RT Journal Article T1 Neuromyelitis optica is an HLA associated disease different from Multiple Sclerosis: a systematic review with meta-analysis. A1 Alvarenga, Marcos Papais A1 do Carmo, Luciana Ferreira A1 Vasconcelos, Claudia Cristina Ferreira A1 Alvarenga, Marina Papais A1 Alvarenga-Filho, Helcio A1 de Melo Bento, Cleonice Alves A1 Paiva, Carmen Lucia Antão A1 Leyva-Fernández, Laura A1 Fernández, Óscar A1 Papais-Alvarenga, Regina Maria AB Neuromyelitis Optica and Multiple Sclerosis are idiopathic inflammatory demyelinating diseases of the central nervous system that currently are considered distinct autoimmune diseases, so differences in genetic susceptibility would be expected. This study aimed to investigate the HLA association with Neuromyelitis Optica by a systematic review with meta-analysis. The STROBE instrument guided research paper assessments. Thirteen papers published between 2009 and 2020 were eligible. 568 Neuromyelitis Optica patients, 41.4% Asians, 32.4% Latin Americans and 26.2% Europeans were analyzed. Only alleles of the DRB1 locus were genotyped in all studies. Neuromyelitis Optica patients have 2.46 more chances of having the DRB1*03 allelic group than controls. Ethnicity can influence genetic susceptibility. The main HLA association with Neuromyelitis Optica was the DRB1*03:01 allele in Western populations and with the DPB1*05:01 allele in Asia. Differences in the Multiple Sclerosis and Neuromyelitis Optica genetic susceptibility was confirmed in Afro descendants. The DRB1*03 allelic group associated with Neuromyelitis Optica has also been described in other systemic autoimmune diseases. YR 2021 FD 2021-01-08 LK http://hdl.handle.net/10668/16944 UL http://hdl.handle.net/10668/16944 LA en DS RISalud RD Apr 8, 2025