B cells activation markers

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Inspect mode — when you PunchOut to Bio-Rad from a previously created requisition but without initiating an Edit session, you will be in this mode. You cannot modify any Cart contents. Click here to find out how. B cells are lymphocytes which, along with T cells, constitute the adaptive immune system, providing a specifically targeted response to infection. For detailed information on B cell function, activation and lineage, refer to our B cell mini-review.

Selecting the right marker to identify B cell subtypes can be a time consuming process. In the tables below we have listed general key markers expressed by B cells and also markers that can be used to identify peripheral B cell subtypes. C3d and Epstein-Barr virus receptor that interacts with CD19 to induce B cell inflammatory responses. Contain highly conserved motifs in their cytoplasmic domains for tyrosine phosphorylation and Src family kinase docking to initiate B cell activation.

Adapted from LeBien and Tedder Ig, immunoglobulin; GC, germinal center. Adapted from Naradikian et al. B cells are derived from the bone marrow or bursa cells in birds , originating from hematopoietic stem cells, which differentiate into multipotent progenitor cells then into common lymphoid progenitor cells. The subsequent developmental process of B cells is complex with many different stages, which is dependent upon the stimuli received and through which the B cell gains its antigen specificity.

At these stages of development different surface antigens are expressed enabling detection of specific B cells during their maturation process. Figure 1 below show the B cell lineage of both humans and mice alongside key markers for the different stages of development. For further information on B cell development, refer to our B cell mini-review. Figure 1: Human a and mouse b B cell lineage.

Click on the B cell lineage relevant image above to obtain human and mouse specific posters and guides. B cell activation begins by the recognition and binding of an antigen by the B cell receptor. This can either take place in a T cell dependent or T cell independent manner. Once the antigen has bound to the B cell, receptor mediated endocytosis takes place engulfing the antigen into the B cell, where the antigen is then degraded.

T helper cells which have been activated by the same antigen recognize these antigen fragments and bind to the antigen-MHC class II complexes via their T cell receptor.

This binding stimulates B cell proliferation and promotes differentiation into plasma cells, which switch from generating B cell receptors, which are membrane bound, to secreted ones called antibodies.

The T cell dependent activation of B cells is a longer process than T cell independent activation, taking several days, however higher affinity antibodies are produced providing a much more specific response to infection. The differentiation of activated B cells is a two-step process.

Firstly plasmablasts develop forming short lived plasma cells followed by the development of longer lived plasma cells and memory B cells for life long protection. The second stage of development takes place in germinal centres which form inside lymphoid follicles, facilitated by T follicular helper cells.

Future infections by the same pathogen will activate the memory B cells, developed during the initial infection by the pathogen by the process described above. We haven't added this to the BETA yet. New BETA website. Switch on our new BETA site. Now available Search and browse selected products. Purchase these through your usual distributor. In the coming months Additional product types Supporting content Sign in to your account Purchase online.

Immune cell markers poster. Fluorochrome chart — a complete guide. Multicolor flow cytometry panel design. Flow cytometry multicolor selector tool. Flow cytometry immunophenotyping protocol. Human CD antigen chart. Primary antibodies for Flow cytometry. B cells are responsible for producing and releasing antibodies to specific antigens, and hence, are an essential component of the humoral immune response.

Development from stem cell to B cell Generation of the B cell begins in the bone marrow where stem cells give rise to lymphoid cells. Subtypes of conventional B cells Conventional B cells, also referred to as B-2 cells, terminally differentiate into one of two common subtypes upon activation: Plasma B cells: a plasma cell is the sentry of the immune system.

When it encounters a unique antigen, the plasma cell takes in the antigen through receptor-mediated endocytosis. Antigenic particles are transferred to the cell surface, loaded onto MHC II molecules and presented to a helper T cell. The activated B cell goes through a period of rapid proliferation and somatic hypermutation. Selection occurs for those cells that produce antibodies with a high affinity for that particular antigen.

Once terminally differentiated, the plasma B cell only secretes antibodies specific for that antigen and can no longer generate antibodies to other antigens. Memory B cells: memory cells are held in reserve, in the germinal centers of the lymphatic system, for when the immune system re-encounters a specific antigen.

During any repeat exposure the follicular helper T cell causes the memory cell to differentiate into a plasma B cell that has a greater sensitivity to that specific antigen. This jump-starts the immune system to mount a quicker, more powerful response than was possible previously. B-1 cells are primarily present during fetal and neonatal life. Marginal zone MZ B cells: mature memory B cells that are found only in the marginal zone of the spleen.