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Resultados del estudio clínico de fase I del anticuerpo bifuncional PD-1/CTLA-4 de Qilu Pharma
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May 12, 2023, 11:42 ET

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-Resultados del estudio clínico de fase I del anticuerpo bifuncional PD-1/CTLA-4 Iparomlimab/Tuvonralimab de Qilu Pharma publicado en línea en Journal of Hematology & Oncology

JINAN, China, 12 de mayo de 2023 /PRNewswire/ -- El 8 de mayo de 2023, Journal of Hematology & Oncology (JHO, 2022 factor de impacto de 23.168) publicó los resultados del estudio clínico de fase I del anticuerpo bifuncional de inmunoterapia de Qilu Pharma, QL1706 (J Hematol Oncol. 8 de mayo de 2023;16(1):50). Este estudio es el primer gran ensayo clínico de fase I de QL1706 en humanos, y fue dirigido por el Prof. Li Zhang y su equipo del Centro Oncológico de la Universidad Sun Yat-sen. Los resultados respaldan el uso de la inmunoterapia dual en pacientes con tumores sólidos avanzados.

QL1706 es un bloqueante dual bifuncional desarrollado por Qilu Pharma utilizando la novedosa plataforma tecnológica de anticuerpos MabPair para producir simultáneamente dos anticuerpos monoclonales de ingeniería en una sola célula, el anticuerpo PD-1 IgG4 iparomlimab y el anticuerpo CTLA-4 IgG1 tuvonralimab. El anticuerpo CTLA-4 tiene una semivida de eliminación más corta in vivo, con una exposición más corta para los anticuerpos CTLA-4 en un ciclo de dosificación.

Un total de 518 pacientes se inscribieron en este estudio, de los cuales 99 pacientes en el estudio de fase I de escalada de dosis recibieron una dosis única de QL1706 (intravenosa, cada 3 semanas) a 0,3-10 mg/kg para determinar la dosis máxima tolerada (DMT), la dosis recomendada de fase II (RP2D), la seguridad, la farmacocinética (FC) y la farmacodinámica (FD) de QL1706. En el estudio de fase Ib, 419 pacientes con tumores sólidos avanzados recibieron 5 mg/kg (RP2D) de QL1706 (administrados cada 3 semanas) para evaluar la eficacia preliminar de QL1706 en el tratamiento del cáncer de pulmón no microcítico (CPNM), el carcinoma nasofaríngeo (CNF), el cáncer de cuello uterino (CC) y otros tumores sólidos.

La incidencia de acontecimientos adversos relacionados con el tratamiento (TRAE) fue del 74,9% (388/518) en todos los pacientes, con un 16% de TRAE de grado 3 o superior. Treinta (5,8%) pacientes abandonaron el estudio debido a los TRAE. Los efectos adversos más frecuentes fueron erupción cutánea (19,7%), hipotiroidismo (13,5%) y prurito (13,3%). La incidencia de acontecimientos adversos relacionados con el sistema inmunitario (irAEs) fue del 46,1% (239/518), con un 8,1% de irAEs de grado 3 o superior.

Con una evaluación exhaustiva, se determinó que la RP2D de QL1706 era de 5 mg/kg. En la parte de fase Ib, los pacientes fueron tratados con QL1706 en RP2D. La mediana de seguimiento fue de 9,5 meses. La tasa de respuesta objetiva (ORR) fue del 16,9% (79/468) y la mediana de la duración de la respuesta (DoR) fue de 11,7 meses (95% CI, 8,3 - no alcanzada). En el cáncer de cuello uterino, NPC, el cáncer de pulmón microcítico y el CPNM, la ORR fue del 27,3% (15/55), el 24,5% (27/110), el 23,1% (6/26) y el 14,0% (17/121), respectivamente. La ORR en el CPNM, NPC y el cáncer de cuello uterino no tratados con inmunoterapia fue del 24,2%, 38,7% y 28,3%, respectivamente.

El ensayo clínico de fase I de QL1706 ha demostrado que QL1706 es seguro y bien tolerado. QL1706 mostró una buena ORR en tumores sólidos avanzados y una mayor ORR en NPC, cáncer de cuello de útero y cáncer de pulmón. QL1706 más quimioterapia se está estudiando actualmente en varios ensayos clínicos de fase III en cáncer de cuello de útero, tratamiento adyuvante de CPNM, CPNM avanzado y NPC.

El Prof. Li Zhang, del Centro Oncológico de la Universidad Sun Yat-sen, declaró: "QL1706 es el primer producto de Mabpair dirigido contra PD-1 y CTLA-4, y el artículo publicado presenta el primer gran estudio de fase I de QL1706 en humanos. Los resultados mostraron que QL1706 fue bien tolerado en tumores sólidos avanzados y demostró una buena actividad antitumoral en CPNM avanzado, NPC, cáncer de cuello uterino y otros tumores. Este estudio respalda firmemente la investigación clínica de QL1706, que se espera se convierta en un nuevo enfoque de inmunoterapia dual. Esperamos que esta innovadora inmunoterapia dual esté disponible para los pacientes lo antes posible."

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