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Chem Commun (Camb) ; 57(4): 504-507, 2021 Jan 14.
Article in English | MEDLINE | ID: covidwho-983835

ABSTRACT

A novel STING agonist, CDGSF, ipsilaterally modified with phosphorothioate and fluorine, was synthesized. The phosphorothioate in CDGSF might be a site for covalent conjugation. Injection of CDGSF generated an immunogenic ("hot") tumor microenvironment to suppress melanoma, more efficiently than dithio CDG. In particular, immunization with SARS-CoV-2 spike protein using CDGSF as an adjuvant elicited an exceptionally high antibody titer and a robust T cell response, overcoming the drawbacks of aluminum hydroxide. These results highlighted the therapeutic potential of CDGSF for cancer immunotherapy and the adjuvant potential of the STING agonist in the SARS-CoV-2 vaccine for the first time.


Subject(s)
Adjuvants, Immunologic/administration & dosage , COVID-19 Vaccines/administration & dosage , COVID-19/prevention & control , Melanoma, Experimental/drug therapy , Membrane Proteins/agonists , Nucleotides, Cyclic/administration & dosage , Skin Neoplasms/drug therapy , Adjuvants, Immunologic/chemical synthesis , Aluminum Hydroxide/administration & dosage , Aluminum Hydroxide/chemistry , Animals , Antibodies, Viral/biosynthesis , B-Lymphocytes/drug effects , B-Lymphocytes/immunology , B-Lymphocytes/virology , COVID-19/immunology , COVID-19/virology , COVID-19 Vaccines/chemistry , Enzyme-Linked Immunospot Assay , Humans , Immunotherapy/methods , Interferon-gamma/biosynthesis , Melanoma, Experimental/immunology , Melanoma, Experimental/mortality , Melanoma, Experimental/pathology , Membrane Proteins/genetics , Membrane Proteins/immunology , Mice , Nucleotides, Cyclic/chemical synthesis , SARS-CoV-2/drug effects , SARS-CoV-2/immunology , SARS-CoV-2/pathogenicity , Skin Neoplasms/immunology , Skin Neoplasms/mortality , Skin Neoplasms/pathology , Spike Glycoprotein, Coronavirus/administration & dosage , Spike Glycoprotein, Coronavirus/chemistry , Spike Glycoprotein, Coronavirus/immunology , Survival Analysis , T-Lymphocytes/drug effects , T-Lymphocytes/immunology , T-Lymphocytes/virology , Tumor Burden/drug effects , Tumor Microenvironment/drug effects , Tumor Microenvironment/immunology , Vaccination/methods
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