TPO and autoimmune disease: These include antibodies specific to autoimmune diseases, e.g., anti-thyroid peroxidase (anti-TPO), anti-thyroglobulin (anti-TG), and antinuclear antibodies (ANAs), as well as those that are non-specific, such as anti-malondialdehyde-modified human serum albumin (anti-HSA-MDA) or anti-α-crystallin.