Maternal serum adiponectin multimers in preeclampsia

Area of Science:

• Reproductive biology
• Metabolic disorders
• Endocrinology

Background:

• Preeclampsia is associated with obesity, insulin resistance, and dyslipidemia.
• Adipose tissue dysfunction, marked by altered adipokine production, is implicated in metabolic diseases.
• Adiponectin, an adipokine with insulin-sensitizing and anti-inflammatory properties, exists in various molecular weight complexes (LMW, MMW, HMW), with the HMW isoform considered most active.

Purpose of the Study:

• To investigate the association between preeclampsia and alterations in circulating adiponectin multimers.
• To determine if the ratio of high-molecular-weight (HMW) to total adiponectin, a marker of adiponectin activity, differs in preeclampsia.

Main Methods:

• A cross-sectional study comparing 225 women with normal pregnancies to 111 women with mild preeclampsia.
• Serum concentrations of total, HMW, MMW, and LMW adiponectin were measured using ELISA.
• The study population was stratified by pre-pregnancy BMI (normal weight vs. overweight/obese).

Main Results:

• Women with preeclampsia had significantly lower median concentrations of HMW and LMW adiponectin compared to those with normal pregnancies.
• The HMW/total adiponectin ratio was lower in preeclampsia, while MMW/total and LMW/total ratios were higher.
• Lower HMW adiponectin and a low HMW/total ratio were independently associated with preeclampsia, even after adjusting for confounding factors.

Conclusions:

• Preeclampsia is characterized by reduced levels of the biologically active HMW adiponectin isoform and a diminished HMW/total adiponectin ratio.
• Unlike in normal pregnancy, overweight/obese individuals with preeclampsia did not show decreased circulating adiponectin multimers, suggesting dysregulation specific to preeclampsia.
• Alterations in adiponectin multimer distribution in preeclampsia indicate a potential role for these complexes in the disease's pathophysiology.