BTK Antibody

Tyrosine-protein kinase BTK (BTK) is a tyrosine kinase that plays a crucial role in B-cell ontogeny. Defects in BTK are the cause of X-linked agammaglobulinemia (XLA) also known as X-linked agammaglobulinemia type 1 (AGMX1) or immunodeficiency type 1 (IMD1). XLA is a humoral immunodeficiency disease which results in developmental defects in the maturation pathway of B-cells. Affected boys have normal levels of pre-B-cells in their bone marrow but virtually no circulating mature B-lymphocytes. This results in a lack of immunoglobulins of all classes and leads to recurrent bacterial infections.