title: Circulating matrix metalloproteinase-9 concentrations and abdominal aortic aneurysm presence: a meta-analysis.
abstract: To summarize the present evidence for an association between matrix metalloproteinase-9 (MMP-9) and abdominal aortic aneurysm (AAA) presence, we performed a meta-analysis of case-control studies that compared circulating MMP-9 concentrations between patients with AAA and subjects without AAA. MEDLINE database was searched to identify all case-control studies. For each study, data regarding serum or plasma MMP-9 concentrations in both the AAA and control groups were used to generate standardized mean differences (SMDs) and 95% confidence intervals (CIs). Study-specific estimates were combined using inverse variance-weighted average of logarithmic SMDs in both fixed- and random-effects models. Our search identified eight eligible studies including 580 patients with AAA and 258 subjects without AAA. Pooled analysis demonstrated significantly higher circulating MMP-9 concentrations in the AAA group than those in the control group in random-effect models (SMD, 0.70; 95% CI, 0.23-1.17; P=0.004). There was significant study heterogeneity of results (P<0.00001) but no evidence of significant publication bias (P=0.1376). We found that, based on a systematic review and meta-analysis, circulating MMP-9 concentrations are higher in patients with AAA than those in subjects without AAA. Higher circulating MMP-9 concentrations are associated with AAA presence.
authors.affiliation: Department of Cardiovascular Surgery, Shizuoka Medical Center, Sunto-gun, Shizuoka 411-8611, Japan.
authors.forename: Hisato
authors.initials: H
authors.lastname: Takagi
authors.forename: Hideaki
authors.initials: H
authors.lastname: Manabe
authors.forename: Norikazu
authors.initials: N
authors.lastname: Kawai
authors.forename: Shin-Nosuke
authors.initials: SN
authors.lastname: Goto
authors.forename: Takuya
authors.initials: T
authors.lastname: Umemoto
mesh_terms: D017544:Aortic Aneurysm, Abdominal / Q000201:enzymology* / Q000401:mortality; D001019:Aortic Rupture / Q000201:enzymology* / Q000401:mortality; D015415:Biomarkers / Q000097:blood; D019317:Evidence-Based Medicine; D006801:Humans; D020780:Matrix Metalloproteinase 9 / Q000097:blood*; D017594:Publication Bias; D015854:Up-Regulation
chemical_list: D015415:Biomarkers; D020780:Matrix Metalloproteinase 9