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Novel anti-suprabasin antibodies may contribute to the pathogenesis of neuropsychiatric systemic lupus erythematosus

Ichinose, Kunihiro    (Department of Immunology and Rheumatology, Unit of Advanced Preventive Medical Sciences, Division of Advanced Preventive Medical Sciences, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan   ); Ohyama, Kaname    (Course of Pharmaceutical Sciences, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan   ); Furukawa, Kaori    (Department of Immunology and Rheumatology, Unit of Advanced Preventive Medical Sciences, Division of Advanced Preventive Medical Sciences, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan   ); Higuchi, Osamu    (Department of Clinical Research, Nagasaki Kawatana Medical Center, Nagasaki, Japan   ); Mukaino, Akihiro    (Department of Neurology and Strokology, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan   ); Satoh, Katsuya    (Department of Health Sciences, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan   ); Nakane, Shunya    (Department of Clinical Research, Nagasaki Kawatana Medical Center, Nagasaki, Japan   ); Shimizu, Toshimasa    (Department of Immunology and Rheumatology, Unit of Advan  ); Umeda, Masataka   Fukui, Shoichi   Nishino, Ayako   Nakajima, Hideki   Koga, Tomohiro   Kawashiri, Shin-ya   Iwamoto, Naoki   Tamai, Mami   Nakamura, Hideki   Origuchi, Tomoki   Yoshida, Mari   Kuroda, Naotaka   Kawakami, Atsushi  
  • 초록  

    Abstract Neuropsychiatric systemic lupus erythematosus (NPSLE) is often difficult to diagnose and distinguish from other diseases, because no NPSLE-specific antibodies have been identified. We developed a novel proteomic strategy for identifying and profiling antigens in immune complexes in the cerebrospinal fluid (CSF), and applied this strategy to 26 NPSLE patients. As controls, we also included 25 SLE patients without neuropsychiatric manifestations (SLE), 15 with relapsing remitting multiple sclerosis (MS) and 10 with normal pressure hydrocephalus (NPH). We identified immune complexes of suprabasin (SBSN) in the CSF of the NPSLE group. The titer of anti-SBSN antibodies was significantly higher in the CSF of the NPSLE group compared to those of the SLE, MS and NPH groups. Microarray data showed that the senescence and autophagy pathways were significantly changed in astrocytes exposed to anti-SBSN antibodies. Our findings indicate that SBSN could be a novel autoantibody for the evaluation of suspected NPSLE. Highlights Anti-suprabasin (SBSN) antibodies with potential roles in the pathogenesis of NPSLE were identified. The highest frequencies of autoantibodies against SBSN were detected by a LIPS assay in patients with NPSLE. Anti-SBSN antibodies directly induced the expression of genes related to damage and inflammation of astrocytes. SERPINE1 expression was increased in astrocytes with anti-SBSN antibodies.


  • 주제어

    Neuropsychiatric systemic lupus erythematosus .   Suprabasin .   Cerebrospinal fluid .   Immune complexes.  

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