated with the ADV anti-plll monoclonal antibodies derived from the 7E1 1 or 6F1 1 hybridomas, in addition to the commercial polyclonal anti-ADV antibody ( Abcam, # ab1039).
- the protocol used was as follows: the cells were fixed with 4% paraformaldehyde diluted in PBS, for 10 minutes at 25 ° C.
- the cells were washed with PBS and permeabilized with 0.2% saponin diluted in PBS / FBS 10 % for 30 minutes at 25 ° C.
- Monoclonal antibodies derived from hybridomas 7E1 1 or 6F1 1 and commercial anti-ADV were added at a concentration of 3.4 ⁇ g / ml, diluted in PBS / 10% FBS for 1 hour at 25 ° C.
- Two washes were subsequently carried out with PBS and the secondary anti-IgG mouse antibody conjugated to the fluorine Alexa fluorine 488 (Life Technologies), and a secondary anti-rabbit IgG antibody, conjugated to the fluorophore Alexa fluorine 488 was added.
- Example 7 Specificity test of ADV anti-plll monoclonal antibodies for purified ADV antigens, by Dot-Blot assay.
- This test aims to confirm the specificity for the ADV plll protein of the antibodies produced by hybridomas 7E1 1 and 6F1 1, using the immunoblot methodology.
- Antigen detection was carried out by technique. dot-blot, where a nitrocellulose membrane is used as a solid support to immobilize the antigen present in a drop of suspension. For this purpose, 2 ⁇ was deposited on the nitrocellulose membrane, each containing: 1 x10 6 pfu of hVRS, 1 x10 6 pfu ADV, purified ADV plll protein ( ⁇ g, 500 ng and 50 ng), 20 ⁇ g of extract of A549 cells infected with ADV and 20 ⁇ g of extract of uninfected A549 cells.
- Antibodies bound to the antigen was performed using an anti-mouse IgG antibody conjugated to HRP (Invitrogen, Life Technologies # 62-6520), which was diluted in blocking solution for 1 h at 25 ° C, to subsequently remove excess non-antibody bound by three washes with 0.05% PBS-Tween-20 at 25 ° C.
- Visualization of the binding of the monoclonal antibodies to the antigen was performed by capturing the chemiluminescence produced by the commercial substrate catalysis "enhanced chemiluminescence Western blot detection system "(ECL, Ame rsham, Uppsala, Sweden), mediated by HRP enzyme bound to mouse anti-IgG antibody.
- Chemiluminescence capture was performed with the MyECL (Thermo Fisher) photodocumentation system.
- antibodies from hybridomas 7E1 1 and 6F1 1 only bind to "dots" that contain ADV, plll protein or ADV-infected cells, and do not bind nonspecifically to "dots. "containing unrelated proteins, other viruses or uninfected cells.
- the examples described in this specification demonstrate the specificity, efficiency, sensitivity and versatility of these monoclonal anti-plll antibodies.
- the examples presented here are a demonstration of some of the uses of ADV anti-plll monoclonal antibodies, but in no case limit the scope of the present invention.
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Priority Applications (9)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA3011569A CA3011569A1 (en) | 2016-01-21 | 2017-01-20 | Monoclonal antibodies specific for the piii antigen of human adenovirus (adv), produced and secreted by cell hybridomas, useful for detection and diagnosis of adv infection |
| EP20166433.1A EP3756685A1 (en) | 2016-01-21 | 2017-01-20 | Monoclonal antibodies specific for the piii antigen of human adenovirus (adv), produced and secreted by cell hybridomas, useful for detection and diagnosis of adv infection |
| EP17741167.5A EP3406262B1 (en) | 2016-01-21 | 2017-01-20 | Monoclonal antibodies specific for the piii antigen of human adenovirus (adv), produced and secreted by cell hybridomas, useful for detection and diagnosis of adv infection |
| BR112018014538-6A BR112018014538A2 (pt) | 2016-01-21 | 2017-01-20 | anticorpos monoclonais específicos para o antígeno piii de adenovírus humano (adv), produzidos e secretados por hibridomas celulares, úteis para detecção e diagnóstico de infecção por adv |
| CN201780007470.2A CN108697796B (zh) | 2016-01-21 | 2017-01-20 | 对于ADV感染的检测和诊断有用的由细胞杂交瘤产生和分泌的对人腺病毒(ADV)的pIII抗原具有特异性的单克隆抗体 |
| ES17741167T ES2898068T3 (es) | 2016-01-21 | 2017-01-20 | Anticuerpos monoclonales específicos para el antígeno pIII de Adenovirus humano (ADV), producidos y secretados por hibridomas celulares, útiles para la detección y el diagnóstico de la infección causada por ADV |
| MX2018008809A MX2018008809A (es) | 2016-01-21 | 2017-01-20 | Anticuerpos monoclonales especificos para el antigeno piii de adenovirus humano (adv), producidos y secretados por hibridomas celulares, utiles para la deteccion y el diagnostico de la infeccion causada por adv. |
| US16/070,730 US10766948B2 (en) | 2016-01-21 | 2017-01-20 | Monoclonal antibodies specific for the pIII antigen of human Adenovirus (ADV), produced and secreted by cell hybridomas, useful for detection and diagnosis of ADV infection |
| ZA2018/04705A ZA201804705B (en) | 2016-01-21 | 2018-07-13 | Monoclonal antibodies specific for the piii antigen of human adenovirus (adv), produced and secreted by cell hybridomas, useful for detection and diagnosis of adv infection |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CL2016000164A CL2016000164A1 (es) | 2016-01-21 | 2016-01-21 | Anticuerpos monoclonales específicos para el antígeno piii de adenovirus humano (adv), producidos y secretados por hibridomas celulares, útiles para la detección y el diagnóstico de la infección causada por adv. |
| CL2016-00164 | 2016-01-21 |
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|---|---|
| WO2017125892A2 true WO2017125892A2 (es) | 2017-07-27 |
| WO2017125892A3 WO2017125892A3 (es) | 2018-04-12 |
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| PCT/IB2017/050312 Ceased WO2017125892A2 (es) | 2016-01-21 | 2017-01-20 | Anticuerpos monoclonales específicos para el antígeno piii de adenovirus humano (adv), producidos y secretados por hibridomas celulares, útiles para la detección y el diagnóstico de la infección causada por adv |
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| US (1) | US10766948B2 (es) |
| EP (2) | EP3756685A1 (es) |
| CN (1) | CN108697796B (es) |
| AR (1) | AR107440A1 (es) |
| BR (1) | BR112018014538A2 (es) |
| CA (1) | CA3011569A1 (es) |
| CL (1) | CL2016000164A1 (es) |
| ES (1) | ES2898068T3 (es) |
| MX (1) | MX2018008809A (es) |
| PE (1) | PE20181498A1 (es) |
| PT (1) | PT3406262T (es) |
| UY (1) | UY37082A (es) |
| WO (1) | WO2017125892A2 (es) |
| ZA (1) | ZA201804705B (es) |
Cited By (1)
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| CN116789807A (zh) * | 2023-06-14 | 2023-09-22 | 珠海重链生物科技有限公司 | 抗腺病毒单克隆抗体及其应用 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CL2018003869A1 (es) * | 2018-12-28 | 2021-01-15 | Univ Pontificia Catolica Chile | Anticuerpos monoclonales específicos para la proteína quimérica l del virus de la parainfluenza humana (piv), secuencias nucleotídicas; método y kit de diagnóstico de infección producida por piv |
| CN113354727B (zh) * | 2021-08-10 | 2021-11-02 | 北京溯本源和生物科技有限公司 | 一组同时检测b/c/e组腺病毒的单克隆抗体和试纸条 |
| WO2024255566A1 (zh) * | 2023-06-14 | 2024-12-19 | 珠海重链生物科技有限公司 | 抗人腺病毒抗体及其制备方法和应用 |
| CN117586385B (zh) * | 2023-11-23 | 2024-05-17 | 广州医科大学附属第一医院(广州呼吸中心) | 抗人4型腺病毒中和抗体及其制备方法和应用 |
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| US4487829A (en) | 1982-03-23 | 1984-12-11 | Massachusetts Institute Of Technology | Production and use of monoclonal antibodies against adenoviruses |
| US6248514B1 (en) * | 1996-07-09 | 2001-06-19 | Canji, Inc. | Methods for measuring viral infectivity |
| EP1801591B1 (en) | 1997-08-04 | 2016-12-28 | Advanced Life Science Institute, Inc. | Methods for detection or measurement of viruses |
| US6673614B2 (en) * | 2000-06-27 | 2004-01-06 | Cell Genesys, Inc. | Rapid methods and kits for detection and semi-quantitation of anti-adenovirus antibody |
| WO2002004522A2 (en) * | 2000-07-10 | 2002-01-17 | Novartis Ag | Bifunctional molecules and vectors complexed therewith for targeted gene delivery |
| EP1664099A2 (en) * | 2003-09-09 | 2006-06-07 | Niels Rudi Pedersen | Adenoviral epitopes |
| CA2548942C (en) * | 2003-12-05 | 2013-10-15 | Her Majesty The Queen In Right Of Canada As Represented By The Minister Of Health | Anti-sars monoclonal antibodies |
| US8003108B2 (en) * | 2005-05-03 | 2011-08-23 | Amgen Inc. | Sclerostin epitopes |
| EP2150276B1 (en) * | 2007-05-03 | 2014-05-21 | Agency For Science, Technology And Research | Antibodies binding to an intracellular prl-1 or prl-3 polypeptide |
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- 2017-01-20 EP EP20166433.1A patent/EP3756685A1/en active Pending
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116789807A (zh) * | 2023-06-14 | 2023-09-22 | 珠海重链生物科技有限公司 | 抗腺病毒单克隆抗体及其应用 |
| CN116789807B (zh) * | 2023-06-14 | 2024-01-16 | 珠海重链生物科技有限公司 | 抗腺病毒单克隆抗体及其应用 |
Also Published As
| Publication number | Publication date |
|---|---|
| PE20181498A1 (es) | 2018-09-18 |
| EP3406262B1 (en) | 2021-07-28 |
| AR107440A1 (es) | 2018-05-02 |
| EP3756685A1 (en) | 2020-12-30 |
| CN108697796A (zh) | 2018-10-23 |
| EP3406262A2 (en) | 2018-11-28 |
| ZA201804705B (en) | 2019-09-25 |
| ES2898068T3 (es) | 2022-03-03 |
| CA3011569A1 (en) | 2017-07-27 |
| CL2016000164A1 (es) | 2016-07-29 |
| UY37082A (es) | 2017-04-28 |
| US10766948B2 (en) | 2020-09-08 |
| PT3406262T (pt) | 2021-11-03 |
| WO2017125892A3 (es) | 2018-04-12 |
| US20190048065A1 (en) | 2019-02-14 |
| EP3406262A4 (en) | 2019-01-09 |
| CN108697796B (zh) | 2023-01-10 |
| BR112018014538A2 (pt) | 2018-12-26 |
| MX2018008809A (es) | 2018-11-29 |
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