Association of anti-ribosomal P protein antibodies with neuropsychiatric systemic lupus erythematosus
© The Author(s) 2004
Received: 16 January 2004
Published: 24 February 2004
There is an unclear association of anti-P with neuropsychiatric (NP) SLE.
Our objective was to determine the prevalence of anti-P in 150 SLE patients, focusing on psychosis and/or mood disorders, other diffuse NP syndromes and focal NP syndromes, and to analyze the manifestation of NP syndromes regarding SLE duration and anti-P status.
One hundred and fifty Caucasian SLE patients (133 female, 17 male) were studied, 88 of whom had a disease duration of more than 5 years. IgG anti-P were detected by immunoblotting performed on ribosomal extract of HeLa cells and/or by line immunoassay (INNO LIA ANA). NP manifestations presenting at any time were defined according to ACR case definitions for NP SLE. Patients in whom diffuse and focal NP manifestations occurred at the same time were classified according to the predominant manifestation.
Anti-P positive (n = 17)
Anti-P negative (n = 133)
Psychosis and/or mood disorders
Other diffuse NP syndromes
Only focal NP syndromes
Without NP manifestations
In our study anti-P antibodies showed a strong association with diffuse but not focal NP syndromes in SLE patients, especially those with disease duration over 5 years.