The contribute of cerebrospinal fluid free light-chain assay in the diagnosis of multiple sclerosis and other neurological diseases in an Italian multicenter study

被引:12
作者
Bernardi, Gaetano [1 ]
Biagioli, Tiziana [2 ]
Malpassi, Paola [3 ]
De Michele, Teresa [4 ]
Vecchio, Domizia [5 ,6 ]
Repice, Anna Maria [7 ]
Lugaresi, Alessandra [8 ,9 ]
Mirabella, Massimiliano [10 ]
Clerici, Valentina Torri [11 ]
Crespi, Ilaria [12 ]
机构
[1] Fdn IRCCS Ist Neurol Carlo Besta, Dept Diagnost & Technol, Lab Clin Invest, Via Giovanni Celoria 11, Milan, Italy
[2] Univ Florence, Azienda Osped Univ Careggi, Gen Lab, Florence, Italy
[3] Azienda Unita Sanit Locale Bologna, Lab Unico Metropolitano, Bologna, Italy
[4] Fdn Policlin Univ Agostino Gemelli IRCCS, Clin Biochem Lab, Rome, Italy
[5] Univ Piemonte Orientale, Dept Translat Med, Neurol Unit, Novara, Italy
[6] Univ Piemonte Orientate, Interdisciplinary Res Ctr Autoimmune Dis IRCAD, Novara, Italy
[7] Azienda Osped Univ Careggi, Univ Florence, SOD Dept Neurol 2, Florence, Italy
[8] Univ Bologna, Dept Biomed & Neuromotor Sci, Bologna, Italy
[9] IRCCS Ist Sci Neurol Bologna, Bologna, Italy
[10] Fdn Policlin Univ Agostino Gemelli IRCCS, UOS Sclerosi Multipla, Rome, Italy
[11] Fdn IRCCS Ist Neurol Carlo Besta, Neuroimmunol & Neuromuscular Dis Unit, Milan, Italy
[12] Univ Piemonte Orientale, Dept Translat Med, Clin Biochem, Novara, Italy
关键词
Multiple sclerosis; oligoclonal bands; CSF free light chains; biomarkers; FLC index; kFLC and lambda FLC; INDEX; BIOMARKER; CSF; MARKERS; BANDS;
D O I
10.1177/13524585211064121
中图分类号
R74 [神经病学与精神病学];
学科分类号
摘要
Background: Cerebrospinal fluid (CSF) free light chains (FLCs) can be an alternative assay to oligoclonal bands (OCBs) in inflammatory neurological disorders, but threshold has no consensus. Objective: To assess the diagnostic accuracy of CSF FLCs in multiple sclerosis (MS) and other neurological diseases. Methods: A total of 406 patients from five Italian centers. FLCs were measured in CSF and serum using Freelite MX assays on Optilite. Results: A total of 171 patients were diagnosed as MS, 154 non-inflammatory neurological diseases, 48 inflammatory central nervous system (CNS) diseases, and 33 peripheral neurological diseases. Both kFLC and lambda FLC indices were significantly higher in patients with MS compared to other groups (p < 0.0001). The kFLC index >= 6.4 is comparable to OCB for MS diagnosis (area under the receiver operating characteristic curve (AUC)= 0.876; sensitivity 83.6% vs 84.2%; specificity 88.5% vs 90.6%). lambda FLC index >= 5 showed an AUC of 0.616, sensitivity of 33.3% and specificity of 90.6%. In all, 12/27 (44.4%) MS patients with negative OCB had kFLC index >= 6.4. Interestingly, 37.5% of 24 patients with a single CSF IgG band showed high kFLC index and 12.5% positive lambda FLC index. Conclusion: Our findings support the diagnostic utility of FLC indices in MS and other CNS inflammatory disorders, suggesting a combined use of FLC and OCB to help clinicians with complementary information.
引用
收藏
页码:1364 / 1372
页数:9
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