T cells

B cells

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• Germinal centers in B-cell follicles are sites where B cells undergo intense proliferation after encountering specific antigens and cooperating T cells.
• The adaptive immune system is comprised of two types of lymphocytes: B cells and T cells.
• IL-4 is classified as an adaptive immunity cytokine, is produced by Th cells, binds to the CD124 receptor, targets B cells, T cells, and macrophages, and functions in the proliferation of B and cytotoxic T cells, enhancement of MHC class II expression, and stimulation of IgG and IgE production.
• Germinal centers within B-cell follicles are sites where B cells undergo intense proliferation after encountering their specific antigen and cooperating T cells.
• IL-6 is produced by monocytes, fibroblasts, and endothelial cells, and upon stimulation, it is secreted by macrophages, T cells, B cells, mast cells, glial cells, eosinophils, keratinocytes, and granulocytes.
• Primary immunodeficiencies result from a defect in one or more elements or functions of the normal immune system, such as T cells, B cells, NK cells, neutrophils, monocytes, antibodies, cytokines, or the complement system.
• IL-2 is classified as an adaptive immunity cytokine, is produced by Th1 cells, binds to the CD25 receptor, targets activated T cells, B cells, and NK cells, and functions in the proliferation of B cells and activated T cells, and supports NK cell function.
• T lymphocytes (T cells) consist of two main classes: cytotoxic T cells, which kill virus-infected cells, and a second class that activates other cells such as B cells and macrophages.
• IL-10 is classified as an anti-inflammatory cytokine, is produced by T cells, B cells, and macrophages, binds to the CDw210 receptor, targets B cells and macrophages, and functions to inhibit cytokine production and mononuclear cell function.
• The most common cells of the immune system are lymphocytes (T cells, B cells, and NK cells), neutrophils, and monocytes/macrophages, all of which are types of white blood cells.
• T cells expressing the cell-surface protein CD4 are divided into two subsets: T helper (Th)1 cells, which are primarily involved in activating macrophages and inflammatory responses, and Th2 cells, which are primarily involved in stimulating antibody production by B cells.
• A small subset of B and T cells, known as memory cells, remain indefinitely after an infection and recognize specific antigens.
• Transforming growth factor-beta (TGF-β) is an anti-inflammatory cytokine produced by T cells and B cells that binds to TGF-βR1, 2, and 3, and acts on activated T and B cells to inhibit their proliferation, inhibit hematopoiesis, and promote wound healing.
• Memory cells are a small subset of B and T cells that remain indefinitely after an infection and recognize specific antigens.
• Helper T-cells are specialized lymphocytes that mature in the thymus and assist other T-cells and B-cells in performing their functions.
• Adaptive immune responses are initiated in peripheral lymphoid tissues, where T cells that encounter antigen proliferate and differentiate into antigen-specific effector cells, and B cells proliferate and differentiate into antibody-secreting cells.
• In peripheral lymphoid tissues, T cells that encounter antigen proliferate and differentiate into antigen-specific effector cells, while B cells proliferate and differentiate into antibody-secreting cells.
• Natural Killer (NK) cells contribute to the innate immune response by nonspecifically eliminating target cells, such as virus-infected or malignant cells, through apoptosis independently of T or B cells.
• T cells and B cells are the two primary cell types central to the adaptive immune response.
• IL-1 is classified as a pro-inflammatory cytokine, is produced by macrophages, B cells, and dendritic cells, binds to the CD121a receptor, targets B cells, NK cells, and T cells, and functions in pyrogenic activity, inflammation, cell proliferation, differentiation, and bone marrow cell proliferation.
• The bone marrow serves as a training ground for B-cells, and the thymus serves as a training ground for T-cells.
• The immune system consists of white blood cells categorized as lymphocytes (T-cells, B-cells, and NK cells), neutrophils, and monocytes/macrophages.
• While T-cells kill viruses, they also instruct B-cells to produce antibodies (immunoglobulin).
• The adaptive immune system involves T-cells and B-cells, which require training or education to learn not to attack the body's own cells.
• B cells that encounter antigen while migrating through a lymph node are arrested and activated with the assistance of activated T cells.
• Lymphocytes, including T cells and B cells, are involved in the inflammatory response.
• Natural Killer T (NKT) cells are considered part of the innate immune response because they act swiftly during infections to kill microorganisms or cells and produce cytokines without requiring the slower differentiation or proliferative processes associated with T and B cells.
• 1,25-dihydroxyvitamin D3 suppresses antibody production by B cells and inhibits the proliferation of T cells in vitro.

macrophages

Macrophages and T cells are both essential components of the immune system [1], [2] that interact through antigen presentation [3] and cytokine signaling [4], [5], [6]. They collaborate in immune responses, such as macrophage activation by T cells [7], [5], [6], and participate in feedback loops during processes like cytokine storms [8], [9]. — 18 supporting facts

thymus

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• Mature T cells leave the thymus as naïve T cells and populate organs such as the spleen, lymph nodes, bone marrow, and blood, where they may become memory T cells after antigen exposure.
• T cell development is dependent on the thymus, and T cells cannot develop if a fetus lacks a thymus.
• T cells develop from hematopoietic stem cells in the bone marrow and complete their development in the thymus, a specialized organ in the chest.
• Protein-energy malnutrition (PEM) leads to atrophy of the thymus, which reduces the number of circulating T cells and decreases the effectiveness of the memory response to antigens.
• Cell-mediated immunity is carried out by T cells, which are lymphocytes that develop in the thymus.
• Helper T-cells are specialized lymphocytes that mature in the thymus and assist other T-cells and B-cells in performing their functions.
• T cells develop from hematopoietic stem cells in the bone marrow and complete their development in the thymus.
• The thymus is a specialized organ of the immune system located in the chest where immature lymphocytes develop into mature T cells and T cells with the potential to attack normal tissues are eliminated.
• T cells travel from the bone marrow to the thymus via the bloodstream to mature.
• The bone marrow serves as a training ground for B-cells, and the thymus serves as a training ground for T-cells.
• During T cell development in the thymus, immature lymphocytes mature into T cells, and T cells with the potential to attack normal tissues are eliminated.

immune system

T cells are a fundamental component of the immune system, as they are classified as a type of white blood cell within it [1], [2]. They play critical roles in immune function, including fighting infections and regulating the immune system [3], [4], and their development occurs within the thymus, a specialized organ of the immune system [5]. — 7 supporting facts

neutrophils

Neutrophils and T cells are both classified as types of white blood cells within the immune system as stated in [1] and [2], and they are both components that can be affected by primary immunodeficiencies [3]. Additionally, they are both targeted by the pro-inflammatory cytokine IL-8 during chemotaxis [4]. — 4 supporting facts

inflammation

Inflammation and T cells are related because age-related changes in T cells lead to inflammation and increased disease susceptibility [1], T cells produce cytokines that promote tissue repair and regulate other immune cells in the context of inflammation [2], and pro-inflammatory cytokine IL-1 targets T cells while functioning in inflammation [3]. — 3 supporting facts

infection

T cells are directly involved in the immune response to an infection, as they are suppressed by regulatory T cells once an infection is controlled [1] and persist as memory cells after an infection has resolved [2], [3]. — 3 supporting facts