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Autoantibodies against heterogeneous nuclear ribonucleoprotein B1 in CSF of MS patients
Author(s) -
Sueoka Eisaburo,
Yukitake Motohiro,
Iwanaga Kentaro,
Sueoka Naoko,
Aihara Tomoko,
Kuroda Yasuo
Publication year - 2004
Publication title -
annals of neurology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 4.764
H-Index - 296
eISSN - 1531-8249
pISSN - 0364-5134
DOI - 10.1002/ana.20276
Subject(s) - heterogeneous nuclear ribonucleoprotein , multiple sclerosis , ribonucleoprotein , tropical spastic paraparesis , autoantibody , cerebrospinal fluid , immunology , medicine , myelopathy , antibody , encephalomyelitis , amyotrophic lateral sclerosis , pathology , disease , biology , rna , spinal cord , biochemistry , psychiatry , gene
Heterogeneous nuclear ribonucleoproteins (hnRNPs) play an important role as the autoantigens in certain autoimmune disorders including neurological diseases such as HTLV‐1–associated myelopathy/tropical spastic paraparesis and paraneoplastic neurological syndromes. To clarify their implication in multiple sclerosis (MS), we assayed antibodies (Abs) against hnRNP A and B proteins in sera and cerebrospinal fluid (CSF) of MS patients and compared the results with 25 patients with other neurological diseases (ONDs). Using recombinant hnRNP A1, A2, and B1 proteins and Western blotting for the assay, we found Abs against hnRNP B1 in CSF from 32 of 35 MS patients (91.4%) but not in any sera or CSF of the 25 OND patients. Most notably, no Abs against hnRNP B1 were found in sera of all 22 MS patients examined. Although Abs against hnRNP A1 and A2 were concomitantly found in CSF reacting with B1, their incidence and immunoreactivity were lower or weaker than those of anti–hnRNP B1 Abs. There was no correlation between the reactivity of CSF with hnRNP B1 and CSF parameters—such as the number of the cells and the IgG level—or clinical parameters—such as duration of illness and disease activity. The selective generation of Abs against hnRNP B1 in CSF was shown to be highly specific for MS, which makes them a disease marker. Ann Neurol 2004