Soluble PD-1 Facilitates 4-1BBL–Triggered Antitumor Immunity against Murine H22 Hepatocarcinoma In vivo

Abstract
Purpose: The use of costimulatory molecules targeting distinct T-cell signaling pathways has provided a means for triggering and enhancing antitumor immunity; however, it is still not fully understood what types of costimulatory molecules are suitable for the combination in tumor therapy. Our purpose in this study is to establish an effective antitumor immune approach by using costimulatory molecule 4-1BBL in combination with soluble PD-1.