#历史搜索
清除历史
10-28

2026

国内首发 | 欧蒙化学发光抗DFS70抗体,助力ANA规范化精准解读
发布者:欧蒙
浏览量:74

近日,欧蒙抗DFS70抗体IgG检测试剂(化学发光法)获证!

       该产品进一步丰富了欧蒙全自动化学发光自身抗体检测菜单,直击间接免疫荧光法抗核抗体(ANA)检测中致密细颗粒型判读难题,助力临床实现ANA规范化筛查与精准鉴别。


破解致密细颗粒判读困境 高效辅助判断易混淆核型

       在临床实践中,如何正确判读致密细颗粒型仍是一个重大挑战。一项国际调查显示,检验人员对单一致密细颗粒型判读准确率约50%,混合核型中致密细颗粒型识别准确率不足10%,易误判并高估阳性率[1,2]。补充特异性抗DFS70抗体检测,可有效辅助判断致密细颗粒型及其易混核型,显著提升ANA核型判读的准确性与可靠性。

*AC-1:均质型;AC-2:致密细颗粒型;AC-29:Topo I型;AC-30:细颗粒伴有丝分裂板型;

       以欧蒙间接免疫荧光法判读的致密细颗粒型为参比方法,评估化学发光抗DFS70抗体检测试剂的性能,结果显示总符合率达92.90%。


优化自身免疫筛查路径 赋能自身免疫疾病精准诊断

       抗DFS70抗体阳性既可出现在健康人群中,也可见于自身免疫病、部分炎症性疾病及恶性肿瘤患者中。检验科发放报告前,建议同步确认抗DFS70抗体,并联合检测ANA相关风湿病(AARD)的特异性自身抗体,助力临床开展AARD风险分层,优化结果判读。

       自身免疫性疾病筛查的推荐路径及临床解读参考要点汇总图[3~5]:

*临床决策需结合患者临床表现、体征及其他检查综合评估,不可仅凭单一实验室指标判定或排除AARD。


探索抗DFS70抗体:在自身免疫病中的潜在应用

       上海仁济医院基于活检确诊狼疮肾炎(LN)队列的研究显示,抗DFS70抗体阳性与增殖性LN及肾脏病理活动指数升高相关,但与SLE全身临床活动无显著关联。多因素回归分析提示,LN患者中抗DFS70抗体阳性与高滴度抗dsDNA抗体独立相关。该抗体不能预测SLE患者是否发生肾炎,但可作为无创标志物辅助评估狼疮肾炎肾脏内炎症活动,对辅助鉴别LN病理亚型具备潜在临床价值[6]。

       此外,多项研究显示,抗DFS70抗体检测在系统性硬化症、特发性炎症性肌病领域同样具备潜在应用价值[7,8]。


[1] Bentow C, et.al. Recognition of the dense fine speckled (DFS) pattern remains challenging: results from an international internet-based survey. Auto Immun Highlights[J]. 2016 Dec;7(1):8. doi: 10.1007/s13317-016-0081-2. Epub 2016 Jul 9.

[2] Bizzaro N,et.al. Anti-DFS70 antibodies detected by specific methods in patients with thrombosis or recurrent pregnancy loss: no evidence of an association[J]. Sci Rep. 2020 May 8;10(1):7748. doi: 10.1038/s41598-020-64550-y.

[3] Zhang K, et.al. Dense fine speckled immunofluorescence pattern in a Chinese population: Prevalence and clinical association[J]. J Clin Lab Anal. 2022 Feb;36(2):e24173. doi: 10.1002/jcla.24173. Epub 2021 Dec 24.

[4] Mahler M,et.al. The clinical significance of the dense fine speckled immunofluorescence pattern on HEp-2 cells for the diagnosis of systemic autoimmune diseases[J]. Clin Dev Immunol. 2012;2012:494356. doi: 10.1155/2012/494356. Epub 2012 Dec 6.

[5] Conrad K,et.al. The Clinical Relevance of Anti-DFS70 Autoantibodies[J]. Clin Rev Allergy Immunol. 2017 Apr;52(2):202-216. doi: 10.1007/s12016-016-8564-5.

[6] Chen D,et.al.Anti-DFS70 Antibodies Are Associated With Proliferative Lupus Nephritis and Renal Pathological Activity[J]. Front Immunol. 2022 Feb 3;13:810639. doi: 10.3389/fimmu.2022.810639.

[7] Fijałkowska A,et.al. Dense fine speckled nuclear immunofluorescence: A mildly reassuring antinuclear antibody pattern meriting consideration. Immun Inflamm Dis. 2023 Sep;11(9):e1026. doi: 10.1002/iid3.1026.

[8] Zucca F, Longoni V, Nikolopoulos D, Lagutkin D, Sherina N, Beretta L, Triantafyllias K, Sjöwall C, Parodis I. Anti-DFS70 antibodies in systemic lupus erythematosus and lupus nephritis: revisiting their clinical implications. Autoimmun Rev. 2026 Aug 31;25(12):104174. doi: 10.1016/j.autrev.2026.104174. Epub ahead of print.