title: Maternal serum insulin-like growth factor-I at 11-13 weeks in preeclampsia.
abstract: OBJECTIVE
  To investigate the maternal serum concentration of insulin-like growth factor-I (IGF-I) in the first trimester of pregnancies that subsequently develop preeclampsia (PE) and to examine the possible association with uterine artery pulsatility index (PI).
  
  
  METHODS
  The maternal serum concentration of IGF-I and uterine artery PI at 11-13 weeks were measured in 53 cases that developed PE, including 18 that required delivery before 34 weeks (early-PE) and 106 unaffected controls. The measured IGF-I concentration and uterine artery PI were converted into a multiple of the expected median (MoM) in unaffected pregnancies, and median MoM values were compared in the outcome groups. The significance of association of IGF-I MoM with uterine artery PI MoM was determined by regression analysis.
  
  
  RESULTS
  In the early-PE and late-PE groups, compared to the unaffected controls, the median IGF-I decreased (0.53 and 0.55 MoM, respectively) and uterine artery PI increased (1.55 and 1.21 MoM, respectively). In the group that developed PE, there was no significant association between serum IGF-I and uterine artery PI (p = 0.632).
  
  
  CONCLUSIONS
  In pregnancies destined to develop PE, the circulating levels of IGF-I decrease from the first trimester of pregnancy suggesting that IGF-I may be implicated in the pathogenesis of the disease.
authors.affiliation: Department of Obstetrics and Gynaecology, University Hospital of Heraklion, Crete, Greece.
authors.forename: Stavros
authors.initials: S
authors.lastname: Sifakis
authors.forename: Ranjit
authors.initials: R
authors.lastname: Akolekar
authors.forename: Dimitra
authors.initials: D
authors.lastname: Kappou
authors.forename: Nikitas
authors.initials: N
authors.lastname: Mantas
authors.forename: Kypros H
authors.initials: KH
authors.lastname: Nicolaides
mesh_terms: D000328:Adult; D016022:Case-Control Studies; D005260:Female; D006801:Humans; D007334:Insulin-Like Growth Factor I / Q000378:metabolism*; D011225:Pre-Eclampsia / Q000097:blood* / Q000000981:diagnostic imaging / Q000503:physiopathology; D011247:Pregnancy; D011261:Pregnancy Trimester, First / Q000097:blood; D011446:Prospective Studies; D011673:Pulsatile Flow / Q000502:physiology; D018709:Statistics, Nonparametric; D014463:Ultrasonography; D055988:Uterine Artery / Q000000981:diagnostic imaging / Q000503:physiopathology; D055815:Young Adult
chemical_list: D007334:Insulin-Like Growth Factor I