Systemic Lupus Erythematosus (SLE)

SLE, also commonly referred to as lupus, is a chronic autoimmune disease that causes the body’s immune system to attack its own healthy tissues. This complex disease affects at least 5 million people worldwide, including an estimated 1.5 million Americans.

B cells, a type of immune cell, are over-activated in SLE and produce antibodies that recognize healthy tissue (autoantibodies) which may be present years before a patient experiences symptoms. Blocking B cell activation may be the key to treating SLE. While Bruton’s tyrosine kinase (BTK) inhibitors have been shown to inhibit B cell activation in laboratory settings, none are currently available to treat SLE.

Blocking B cell activation may be the key to treating SLE.

In the last 60 years, only one new medicine, belimumab (Benlysta) has been approved to treat lupus. However, currently available treatments fail to provide a long-lasting benefit to many patients. Consequently, SLE remains a significant, medically underserved disease.

For more information, please visit:

American College of Rheumatology: Lupus »

National Institute of Health: Lupus »

Lupus Foundation of America »

For detailed information about completed and ongoing clinical studies for AC0058, ACEA’s BTK inhibitor, please visit