How do glucocorticoids impact the immune response?

• A. They enhance inflammation
• B. They stimulate immune cell production
• C. They suppress inflammation and immune response
• D. They activate complement proteins

Answer: (C)

Glucocorticoids, which are steroid hormones produced by the adrenal glands, play a crucial role in regulating the immune response. Their primary function in this context is to suppress both inflammation and the overall immune response. By doing so, they help to control excessive inflammatory reactions that can lead to tissue damage and contribute to various autoimmune disorders.

The suppression of the immune response occurs through several mechanisms. Glucocorticoids inhibit the proliferation and activity of various immune cells, such as T cells and B cells, and reduce the expression of pro-inflammatory cytokines and chemokines. This not only leads to a decrease in the recruitment of immune cells to sites of inflammation but also diminishes the effectiveness of the immune system in responding to infections and foreign pathogens.

Additionally, glucocorticoids impact the function of other components of the immune system, including the suppression of the production of antibodies and the downregulation of major histocompatibility complex (MHC) molecules. This comprehensive suppression helps to prevent harmful inflammation but can also contribute to an increased susceptibility to infections, highlighting the need for careful management when using glucocorticoids in clinical settings.