期刊
AMERICAN JOURNAL OF CHINESE MEDICINE
卷 51, 期 7, 页码 1627-1651出版社
WORLD SCIENTIFIC PUBL CO PTE LTD
DOI: 10.1142/S0192415X2350074X
关键词
Traditional Chinese Medicine; Cancer Immunotherapy; Tumor Microenvironment; Immune Checkpoint; PD-1/PD-L1
The tumor microenvironment plays a crucial role in tumor development, and immune checkpoint-targeted drugs have shown unique advantages in cancer treatment. Traditional Chinese medicine has a positive impact on tumor immunotherapy by regulating immune cells, cytokines, and immune checkpoint molecules. Immunomodulatory stimulation with traditional Chinese medicine could be valuable for immunotherapy in patients with non-inflammatory or cold tumors.
The tumor microenvironment (TME) plays an important role in the development of tumors. Immunoregulatory cells and cytokines facilitate cancer cells to avoid immune surveillance. Overexpression of immune checkpoint molecules such as CTLA-4 and PD-1/PD-L1 inhibits immune function and enables cancer cells to avoid clearance by the immune system. Thus, minimizing tumor immunosuppression could be an important strategy for cancer therapy. Currently, many immune checkpoint-targeted drugs, such as PD-1/PD-L1 inhibitors, have been approved for marketing and have shown unique advantages in the clinical treatment of cancers. The concept of strengthening resistance to eliminate pathogenic factors in traditional Chinese medicine (TCM) is consistent with the immunotherapy of cancer. According to previous studies, the role of TCM in tumor immunotherapy is mainly associated with the positive regulation of natural killer cells, CD8/CD4 T cells, dendritic cells, M2 macrophages, interleukin-2, tumor necrosis factor-alpha, and IFN-gamma, as well as with the negative regulation of Tregs, myeloid-derived suppressor cells, cancer-associated fibroblasts, PD-1/PD-L1, transforming growth factor-beta, and tumor necrosis factor-beta. This paper summarizes the current research on the effect of TCM targeting the TME, and further introduces the research progress on studying the effects of TCM on immune checkpoints. Modern pharmacological studies have demonstrated that TCM can directly or indirectly affect the TME by inhibiting the overexpression of immune checkpoint molecules and enhancing the efficacy of tumor immunotherapy. TCM with immunomodulatory stimulation could be the key factor to achieve benefits from immunotherapy for patients with non-inflammatory, or cold, tumors.
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