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Tumor-targeted delivery of a STING agonist improves cancer immunotherapy.
- Source :
- Proceedings of the National Academy of Sciences of the United States of America; 12/6/2022, Vol. 119 Issue 49, p1-11, 23p
- Publication Year :
- 2022
-
Abstract
- The cGAS-STING pathway is essential for immune defense against microbial pathogens and malignant cells; as such, STING is an attractive target for cancer immunotherapy. However, systemic administration of STING agonists poses safety issues while intratumoral injection is limited by tumor accessibility. Here, we generated antibody-drug conjugates (ADCs) by conjugating a STING agonist through a cleavable linker to antibodies targeting tumor cells. Systemic administration of these ADCs was well tolerated and exhibited potent antitumor efficacy in syngeneic mouse tumor models. The STING ADC further synergized with an anti-PD-L1 antibody to achieve superior antitumor efficacy. The STING ADC promoted multiple aspects of innate and adaptive antitumor immune responses, including activation of dendritic cells, T cells, natural killer cells and natural killer T cells, as well as promotion of M2 to M1 polarization of tumor-associated macrophages. These results provided the proof of concept for clinical development of the STING ADCs. [ABSTRACT FROM AUTHOR]
- Subjects :
- KILLER cells
CYTOTOXIC T cells
CANCER cells
T cells
ANTIBODY-drug conjugates
Subjects
Details
- Language :
- English
- ISSN :
- 00278424
- Volume :
- 119
- Issue :
- 49
- Database :
- Complementary Index
- Journal :
- Proceedings of the National Academy of Sciences of the United States of America
- Publication Type :
- Academic Journal
- Accession number :
- 160672469
- Full Text :
- https://doi.org/10.1073/pnas.2214278119