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Background: Hepatocellular carcinoma is the most common and deadliest form of primary liver tumors with limited treatment options.Nowadays, immunotherapy becomes a hot spot in liver cancer studies such as vaccine or immune cells related treatment.Lmdd-MPFG (LM) is a recombinant attenuated Listeria vaccine constructed in our previous study,which has potency to induce strong and specific antitumor cellular immunity to HCC.As the most powerful antigenpresenting cells, Dendritic cells (DCs) play an essential role in Lm infection.However, the Lm vaccine utilizes DCs to enhance antitumor immunity and the probable mechanisms have not been described.