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B cell activation: from immature B cell to plasma cell or memory B cell Basic B cell function: bind to an antigen, receive help from a cognate helper T cell, and differentiate into a plasma cell that secretes large numbers of antibodies. B cell activation occurs in the secondary lymphoid organs (SLOs), such as the spleen and lymph nodes. [1]
Step 4: The activated T helper cell binds to a B cell in order to activate the B cell. Step 5: When the B cells are activated, some B cells turn into plasma cells and are released in the blood, while other B cells become B memory cells that quicken response for a second exposure.
10673 24099 Ensembl ENSG00000102524 ENSMUSG00000031497 UniProt Q9Y275 Q9WU72 RefSeq (mRNA) NM_001145645 NM_006573 NM_033622 NM_001347309 RefSeq (protein) NP_001139117 NP_006564 NP_001334238 NP_296371 Location (UCSC) Chr 13: 108.25 – 108.31 Mb Chr 8: 10.06 – 10.09 Mb PubMed search Wikidata View/Edit Human View/Edit Mouse B-cell activating factor (BAFF) also known as tumor necrosis factor ...
In immunology, a naive B cell is a B cell that has not been exposed to an antigen. These are located in the tonsils , spleen , and primary lymphoid follicles in lymph nodes . Once exposed to an antigen , the naive B cell either becomes a memory B cell or a plasma cell that secretes antibodies specific to the antigen that was originally bound.
Mechanism of class-switch recombination that allows isotype switching in activated B cells. Immunoglobulin class switching, also known as isotype switching, isotypic commutation or class-switch recombination (CSR), is a biological mechanism that changes a B cell's production of immunoglobulin from one type to another, such as from the isotype IgM to the isotype IgG. [1]
Additionally, the T cells are able to help the B cells by the interaction of the T cell CD40 ligand with the B cell CD40 molecule, which causes a signaling cascade that is beneficial for the survival and proliferation of B cells. B cell receptor activation results in the activation of the NF-kB signaling pathway, which is essential for the ...
A B-cell receptor includes both CD79 and the immunoglobulin. The plasma membrane of a B cell is indicated by the green phospholipids. The B- cell receptor extends both outside the cell (above the plasma membrane) and inside the cell (below the membrane). The B-cell receptor (BCR) is a transmembrane protein on the surface of a B cell.
T cell factors that induced B cell activation, proliferation, growth, and differentiation were frequently generated by mixed populations of T cells. When the first immortalized T cell lines began to emerge, it became possible to observe which T cells had specific effects on B cells.