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 PDFInfo
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- C07K2317/56—Immunoglobulins specific features characterized by immunoglobulin fragments variable (Fv) region, i.e. VH and/or VL
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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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Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0953133A FR2945538B1 (fr) | 2009-05-12 | 2009-05-12 | Anticorps humanises specifiques de la forme protofibrillaire du peptide beta-amyloide. |
| FR0953133 | 2009-05-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ES2664409T3 true ES2664409T3 (es) | 2018-04-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES10728743.5T Active ES2542757T3 (es) | 2009-05-12 | 2010-05-11 | Anticuerpos humanizados específicos de la forma protofibrilar del péptido beta-amiloide |
| ES15160538.3T Active ES2664409T3 (es) | 2009-05-12 | 2010-05-11 | Anticuerpos humanizados específicos de la forma protofibrilar del péptido beta-amiloide |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ES10728743.5T Active ES2542757T3 (es) | 2009-05-12 | 2010-05-11 | Anticuerpos humanizados específicos de la forma protofibrilar del péptido beta-amiloide |
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| HUE033325T2 (en) * | 2007-01-05 | 2017-11-28 | Univ Zuerich | Anti-beta-amyloid binder antibodies and their use |
| BRPI0808551B1 (pt) * | 2007-03-01 | 2022-04-05 | Symphogen A/S | Composições de anticorpo para o receptor do fator de crescimento antiepidérmico recombinante, molécula de ligação bi-específica e composição farmacêutica que os compreende |
| EP2195023B1 (en) | 2007-08-29 | 2018-03-07 | Sanofi | Humanized anti-cxcr5 antibodies, derivatives thereof and their uses |
| AU2008322523B2 (en) * | 2007-11-16 | 2013-10-10 | The Rockefeller University | Antibodies specific for the protofibril form of beta-amyloid protein |
| DK3211005T3 (da) * | 2008-07-08 | 2021-06-07 | Geneuro Sa | Terapeutisk anvendelse af specifik ligand i msrv-associerede sygdomme |
| CN108373509A (zh) * | 2009-03-10 | 2018-08-07 | 贝勒研究院 | 靶向抗原呈递细胞的抗病毒疫苗 |
| BRPI1009454A2 (pt) * | 2009-03-10 | 2019-09-24 | Baylor Res Institute | vacinas contra o câncer direcionadas a células apresentadoras de antígenos |
| TWI508976B (zh) * | 2009-04-21 | 2015-11-21 | Univ Rockefeller | 對β-類澱粉蛋白之基原纖維形式具專一性之抗體 |
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