Which compounds are part of the oxidative burst mechanism in phagocytes?

• A. Histamine and Prostaglandin
• B. Superoxide, hypochlorite, and peroxide
• C. Defensins and Lactoferrin
• D. Thrombocidin and Kinins

Answer: (B)

The oxidative burst mechanism in phagocytes is a crucial process that enhances the pathogen-fighting abilities of these immune cells. This mechanism involves the rapid production of reactive oxygen species (ROS) that help to kill and digest invading microorganisms. Compounds such as superoxide, hypochlorite, and peroxide are integral to this process.

Superoxide is formed when oxygen is reduced by electrons, which initiates the oxidative burst. It has potent antimicrobial properties and can further react to form hydrogen peroxide. Hydrogen peroxide can then be processed into hypochlorite, a powerful oxidizing agent that effectively kills bacteria and other pathogens.

All these compounds work synergistically to create a highly reactive environment that is lethal to the ingested pathogens, enhancing the phagocyte's ability to clear infections. Collectively, superoxide, hypochlorite, and peroxide are essential components of the tightly regulated oxidative burst response that characterizes the function of phagocytes during an immune response.