title: [Matrix metalloproteinase-1 expression in the circulation of patients with Kawasaki disease and its role in the pathogenesis of coronary artery lesions].
abstract: OBJECTIVE
  Kawasaki disease (KD) is an acute and self-limited systemic vasculitis syndrome of unknown origin that mainly affects small and medium-sized arteries, particularly the coronary arteries, which is followed by aneurysm formation. Increased levels of matrix metalloproteinase-1 (MMP-1) have been detected in aortic aneurysms in adults, suggesting an important role of MMP-1 in arterial wall destruction and resultant aneurysm formation. The aim of this study was to investigate the potential role of MMP-1 in the pathogenesis of coronary artery lesions in patients with KD.
  
  
  METHODS
  Forty patients with KD, including 23 patients without coronary artery lesions (CAL) and 17 patients with CAL, as well as age-matched 10 febrile and 10 healthy afebrile controls were studied. The duration of KD was divided into three phases: the acute phase, the subacute phase and the convalescent phase. Enzyme-linked immunosorbent assay was used to detect the protein levels of MMP-1 in the sera. MMP-1 mRNA expression in the circulating leucocytes was studied using reverse transcription-polymerase chain reaction.
  
  
  RESULTS
  Levels of MMP-1 protein in serum and MMP-1 mRNA expression in the leucocytes were significantly elevated at the acute phase in the two groups of KD patients (CAL group: 14.91 +/- 3.88 ng/ml and 0.89 +/- 0.15 ng/ml; NO-CAL group: 11.27 +/- 3.28 ng/ml and 0.77 +/- 0.14, respectively), compared with febrile (7.05 +/- 1.98 ng/ml and 0.45 +/- 0.12 ng/ml, respectively) and afebrile (5.13 +/- 1.20 ng/ml and 0.29 +/- 0.12 ng/ml, respectively) controls (P < 0.01). Furthermore, MMP-1 protein and MMP-1 mRNA levels were significantly higher in KD patients with CAL than in KD patients without CAL (P < 0.05). There was a significantly positive correlation between the serum protein level of MMP-1 at the acute phase of KD and the circulating leucocytes counts (r = 0.750, P < 0.01). The MMP-1 serum protein level and mRNA expression in the leucocytes at the acute phase of the two KD groups decreased obviously from the subacute through the convalescent phases (P < 0.05 or P < 0.01).
  
  
  CONCLUSIONS
  The expression of MMP-1 at the acute phase of KD was significantly elevated, especially in KD patients with CAL. MMP-1 might be involved in the formation of coronary artery lesions and pathogenesis of KD.
authors.affiliation: Department Cardiovascular Medicine, Nanjing Children's Hospital, Nanjing Medical University, Nanjing 210008, China.
authors.forename: Shi-wei
authors.initials: SW
authors.lastname: Yang
authors.forename: Da-wei
authors.initials: DW
authors.lastname: Wang
authors.forename: Jun
authors.initials: J
authors.lastname: Li
authors.forename: Yu-ming
authors.initials: YM
authors.lastname: Qin
authors.forename: Feng-ming
authors.initials: FM
authors.lastname: Wang
authors.forename: Li-ming
authors.initials: LM
authors.lastname: Cao
authors.forename: Lan-fang
authors.initials: LF
authors.lastname: Zhang
authors.forename: Zheng
authors.initials: Z
authors.lastname: Hu
mesh_terms: D000208:Acute Disease; D002675:Child, Preschool; D003323:Coronary Aneurysm / Q000201:enzymology* / Q000209:etiology / Q000473:pathology; D003331:Coronary Vessels / Q000473:pathology*; D004797:Enzyme-Linked Immunosorbent Assay; D005334:Fever / Q000209:etiology; D006801:Humans; D007223:Infant; D007962:Leukocytes / Q000201:enzymology*; D008297:Male; D020781:Matrix Metalloproteinase 1 / Q000097:blood* / Q000235:genetics; D009080:Mucocutaneous Lymph Node Syndrome / Q000150:complications* / Q000175:diagnosis; D012333:RNA, Messenger / Q000097:blood; D020133:Reverse Transcriptase Polymerase Chain Reaction; D012720:Severity of Illness Index
chemical_list: D012333:RNA, Messenger; D020781:Matrix Metalloproteinase 1