PMID- 34228850 OWN - NLM STAT- MEDLINE DCOM- 20210910 LR - 20210929 IS - 1460-9568 (Electronic) IS - 0953-816X (Print) IS - 0953-816X (Linking) VI - 54 IP - 4 DP - 2021 Aug TI - Timing and localization of myasthenia gravis-related gene expression. PG - 5574-5585 LID - 10.1111/ejn.15382 [doi] AB - Myasthenia gravis (MG) is an acquired autoimmune disorder caused by autoantibodies binding acetylcholine receptors (AChR), muscle-specific kinase (MuSK), agrin or low-density lipoprotein receptor-related protein 4 (Lrp4). These autoantibodies inhibit neuromuscular transmission by blocking the function of these proteins and thereby cause fluctuating skeletal muscle weakness. Several reports suggest that these autoantibodies might also affect the central nervous system (CNS) in MG patients. A comprehensive overview of the timing and localization of the expression of MG-related antigens in other organs is currently lacking. To investigate the spatio-temporal expression of MG-related genes outside skeletal muscle, we used in silico tools to assess public expression databases. Acetylcholine esterase, nicotinic AChR alpha1 subunit, agrin, collagen Q, downstream of kinase-7, Lrp4, MuSK and rapsyn were included as MG-related genes because of their well-known involvement in either congenital or autoimmune MG. We investigated expression of MG-related genes in (1) all human tissues using GTEx data, (2) specific brain regions, (3) neurodevelopmental stages, and (4) cell types using datasets from the Allen Institute for Brain Sciences. MG-related genes show heterogenous spatio-temporal expression patterns in the human body as well as in the CNS. For each of these genes, several (new) tissues, brain areas and cortical cell types with (relatively) high expression were identified suggesting a potential role for these genes outside skeletal muscle. The possible presence of MG-related antigens outside skeletal muscle suggests that autoimmune MG, congenital MG or treatments targeting the same proteins may affect MG-related protein function in other organs. CI - (c) 2021 The Authors. European Journal of Neuroscience published by Federation of European Neuroscience Societies and John Wiley & Sons Ltd. FAU - Vergoossen, Dana L E AU - Vergoossen DLE AUID- ORCID: 0000-0002-7268-9818 AD - Department of Human Genetics, Leiden University Medical Center, Leiden, The Netherlands. FAU - Keo, Arlin AU - Keo A AUID- ORCID: 0000-0002-7501-1033 AD - Leiden Computational Biology Center, Leiden University Medical Center, Leiden, The Netherlands. AD - Delft Bioinformatics Lab, Delft University of Technology, Delft, The Netherlands. FAU - Mahfouz, Ahmed AU - Mahfouz A AUID- ORCID: 0000-0001-8601-2149 AD - Department of Human Genetics, Leiden University Medical Center, Leiden, The Netherlands. AD - Leiden Computational Biology Center, Leiden University Medical Center, Leiden, The Netherlands. AD - Delft Bioinformatics Lab, Delft University of Technology, Delft, The Netherlands. FAU - Huijbers, Maartje G AU - Huijbers MG AUID- ORCID: 0000-0002-6082-5042 AD - Department of Human Genetics, Leiden University Medical Center, Leiden, The Netherlands. AD - Department of Neurology, Leiden University Medical Center, Leiden, The Netherlands. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Review DEP - 20210720 PL - France TA - Eur J Neurosci JT - The European journal of neuroscience JID - 8918110 RN - 0 (Agrin) RN - 0 (Autoantibodies) RN - 0 (LDL-Receptor Related Proteins) SB - IM MH - Agrin MH - Autoantibodies MH - Gene Expression MH - Humans MH - *LDL-Receptor Related Proteins MH - *Myasthenia Gravis/genetics PMC - PMC8457065 OTO - NOTNLM OT - Dok7 OT - Lrp4 OT - MuSK OT - brain OT - myasthenia gravis OT - neuromuscular junction COIS- LUMC receives royalties from IBL for a MuSK diagnostic assay. LUMC and MGH receive royalties from licensed patent applications on MuSK-related research. The other authors report no conflict of interests. EDAT- 2021/07/07 06:00 MHDA- 2021/09/11 06:00 PMCR- 2021/09/22 CRDT- 2021/07/06 17:28 PHST- 2021/06/01 00:00 [revised] PHST- 2021/03/26 00:00 [received] PHST- 2021/07/01 00:00 [accepted] PHST- 2021/07/07 06:00 [pubmed] PHST- 2021/09/11 06:00 [medline] PHST- 2021/07/06 17:28 [entrez] PHST- 2021/09/22 00:00 [pmc-release] AID - EJN15382 [pii] AID - 10.1111/ejn.15382 [doi] PST - ppublish SO - Eur J Neurosci. 2021 Aug;54(4):5574-5585. doi: 10.1111/ejn.15382. Epub 2021 Jul 20.