Human Reproduction, Vol. 15, No. 9, 2033-2036,
September 2000
© 2000 European Society of Human Reproduction and Embryology
Longitudinal analysis of maternal plasma leptin concentrations during normal pregnancy and pre-eclampsia
Department of Maternal–Fetal Medicine, Division of Paediatrics, Obstetrics & Gynaecology, Imperial College School of Medicine, Chelsea & Westminster Hospital, London, UK
Leptin concentrations have been found to be elevated in cross-sectional studies of established pre-eclampsia. Circulating concentrations of leptin were measured in a cross-sectional study to confirm these findings (19 women with pre-eclampsia and 13 normal pregnant controls) and in a longitudinal study to establish the timing of the increase in leptin concentrations (samples obtained at 16, 20, 24, 28, 32, 36 and 38 weeks gestation from eight women who went on to develop pre-eclampsia and seven normal pregnant controls). In the cross-sectional study, plasma leptin concentrations were significantly greater in women with pre-eclampsia than in normal controls (P = 0.001). In the longitudinal study, it was found that circulating leptin concentrations rose gradually to 32 weeks and thereafter declined slightly in normals. The concentrations in women destined to develop pre-eclampsia were consistently higher from 20 weeks gestation (P = 0.04–0.003) and, in contrast to the normal controls, rose markedly from 32 weeks as pre-eclampsia developed. This study confirms that plasma leptin concentrations are increased in established pre-eclampsia and reports for the first time that leptin concentrations are elevated before pre-eclampsia is clinically evident.
Key words: leptin/pre-eclampsia/pregnancy
1 To whom correspondence should be addressed at: Department of Maternal–Fetal Medicine, Division of Paediatrics Obstetrics & Gynaecology, Imperial College School of Medicine, Chelsea & Westminster Hospital, 369 Fulham Road, London SW10 8NH, UK. E-mail: n.anim{at}ic.ac.uk
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