Detection of SSA and SSB Antibodies Associated with Primary Sjögren's Syndrome Using Enzyme-Linked Immunosorbent Assay.

Antibodies to Ro52/Ro60 (SSA) and La (SSB) are strongly associated to the autoimmune disease primary Sjögren's syndrome and are important in the serologic diagnosis of the disease. Several methods for detection of these antibodies exist such as indirect immunofluorescence, commercial western blot kits, in-house assays, and numerous commercial enzyme-linked immunosorbent assays (ELISAs). Dependent on the type of assay, sensitivity and specificity may vary notably. Especially ELISAs, where the antibody reactivity to synthetic peptides, recombinant or native proteins are determined, are often applied. This chapter describes detection of SSA and SSB antibodies by ELISA.