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Ribosomal P antibodies and CNS lupus

Oklahoma Medical Research Foundation, Oklahoma City, Oklahoma, USA, morris-reichlin{at}omrf.ouhsc.edu

Within two years of the recognitionof autoantibodiesto ribosomal P proteinsin patients with systemic lupus erythematosus(SLE) an associationwith anti-P autoantibodieswith psychosiswas noted. While there has been some controversy about this association, ample evidence suggests a meaningful relationship between anti-P antibodies and central nervous system (CNS) disease. This evidence consists of 1) seven independent studies showing a strong relationship between anti-P antibodies and CNS disease; 2) longitudinal studies showing fluctuations of anti-P antibodies with episodes of psychosis; 3) correlation of anti-P antibodies with general disease activity; and 4) acid eluates form lupus renal tissuewere foundto contain anti-Pantibodiesenriched30-fold with respectto their specific activity in serum heralding a direct role of anti-P antibodies in disease expression. Finally, there is evidencethat the P protein resides on normal cells in an immunologicallyaccessibleway and evidence exists that anti-P antibodies are able to bind and penerate cells in culture, and once inside cells can affect a profound inhibition of protein synthesis in living cells. Taken together, these observations provide evidence linking anti-P antibodies to various forms of CNS disease. While this is true, there are other autoantibodiesin SLE patients such as anti-dsDNA and antiglialfibrillary protein which may also play a role in the CNS disease of SLE patients. Continued study will inform us of the relative contribution of these autoantibodies to CNS disease in SLE patients.

Key Words: CNS disease • ribosomal P antibodies

Lupus, Vol. 12, No. 12, 916-918 (2003)
DOI: 10.1191/0961203303lu502oa


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