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  2. T cell - Wikipedia

    en.wikipedia.org/wiki/T_cell

    T cell exhaustion can be triggered by several factors like persistent antigen exposure and lack of CD4 T cell help. [64] Antigen exposure also has effect on the course of exhaustion because longer exposure time and higher viral load increases the severity of T cell exhaustion. At least 2–4 weeks exposure is needed to establish exhaustion. [65]

  3. T helper cell - Wikipedia

    en.wikipedia.org/wiki/T_helper_cell

    Interleukin 4 acts on helper T cells to promote the production of T h 2 cytokines (including itself; it is auto-regulatory), while interleukin 10 (IL-10) inhibits a variety of cytokines including interleukin 2 and IFNγ in helper T cells and IL-12 in dendritic cells and macrophages. The combined action of these two cytokines suggests that once ...

  4. Lymphocyte T-cell immunomodulator - Wikipedia

    en.wikipedia.org/wiki/Lymphocyte_T-Cell_Immuno...

    Lymphocyte T-cell immunomodulator (LTCI) is an immune regulating polypeptide, which is a potent regulator of CD-4 lymphocyte production and function. It increases lymphocyte numbers and interleukin-2 (IL-2) production in animals.

  5. Lymphocyte - Wikipedia

    en.wikipedia.org/wiki/Lymphocyte

    A lymphocyte is a type of white blood cell (leukocyte) in the immune system of most vertebrates. [1] Lymphocytes include T cells (for cell-mediated and cytotoxic adaptive immunity), B cells (for humoral, antibody-driven adaptive immunity), [2] [3] and innate lymphoid cells (ILCs; "innate T cell-like" cells involved in mucosal immunity and homeostasis), of which natural killer cells are an ...

  6. T-cell growth factor - Wikipedia

    en.wikipedia.org/wiki/T-cell_growth_factor

    T-cell growth factors acronym: TCGF(s) are signaling molecules collectively called growth factors which stimulate the production and development of T-cells. A number of them have been discovered, among them many members of the interleukin family. The thymus is one organ which releases TCGFs. TCGFs have been able to induce T-cell production ...

  7. Co-stimulation - Wikipedia

    en.wikipedia.org/wiki/Co-stimulation

    CD2 was shown to prime naive T cells (T N) even without CD28 or TCR. [2] Also, CD27 is a receptor constitutively expressed on T N (its expression is downregulated upon TCR stimulation) and enhances T cell proliferation. [9] The differentiation of T helper cells (T H) into different subsets also partially depends on their co-stimulatory molecules.

  8. Regulatory T cell - Wikipedia

    en.wikipedia.org/wiki/Regulatory_T_cell

    All T cells derive from progenitor cells in the bone marrow, which become committed to their lineage in the thymus.All T cells begin as CD4-CD8-TCR- cells at the DN (double-negative) stage, where an individual cell will rearrange its T cell receptor genes to form a unique, functional molecule, which they, in turn, test against cells in the thymic cortex for a minimal level of interaction with ...

  9. Cell growth - Wikipedia

    en.wikipedia.org/wiki/Cell_growth

    Cell growth refers to an increase in the total mass of a cell, including both cytoplasmic, nuclear and organelle volume. [1] Cell growth occurs when the overall rate of cellular biosynthesis (production of biomolecules or anabolism) is greater than the overall rate of cellular degradation (the destruction of biomolecules via the proteasome, lysosome or autophagy, or catabolism).