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Adiponectin and insulin resistance in early- and late-onset pre-eclampsia
R D'Anna1, G Baviera, F Corrado
1Department of Obstetrics and Gynecology, University of Messina, Messina, Italy. rosariodanna@tin.it
Insights
Early and late-onset pre-eclampsia may have different causes, as indicated by distinct first-trimester adiponectin and insulin resistance (HOMA-IR) levels. These markers may help differentiate between these two forms of pre-eclampsia.
Area of Science:
- Reproductive Endocrinology
- Metabolic Disorders
- Maternal-Fetal Medicine
Background:
- Pre-eclampsia is a serious pregnancy complication.
- Adiponectin and insulin resistance are implicated in various metabolic conditions.
- Understanding early- and late-onset pre-eclampsia may reveal different underlying mechanisms.
Purpose of the Study:
- To investigate the roles of adiponectin and insulin resistance in early- and late-onset pre-eclampsia.
- To determine if these markers can differentiate between the onset types of pre-eclampsia.
Main Methods:
- A nested case-control study involving 72 pregnant women.
- Measurement of plasma adiponectin and homeostasis model assessment of insulin resistance (HOMA-IR) in the first trimester and at delivery.
- Comparison of pre-eclampsia groups (early- and late-onset) with uncomplicated pregnancies.
Main Results:
- First-trimester adiponectin levels were lower and HOMA-IR was higher in the overall pre-eclampsia group compared to controls.
- Late-onset pre-eclampsia showed significantly lower first-trimester adiponectin and higher HOMA-IR compared to early-onset pre-eclampsia and controls.
- Adiponectin levels at delivery were higher in the pre-eclampsia group than controls.
Conclusions:
- First-trimester adiponectin and HOMA-IR levels appear to distinguish between early- and late-onset pre-eclampsia.
- These findings suggest potentially different pathophysiological pathways for early- and late-onset pre-eclampsia.
Objective:
To evaluate the importance of adiponectin and insulin resistance in early- and late-onset pre-eclampsia.
Design:
A nested case-control study in 72 pregnant women who participated in the first-trimester Down-syndrome-screening programme and who delivered at our hospital.
Setting:
University Hospital, Department of Obstetrics and Gynecology.
Population:
Pregnant women: 36 women with pre-eclampsia of which 20 late onset and 16 early onset were compared with 36 uncomplicated pregnancies who delivered at term.
Methods:
In all the women, insulin resistance was calculated by the homeostasis model assessment ratio (HOMA-IR) and plasma adiponectin was determined using an enzyme-linked immunosorbent assay.
Main Outcome Measures:
Insulin resistance and adiponectin concentration.
Results:
First-trimester plasma adiponectin mean levels in the whole pre-eclampsia group were significantly lower than that in the control group (8.4 +/- 3.3 versus 14.8 +/- 4.6 microgram/ml; P < 0.001), whereas first-trimester mean HOMA-IR values were significantly higher in the pre-eclampsia group than that in the control group (2.0 +/- 1.1 versus 1.0 +/- 0.4; P= 0.01). Plasma adiponectin concentrations at delivery in the pre-eclampsia group were significantly higher than that in the control group (9.2 +/- 3.7 versus 7.8 +/- 2.6 microgram/ml; P= 0.04). First-trimester plasma adiponectin mean concentrations in the late-onset subgroup were significantly lower compared with the concentrations in early-onset subgroup (6.2 +/- 1.4 microgram/ml versus 11.1 +/- 3.2 microgram/ml; P < 0.001), and there was a significant difference in adiponectin plasma values only between women in the late-onset pre-eclampsia group versus those in the control group (P < 0.001). First-trimester mean HOMA-IR values were significantly higher in the late-onset subgroup compared with that of the early-onset subgroup (2.5 +/- 1.3 versus 1.3 +/- 0.3; P= 0.02), and there was a significant difference only between the control group versus the late-onset subgroup (P= 0.001).
Conclusions:
First-trimester adiponectin and HOMA-IR values seem to select two completely different populations: early- and late-onset pre-eclampsia, which might suggest a different pathogenesis.
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