Knowledge Tree
lymphocyte
Also known as: lymphocyte, lymphocytes
Facts (73)
Sources
The components of the immune system - Immunobiology - NCBI - NIH ncbi.nlm.nih.gov 36 facts
referencePeripheral lymphoid tissues provide sustaining signals to lymphocytes that do not encounter their specific antigen, ensuring their survival and continued recirculation.
claimDendritic cells are specialized to take up antigens and display them for recognition by lymphocytes.
accountAs recently as the early 1960s, textbooks described lymphocytes as having no known function.
claimNatural killer cells circulate in the blood as large lymphocytes containing distinctive cytotoxic granules.
claimNatural killer cells circulate in the blood as large lymphocytes containing distinctive cytotoxic granules.
accountAs recently as the early 1960s, textbooks described lymphocytes as having no known function.
claimLymphoid organs are categorized into central (primary) lymphoid organs, where lymphocytes are generated, and peripheral (secondary) lymphoid organs, where adaptive immune responses are initiated and lymphocytes are maintained.
referenceWhen an infection occurs, lymphocytes that recognize the infectious agent are arrested in the lymphoid tissue, where they proliferate and differentiate into effector cells to combat the infection.
referenceIn the spleen, lymphocytes surround the arterioles to form white pulp, which is divided into a periarteriolar lymphoid sheath (PALS) containing mainly T cells, and a flanking B-cell corona.
claimLymphocytes can mount a specific immune response against virtually any foreign antigen because each lymphocyte matures with a unique variant of a prototype antigen receptor.
claimWithin lymphoid organs, specialized cells such as mature dendritic cells display antigen to lymphocytes.
claimThere are two major types of lymphocytes: B lymphocytes, which mature in the bone marrow, and T lymphocytes, which mature in the thymus.
claimPeripheral lymphoid organs, which include the lymph nodes, the spleen, and the mucosal lymphoid tissues, are specialized to trap antigen, initiate adaptive immune responses, and provide signals that sustain recirculating lymphocytes.
claimLymphocytes continually recirculate through peripheral lymphoid tissues, where they encounter antigens carried from infection sites primarily within macrophages and dendritic cells.
claimThe common lymphoid progenitor is the precursor cell that gives rise to lymphocytes.
procedureAfter proliferation and differentiation, antigen-specific lymphocytes leave lymph nodes as effector cells through the efferent lymphatic vessel.
claimBronchial-associated lymphoid tissue (BALT) and mucosal-associated lymphoid tissue (MALT) are diffuse aggregates of lymphocytes that protect the respiratory and mucosal epithelium.
claimLymphocytes can mount a specific immune response against virtually any foreign antigen because each individual lymphocyte matures with a unique variant of an antigen receptor, creating a diverse collective repertoire.
referenceThe mucosal immune system is estimated to contain as many lymphocytes as all the rest of the body, and these lymphocytes form a specialized set of cells.
referenceA pluripotent hematopoietic stem cell gives rise to lymphocytes responsible for adaptive immunity, as well as myeloid lineages that participate in both innate and adaptive immunity.
claimPeripheral lymphoid organs are specialized to trap antigen, allow the initiation of adaptive immune responses, and provide signals that sustain recirculating lymphocytes.
claimThe spleen is composed of red pulp, which serves as the site of red blood cell disposal, and white pulp, which consists of lymphocytes surrounding arterioles.
claimLymphocytes remain functionally inactive until they encounter an antigen, which triggers their proliferation and differentiation into specialized functional states.
claimLymphoid organs are organized tissues containing large numbers of lymphocytes within a framework of nonlymphoid cells, where interactions between these cell types support lymphocyte development, the initiation of adaptive immune responses, or lymphocyte sustenance.
claimLymphoid organs are organized tissues that contain large numbers of lymphocytes within a framework of nonlymphoid cells.
claimLymphocytes are small, featureless cells with few cytoplasmic organelles and inactive nuclear chromatin in their resting state.
referenceIn Peyer's patches, lymphocytes form a follicle consisting of a large central dome of B lymphocytes surrounded by smaller numbers of T lymphocytes.
claimThe common lymphoid progenitor gives rise to lymphocytes.
claimWithin lymphoid organs, specialized cells such as mature dendritic cells display antigens to lymphocytes.
measurementThe mucosal immune system is estimated to contain as many lymphocytes as the rest of the body.
claimMost lymphocytes are small, featureless cells with few cytoplasmic organelles and inactive nuclear chromatin, which is typical of inactive cells.
claimThe peripheral lymphoid organs, which include the lymph nodes, the spleen, and the mucosal lymphoid tissues, are the sites where antigen and lymphocytes encounter each other.
claimLymphoid organs are categorized into central (primary) lymphoid organs, where lymphocytes are generated, and peripheral (secondary) lymphoid organs, where adaptive immune responses are initiated and lymphocytes are maintained.
claimDendritic cells are specialized to take up antigen and display it for recognition by lymphocytes.
referencePeripheral lymphoid tissues operate by trapping antigens from sites of infection and presenting them to migratory small lymphocytes to induce adaptive immune responses.
claimMature lymphocytes continually recirculate from the bloodstream through peripheral or secondary lymphoid organs and return to the bloodstream via lymphatic vessels.
Immunity In Depth | Linus Pauling Institute lpi.oregonstate.edu 12 facts
claimPatients with diagnosed vitamin B12 deficiency, such as pernicious anemia or megaloblastic anemia, exhibit suppressed natural killer cell activity and decreased numbers of circulating lymphocytes.
claimImmunomodulatory effects caused by vitamin B12 deficiency, such as suppressed natural killer cell activity and decreased lymphocyte counts, are corrected by treating the vitamin deficiency.
claimHelper T cells enhance immune responses and aid in the function of other lymphocytes.
claimVitamin C stimulates the production and function of leukocytes (white blood cells), specifically neutrophils, lymphocytes, and phagocytes.
measurementIn a study of older adults with a mean age of 70 years, supplementation with 200 mg/day of all-rac-alpha-tocopherol (equivalent to 100 mg of RRR-alpha-tocopherol) for three months significantly improved natural killer (NK) cytotoxic activity, neutrophil chemotaxis, phagocytic response, mitogen-induced lymphocyte proliferation, and interleukin-2 (IL-2) production compared to baseline.
claimCell-mediated immunity is carried out by T cells, which are lymphocytes that develop in the thymus.
claimPyridoxine supplementation affects lymphocyte responses in elderly persons, as reported in a 1987 study by Talbott et al. in the American Journal of Clinical Nutrition.
claimNeutrophils, mononuclear phagocytes, and lymphocytes accumulate vitamin C to high concentrations, which protects these immune cell types from oxidative damage.
claimZinc deficiency compromises adaptive immune function, specifically reducing the number and function of lymphocytes.
claimNeutrophils, which attack foreign bacteria and viruses, are the primary immune cell type stimulated by vitamin C, though lymphocytes and other phagocytes are also affected.
referencePanush RS, Delafuente JC, Katz P, and Johnson J published a study in 1982 in the International Journal for Vitamin and Nutrition Research Supplement regarding the modulation of immunologic responses by vitamin C, specifically noting the potentiation of in vitro and in vivo lymphocyte responses.
claimVitamin B6 deficiency impairs aspects of adaptive immunity, including both humoral and cell-mediated immunity, specifically affecting lymphocyte proliferation, differentiation, and maturation, as well as cytokine and antibody production.
How the Immune System Works with Primary Immunodeficiency igcares.com 6 facts
claimB-cells are lymphocytes that arise in the bone marrow and differentiate into plasma cells, which produce immunoglobulins (antibodies).
claimTonsils are collections of lymphocytes located in the throat.
claimHelper T-cells are specialized lymphocytes that mature in the thymus and assist other T-cells and B-cells in performing their functions.
claimCytotoxic T-cells are "killer" lymphocytes that mature in the thymus and are responsible for destroying infected cells.
claimThe thymus is an organ located in the chest that instructs immature lymphocytes to become mature T-lymphocytes.
claimThe immune system consists of white blood cells categorized as lymphocytes (T-cells, B-cells, and NK cells), neutrophils, and monocytes/macrophages.
Human body systems: Overview, anatomy, functions | Kenhub kenhub.com 5 facts
claimLymph nodes are masses of lymphocyte-containing lymphoid tissues attached to lymphoid vessels that function to filter cellular debris, foreign pathogens, excess tissue fluid, and leaked plasma proteins.
claimLymphatic system organs are categorized into primary and secondary organs, where primary organs produce lymphocytes and release them into lymphatic vessels.
claimThe lymphatic system is a network of lymphatic vessels that drains excess tissue fluid (lymph) from the intercellular fluid compartment, filters it through lymph nodes, exposes it to lymphocytes of the immune system, and returns the fluid to the circulatory system.
claimPrimary lymphatic organs, which include the thymus and red bone marrow, produce lymphocytes and release them into lymphatic vessels.
claimLymph nodes are masses of lymphocyte-containing lymphoid tissues that are attached to lymphoid vessels.
Pro-Inflammatory Cytokines Overview | Thermo Fisher Scientific - US thermofisher.com 4 facts
claimChemokines regulate the movement and localization of lymphocytes and a subset of dendritic cells.
claimIL-1β is a potent pro-inflammatory cytokine induced primarily by lymphocytes, macrophages, and monocytes in response to microbial molecules.
claimTumor Necrosis Factor-alpha (TNF-α) plays a crucial role in the early response against viral infection by enhancing the infiltration of lymphocytes to the site of infection.
claimCXC chemokines are primarily involved in recruiting immune cells to sites of inflammation and mediating homeostatic migration and homing of lymphocytes.
The immune system and primary immunodeficiency primaryimmune.org 3 facts
claimThe 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.
claimThe 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.
claimDuring T cell development in the thymus, immature lymphocytes mature into T cells, and T cells with the potential to attack normal tissues are eliminated.
What are Cytokines? Types & Function - Cleveland Clinic my.clevelandclinic.org Jan 3, 2023 2 facts
The Role of Immune Cells in Inflammation jmolpat.com 2 facts
3. The Innate Immune System - Immunopaedia immunopaedia.org.za 1 fact
claimNatural killer (NK) cells are large granular lymphocytes derived from bone marrow precursors that are found mainly in peripheral circulation (5 to 20 percent of total lymphocytes), spleen, liver, and bone marrow.
Parts of the Immune System | Children's Hospital of Philadelphia chop.edu 1 fact
claimThe adaptive immune system is comprised of two types of lymphocytes: B cells and T cells.
Comparison of Traditional Indigenous Diet and Modern Industrial ... isom.ca Feb 26, 2024 1 fact
claimMammals that synthesize their own Ascorbic Acid (AA) have the highest concentrations in the adrenals, pituitary, brain, liver, lung, and thyroid, while humans have the highest concentrations in lymphocytes, monocytes, pituitary, adrenals, eye lens, and brain.