期刊
ADVANCED MATERIALS
卷 34, 期 39, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.202110588
关键词
immunotherapy; metal-organic layers; nanoparticles; radiosensitizers; stimulator of interferon gene agonists
类别
资金
- National Cancer Institute [U01-CA198989, 1R01CA253655]
- University of Chicago Medicine Comprehensive Cancer Center [NIH CCSG: P30 CA014599]
This study reports a novel nanoplatform, cGAMP/MOL, that can simultaneously activate STING and enhance radiosensitization. By improving the delivery of STING agonists and combining with an immune checkpoint inhibitor, it can effectively enhance anti-tumor efficacy.
Despite potent preclinical antitumor activity, activation of stimulator of interferon genes (STING) has shown modest therapeutic effects in clinical studies. Many STING agonists, including 2 ',3 '-cyclic guanosine monophosphate-adenosine monophosphate (cGAMP), show poor pharmacokinetic properties for sustaining STING activation in tumors and achieving optimal antitumor efficacy. Improved delivery of STING agonists and their effective combination with other treatments are needed to enhance their therapeutic effects. Herein, a 2D nanoplatform, cGAMP/MOL, is reported via conjugating cGAMP to a nanoscale metal-organic layer (MOL) for simultaneous STING activation and radiosensitization. The MOL not only exhibits strong radiosensitization effects for enhanced cancer killing and induction of immunogenic cell death, but also retains cGAMP in tumors for sustained STING activation. Compared to free cGAMP, cGAMP/MOL elicits stronger STING activation and regresses local tumors upon X-ray irradiation. Further combination with an immune checkpoint inhibitor bridges innate and adaptive immune systems by activating the tumor microenvironment to elicit systemic antitumor responses.
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