Abstract：
OBJECTIVE:To longitudinally characterize changes in insulin sensitivity in obese women during and after pregnancy. RESEARCH DESIGN AND METHODS:Six glucose-tolerant obese women underwent a 4-h euglycemic-hyperinsulinemic (500-600 pmol/l) clamping during the second (22.5 +/- 2 weeks [mean +/- SD]) and third trimester (36.8 +/- 0.9) of pregnancy and again 15.6 +/- 1.4 weeks after delivery. Rates of total body glucose turnover (with [6.6-2H2]glucose) and oxidation (with indirect calorimetry) were measured. RESULTS:There were no significant changes with respect to the action of insulin on rates of glucose disappearance (GRd), carbohydrate oxidation, or endogenous glucose production (EGP), comparing the second trimester of pregnancy with the nonpregnant (postpartum) state. The third trimester, however, was characterized 1) by reductions in insulin-stimulated GRd (-28%, P < 0.05, compared with the second trimester and -40%, P < 0.05, compared with postpartum); 2) by even larger reductions in insulin-stimulated carbohydrate oxidation (-46%, P < 0.05, compared with the second trimester and -54%, P < 0.02, compared with postpartum); and 3) by reduction of insulin suppression of EGP (-39% compared with -79% at the second trimester and -77% postpartum, P < 0.01). CONCLUSIONS:Glucose-tolerant obese women developed peripheral was well as hepatic insulin resistance during the third trimester of pregnancy. These alterations were reversed after delivery and appeared to be adaptive mechanisms to cope with the increased demand for glucose of the growing fetus.
journal_name
Diabetes Carejournal_title
Diabetes careauthors
Sivan E,Chen X,Homko CJ,Reece EA,Boden Gdoi
10.2337/diacare.20.9.1470subject
Has Abstractpub_date
1997-09-01 00:00:00pages
1470-5issue
9eissn
0149-5992issn
1935-5548journal_volume
20pub_type
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