期刊
FRONTIERS IN IMMUNOLOGY
卷 13, 期 -, 页码 -出版社
FRONTIERS MEDIA SA
DOI: 10.3389/fimmu.2022.812774
关键词
toll-like receptors; cell-mediated immunity; T cells; signaling pathway; infectious diseases; autoimmune diseases; cancer
类别
资金
- NCI, NIH [R01CA101795, R01CA246547, U54CA210181]
- Department of Defense (DoD) CDMRP BCRP [BC151081, LC200368]
- CDMRP [BC151081, 893187] Funding Source: Federal RePORTER
This article provides a detailed overview of the innate immune system's defense mechanisms against pathogens, with a focus on the role of Toll-like receptors (TLRs) in immune responses. TLRs not only link innate immunity to adaptive immunity, but also directly regulate the function of T cells. In addition, the article discusses the critical role of TLR signaling in host defense against infectious diseases, autoimmune diseases, and cancer.
Innate immunity is the first defense system against invading pathogens. Toll-like receptors (TLRs) are well-defined pattern recognition receptors responsible for pathogen recognition and induction of innate immune responses. Since their discovery, TLRs have revolutionized the field of immunology by filling the gap between the initial recognition of pathogens by innate immune cells and the activation of the adaptive immune response. TLRs critically link innate immunity to adaptive immunity by regulating the activation of antigen-presenting cells and key cytokines. Furthermore, recent studies also have shown that TLR signaling can directly regulate the T cell activation, growth, differentiation, development, and function under diverse physiological conditions. This review provides an overview of TLR signaling pathways and their regulators and discusses how TLR signaling, directly and indirectly, regulates cell-mediated immunity. In addition, we also discuss how TLR signaling is critically important in the host's defense against infectious diseases, autoimmune diseases, and cancer.
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