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CD146 Antigen
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D051929 |
[A cell adhesion molecule of the immunoglobulin superfamily that is expressed by ENDOTHELIAL CELLS where it functions to stabilize INTERCELLULAR JUNCTIONS. It is also highly expressed by melanoma tumor cells and may facilitate their METASTASIS.
] |
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CD18 Antigens
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D018821 |
[Cell-surface glycoprotein beta-chains that are non-covalently linked to specific alpha-chains of the CD11 family of leukocyte-adhesion molecules (RECEPTORS, LEUKOCYTE-ADHESION). A defect in the gene encoding CD18 causes LEUKOCYTE-ADHESION DEFICIENCY SYNDROME.
] |
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CD2 Antigens
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D018801 |
[Glycoprotein members of the immunoglobulin superfamily which participate in T-cell adhesion and activation. They are expressed on most peripheral T-lymphocytes, natural killer cells, and thymocytes, and function as co-receptors or accessory molecules in the T-cell receptor complex.
] |
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CD24 Antigen
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D051927 |
[A GPI-linked cell adhesion protein originally identified as a heat stable antigen in mice. It mediates antigen-dependent activation and proliferation of B-CELLS. It is also involved in METASTASIS and is highly expressed in many NEOPLASMS.
] |
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CD27 Ligand
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D053282 |
[A transmembrane protein belonging to the tumor necrosis factor superfamily that specifically binds to CD27 ANTIGEN. It is found on activated T-LYMPHOCYTES; B-LYMPHOCYTES; and DENDRITIC CELLS where it plays a role in stimulating the proliferation of CD4-POSITIVE T-LYMPHOCYTES and CD8-POSITIVE T-LYMPHOCYTES.
] |
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CD28 Antigens
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D018106 |
[Costimulatory T-LYMPHOCYTE receptors that have specificity for CD80 ANTIGEN and CD86 ANTIGEN. Activation of this receptor results in increased T-cell proliferation, cytokine production and promotion of T-cell survival.
] |
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CD3 Complex
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D017252 |
[Complex of at least five membrane-bound polypeptides in mature T-lymphocytes that are non-covalently associated with one another and with the T-cell receptor (RECEPTORS, ANTIGEN, T-CELL). The CD3 complex includes the gamma, delta, epsilon, zeta, and eta chains (subunits). When antigen binds to the T-cell receptor, the CD3 complex transduces the activating signals to the cytoplasm of the T-cell. The CD3 gamma and delta chains (subunits) are separate from and not related to the gamma/delta chains of the T-cell receptor (RECEPTORS, ANTIGEN, T-CELL, GAMMA-DELTA).
] |
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CD30 Ligand
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D053285 |
[A membrane-bound tumor necrosis family member found primarily on activated T-LYMPHOCYTES that binds specifically to CD30 ANTIGEN. It may play a role in INFLAMMATION and immune regulation.
] |
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CD36 Antigens
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D018955 |
[Leukocyte differentiation antigens and major platelet membrane glycoproteins present on MONOCYTES; ENDOTHELIAL CELLS; PLATELETS; and mammary EPITHELIAL CELLS. They play major roles in CELL ADHESION; SIGNAL TRANSDUCTION; and regulation of angiogenesis. CD36 is a receptor for THROMBOSPONDINS and can act as a scavenger receptor that recognizes and transports oxidized LIPOPROTEINS and FATTY ACIDS.
] |
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CD4 Antigens
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D015704 |
[55-kDa antigens found on HELPER-INDUCER T-LYMPHOCYTES and on a variety of other immune cell types. They are members of the immunoglobulin supergene family and are implicated as associative recognition elements in MAJOR HISTOCOMPATIBILITY COMPLEX class II-restricted immune responses. On T-lymphocytes they define the helper/inducer subset. T4 antigens also serve as INTERLEUKIN-15 receptors and bind to the HIV receptors, binding directly to the HIV ENVELOPE PROTEIN GP120.
] |
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CD4 Immunoadhesins
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D016860 |
[Chimeric molecules resulting from the fusion of recombinant soluble CD4 to the Fc portion of immunoglobulins. These have potential use in the therapy of AIDS since they possess both the gp120-binding and HIV-blocking properties of rCD4 as well as the long plasma half-life and Fc receptor-binding functions of immunoglobulin.
] |
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CD4 Lymphocyte Count
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D018791 |
[The number of CD4-POSITIVE T-LYMPHOCYTES per unit volume of BLOOD. Determination requires the use of a fluorescence-activated flow cytometer.
] |
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CD4-CD8 Ratio
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D016516 |
[Ratio of T-LYMPHOCYTES that express the CD4 ANTIGEN to those that express the CD8 ANTIGEN. This value is commonly assessed in the diagnosis and staging of diseases affecting the IMMUNE SYSTEM including HIV INFECTIONS.
] |
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CD4-Positive T-Lymphocytes
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D015496 |
[A critical subpopulation of T-lymphocytes involved in the induction of most immunological functions. The HIV virus has selective tropism for the T4 cell which expresses the CD4 phenotypic marker, a receptor for HIV. In fact, the key element in the profound immunosuppression seen in HIV infection is the depletion of this subset of T-lymphocytes.
] |
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CD40 Antigens
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D019013 |
[Members of the tumor necrosis factor receptor superfamily with specificity for CD40 LIGAND. They are found on mature B-LYMPHOCYTES, some EPITHELIAL CELLS; and lymphoid DENDRITIC CELLS. Evidence suggests that CD40-dependent activation of B-cells is important for generation of memory B-cells within the germinal centers. Mutations in the CD40 antigen gene result in HYPER-IGM IMMUNODEFICIENCY SYNDROME, TYPE 3. Signaling of the receptor occurs through its association with TNF RECEPTOR-ASSOCIATED FACTORS.
] |
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CD40 Ligand
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D023201 |
[A membrane glycoprotein and differentiation antigen expressed on the surface of T-cells that binds to CD40 ANTIGENS on B-LYMPHOCYTES and induces their proliferation. Mutation of the gene for CD40 ligand is a cause of HYPER-IGM IMMUNODEFICIENCY SYNDROME, TYPE 1.
] |
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CD47 Antigen
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D051928 |
[A ubiquitously expressed membrane glycoprotein. It interacts with a variety of INTEGRINS and mediates responses to EXTRACELLULAR MATRIX PROTEINS.
] |
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CD48 Antigen
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D000071178 |
[A 40-45 KDa GPI-linked protein in the SLAM family that consists of two IMMUNOGLOBULIN C2-SET DOMAINS. It is expressed on the surface of a variety of cells with immune functions, including THYMOCYTES; mature B-LYMPHOCYTES and T-LYMPHOCYTES; NATURAL KILLER CELLS; DENDRITIC CELLS; MAST CELLS; and EOSINOPHILS. It binds to CD2 and 2B4 (CD244) receptors to activate and modulate the immunologic response.
] |
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CD5 Antigens
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D018956 |
[Glycoproteins expressed on all mature T-cells, thymocytes, and a subset of mature B-cells. Antibodies specific for CD5 can enhance T-cell receptor-mediated T-cell activation. The B-cell-specific molecule CD72 is a natural ligand for CD5. (From Abbas et al., Cellular and Molecular Immunology, 2d ed, p156)
] |
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CD52 Antigen
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D000074301 |
[A small GPI-linked glycoprotein expressed on the surface of normal and malignant B-CELLS; T-CELLS; MONOCYTES; MACROPHAGES; NK CELLS; and GRANULOCYTES. It is expressed densely and without modulation in many malignant T-cell neoplasms and therefore a target for antibody therapies (e.g., ALEMTUZUMAB).
] |
