Engineering CD3/CD137 Dual Specificity into a DLL3-Targeted T-Cell Engager Enhances T-Cell Infiltration and Efficacy against Small-Cell Lung Cancer.
Cancer Immunol Res
; 12(6): 719-730, 2024 Jun 04.
Article
em En
| MEDLINE
| ID: mdl-38558120
ABSTRACT
Small-cell lung cancer (SCLC) is an aggressive cancer for which immune checkpoint inhibitors (ICI) have had only limited success. Bispecific T-cell engagers are promising therapeutic alternatives for ICI-resistant tumors, but not all patients with SCLC are responsive. Herein, to integrate CD137 costimulatory function into a T-cell engager format and thereby augment therapeutic efficacy, we generated a CD3/CD137 dual-specific Fab and engineered a DLL3-targeted trispecific antibody (DLL3 trispecific). The CD3/CD137 dual-specific Fab was generated to competitively bind to CD3 and CD137 to prevent DLL3-independent cross-linking of CD3 and CD137, which could lead to systemic T-cell activation. We demonstrated that DLL3 trispecific induced better tumor growth control and a marked increase in the number of intratumoral T cells compared with a conventional DLL3-targeted bispecific T-cell engager. These findings suggest that DLL3 trispecific can exert potent efficacy by inducing concurrent CD137 costimulation and provide a promising therapeutic option for SCLC.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Linfócitos T
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Complexo CD3
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Peptídeos e Proteínas de Sinalização Intracelular
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Membro 9 da Superfamília de Receptores de Fatores de Necrose Tumoral
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Carcinoma de Pequenas Células do Pulmão
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Neoplasias Pulmonares
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Proteínas de Membrana
Limite:
Animals
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Female
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Humans
Idioma:
En
Ano de publicação:
2024
Tipo de documento:
Article