PMID- 24724742 OWN - NLM STAT- MEDLINE DCOM- 20151026 LR - 20181202 IS - 1468-1331 (Electronic) IS - 1351-5101 (Linking) VI - 21 IP - 8 DP - 2014 Aug TI - Identification of the major HHV-6 antigen recognized by cerebrospinal fluid IgG in multiple sclerosis. PG - 1096-1101 LID - 10.1111/ene.12435 [doi] AB - BACKGROUND AND PURPOSE: Different data show an association between human herpesvirus 6 (HHV-6) and multiple sclerosis (MS). Intrathecal anti-HHV-6 immunoglobulin G (IgG) was detected in MS patients, but the antigen recognized by cerebrospinal fluid (CSF) IgG has not been characterized yet. Our objective was to identify the HHV-6 antigens recognized by IgG present in the CSF of patients with MS. METHODS: Cerebrospinal fluid IgG of 15 MS patients and eight patients with other neurological diseases was purified on protein G Sepharose columns. Purified IgG from every patient was linked to a CNBr-activated Sepharose 4B column. Fifty micrograms of viral extract was applied to each column. Bound proteins were eluted and analysed by SDS-PAGE and silver staining. The viral protein was characterized by mass spectrometry. RESULTS: A protein of 150 kD was eluted from CSF IgG columns of three of eight patients with primary progressive MS and one of seven with relapsing-remitting MS. After digestion and mass spectrometry analysis 10 peptides were found with 100% homology with the major capsid protein of the HHV-6A. DISCUSSION: These findings confirm the presence of anti-HHV-6 IgG in CSF of MS patients, particularly in progressive forms, and identify major capsid protein as the major antigen recognized by CSF IgG from MS patients. CI - (c) 2014 The Author(s) European Journal of Neurology (c) 2014 EAN. FAU - Alenda, R AU - Alenda R AD - MS Unit, Departments of Immunology and Neurology, Hospital Ramon y Cajal, IRYCIS, Madrid, Spain. AD - Red Espanola de Esclerosis Multiple, Madrid, Spain. FAU - Alvarez-Lafuente, R AU - Alvarez-Lafuente R AD - Red Espanola de Esclerosis Multiple, Madrid, Spain. AD - Department of Neurology, Hospital Clinico San Carlos, IdISSC, Madrid, Spain. FAU - Costa-Frossard, L AU - Costa-Frossard L AD - MS Unit, Departments of Immunology and Neurology, Hospital Ramon y Cajal, IRYCIS, Madrid, Spain. AD - Red Espanola de Esclerosis Multiple, Madrid, Spain. FAU - Arroyo, R AU - Arroyo R AD - Red Espanola de Esclerosis Multiple, Madrid, Spain. AD - Department of Neurology, Hospital Clinico San Carlos, IdISSC, Madrid, Spain. FAU - Mirete, S AU - Mirete S AD - MS Unit, Departments of Immunology and Neurology, Hospital Ramon y Cajal, IRYCIS, Madrid, Spain. FAU - Alvarez-Cermeno, J C AU - Alvarez-Cermeno JC AD - MS Unit, Departments of Immunology and Neurology, Hospital Ramon y Cajal, IRYCIS, Madrid, Spain. AD - Red Espanola de Esclerosis Multiple, Madrid, Spain. AD - Department of Medicine, University of Alcala, Alcala de Henares, Madrid, Spain. FAU - Villar, L M AU - Villar LM AD - MS Unit, Departments of Immunology and Neurology, Hospital Ramon y Cajal, IRYCIS, Madrid, Spain. AD - Red Espanola de Esclerosis Multiple, Madrid, Spain. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20140412 PL - England TA - Eur J Neurol JT - European journal of neurology JID - 9506311 RN - 0 (Antigens, Viral) RN - 0 (Capsid Proteins) RN - 0 (Immunoglobulin G) SB - IM MH - Adolescent MH - Adult MH - Aged MH - Antigens, Viral/*immunology MH - Capsid Proteins/*immunology MH - Female MH - Herpesvirus 6, Human/*immunology MH - Humans MH - Immunoglobulin G/cerebrospinal fluid/*immunology MH - Male MH - Middle Aged MH - Multiple Sclerosis/cerebrospinal fluid/*immunology/virology MH - Young Adult OTO - NOTNLM OT - antibodies OT - demyelinating diseases OT - multiple sclerosis OT - neuroimmunology EDAT- 2014/04/15 06:00 MHDA- 2015/10/27 06:00 CRDT- 2014/04/15 06:00 PHST- 2013/12/19 00:00 [received] PHST- 2014/03/06 00:00 [accepted] PHST- 2014/04/15 06:00 [entrez] PHST- 2014/04/15 06:00 [pubmed] PHST- 2015/10/27 06:00 [medline] AID - 10.1111/ene.12435 [doi] PST - ppublish SO - Eur J Neurol. 2014 Aug;21(8):1096-1101. doi: 10.1111/ene.12435. Epub 2014 Apr 12.