title: Serum levels of matrix metalloproteinase-9 and tissue inhibitors of metalloproteinases 1 in subacute sclerosing panencephalitis.
abstract: We determined the relationship between the serum concentrations of matrix metalloproteinase-9 (MMP-9) and tissue inhibitors of metalloproteinases 1 (TIMP-1) in 33 patients with subacute sclerosing panencephalitis (SSPE) to investigate the function of the blood-brain-barrier (BBB) in SSPE. Serum MMP-9 and TIMP-1 levels were measured by ELISA. Serum MMP-9 levels and MMP-9/TIMP-1 ratios of SSPE patients in Papua New Guinea (n = 24), and those in Japan (n = 9) were significantly higher than the each control (MMP-9, p = 0.0390, and p = 0.0023, respectively; MMP-9/TIMP-1, p = 0.0319, and p = 0.0009, respectively). Serum MMP-9 levels and MMP-9/TIMP-1 ratios of SSPE patients with Jabbour stage III (n = 13) were significantly higher than those with Jabbour stage II (n = 18) (p = 0.003, and p = 0.0412, respectively). There were no significant differences of serum TIMP-1 levels between the SSPE patients and controls. High serum MMP-9 and MMP-9/TIMP-1 levels will promote brain invasion through the BBB by immunocompetent cells in the blood. Our findings suggest that the balance of serum MMP-9 and TIMP-1 levels modulate the inflammatory cascade of SSPE.
authors.affiliation: Department of Pediatrics, Yamaguchi University School of Medicine, 1-1-1 Minamikogushi, Ube, Yamaguchi 755-8505, Japan. ichiyama@yamaguchi-u.ac.jp
authors.forename: Takashi
authors.initials: T
authors.lastname: Ichiyama
authors.forename: Peter
authors.initials: P
authors.lastname: Siba
authors.forename: Dagwin
authors.initials: D
authors.lastname: Suarkia
authors.forename: Toshiaki
authors.initials: T
authors.lastname: Takasu
authors.forename: Kenji
authors.initials: K
authors.lastname: Miki
authors.forename: Ryutaro
authors.initials: R
authors.lastname: Kira
authors.forename: Koichi
authors.initials: K
authors.lastname: Kusuhara
authors.forename: Toshiro
authors.initials: T
authors.lastname: Hara
authors.forename: Jun
authors.initials: J
authors.lastname: Toyama
authors.forename: Susumu
authors.initials: S
authors.lastname: Furukawa
mesh_terms: D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D003431:Cross-Cultural Comparison; D004797:Enzyme-Linked Immunosorbent Assay; D005260:Female; D006801:Humans; D007564:Japan / Q000453:epidemiology; D008297:Male; D020780:Matrix Metalloproteinase 9 / Q000097:blood*; D009512:New Guinea / Q000453:epidemiology; D013344:Subacute Sclerosing Panencephalitis / Q000097:blood* / Q000453:epidemiology; D019715:Tissue Inhibitor of Metalloproteinase-1 / Q000097:blood*
chemical_list: D019715:Tissue Inhibitor of Metalloproteinase-1; D020780:Matrix Metalloproteinase 9