2023年1月17日 · T cells are a type of white blood cell that help your immune system fight germs and protect you from disease. There are two main types: cytotoxic and helper T cells.

T cells are one of the important types of white blood cells of the immune system and play a central role in the adaptive immune response. T cells can be distinguished from other lymphocytes by the presence of a T-cell receptor (TCR) on their cell surface. T cells are born from hematopoietic stem cells, [1] found in the bone marrow.

2025年1月17日 · T cell, type of leukocyte (white blood cell) that is an essential part of the immune system. T cells are one of two primary types of lymphocytes—B cells being the second type—that determine the specificity of immune responses to antigens (foreign substances) in the body.

2025年1月16日 · Upon activation, helper T cells secrete a variety of cytokines that influence the activity of other immune cells, such as B cells, cytotoxic T cells, and macrophages. These cytokines can promote the proliferation and differentiation of B cells into antibody-producing plasma cells, enhance the cytotoxic activity of CD8+ T cells, and activate ...

2025年1月10日 · T cells, also known as T lymphocytes, are the immune cells that drive the cellular immune response. There are several different types of T cells, each playing a distinct role. The functions of T cells include killing pathogens and damaged cells, moderating the immune response and facilitating the actions of other immune cells.

2024年9月17日 · Function: Helper T cells coordinate the immune response by releasing cytokines that stimulate other immune cells, including B cells and cytotoxic T cells. Activation: These cells bind to antigens presented by MHC class II molecules on antigen-presenting cells (APCs).

2020年8月24日 · Thymus- derived lymphocytes (commonly known as T cells) are cells in the adaptive immune system that attack invading pathogens and infected host cells depending on the T cell type activated. There are two major types of T cells: CD8+ and CD4+.

2023年9月26日 · T cells (also called T lymphocytes) are major components of the adaptive immune system. Their roles include directly killing infected host cells, activating other immune cells, producing cytokines, and regulating the immune response. This article discusses T cell production, the different T cell types, and relevant clinical conditions.

2025年1月22日 · Regulatory T cells participate in peripheral tolerance by inhibiting the activation and function of self-reactive T cells and by secreting anti-inflammatory cytokines. It is not completely understood what events specifically direct maturation of thymocytes into regulatory T cells. Current theories suggest the critical events may occur during ...

There are several subsets of T-cells, such as cytotoxic T-cells, regulatory T-cells, helper T-cells and natural killer T-cells, with functions related to both innate and adaptive immunity.