Ssa Antibody Range

The reference range of anti ro antibodies is negative.

Ssa antibody range.

It is not a specific enough test to determine a definitive diagnosis in a majority of patients but it can be used with other tools and tests to determine if lupus is present. The presence of both antibodies ss a and ss b strengthen the diagnosis of sjögren s syndrome and conveys prognostic information. Anti ro52 antibodies in particular have been tied to elevated photosensitivity. Patients with ss a may also have antibodies to cardiolipin lupus anticoagulant and clinical thromboses.

Ss a ro antibodies occur in patients with several different connective tissue diseases including sjogren syndrome an autoimmune disease that involves primarily the salivary and lachrymal glands up to 90 of cases. Ss b la is composed of a 48 kd protein combined with rna species. This has been termed antiphospholipid antibody syndrome. Ss a ro antibodies occur in patients with several different connective tissue.

The ssa antibody is usually found with the ssb antibody which means there is typically an anti ssb blood test ordered with the anti ssa test. Lower likelihood of anti dna antibodies. Ss a ro ss b la rnp and sm are autoantigens commonly referred to as extractable nuclear antigens ena. Ss a ro is an extractable nuclear antigen ena composed of protein antigens of 52 kd and 60 kd combined with cytoplasmic rna species.

Anti ss a and anti ss b are found in virtually all children with neonatal lupus. Antibodies to ena are common in patients with connective tissue diseases systemic rheumatic diseases. Sjogren s antibodies ss a ss b sjögren s antibodies ss b is detected in approximately 15 of patients with sjögren s syndrome. Ss a ro antibodies are associated with childhood le neonatal le and with congenital heart block in infants born to mothers with le 1 2 ss a ro antibodies have also been reported to be associated with features of extraglandular inflammation in patients with le including vasculitis purpura cytopenias and adenopathy.

Anti ssa plus anti la ssb is associated with the following factors. Antibodies to ss a are also associated with hla loci dr3 and dr2 and with hereditary deficiency of c2. Both anti ssa and anti ssa are usually absent in secondary sjögren s syndrome. Lupus erythematosus le 40 60 of.

Sjögren s antibody ss b is present only if sjögren s antibody ss a is also detected. Anti ro ssa is produced in the cytoplasm of cells in the epidermal layer of the skin following uv irradiation. When anti ssa levels are elevated in sle it is often in antinuclear antibody ana negative lupus. Ss a ro is composed of protein antigens of 52 kd and 60 kd combined with cytoplasmic rna species.

Ss b la antibodies are found primarily in patients with sjogren syndrome or le where they occur with frequencies of approximately 60 and 15 respectively 1 2 ss b la antibodies occur only infrequently in the absence of ss a ro antibodies.