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Serum Neurofilament Light Chain Levels in Patients With Presymptomatic Multiple Sclerosis.
JAMA Neurology ( IF 20.4 ) Pub Date : 2019-09-13 , DOI: 10.1001/jamaneurol.2019.3238
Kjetil Bjornevik 1 , Kassandra L Munger 1 , Marianna Cortese 1 , Christian Barro 2 , Brian C Healy 3, 4, 5 , David W Niebuhr 6 , Ann I Scher 6 , Jens Kuhle 2 , Alberto Ascherio 1, 7, 8
Affiliation  

Importance Unrecognized demyelinating events often precede the clinical onset of multiple sclerosis (MS). Identification of these events at the time of occurrence would have implications for early diagnosis and the search of causal factors for the disease. Objective To assess whether serum neurofilament light chain (sNfL) levels are elevated before the clinical MS onset. Design, Setting, and Participants Nested case-control study among US military personnel who have serum samples stored in the US Department of Defense Serum Repository. Serum samples were collected from 2000 to 2011; sNfL assays and data analyses were performed from 2018 to 2019. We selected 60 case patients with MS who either had 2 samples collected before onset (mean follow-up, 6.3 years) or 1 sample collected before and 1 after onset (mean follow-up, 1.3 years), among 245 previously identified case patients. For each case, we randomly selected 1 of 2 previously identified control individuals matched by age, sex, race/ethnicity, and dates of sample collection. The sample size was chosen based on the available funding. Exposures Serum NfL concentrations measured using an ultrasensitive single-molecule array assay (Simoa). Main Outcomes and Measurements Log-transformed sNfL concentrations in case patients and control individuals compared using conditional logistic regression and linear mixed models. Results Mean age at baseline was 27.5 years, and 92 of 120 participants (76.7%) were men. Serum NfL levels were higher in case patients with MS compared with their matched control individuals in samples drawn a median of 6 years (range, 4-10 years) before the clinical onset (median, 16.7 pg/mL; interquartile range [IQR], 12.6-23.1 pg/mL vs 15.2 pg/m; IQR, 10.3-19.9 pg/mL; P = .04). This difference increased with decreasing time to the case clinical onset (estimated coefficient for interaction with time = 0.063; P = .008). A within-person increase in presymptomatic sNfL levels was associated with higher MS risk (rate ratio for ≥5 pg/mL increase, 7.50; 95% CI, 1.72-32.80). The clinical onset was associated with a marked increase in sNfL levels (median, 25.0; IQR, 17.1-41.3 vs 45.1; IQR, 27.0-102.7 pg/mL for presymptomatic and postonset MS samples; P = .009). Conclusions and Relevance The levels of sNfL were increased 6 years before the clinical MS onset, indicating that MS may have a prodromal phase lasting several years and that neuroaxonal damage occurs already during this phase.

中文翻译:

有症状的多发性硬化症患者的血清神经丝轻链水平。

重要性无法识别的脱髓鞘事件通常在多发性硬化症(MS)的临床发作之前发生。在事件发生时识别这些事件将对疾病的早期诊断和寻找病因有影响。目的评估临床MS发作前血清神经丝轻链(sNfL)水平是否升高。设计,设置和参与者在美国国防部血清存储库中存储有血清样本的美国军事人员中,进行了病例对照研究嵌套式研究。从2000年至2011年收集血清样本; sNfL分析和数据分析于2018年至2019年进行。我们选择了60例MS患者,这些患者在发病前(平均随访6.3年)采集了2个样本,在发病前和术后采集了1个样本(平均随访)。 ,1.3年),在245名先前确定的病例患者中。对于每种情况,我们从年龄,性别,种族/民族和样本​​收集日期中随机选择了2个先前确定的对照个体中的1个。样本量是根据可用资金选择的。暴露使用超灵敏单分子阵列测定法(Simoa)测量的血清NfL浓度。主要结果和测量结果使用条件逻辑回归和线性混合模型比较了病例患者和对照个体中对数转化的sNfL浓度。结果基线平均年龄为27.5岁,在120名参与者中,有92名(76.7%)是男性。MS患者的血清NfL水平高于其在临床发病前中位数为6年(范围4-10年)的样本(中位值为16.7 pg / mL;相较于对照组)。四分位间距[IQR]:12.6-23.1 pg / mL和15.2 pg / m;IQR,10.3-19.9 pg / mL;P = .04)。这种差异随着病例发病时间的减少而增加(与时间的相互作用的估计系数为0.063; P = 0.008)。人体内症状前sNfL水平的升高与更高的MS风险相关(≥5 pg / mL的比率,7.50; 95%CI,1.72-32.80)。临床发作与sNfL水平显着升高有关(症状前和发作后MS样本中位数为25.0; IQR为17.1-41.3 vs 45.1; IQR为27.0-102.7 pg / mL; P = 0.009)。结论和相关性sNfL的水平在临床MS发作前6年已经升高,这表明MS可能处于持续数年的前驱期,并且在该阶段已经发生了神经轴突损伤。9 pg / mL; P = .04)。这种差异随着病例发病时间的减少而增加(与时间的相互作用的估计系数为0.063; P = 0.008)。人体内症状前sNfL水平的升高与更高的MS风险相关(≥5 pg / mL的比率,7.50; 95%CI,1.72-32.80)。临床发作与sNfL水平显着升高有关(症状前和发作后MS样本中位数为25.0; IQR为17.1-41.3 vs 45.1; IQR为27.0-102.7 pg / mL; P = 0.009)。结论和相关性sNfL的水平在临床MS发作前6年已经升高,这表明MS可能处于持续数年的前驱期,并且在该阶段已经发生了神经轴突损伤。9 pg / mL; P = .04)。这种差异随着病例发病时间的减少而增加(与时间的相互作用的估计系数为0.063; P = 0.008)。人体内症状前sNfL水平的升高与更高的MS风险相关(≥5 pg / mL的比率,7.50; 95%CI,1.72-32.80)。临床发作与sNfL水平显着升高有关(症状前和发作后MS样本中位数为25.0; IQR为17.1-41.3 vs 45.1; IQR为27.0-102.7 pg / mL; P = 0.009)。结论和相关性sNfL的水平在临床MS发作前6年已经升高,这表明MS可能处于持续数年的前驱期,并且在该阶段已经发生了神经轴突损伤。这种差异随着病例发病时间的减少而增加(与时间的相互作用的估计系数为0.063; P = 0.008)。人体内症状前sNfL水平的升高与更高的MS风险相关(≥5 pg / mL的比率,7.50; 95%CI,1.72-32.80)。临床发作与sNfL水平显着升高有关(症状前和发作后MS样本中位数为25.0; IQR为17.1-41.3 vs 45.1; IQR为27.0-102.7 pg / mL; P = 0.009)。结论和相关性sNfL的水平在临床MS发作前6年已经升高,这表明MS可能处于持续数年的前驱期,并且在该阶段已经发生了神经轴突损伤。这种差异随着病例发病时间的减少而增加(与时间的相互作用的估计系数为0.063; P = 0.008)。人体内症状前sNfL水平的升高与更高的MS风险相关(≥5 pg / mL的比率,7.50; 95%CI,1.72-32.80)。临床发作与sNfL水平显着升高有关(症状前和发作后MS样本中位数为25.0; IQR为17.1-41.3 vs 45.1; IQR为27.0-102.7 pg / mL; P = 0.009)。结论和相关性sNfL的水平在临床MS发作前6年已经升高,这表明MS可能处于持续数年的前驱期,并且在该阶段已经发生了神经轴突损伤。人体内症状前sNfL水平的升高与更高的MS风险相关(≥5 pg / mL的比率,7.50; 95%CI,1.72-32.80)。临床发作与sNfL水平显着升高有关(症状前和发作后MS样本中位数为25.0; IQR为17.1-41.3 vs 45.1; IQR为27.0-102.7 pg / mL; P = 0.009)。结论和相关性sNfL的水平在临床MS发作前6年已经升高,这表明MS可能处于持续数年的前驱期,并且在该阶段已经发生了神经轴突损伤。人体内症状前sNfL水平的升高与更高的MS风险相关(≥5 pg / mL的比率,7.50; 95%CI,1.72-32.80)。临床发作与sNfL水平显着升高有关(症状前和发作后MS样本中位数为25.0; IQR为17.1-41.3 vs 45.1; IQR为27.0-102.7 pg / mL; P = 0.009)。结论和相关性sNfL的水平在临床MS发作前6年已经升高,这表明MS可能处于持续数年的前驱期,并且在该阶段已经发生了神经轴突损伤。
更新日期:2020-01-13
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