title: Antitumor adaptive immunity remains intact following inhibition of autophagy and antimalarial treatment.
abstract: The rising success of cancer immunotherapy has produced immense interest in defining the clinical contexts that may benefit from this therapeutic approach. To this end, there is a need to ascertain how the therapeutic modulation of intrinsic cancer cell programs influences the anticancer immune response. For example, the role of autophagy as a tumor cell survival and metabolic fitness pathway is being therapeutically targeted in ongoing clinical trials that combine cancer therapies with antimalarial drugs for the treatment of a broad spectrum of cancers, many of which will likely benefit from immunotherapy. However, our current understanding of the interplay between autophagy and the immune response remains incomplete. Here, we have evaluated how autophagy inhibition impacts the antitumor immune response in immune-competent mouse models of melanoma and mammary cancer. We observed equivalent levels of T cell infiltration and function within autophagy-competent and -deficient tumors, even upon treatment with the anthracycline chemotherapeutic doxorubicin. Similarly, we found equivalent T cell responses upon systemic treatment of tumor-bearing mice with antimalarial drugs. Our findings demonstrate that antitumor adaptive immunity is not adversely impaired by autophagy inhibition in these models, allowing for the future possibility of combining autophagy inhibitors with immunotherapy in certain clinical contexts.
authors: Hanna
authors: H
authors: Starobinets
authors: Jordan
authors: J
authors: Ye
authors: Miranda
authors: M
authors: Broz
authors: Kevin
authors: K
authors: Barry
authors: Juliet
authors: J
authors: Goldsmith
authors: Timothy
authors: T
authors: Marsh
authors: Fanya
authors: F
authors: Rostker
authors: Matthew
authors: M
authors: Krummel
authors: Jayanta
authors: J
authors: Debnath
mesh_terms: D000818:Animals; D000962:Antimalarials / Q000494:pharmacology*; D001343:Autophagy / Q000187:drug effects* / Q000276:immunology; D045744:Cell Line, Tumor; D005260:Female; D007111:Immunity, Cellular / Q000187:drug effects*; D008325:Mammary Neoplasms, Experimental / Q000188:drug therapy / Q000276:immunology / Q000473:pathology; D008545:Melanoma / Q000188:drug therapy / Q000276:immunology / Q000473:pathology; D051379:Mice; D008822:Mice, Transgenic; D013601:T-Lymphocytes / Q000276:immunology* / Q000473:pathology
chemical_list: D000962:Antimalarials