La/SSB and Ro/SSA antibody tests are used to detect autoantibodies associated with autoimmune diseases such as Sjögren’s syndrome and systemic lupus erythematosus (SLE). These antibodies, which are part of the antinuclear antibody (ANA) panel, play a key role in the diagnosis and monitoring of these conditions.
Ro/SSA antibodies (mainly against Ro60 and Ro52 proteins) are most commonly linked to Sjögren’s syndrome, lupus, and complications such as neonatal lupus (caused by transplacental transfer of antibodies from mother to fetus). La/SSB antibodies are usually found alongside Ro/SSA antibodies, particularly in Sjögren’s syndrome.
The presence of these antibodies may be associated with symptoms such as dry eyes and mouth, skin rashes, or cardiac involvement in newborns. The test is performed through venous blood sampling, and results are interpreted in conjunction with clinical symptoms and other investigations (such as salivary gland biopsy).
Positive results, especially in pregnant women, require close monitoring to prevent fetal complications such as congenital heart block. This test is also useful in distinguishing autoimmune diseases from other inflammatory disorders.
