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- Title
Oligoclonal bands in the cerebrospinal fluid of amyotrophic lateral sclerosis patients with disease-associated mutations.
- Authors
Ticozzi, Nicola; Tiloca, Cinzia; Mencacci, Niccolò; Morelli, Claudia; Doretti, Alberto; Rusconi, Daniela; Colombrita, Claudia; Sangalli, Davide; Verde, Federico; Finelli, Palma; Messina, Stefano; Ratti, Antonia; Silani, Vincenzo
- Abstract
In amyotrophic lateral sclerosis (ALS) cerebrospinal fluid (CSF) analysis is usually performed to exclude inflammatory processes of the central nervous system. Although in a small subset of patients an intrathecal synthesis of IgG is detectable, usually there is no clear explanation for this evidence. This study investigates the occurrence of oligoclonal bands (OCBs) in the CSF of a large series of ALS patients, attempting a correlation with genotype data. CSF was collected from 259 ALS patients. CSF parameters were measured according to standard procedures, and detection of OCBs performed by isoelectric focusing. The patients were screened for mutations in SOD1, FUS, TARDBP, ANG, OPTN, and C9ORF72. We observed the presence of OCBs in the CSF of 9/259 ALS patients (3.5 %), and of disease-associated mutations in 12 cases. OCBs were significantly more frequent in mutation carriers compared to the remaining cohort (3/12 vs 6/247; p < 0.01). Among patients with OCBs, two patients had the TARDBP p.A382T mutation (one of which in homozygous state), and one the ANG p.P-4S variant. Both patients carrying the p.A382T mutation had an atypical phenotype, one of them manifesting signs suggestive of a cerebellar involvement, and the other presenting neuroradiological findings suggestive of an inflammatory disorder of the central nervous system. Our results suggest that ALS patients with OCBs may harbor mutations in disease-causing genes. We speculate that mutations in both TARDBP and ANG genes may disrupt the blood-brain barrier (BBB), promoting local immune responses and neuroinflammation. The role of mutant TARDBP and ANG genes on BBB integrity of ALS patients warrants further investigation.
- Subjects
CEREBROSPINAL fluid; AMYOTROPHIC lateral sclerosis; GENETIC mutation; CENTRAL nervous system diseases; INFLAMMATION; IMMUNOGLOBULIN G; NEUROIMMUNOLOGY; MOTOR neuron diseases
- Publication
Journal of Neurology, 2013, Vol 260, Issue 1, p85
- ISSN
0340-5354
- Publication type
Article
- DOI
10.1007/s00415-012-6589-0