title: Therapeutic down-regulation of central and peripheral B-cell-activating factor (BAFF) production in pediatric opsoclonus-myoclonus syndrome.
abstract: Opsoclonus-myoclonus syndrome (OMS) is an autoimmune, paraneoplastic, central nervous system disorder, characterized by cerebrospinal fluid (CSF) B-cell expansion and various putative autoantibodies. To investigate the role of B-cell activating factor (BAFF) in OMS and the effect of disease-modifying immunotherapies used to treat it, BAFF was measured by enzyme-linked immunoadsorbent assay in the CSF and serum of 161 children with OMS and 116 pediatric controls. The mean concentration of CSF BAFF and the CSF/serum BAFF ratio were significantly higher in untreated OMS compared to neurological controls. CSF and serum BAFF levels were significantly lower in children treated with ACTH or corticosteroids, as was the CSF/serum BAFF ratio. There was a strong, negative correlation between CSF or serum BAFF levels and ACTH dose. Monthly IVIg infusions had no net impact on BAFF levels, and the combination of IVIg with ACTH or steroids did not reduce or enhance their anti-BAFF effects. These data indicate that BAFF production is increased centrally, not peripherally, in OMS, implying astrocytic over production. The novel dose-related central and peripheral anti-BAFF properties of ACTH, especially, have implications for other BAFF-related autoimmune disorders, infectious diseases, and cancers.
authors.affiliation: National Pediatric Myoclonus Center and Neuroimmunology Laboratory, Department of Neurology, Division of Child and Adolescent Neurology, 751 N. Rutledge, Suite 3504, P.O. Box 19643, Springfield, IL 62794-9643, USA. mpranzatelli@siumed.edu
authors.forename: Michael R
authors.initials: MR
authors.lastname: Pranzatelli
authors.forename: Elizabeth D
authors.initials: ED
authors.lastname: Tate
authors.forename: Erik R
authors.initials: ER
authors.lastname: Hoefgen
authors.forename: Jennifer A
authors.initials: JA
authors.lastname: Swan
authors.forename: Jerry A
authors.initials: JA
authors.lastname: Colliver
mesh_terms: D000293:Adolescent; D000324:Adrenocorticotropic Hormone / Q000627:therapeutic use*; D000328:Adult; D053264:B-Cell Activating Factor / Q000096:biosynthesis* / Q000097:blood / Q000134:cerebrospinal fluid; D002648:Child; D002675:Child, Preschool; D015536:Down-Regulation; D004797:Enzyme-Linked Immunosorbent Assay; D005260:Female; D006801:Humans; D016756:Immunoglobulins, Intravenous / Q000627:therapeutic use; D007167:Immunotherapy; D007223:Infant; D008297:Male; D053578:Opsoclonus-Myoclonus Syndrome / Q000188:drug therapy* / Q000503:physiopathology*; D013256:Steroids / Q000627:therapeutic use
chemical_list: D053264:B-Cell Activating Factor; D016756:Immunoglobulins, Intravenous; D013256:Steroids; C505719:TNFSF13B protein, human; D000324:Adrenocorticotropic Hormone