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Anti-Ribosomal-P Antibody Association with Neuropsychiatric Lupus in Sudanese Patients Attending Rheumatology Clinic in Omdurman Military Hospital.

PURPOSE: To assess and establish the relationship between neuropsychiatric systemic lupus erythematosus (NPSLE) involvement and serological biomarkers like antiribosomal-P antibodies.

PATIENTS AND METHODS: This is an analytical cross-sectional hospital-based study conducted on patients attending Omdurman Military Hospital from July 2019 to December 2019. A total of 90 patients were enrolled, 30 of whom had NPSLE compared with 60 SLE patients without NPSLE. SLE diagnosis was established based on the revised SLICC criteria (presence of at least 4 criteria) for SLE classification, with neuropsychiatric manifestations defined based on the ACR nomenclature. The immunological examination results have been performed by (ELISA immune-enzymatic method, immunofluorescence, and Western immunoblotting test). SPSS v 21.0 software was utilised for data analysis.

RESULTS: NPSLE patients exhibited +ve ANA in 96.7% vs 75% in non-NPSLE (P-value = 0.008), antiribosomal-P antibodies (46.7% vs 20%; P-value = 0.0001), anti-nucleosome antibodies (26.7% vs 5%; P-value = 0.005), and anti-histones antibodies (40% vs 20%; P-value = 0.04). ANA antibodies were significantly associated with neurological manifestations as ANA antibodies were common in epilepsy (n = 9; 91%) and stroke (n = 8; 27.6%) (P-value < 0.001).

CONCLUSION: Neuropsychiatric manifestation of systemic lupus erythematosus exhibits variable clinical manifestations. Neuropsychiatric manifestations of SLE are strongly associated with the anti-ribosomal P antibody presence and can be employed as a powerful diagnostic tool.

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