Spleen tyrosine kinase

Spleen tyrosine kinase (Syk) is an enzyme that plays a crucial role in the immune system by transmitting signals inside cells after immune receptors detect an invader, like bacteria or viruses. Once activated, Syk helps coordinate the immune response, including the activation of cells that attack pathogens or release inflammatory substances. It is vital for proper immune function but can also contribute to autoimmune diseases if overactive. Because of this, Syk is a target for certain drugs designed to treat immune-related conditions by modulating its activity.