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近年,皮膚筋炎に特異的な自己抗体が次々に同定され,本症において疾患特異的自己抗体が高率に陽性になることが明らかになってきた。これらの自己抗体は,臨床病型や合併症に強く相関することが示され,多彩な臨床像を呈する本症を自己抗体によってより均質な臨床病型のサブセットに分類できるようになってきた。皮膚筋炎に特異的な自己抗体である抗Mi-2抗体,抗MDA5抗体,抗TIF1抗体,抗NXP2抗体,抗SAE抗体について概説した。
Abstract
Recent studies have identified novel dermatomyositis-specific autoantibodies and revealed that disease-specific autoantibodies become positive at a high rate in this disease. Moreover, these autoantibodies have been demonstrated to show a strong correlation with distinct clinical manifestations and complications such as interstitial lung disease and malignancy. Thus, these autoantibodies are now recognized as useful tools to classify this varied disease into more homogeneous subsets. In this review, the clinical significance of five dermatomyositis-specific autoantibodies, anti-Mi-2, anti-MDA5, anti-TIF1, anti-NXP2, and anti-SAE, was described.
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