| 简体中文 | English | |
| 同义词 | 胞浆斑点型 | cytoplasmic speckled |
| 描述 | 细胞胞浆中呈现散在细小颗粒的染色，多具均匀或致密细颗粒的背景。例如抗Jo-1抗体。 |
Scattered small speckles in the cytoplasm mostly with homogeneous or dense fine speckled background. e.g. anti-Jo-1. |
| 抗原相关性 | Jo-1/组氨酰-tRNA合成酶 | Jo-1/histidyl-tRNA synthetase |
►在抗合成酶抗体综合征 (自身免疫性肌病的一种)、间质性肺病、多发性关节炎、雷诺现象和技工手的患者中可检出；这些特征可能以多种形式或单一形式出现，尤其是间质性肺病 (33, 90)
►所报道的与AC-20核型相关的自身抗体主要为抗Jo-1抗体，该抗体识别组氨酰- tRNA合成酶；由于AC-20不是Jo-1抗体的特异核型，因此推荐后续检测抗Jo-1特异性抗体；抗原包含于常规 ENA 谱和疾病特异性免疫试剂 (即肌炎谱 *)中；抗Jo-1抗体已被纳入自身免疫性肌病分类标准中 (91, 92)
注：AC-19和AC-20之间的细微区别可能取决于HEp-2细胞底物和/或抗体浓度；在HEp-2细胞的间接免疫荧光筛查中可能检测不到针对Jo-1的抗体。
*肌炎谱、系统性硬化症谱和 (扩展的) 肝病谱可能仅限于专业临床实验室应用。
► Found in patients with the anti-synthetase syndrome (a subset of AIM), interstitial lung disease, polyarthritis, Raynaud’s phenomenon, and mechanic’s hands; these features may occur in various combinations or as an isolated manifestation, especially interstitial lung disease (33, 90)
► Autoantibodies associated with the AC-20 pattern are primarily reported for the anti-Jo-1 antibody, which recognizes histidyl-tRNA synthetase; since AC-20 is not specific for Jo-1, it is recommended to perform a follow-up test for anti-Jo-1 antibodies; the antigen is included in the routine ENA profile, as well as in disease specific immunoassays (i.e., inflammatory myopathy profile*); the anti-Jo-1 antibodies are included in the classification criteria for AIM (91, 92)
Notes: The fine distinction between AC-19 and -20 may depend on HEp-2 substrates and/or antibody concentration; antibodies to Jo-1 may be undetected in HEp-2 IIFA-screening.
*Availability of the inflammatory myopathy profile, the SSc profile and the (extended) liver profile may be limited to specialty clinical laboratories.
33. Satoh M, Tanaka S, Ceribelli A, et al. A comprehensive overview on myositis-specific antibodies: new and old biomarkers in idiopathic inflammatory myopathy. Clin Rev Allergy Immunol 2017;52:1–19.
90. Marie I, Hatron PY, Cherin P, et al. Functional outcome and prognostic factors in anti-Jo1 patients with antisynthetase syndrome. Arthritis Res Ther 2013;15.
91. Fritzler MJ, Choi MY, Mahler M. The antinuclear antibody test in the diagnosis of antisynthetase syndrome and other autoimmune myopathies. J Rheumatol 2018;45:444.1–5.
92. Lundberg IE, Tjärnlund A, Bottai M, et al. 2017 European league against rheumatism/American college of rheumatology classification criteria for adult and juvenile idiopathic inflammatory myopathies and their major subgroups. Ann Rheum Dis 2017;76:1955–64.
33. Satoh M, Tanaka S, Ceribelli A, et al. A comprehensive overview on myositis-specific antibodies: new and old biomarkers in idiopathic inflammatory myopathy. Clin Rev Allergy Immunol 2017;52:1–19.
90. Marie I, Hatron PY, Cherin P, et al. Functional outcome and prognostic factors in anti-Jo1 patients with antisynthetase syndrome. Arthritis Res Ther 2013;15.
91. Fritzler MJ, Choi MY, Mahler M. The antinuclear antibody test in the diagnosis of antisynthetase syndrome and other autoimmune myopathies. J Rheumatol 2018;45:444.1–5.
92. Lundberg IE, Tjärnlund A, Bottai M, et al. 2017 European league against rheumatism/American college of rheumatology classification criteria for adult and juvenile idiopathic inflammatory myopathies and their major subgroups. Ann Rheum Dis 2017;76:1955–64.
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