PMID- 29038659 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20191120 IS - 1664-3224 (Print) IS - 1664-3224 (Electronic) IS - 1664-3224 (Linking) VI - 8 DP - 2017 TI - In Silico Prediction Analysis of Idiotope-Driven T-B Cell Collaboration in Multiple Sclerosis. PG - 1255 LID - 10.3389/fimmu.2017.01255 [doi] LID - 1255 AB - Memory B cells acting as antigen-presenting cells are believed to be important in multiple sclerosis (MS), but the antigen they present remains unknown. We hypothesized that B cells may activate CD4(+) T cells in the central nervous system of MS patients by presenting idiotopes from their own immunoglobulin variable regions on human leukocyte antigen (HLA) class II molecules. Here, we use bioinformatics prediction analysis of B cell immunoglobulin variable regions from 11 MS patients and 6 controls with other inflammatory neurological disorders (OINDs), to assess whether the prerequisites for such idiotope-driven T-B cell collaboration are present. Our findings indicate that idiotopes from the complementarity determining region (CDR) 3 of MS patients on average have high predicted affinities for disease associated HLA-DRB1*15:01 molecules and are predicted to be endosomally processed by cathepsin S and L in positions that allows such HLA binding to occur. Additionally, complementarity determining region 3 sequences from cerebrospinal fluid (CSF) B cells from MS patients contain on average more rare T cell-exposed motifs that could potentially escape tolerance and stimulate CD4(+) T cells than CSF B cells from OIND patients. Many of these features were associated with preferential use of the IGHV4 gene family by CSF B cells from MS patients. This is the first study to combine high-throughput sequencing of patient immune repertoires with large-scale prediction analysis and provides key indicators for future in vitro and in vivo analyses. FAU - Hoglund, Rune A AU - Hoglund RA AD - Department of Neurology, Akershus University Hospital, Lorenskog, Norway. AD - Institute of Clinical Medicine, University of Oslo, Oslo, Norway. FAU - Lossius, Andreas AU - Lossius A AD - Department of Neurology, Akershus University Hospital, Lorenskog, Norway. AD - Faculty of Medicine, Department of Immunology and Transfusion Medicine, University of Oslo and Oslo University Hospital Rikshospitalet, Oslo, Norway. FAU - Johansen, Jorunn N AU - Johansen JN AD - Faculty of Medicine, Department of Immunology and Transfusion Medicine, University of Oslo and Oslo University Hospital Rikshospitalet, Oslo, Norway. FAU - Homan, Jane AU - Homan J AD - EigenBio LLC, Madison, WI, United States. FAU - Benth, Jurate Saltyte AU - Benth JS AD - Institute of Clinical Medicine, University of Oslo, Oslo, Norway. AD - Health Services Research Unit, Akershus University Hospital, Lorenskog, Norway. FAU - Robins, Harlan AU - Robins H AD - Adaptive Biotechnologies, Seattle, WA, United States. FAU - Bogen, Bjarne AU - Bogen B AD - Institute of Clinical Medicine, University of Oslo, Oslo, Norway. AD - Faculty of Medicine, Department of Immunology and Transfusion Medicine, University of Oslo and Oslo University Hospital Rikshospitalet, Oslo, Norway. AD - Centre for Immune Regulation, University of Oslo, Oslo, Norway. FAU - Bremel, Robert D AU - Bremel RD AD - EigenBio LLC, Madison, WI, United States. FAU - Holmoy, Trygve AU - Holmoy T AD - Department of Neurology, Akershus University Hospital, Lorenskog, Norway. AD - Institute of Clinical Medicine, University of Oslo, Oslo, Norway. LA - eng SI - figshare/10.6084/m9.figshare.5035703 SI - Dryad/10.5061/dryad.35ks2 PT - Journal Article DEP - 20171002 PL - Switzerland TA - Front Immunol JT - Frontiers in immunology JID - 101560960 PMC - PMC5630699 OTO - NOTNLM OT - B cell OT - T cell OT - bioinformatics OT - idiotope OT - immunoglobulin OT - immunoglobulin heavy variable OT - immunosequencing OT - multiple sclerosis EDAT- 2017/10/19 06:00 MHDA- 2017/10/19 06:01 PMCR- 2017/01/01 CRDT- 2017/10/18 06:00 PHST- 2017/05/26 00:00 [received] PHST- 2017/09/20 00:00 [accepted] PHST- 2017/10/18 06:00 [entrez] PHST- 2017/10/19 06:00 [pubmed] PHST- 2017/10/19 06:01 [medline] PHST- 2017/01/01 00:00 [pmc-release] AID - 10.3389/fimmu.2017.01255 [doi] PST - epublish SO - Front Immunol. 2017 Oct 2;8:1255. doi: 10.3389/fimmu.2017.01255. eCollection 2017.