J Rheumatol:与利妥昔单抗相关的血管炎急性发作

2020-03-19 xiangting MedSci原创

RTX相关性冷球蛋白血症性血管炎发作与高死亡率相关。这项研究提供了证据表明,肾脏病变是由免疫复合物沉积以及冷球蛋白血症和RTX引起的肾小球阻塞所致。

这项研究旨在报告利妥昔单抗(RTX)相关性自身免疫性疾病急性发作的发生率、预测因素和结局。

研究人员于2005年至2015年在三级转诊中心进行了一项回顾性研究。疾病急性发作定义为开始RTX治疗4周内出现新器官受累或自身免疫性疾病加重。

在185例患者中,确定了7例疾病急性发作(3.4%)。全部是由II型混合型冷球蛋白血症性血管炎引起的。血管炎急性发作的中位时间为RTX输注后的8天(范围2-16),包括急性肾功能不全(n=7)、皮肤紫癜(n=7)、胃肠道(GI)受累(n=4)和心肌炎(n=1)。RTX相关性冷球蛋白血症性血管炎发作患者中以下情况更常见:肾脏受累(p=0.0008)、B细胞淋巴增生(p=0.015),并且与RTX后无发作的患者(n=43)相比,冷球蛋白水平更高(2.1 vs 0.4g/l,p=0.0004)和C4水平更低(0.02 vs 0.05,p=0.023)。4例患者(57%)在中位时间3.3个月后死亡。与阴性对照相比,RTX后血管炎发作患者的1年生存率较差[43%(95%CI 18-100)vs 97%(95%CI 92-100),p<0.001]。对RTX相关性血管炎加重患者进行肾脏活检的免疫荧光分析显示肾脏病变内膜内沉积物和血栓的RTX、IgM和IgG1染色阳性。

RTX相关性冷球蛋白血症性血管炎发作与高死亡率相关。这项研究提供了证据表明,肾脏病变是由免疫复合物沉积以及冷球蛋白血症和RTX引起的肾小球阻塞所致。

原始出处:

Anne Claire Desbois. Rituximab-associated Vasculitis Flare: Incidence, Predictors, and Outcome. J Rheumatol. March 2020.

 

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