ES2664409T3 - Anticuerpos humanizados específicos de la forma protofibrilar del péptido beta-amiloide - Google Patents

Anticuerpos humanizados específicos de la forma protofibrilar del péptido beta-amiloide Download PDF

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ES2664409T3
ES2664409T3 ES15160538.3T ES15160538T ES2664409T3 ES 2664409 T3 ES2664409 T3 ES 2664409T3 ES 15160538 T ES15160538 T ES 15160538T ES 2664409 T3 ES2664409 T3 ES 2664409T3
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antibody
peptide
beta
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Nicolas Baurin
Francis Blanche
Béatrice Cameron
Marc Duchesne
Vincent Mikol
Souad Naimi
Laurent Pradier
Yi Shi
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Sanofi SA
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    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K16/00—Immunoglobulins [IG], e.g. monoclonal or polyclonal antibodies
    • C07K16/18—Immunoglobulins [IG], e.g. monoclonal or polyclonal antibodies against material from animals or humans
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
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    • A—HUMAN NECESSITIES
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    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P25/00—Drugs for disorders of the nervous system
    • A61P25/28—Drugs for disorders of the nervous system for treating neurodegenerative disorders of the central nervous system, e.g. nootropic agents, cognition enhancers, drugs for treating Alzheimer's disease or other forms of dementia
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K39/00—Medicinal preparations containing antigens or antibodies
    • A61K39/395—Antibodies; Immunoglobulins; Immune serum, e.g. antilymphocytic serum
    • A61K39/39533—Antibodies; Immunoglobulins; Immune serum, e.g. antilymphocytic serum against materials from animals
    • A61K39/3955—Antibodies; Immunoglobulins; Immune serum, e.g. antilymphocytic serum against materials from animals against proteinaceous materials, e.g. enzymes, hormones, lymphokines
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07H—SUGARS; DERIVATIVES THEREOF; NUCLEOSIDES; NUCLEOTIDES; NUCLEIC ACIDS
    • C07H21/00—Compounds containing two or more mononucleotide units having separate phosphate or polyphosphate groups linked by saccharide radicals of nucleoside groups, e.g. nucleic acids
    • C07H21/04—Compounds containing two or more mononucleotide units having separate phosphate or polyphosphate groups linked by saccharide radicals of nucleoside groups, e.g. nucleic acids with deoxyribosyl as saccharide radical
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K2317/00—Immunoglobulins specific features
    • C07K2317/20—Immunoglobulins specific features characterized by taxonomic origin
    • C07K2317/24—Immunoglobulins specific features characterized by taxonomic origin containing regions, domains or residues from different species, e.g. chimeric, humanized or veneered
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K2317/00—Immunoglobulins specific features
    • C07K2317/30—Immunoglobulins specific features characterized by aspects of specificity or valency
    • C07K2317/33—Crossreactivity, e.g. for species or epitope, or lack of said crossreactivity
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K2317/00—Immunoglobulins specific features
    • C07K2317/50—Immunoglobulins specific features characterized by immunoglobulin fragments
    • C07K2317/52—Constant or Fc region; Isotype
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K2317/00—Immunoglobulins specific features
    • C07K2317/50—Immunoglobulins specific features characterized by immunoglobulin fragments
    • C07K2317/56—Immunoglobulins specific features characterized by immunoglobulin fragments variable (Fv) region, i.e. VH and/or VL
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K2317/00—Immunoglobulins specific features
    • C07K2317/50—Immunoglobulins specific features characterized by immunoglobulin fragments
    • C07K2317/56—Immunoglobulins specific features characterized by immunoglobulin fragments variable (Fv) region, i.e. VH and/or VL
    • C07K2317/565—Complementarity determining region [CDR]
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K2317/00—Immunoglobulins specific features
    • C07K2317/70—Immunoglobulins specific features characterized by effect upon binding to a cell or to an antigen
    • C07K2317/71—Decreased effector function due to an Fc-modification
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07K—PEPTIDES
    • C07K2317/00—Immunoglobulins specific features
    • C07K2317/90—Immunoglobulins specific features characterized by (pharmaco)kinetic aspects or by stability of the immunoglobulin
    • C07K2317/92—Affinity (KD), association rate (Ka), dissociation rate (Kd) or EC50 value
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    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
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    • C12N15/00—Mutation or genetic engineering; DNA or RNA concerning genetic engineering, vectors, e.g. plasmids, or their isolation, preparation or purification; Use of hosts therefor
    • C12N15/09—Recombinant DNA-technology
    • C12N15/63—Introduction of foreign genetic material using vectors; Vectors; Use of hosts therefor; Regulation of expression
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    • C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
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    • C12N15/00—Mutation or genetic engineering; DNA or RNA concerning genetic engineering, vectors, e.g. plasmids, or their isolation, preparation or purification; Use of hosts therefor
    • C12N15/09—Recombinant DNA-technology
    • C12N15/63—Introduction of foreign genetic material using vectors; Vectors; Use of hosts therefor; Regulation of expression
    • C12N15/79—Vectors or expression systems specially adapted for eukaryotic hosts
    • C12N15/85—Vectors or expression systems specially adapted for eukaryotic hosts for animal cells
    • C12N15/8509—Vectors or expression systems specially adapted for eukaryotic hosts for animal cells for producing genetically modified animals, e.g. transgenic
    • C12N2015/8518—Vectors or expression systems specially adapted for eukaryotic hosts for animal cells for producing genetically modified animals, e.g. transgenic expressing industrially exogenous proteins, e.g. for pharmaceutical use, human insulin, blood factors, immunoglobulins, pseudoparticles

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  • Medicines Containing Antibodies Or Antigens For Use As Internal Diagnostic Agents (AREA)
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  • Preparation Of Compounds By Using Micro-Organisms (AREA)
  • Medicines That Contain Protein Lipid Enzymes And Other Medicines (AREA)
  • Medicines Containing Material From Animals Or Micro-Organisms (AREA)

Abstract

Anticuerpo humanizado específico de la forma protofibrilar del péptido A-β, caracterizado por que: - dicho anticuerpo tiene unas funciones efectoras disminuidas, - la parte variable de su cadena pesada comprende una secuencia que presenta al menos 90% de identidad con la secuencia SEC ID NO: 6 o SEC ID NO: 28; - la parte variable de su cadena ligera comprende una secuencia que presenta al menos 90% de identidad con la secuencia SEC ID NO: 8 o SEC ID NO: 24; - dicho anticuerpo tiene una afinidad por la forma protofibrilar del péptido Aβ al menos 100 veces superior a su afinidad por las otras formas de este péptido, siendo la afinidad la EC50 medida por ELISA; y 15 - dicho anticuerpo se une a los péptidos A-β agregados en placas seniles y no a los depósitos difusos de péptidos A-β.

Description

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Breve descripción de las figuras:
Figura 1A: Mapa del plásmido pXL4973 que permite la expresión de la cadena ligera LC1 del anticuerpo antiAbeta 13C3-VH1VL1.
Figura 1B: Mapa del plásmido pXL4979 que permite la expresión de la cadena pesada HC1 del anticuerpo antiAbeta 13C3-VH1VL1.
Figuras 2A y 2B: separación de las protobibrillas y de los oligómeros de baja masa molecular por gel filtración sobre Superdex 75 (respectivamente a t=0 y a t=16h).
Figura 3: Determinación de la masa molecular de las protofibrillas.
Figuras 4A, 4B y 4C: Determinación de las afinidades de los anticuerpos humanizados (respectivamente anticuerpos LP09027 (4A), LP09026 (4B) y LP09028 (4C)) para la fotofibrillas (media de 3 experimentos ± sem).
Figura 5: Especificidad del anticuerpo humanizado LP09027 frente a unas fibrillas de A.
Figuras 6A y 6B: Especificidad del anticuerpo humanizado (LP09027) para las placas maduras seniles, respectivamente de la corteza frontal (6A) y del hipocampo (6B) de un ratón. Las flechas indican las placas seniles.
Ejemplos
Ejemplo 1: Obtención de los anticuerpos humanizados
Se humanizó un anticuerpo murino 13C3.
Este ejemplo describe la secuencia y la obtención del anticuerpo humanizado anti-péptido A VH1VL1 (LP09027) por producción en expresión transitoria en la línea mamífero HEK293 denominada FreeStyle 293-F.
Los ADNc que codifican para las cadenas variables humanizadas VL1 y VH1 se fusionan a los ADNc que codifican para las regiones constantes humanas Ckappa e IgG4 respectivamente. La secuencia de la región constante IgG4 es la de la variante que tiene las sustituciones S241P y L248E en la nomenclatura de Kabat, a fin de disminuir significativamente la producción de semi-moléculas (Angla et al., 1993, Mol. Immunol., 30: 105-108) y las funciones efectoras (WO 97/09351).
Las secuencias nucleicas que codifican para CH1 (SEC ID NO: 1) y CL1 (SEC ID NO: 3) se clonaron independientemente en el vector de expresión para generar respectivamente los plásmidos pXL4973 (Fig 1A) y pXL4979 (Fig 1 B).
Un lote del anticuerpo está producido por producción en expresión transitoria en la línea FreeStyle 293-F (Invitrogen) después de la cotransfección de los plásmidos pXL4973 y pXL4979 según el protocolo descrito por Invitrogen (referencia de catálogo K9000-01). Este lote (LP09027) se purifica después por cromatografía de afinidad sobre una columna de gel MabSelect (Amersham) según las recomendaciones del proveedor y después se formula en el tampón PBS (referencia Dulbecco 14190-094) y filtrado estérilmente (0,2 µm). A partir de 1 l de cultivo, se obtienen 33 mg de anticuerpos con una pureza del 97% por SDS-PAGE en condiciones desnaturalizantes y por cromatografía de exclusión estérica. La masa obtenida por SDS-PAGE en condiciones desnaturalizantes y por LC/MS está de acuerdo con la secuencia primaria en aminoácidos y la presencia de un N-glucano sobre el dominio Fc, es decir una masa de 23969 Da para la LC1 y 49650 Da para la HC1, teniendo en cuenta el N-glucano en forma G0F. La masa obtenida por SDS-PAGE en condiciones no desnaturalizantes y por cromatografía de exclusión de tamaño está de acuerdo con la estructura heterotetramérica del anticuerpo 150 kDa.(Fig 4A).
Según el mismo procedimiento, los lotes de anticuerpo humanizados LP09026 y LP09028 se produjeron a partir de secuencias nucleotídicas SEC ID NO: 25 y SEC ID NO: 21 para LP09026 (Fig 4B), y SEC ID NO: 1 y SEC ID NO: 21 para LP09028 (Fig 4C).
Ejemplo 2: Preparación de las protofibrillas a partir del péptido A (1-42)
Las protofibrillas se prepararon a partir del péptido sintético A (1-42) según el método descrito por Johansson et al. (FEBS, 2006, 2618-2630). El péptido liofilizado (Anaspec referencia 24224) se pone en solución en 10mM de NaOH a la concentración de 100µM, después se agita durante 1 minuto y se incuba sobre hielo durante 10 minutos. La solución de péptido se diluye después en el tampón 100mM fosfato de sodio, 200mM de NaCl pH=7,4 a una concentración de 50 µM, y después se agita durante 1 minuto. La preparación se incuba durante una noche a 37°C para obtener la formación de fotofibrillas y después se centrifuga a 17900g durante 15 minutos a 16°C para eliminar los agregados insolubles. Para separar las protofibrillas de las formas oligoméricas de A de baja masa molecular, el
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Claims (1)

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ES15160538.3T 2009-05-12 2010-05-11 Anticuerpos humanizados específicos de la forma protofibrilar del péptido beta-amiloide Active ES2664409T3 (es)

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FR0953133A FR2945538B1 (fr) 2009-05-12 2009-05-12 Anticorps humanises specifiques de la forme protofibrillaire du peptide beta-amyloide.
FR0953133 2009-05-12

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