Research Progress of Histone Deacetylase Inhibitor Combined with Immune Checkpoint Inhibitor in the Treatment of Tumor

Abstract

免疫治疗是目前抗肿瘤治疗的主要策略之一，其中免疫检查点抑制剂（immune checkpoint inhibitors, ICIs）是研究应用最为广泛的一类药物。ICIs耐药由多种细胞因子及免疫细胞介导，机制复杂，是造成癌症患者免疫治疗失败的主要原因。组蛋白去乙酰化酶抑制剂（histone deacetylase inhibitor, HDACi）作为一类表观遗传调控药物，在调控细胞周期、增殖分化及活性中发挥重要作用。近年来，研究发现HDACi不仅能够调节细胞生物学特征，还与肿瘤ICIs耐药的改善密切相关。因此，HDACi提高ICIs疗效的相关机制研究对肿瘤免疫治疗具有重要意义。本文将对HDACi联合ICIs治疗恶性肿瘤及相关机制的研究进展做一综述。

Immunotherapy is one of the main strategies of anti-tumor therapy at present, in which immune checkpoint inhibitors (ICIs) are the most widely used drug. ICIs resistance is mediated by a variety of cytokines and immune cells, and the mechanism is complex, which is the main reason for the failure of immunotherapy in cancer patients. Histone deacetylase inhibitor (HDACi), as a class of epigenetic regulatory drugs, plays an important role in regulating cell cycle, proliferation, differentiation, and activity. In recent years, Studies have found that HDACi can not only regulate cell biological characteristics, but also closely related to the improvement of tumor ICIs drug resistance. Therefore, the study on how HDACi enhances the efficacy of ICIs is of great significance to tumor immunotherapy. This article will review the research progress of HDACi combined with ICIs in treating malignant tumors and their related mechanism.