Nutrition deprivation affects the cytotoxic effect of CD8 T cells in hepatocellular carcinoma |
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Authors: | Chun-Ye Zhang Shuai Liu Ming Yang |
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Institution: | Chun-Ye Zhang, Department of Veterinary Pathobiology, University of Missouri, Columbia, MO 65211, United StatesShuai Liu, The First Affiliated Hospital, Zhejiang University, Hangzhou 310006, Zhejiang Province, ChinaMing Yang, Department of Surgery, University of Missouri, Columbia, MO 65211, United States |
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Abstract: | Hepatocellular carcinoma (HCC) is the most common type of liver cancer and the third leading cause of cancer-related death worldwide. Factors including carcinogens, infection of hepatitis viruses, alcohol abuse, and metabolic disorders such as non-alcoholic fatty liver disease mainly contribute to HCC initiation and progression. Immunotherapy is one of the most powerful tools for unresectable HCC treatment in patients. CD8+ T cells are a major immune component in the tumor microenvironment with cytotoxic effects against cancer cells. However, these CD8+ T cells commonly display an exhaustion phenotype with high expression of programmed cell death protein 1, T-cell immunoglobulin and mucin-domain containing-3, and/or lymphocyte-activation gene 3, producing low levels of perforin (PRF1) and granzyme B (GZMB), as well as anti-tumor cytokines, such as interferon gamma and tumor necrosis factor alpha. In the referenced study, the authors also showed that deprivation of glutamine decreased the antitumor function of CD8+ T cells, as well as the production of PRF1 and GZMB. However, the role of each amino acid in T cell function and exhaustion may depend on tumor type and tumor microenvironment, including the source of other nutrients. Overall, amino acids or other nutrient metabolites in the tumor microenvironment play a pivotal role in both tumor growth and immune response. |
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Keywords: | Hepatocellular carcinoma Metabolism Amino acids Tumor microenvironment T cell function |
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| 点击此处可从《World journal of gastrointestinal oncology》浏览原始摘要信息 |
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