Bruton tyrosine kinase

Bruton tyrosine kinase (BTK) is an important enzyme inside certain immune cells, particularly B cells, which help the body fight infections. It plays a key role in signaling pathways that tell B cells to grow, develop, and produce immune responses. When BTK functions properly, it supports a healthy immune system. However, in some diseases like certain cancers and autoimmune conditions, BTK can be overactive or abnormal. Medications that inhibit BTK can help to control these conditions by preventing unneeded or harmful B cell activity, making BTK a valuable target for specific therapies.