In a recent study posted to the bioRxiv* pre-print server, researchers investigated the complement component 1q (C1q) binding and subsequent complement activation by neutralizing antibodies (nAbs) ...

Your complement system consists of a group of important proteins in your bloodstream. These proteins help your immune system fight off harmful invaders, such as bacteria, and other foreign substances.

Circulating cold-insoluble complexes, observed in 11 of 31 patients with systemic lupus erythematosus (SLE), consisted mainly of immunoglobulin G and the C′lq component of complement and did not ...

The complement system is primarily a host defence mechanism, but it causes injury to tissue cells through the formation of the membrane attack complex (C5b–C9), which leads to cell lysis and cell ...