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Chinese Archives of General Surgery(Electronic Edition) ›› 2023, Vol. 17 ›› Issue (06): 462-465. doi: 10.3877/cma.j.issn.1674-0793.2023.06.014

• Review • Previous Articles     Next Articles

Progress of microsatellite stability state and PD-1/PD-L1/IDO in colorectal carcinoma

Dechen Wang, Kang Yang, Zijie Yang, Mingbin Gui, Lianping Qu, Xiaofeng Zhang, Feng Gao()   

  1. Ningxia Medical University, Yinchuan 750004, China; Department of Colorectal and Anal Surgery, the 940th Hospital of Joint Logistics Support Force of Chinese People’s Liberation Army, Lanzhou 730050, China
    Department of Colorectal and Anal Surgery, the 940th Hospital of Joint Logistics Support Force of Chinese People’s Liberation Army, Lanzhou 730050, China
    Department of Colorectal and Anal Surgery, the 940th Hospital of Joint Logistics Support Force of Chinese People’s Liberation Army, Lanzhou 730050, China; Gansu University of Chinese Medicine, Lanzhou 730000, China
  • Received:2023-01-17 Online:2023-12-01 Published:2023-12-05
  • Contact: Feng Gao

Abstract:

In addition to radical surgical resection and chemo-radiotherapy, immunotherapy has become a hot research field for the treatment of colorectal cancer (CRC) in recent years. With the in-depth study of the immune microenvironment and the development of molecular biology techniques, programmed death receptor 1 (PD-1) inhibitors nivolumab and pembrolizumab have been approved for CRC patients with microsatellite instability (MSI). PD-1 inhibitors block the PD-1/ programmed death ligand 1 (PD-L1) pathway to prevent tumor cell immune escape, ultimately killing tumor cells. Indoleamine 2,3-dioxygenase (IDO) is an enzyme that breaks down tryptophan into kynurenine, and its downstream metabolites play an important role in the immune microenvironment. IDO and PD-1/PD-L1 play key roles in tumor immune escape. This review explores the relationship between IDO and PD-1/PD-L1 in tumor immune escape, as well as the interplay between immune checkpoints and mismatch repair genes. Furthermore, the relationship between microsatellite status and the expression of PD-1/PD-L1 and IDO requires further research and validation, to guide cancer immunotherapy and improve patient survival quality and life expectancy.

Key words: Colorectal neoplasms, Immunotherapy, Mismatch repair genes, Programmed death receptor 1, Programmed death ligand 1, Indoleamine 2,3-dioxygenase

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