Recombinant Human CXCL13 protein

Supplementary information

This supplementary information is collated from multiple sources and compiled automatically.

CXCL13 also known as B cell-attracting chemokine 1 (BCA-1) is a chemokine with a molecular weight of approximately 11 kDa. This protein plays an important mechanical role in the immune system by guiding the movement of B cells via chemotaxis. CXCL13 expression occurs mainly in secondary lymphoid tissues such as the spleen lymph nodes and mucosa-associated lymphoid tissue. Its expression is also noted in certain non-lymphoid tissues under inflammatory conditions.

Biological function summary

In the context of immune response and lymphoid tissue organization CXCL13 attracts B cells by interacting with the chemokine receptor CXCR5. These interactions support the formation of B-cell follicles essential for efficient immune responses. CXCL13 is not known to be part of a larger protein complex but instead works through its specific receptor-ligand interactions. Its role in guiding cell migration is vital for the development of secondary lymphoid structures.

Pathways

CXCL13 is significantly involved in the B-cell receptor signaling pathway. The chemokine facilitates the homing of B cells to follicles an important step in the adaptive immune response. CXCL13 closely associates with CXCR5 its specific receptor playing a part in establishing the spatial organization of lymphoid tissues. Additionally the chemokine influences the germinal center reaction an integral part of the immune pathway for antibody maturation.

CXCL13 levels have been linked to autoimmune diseases like rheumatoid arthritis and certain types of lymphomas. In rheumatoid arthritis increased CXCL13 expression correlates with disease severity related to its role in recruiting B cells that contribute to chronic inflammation. In lymphomas particularly those involving B cells CXCL13 supports the growth and survival of malignant cells. Its association with disease states often involves changes in CXCR5 expression or function contributing to disrupted B-cell localization and abnormal immune responses.