Interleukin-17 (IL-17)

Interleukin-17 (IL-17) is a protein produced by certain immune cells that helps defend the body against infections by stimulating inflammation and recruiting other immune cells to the site of invasion. It plays a crucial role in protecting against bacteria and fungi, especially at barrier sites like the skin and mucous membranes. However, when IL-17 is overactive or improperly controlled, it can contribute to autoimmune diseases such as psoriasis and rheumatoid arthritis, where the immune system mistakenly attacks the body's own tissues. Overall, IL-17 is an essential part of immune defense but must be carefully regulated to prevent inflammation-related health issues.