SM, ENA, Extractable Nuclear Antibodies, Smith Antibody
Sm (Smith) Antibodies
Sm or Smith Antibody is considered a marker for SLE. It occurs in a minority of SLE patients with a low sensitivity, but is very specific for SLE but without anti-dsDNA antibody.
Negative <1.0 AI
Analytical measuring range is 0.2-8.0 AI (Antibody Index)
Positive results supports diagnosis of SLE with renal involvement.