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AC-12 - Punctate Nuclear Envelope

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Found in patients with PBC, as well as patients with other autoimmune liver diseases and SARD.
If PBC is clinically suspected, it is recommended to perform a follow-up test for anti-gp210 antibodies; the antigen is included in disease specific immunoassays (ie, extended liver profile).
Other antigens recognized include p62 nucleoporin, LBR, and Tpr; specific immunoassays for these autoantibodies are currently not commercially available.

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Anti-p62 nucleoporin antibodies have been described in PBC and SLE.
Anti-LBR antibodies have been described in PBC.
Anti-Tpr antibodies have been described in PBC, autoimmune liver disease, SLE, SSc and SjS.
Most reports describe autoantibodies directly binding to specific antigens (i.e., antigen-specific immunoassays) and do not actually show clear correlations with the AC-12 pattern as such; specific immunoassays for these autoantibodies are currently not commercially available.