title: [Correlation of adipocytokines and insulin resistance in normal pregnancy].
abstract: OBJECTIVE
  To explore the dynamic changes of adipocytokines and its correlation with insulin resistance during different stages of normal pregnancy.
  
  
  METHODS
  Sixty-seven healthy pregnant women (18 first, 19 second and 30 third trimester) as experimental groups and 46 healthy age-matched non-pregnant women as a control group were investigated in a case-control cross-sectional study. Serum soluble tumor necrosis factor receptor (sTNFR) was determined by enzyme linked immunoadsorbent assay (ELISA). Maternal serum leptin and adiponectin were detected by radial immunodiffusion. TNF-alphaR in placenta and fat tissue was examined by streptavidin/peroxidase.
  
  
  RESULTS
  The sTNFR-I level was higher in pregnant women than that in the control group (729 +/- 167) ng/L, being significantly higher in second (1003 +/- 241) ng/L and third trimesters (1278 +/- 306) ng/L (P < 0.001). sTNFR-II level of first, second and third trimester groups (1383 +/- 305) ng/L, (1772 +/- 293) ng/L, (1933 +/- 498) ng/L was higher than that in the control group (1002 +/- 221) ng/L (P < 0.001) and was increased with the progress of gestation. Leptin level in late trimester (89 +/- 57) microg/L was significantly higher than that in control group (61 +/- 37) microg/L (P < 0.05). Adiponectin level in second (9 +/- 5) mg/L and third trimesters (10 +/- 4) mg/L was significantly lower than that in control group (14 +/- 7) mg/L (P < 0.05). The sTNFR-I and sTNFR-II were expressed in placenta and fat tissue.
  
  
  CONCLUSIONS
  The dynamic changes of adipocytokines contribute to occurrence of insulin resistance.
authors.affiliation: Department of Obstetrics, Beijing Obstetrical and Gynecological Hospital, Capital University of Medical Science, Beijing 100026, China.
authors.forename: Song
authors.initials: S
authors.lastname: Yu
authors.forename: Chun-yi
authors.initials: CY
authors.lastname: Zang
authors.forename: Wei-yuan
authors.initials: WY
authors.lastname: Zhang
mesh_terms: D054392:Adipokines / Q000097:blood*; D000328:Adult; D015415:Biomarkers / Q000097:blood; D016022:Case-Control Studies; D003430:Cross-Sectional Studies; D004797:Enzyme-Linked Immunosorbent Assay; D005260:Female; D006801:Humans; D007333:Insulin Resistance; D010920:Placenta / Q000378:metabolism; D011247:Pregnancy / Q000097:blood*; D011264:Pregnancy Trimesters; D011863:Radioimmunoassay
chemical_list: D054392:Adipokines; D015415:Biomarkers