Anti-actin antibodies
Anti-actin antibodies (AAA) are found at increased frequency in certain autoimmune diseases and may be of some diagnostic value. In coeliac disease, anti-actin antibody levels correlate with the level of intestinal damage. In autoimmune hepatitis, anti-actin antibody levels correlate with patterns of immune recognition, the pattern of recognition was specific to  a small percentage of autoimmune hepatitis type 1 or cryptogenic hepatitis patients. In gastric cancer anti-actin antibodies were elevated, along with other antibodies in severe disease with poor outcomes. It has also been found as a paraneoplastic syndrome with myelodysplastic syndrome. References

Autoantibodies