What is the relationship between autoantigen, autoantibody and immune tolerance?

(_) Hello. 1. Let's talk about antigens first. Antigens usually refer to pathogens, some from outside and some from inside. In addition to the lens of the eye, some cells are regarded as "non-self" substances (such as target cells, mutant cells and cancer cells) after being infected by viruses. These denatured cells, which can stimulate the immune response, are called autoantigens. Autoantibody: Immunoglobulin synthesized and secreted by immune cells, which can kill pathogens. Immune tolerance: Generally, immune cells have substances that recognize "self" and "non-self". Immune tolerance is called immune prototype to pathogens and no immune response to their own substances. Pure hand tour, hope to adopt.