title: [Age-related changes serum levels of MMP-1 and MMP-2 in women: their relationship with bone biochemical markers and bone mineral density].
abstract: OBJECTIVE
  To study the relationship between serum matrix metalloproteinase (MMP)-1, MMP-2 and bone turnover markers, bone mineral density (BMD) in Chinese women aged 20-80 years.
  
  
  METHODS
  Serum MMP-1, MMP-2, bone alkaline phosphatase (BAP), osteocalcin (OC) and cross-linked N-telopeptide of collagen type I (NTX) were measured using ELISA. BMD were measured using DEXA in 591 women.
  
  
  RESULTS
  (1) MMP-1 and MMP-2 were positively correlated with age (both P < 0.001). (2) Level of MMP-2 in postmenopausal women was significantly higher than that in premenopausal women (P < 0.001). (3) Significant negative relationship was found between MMP-2 and BMD, but multiple linear stepwise regression analysis showed MMP-2 was not the determinant factor of BMD. (4) Positive correlation was found between MMP-2 and BAP, OC, NTX (all P < 0.001). (5) Serum MMP-2 concentrations were significantly higher in postmenopausal osteoporotic women than in age-matched normal controls and osteopenic subjects.
  
  
  CONCLUSIONS
  Circulating MMP-2 and markers of bone turnover are related and they may increase with the increase in bone-turnover. The increase of serum MMP-2 appears possibly as a concomitant event in high bone turnover state such as postmenopausal osteoporosis.
authors.affiliation: Institute of Metabolism and Endocrinology, The Second Xiang-Ya Hospital, Central South University, Changsha 410011, China.
authors.forename: Hong
authors.initials: H
authors.lastname: Zhang
authors.forename: Xiang-hang
authors.initials: XH
authors.lastname: Luo
authors.forename: Hui
authors.initials: H
authors.lastname: Xie
authors.forename: Xian-ping
authors.initials: XP
authors.lastname: Wu
authors.forename: Peng-fei
authors.initials: PF
authors.lastname: Shan
authors.forename: Xing-zhi
authors.initials: XZ
authors.lastname: Cao
authors.forename: Er-yuan
authors.initials: EY
authors.lastname: Liao
mesh_terms: D000328:Adult; D000367:Age Factors; D000368:Aged; D000369:Aged, 80 and over; D015415:Biomarkers / Q000097:blood; D015519:Bone Density / Q000502:physiology*; D003430:Cross-Sectional Studies; D004797:Enzyme-Linked Immunosorbent Assay; D005260:Female; D006801:Humans; D020781:Matrix Metalloproteinase 1 / Q000097:blood*; D020778:Matrix Metalloproteinase 2 / Q000097:blood*; D008875:Middle Aged; D015675:Osteocalcin / Q000097:blood; D015663:Osteoporosis, Postmenopausal / Q000503:physiopathology
chemical_list: D015415:Biomarkers; D015675:Osteocalcin; D020778:Matrix Metalloproteinase 2; D020781:Matrix Metalloproteinase 1