Mouse C1q ELISA Kit
C1q forms, together with C1r and C1s, the C1 macromolecule, the first component of the classical complement pathway. The formation of an antibody–antigen complex (immune complex) is a principal mechanism of classical complement pathway activation. C1q initiates the activation process by binding to antibodies within immune complexes, thereby serving as a link between the innate and adaptive immune systems. Interaction of immune complexes with C1q induces conformational changes within the C1 complex that lead to activation of the classical complement pathway. C1q functions as a recognition molecule by binding to the Fc regions of IgG or IgM when these immunoglobulins are associated with their respective antigens. C1q can also bind to apoptotic cells and cellular debris, promoting their clearance through complement activation and phagocytosis. C1q is predominantly produced by macrophages and is also expressed by other cells of the monocyte-macrophage lineage. Deficiencies in C1q can impair immune complex and apoptotic cell clearance and have important effects on immune regulation.
In research settings, C1q is widely studied to investigate classical complement pathway activation, immune complex clearance, inflammation, and the mechanisms underlying autoimmunity. Researchers examine C1q levels and activity in experimental models of autoimmune and inflammatory diseases, including systemic lupus erythematosus (SLE) and lupus nephritis. C1q is also studied for its role in the recognition and clearance of apoptotic cells and cellular debris, as well as its contribution to complement-mediated tissue injury and immune regulation. Measurement of C1q can help researchers characterize alterations in complement activity and investigate the effects of genetic or experimental factors on complement function.
In clinical settings, C1q is relevant to the evaluation and study of complement deficiencies and immune-mediated diseases. Inherited C1q deficiency is strongly associated with susceptibility to SLE and other autoimmune manifestations, while altered C1q levels have been observed in patients with lupus nephritis and other complement-mediated conditions. Anti-C1q autoantibodies have also been associated with SLE and renal involvement, particularly in the context of immune complex-mediated disease. Measurement of C1q, together with other complement components and autoantibody markers, can provide information about complement system activity and support the investigation of disease mechanisms and clinical disease patterns.
This Mouse C1q ELISA Kit is manufactured in Netherlands by Hycult Biotech.
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