Schwab Nicholas, Schneider-Hohendorf Tilman, Pignolet Béatrice, Spadaro Michela, Görlich Dennis, Meinl Ingrid, Windhagen Susanne, Tackenberg Björn, Breuer Johanna, Cantó Ester, Kümpfel Tania, Hohlfeld Reinhard, Siffrin Volker, Luessi Felix, Posevitz-Fejfár Anita, Montalban Xavier, Meuth Sven G, Zipp Frauke, Gold Ralf, Du Pasquier Renaud A, Kleinschnitz Christoph, Jacobi Annett, Comabella Manuel, Bertolotto Antonio, Brassat David, Wiendl Heinz
Department of Neurology, University of Münster, Germany
Department of Neurology, University of Münster, Germany.
Mult Scler. 2016 Jul;22(8):1048-60. doi: 10.1177/1352458515607651. Epub 2015 Oct 2.
Natalizumab treatment is associated with progressive multifocal leukoencephalopathy (PML) development. Treatment duration, prior immunosuppressant use, and JCV serostatus are currently used for risk stratification, but PML incidence stays high. Anti-JCV antibody index and L-selectin (CD62L) have been proposed as additional risk stratification parameters.
This study aimed at verifying and integrating both parameters into one algorithm for risk stratification.
Multicentric, international cohorts of natalizumab-treated MS patients were assessed for JCV index (1921 control patients and nine pre-PML patients) and CD62L (1410 control patients and 17 pre-PML patients).
CD62L values correlate with JCV serostatus, as well as JCV index values. Low CD62L in natalizumab-treated patients was confirmed and validated as a biomarker for PML risk with the risk factor "CD62L low" increasing a patient's relative risk 55-fold (p < 0.0001). Validation efforts established 86% sensitivity/91% specificity for CD62L and 100% sensitivity/59% specificity for JCV index as predictors of PML. Using both parameters identified 1.9% of natalizumab-treated patients in the reference center as the risk group.
Both JCV index and CD62L have merit for risk stratification and share a potential biological relationship with implications for general PML etiology. A risk algorithm incorporating both biomarkers could strongly reduce PML incidence.
那他珠单抗治疗与进行性多灶性白质脑病(PML)的发生有关。目前,治疗持续时间、既往免疫抑制剂使用情况和JCV血清学状态用于风险分层,但PML发病率仍然很高。抗JCV抗体指数和L-选择素(CD62L)已被提议作为额外的风险分层参数。
本研究旨在验证这两个参数并将其整合到一个风险分层算法中。
对接受那他珠单抗治疗的多中心、国际队列的MS患者进行JCV指数评估(1921例对照患者和9例PML前期患者)以及CD62L评估(1410例对照患者和17例PML前期患者)。
CD62L值与JCV血清学状态以及JCV指数值相关。接受那他珠单抗治疗的患者中CD62L降低被确认为PML风险的生物标志物,“CD62L降低”这一风险因素使患者的相对风险增加55倍(p < 0.0001)。验证结果显示,CD62L作为PML预测指标的敏感性为86%/特异性为91%,JCV指数的敏感性为100%/特异性为59%。使用这两个参数,在参考中心确定1.9%接受那他珠单抗治疗的患者为风险组。
JCV指数和CD62L在风险分层方面均有价值,并且在PML一般病因学方面具有潜在的生物学关系。纳入这两种生物标志物的风险算法可大幅降低PML发病率。