Autoimmune disease results from abnormal response of immune system. These cells help suppress or regulate immune responses. Infected cells are routinely opsonized with antibodies for detection by immune cells. Immunosuppressive antibodies target steps in the immune response. It works by decreasing inflammation and immune system activity. In the immune system dopamine acts upon receptors present on immune cells, especially lymphocytes. Inflammation is one of the first responses of the immune system to infection. ITAMs are important for signal transduction in immune cells. Death results from opportunistic infections secondary to disruption of the immune system caused by AIDS. The MYD88 gene provides instructions for making a protein involved in signaling within immune cells. Lysozyme is part of the innate immune system. The effect of glucocorticoids on Fc receptor expression in immune cells is complicated. Deficiencies result in disorders of the skin and poor immune functioning. The mechanism of this immune response is virus specific. They bind to pathogens as part of the immune system.