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The vast majority of primary hepatocellular cancer is hepatocellular carcinomas (HCCs). Currently, HCC is one of the more common cancers in humans, and it has a high mortality and disability rate. Mitoxantrone (MTX) is an antitumor drug that can block type II topoisomerase. It has been reported that immunogenic cell death evoked by MTX can induce the discharge of damage associated with molecular patterns (DAMPs) and subsequently influence immune cell infiltration in the tumor microenvironment. High mobilities aggregation box 1 (HMGB1) is the prototypical extracellular DAMP. Many cellular processes have been reported to involve EPHB4 receptor tyrosine kinases, but the relation of DAMP and EPHB4 is uncertain. In this research, we assessed the impact of miR-130-3p by Edu incorporation test on cell proliferation, and we have proven its impact on HCC cell migration through Transwell and wound healing tests. Flow cytometry was applied to study its influence on apoptosis. Luciferase report test was integrated in detecting the miR-130-3p target gene. The influence of miR-130-3p on the manifestation of classical DAMPs was studied, such as HMGB1, ATP, and Calreticulin. A coculture experiment was carried out to further confirm its effects on immune cell infiltration. The result displayed that miR-130-3p overexpression considerably facilitates apoptosis and suppresses the migration or proliferation of HCC cells. EPHB4 was confirmed as the target gene of miR-130-3p. Overexpression of this target gene promotes emission of Calreticulin, ATP, and HMGB1 and subsequently promotes DCs maturation and proliferation of CD4+ T cells. In summary, our results demonstrated that miR-130-3p inhibits HCC cell proliferation and migration by targeting EPHB4 and promotes drug-induced immunogenic cell death.

miR-130-3p Promotes MTX-Induced Immune Killing of Hepatocellular Carcinoma Cells by Targeting EPHB4