An Overview of Antigen Properties, Classifications and Mechanisms of Action

The goal of this review is to fill in the gaps by offering a thorough analysis of antigens, including their characteristics, classes, types, and mode of action, as well as the variables influencing antigenicity and its uses. The idea of antigens originated from the body's ability to discriminate between foreign particles and its own constituent parts. As the level of alienation rises, so does the antigen's immunogenicity. When it comes to biological antigens, the degree of alienation rises as the evolutionary distance between the two species widens. There are, however, certain exceptions, such as auto antigens, which are proteins that naturally reside in the host and may also trigger an immune response. Protein complexes or host proteins are targeted by auto antigens, resulting in autoimmune diseases.

Auto antigens can be fatal to the host because the immune system shouldn't attack the body's own cells. Although infections, foreign substances, proteins, and peptides can all be considered antigens, their role in inducing immune responses is crucial for the body's defense against dangerous intruders. Understanding antigens is essential for immunology, in the developing of vaccinations, and the diagnosis of disease since some antigens have been suggested as the best targets for immunotherapy in clinical settings, have significant uses in medical diagnostics, and can be employed in the creation of vaccines to treat cancer. To discover more about antigens and how they function in medicine and health, further research is also required.