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The thymus (pl.: thymuses or thymi) is a specialized primary lymphoid organ of the immune system. Within the thymus, thymus cell lymphocytes or T cells mature.
CCL17 is a powerful chemokine produced in the thymus and by antigen-presenting cells like dendritic cells, macrophages, and monocytes. [5] CCL17 plays a complex role in cancer. It attracts T-regulatory cells allowing for some cancers to evade an immune response. [ 6 ]
Thymic involution is the shrinking of the thymus with age, resulting in changes in the architecture of the thymus and a decrease in tissue mass. [1] Thymus involution is one of the major characteristics of vertebrate immunology, and occurs in almost all vertebrates, from birds, teleosts, amphibians to reptiles, though the thymi of a few species of sharks are known not to involute.
53603 Ensembl ENSG00000145777 ENSMUSG00000024379 UniProt Q969D9 Q9JIE6 RefSeq (mRNA) NM_033035 NM_138551 NM_021367 RefSeq (protein) NP_149024 NP_612561 NP_067342 Location (UCSC) Chr 5: 111.07 – 111.08 Mb Chr 18: 32.95 – 32.95 Mb PubMed search Wikidata View/Edit Human View/Edit Mouse Thymic stromal lymphopoietin (TSLP) is an interleukin (IL)-2 -like cytokine, alarmin, and growth factor ...
TECs, as a component of the thymus, play a key role in thymocyte development and self-tolerance, so their dysfunction causes many autoimmune diseases, tumors of immunodeficiencies. Most frequently are occurred epithelial tumors established from TEC and thymocytes - thymomas and thymic carcinoma .
Molecules known to be important for thymus entry include P-selectin (CD62P) and the chemokine receptors CCR7 and CCR9. [5] Following thymus entry, progenitors proliferate to generate the ETP population. This step is followed by the generation of DN2 thymocytes which migrate from the cortico-medullary junction toward the thymus capsule.
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 ...
While cTECs control the functionality of TCRs during the process called positive selection, Medullary thymic epithelial cells (mTECs) that home in the inner part of the thymus- medulla, present on their MHC molecules self-peptides, generated mostly by protein Autoimmune regulator, to eliminate T cells with self-reactive TCRs via processes of ...