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Liposomes loaded with a STING pathway ligand, cyclic di-GMP, enhance cancer immunotherapy against metastatic melanoma

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Title: Liposomes loaded with a STING pathway ligand, cyclic di-GMP, enhance cancer immunotherapy against metastatic melanoma
Authors: Nakamura, Takashi Browse this author →KAKEN DB
Miyabe, Hiroko Browse this author
Hyodo, Mamoru Browse this author →KAKEN DB
Sato, Yusuke Browse this author →KAKEN DB
Hayakawa, Yoshihiro Browse this author →KAKEN DB
Harashima, Hideyoshi Browse this author →KAKEN DB
Keywords: STING
Cancer immunotherapy
Issue Date: 28-Oct-2015
Publisher: Elsevier
Journal Title: Journal of controlled release
Volume: 216
Start Page: 149
End Page: 157
Publisher DOI: 10.1016/j.jconrel.2015.08.026
PMID: 26282097
Abstract: Malignant melanomas escape immunosurveillance via the loss/down-regulation of MHC-I expression. Natural killer (NK) cells have the potential to function as essential effector cells for eliminating melanomas. Cyclic di-GMP (c-di-GMP), a ligand of the stimulator of interferon genes (STING) signal pathway, can be thought of as a new class of adjuvant against cancer. However, it is yet to be tested, because technologies for delivering c-di-GMP to the cytosol are required. Herein, we report that c-di-GMP efficiently activates NK cells and induces antitumor effects against malignant melanomas when loaded in YSK05 lipid containing liposomes, by assisting in the efficient delivery of c-di-GMP to the cytosol. The intravenous administration of c-di-GMP encapsulated with-in YSK05-liposomes (c-di-GMP/YSK05-Lip) into mice efficiently induced the production of type I interferon (IFN) as well as the activation of NK cells, resulting in a significant antitumor effect in a lung metastasis mouse model using B16-F10. This antitumor effect was dominated by NK cells. The infiltration of NK cells was observed in the lungs with B16-F10 melanomas. These findings indicate that the c-di-GMP/YSK05-Lip induces MHC-I nonrestricted antitumor immunity mediated by NK cells. Consequently, c-di-GMP/YSK05-Lip represents a potentially new adjuvant system for use in immunotherapy against malignant melanomas. (C) 2015 Elsevier B.V. All rights reserved.
Rights: © 2015, Elsevier. This manuscript version is made available under the CC-BY-NC-ND 4.0 license
Type: article (author version)
Appears in Collections:薬学研究院 (Faculty of Pharmaceutical Sciences) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 中村 孝司

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