biostudies-literatureGowan CCNIAID NIH HHSNCI NIH HHS1-4https://www.ebi.ac.uk/biostudies/studies/S-EPMC9783015biostudies-literatureUnknown46(1)T-cell immunoglobulin and mucin domain 3 (TIM3) is emerging as a potential target for antibody-based checkpoint blockade. However, the efficacy of TIM3 blockade in combination with other treatment modalities, has not been extensively studied. In the current work we combined TIM3 blockade with myxoma virus-based oncolytic virotherapy (OV). Our results demonstrate that myxoma virus's ability to initiate an immense antitumor immune response complements the ability of TIM3 blockade to shift the tumor microenvironment to a more proinflammatory state. As a result, the combination of TIM3 blockade and OV is able to completely eradicate established disease, while neither monotherapy is effective. These data represent the first demonstration that OV can enhance the efficacy of TIM3 blockade and sugJournal of immunotherapy (Hagerstown, Md. : 1997)The Combination of TIM3-Based Checkpoint Blockade and Oncolytic Virotherapy Regresses Established Solid Tumors.PMC9783015P30 CA138313R01 CA194090R21 AI142387K22 AI095372Baillie KBartee EAksoy BAGowan CCTempleton CBartee MYHappe MFlores EfalseThe Combination of TIM3-Based Checkpoint Blockade and Oncolytic Virotherapy Regresses Established Solid Tumors.T-cell immunoglobulin and mucin domain 3 (TIM3) is emerging as a potential target for antibody-based checkpoint blockade. However, the efficacy of TIM3 blockade in combination with other treatment modalities, has not been extensively studied. In the current work we combined TIM3 blockade with myxoma virus-based oncolytic virotherapy (OV). Our results demonstrate that myxoma virus's ability to initiate an immense antitumor immune response complements the ability of TIM3 blockade to shift the tumor microenvironment to a more proinflammatory state. As a result, the combination of TIM3 blockade and OV is able to completely eradicate established disease, while neither monotherapy is effective. These data represent the first demonstration that OV can enhance the efficacy of TIM3 blockade and sug2023-01-01T00:00:00Z2023 Jan2025-04-04T14:12:44.543Z2025-04-04T14:12:44.543ZS-EPMC97830153647258110.1097/cji.000000000000044410.1097/CJI.0000000000000444