Britannica
Sources used in this answer
How do clotting factors in inflammatory exudate help limit infection?
Created from Britannica articles
using AI.
AI can make mistakes, so verify using Britannica articles.
inflammation
The main function of complement proteins is to aid in the destruction of pathogens by piercing their outer membranes (cell lysis) or by making them more attractive to phagocytic cells such as macrophages (a process known as opsonization). Some complement components also promote inflammation by stimulating cells to release histamine and by attracting phagocytic cells to the site of infection.
During the acute inflammatory response, increased vascular permeability allows protein-rich fluid, known as exudate, to exit blood vessels and enter the surrounding tissues. This exudate contains clotting factors that play a critical role in defending the body.1
Specifically, the coagulation system converts the plasma protein fibrinogen into fibrin. Fibrin is a tough, insoluble protein that forms long fibrous chains. By creating a mesh-like network within the tissue, these fibrin threads help trap infectious agents, effectively preventing them from spreading throughout the body. This process acts as a physical barrier, containing the infection to the site of injury and facilitating the body's localized immune response.21