Related Experiment Video
Updated: May 17, 2025
Modeling Encephalopathy of Prematurity Using Prenatal Hypoxia-ischemia with Intra-amniotic Lipopolysaccharide in Rats
Published on: November 20, 2015
Maternal-offspring brain and tissue cross-talk in preeclampsia: insights from a rat model
Xiaomin Xu1, Haiyin Chen1, Lidan Gao1
1Scientific Research Center, Wenzhou Third Clinical Institute Affiliated to Wenzhou Medical University, Wenzhou People'S Hospital, Wenzhou, China.
Insights
Preeclampsia (PE) alters metabolism across maternal and offspring tissues, impacting the brain-placenta axis. Understanding these metabolic shifts is key for potential neurological outcome implications.
Area of Science:
- Biochemistry
- Neuroscience
- Reproductive Medicine
Background:
- Preeclampsia (PE) is a complex pregnancy disorder with significant maternal and fetal implications.
- The pathophysiology of PE involves intricate interactions between maternal and fetal systems, including the brain and placenta.
- Metabolic dysregulation is increasingly recognized as a contributing factor to PE's development and consequences.
Purpose of the Study:
- To investigate differential metabolic profiles in maternal and offspring brains, serum, and placental tissues in preeclampsia (PE).
- To elucidate maternal-offspring brain and tissue cross-talk in the context of PE pathophysiology.
- To explore tissue-specific metabolic signatures and their interactions in early-onset PE (EOPE) and late-onset PE (LOPE) models.
Main Methods:
- Induction of PE in a rat model using N-nitro-L-arginine methyl ester (L-NAME) to simulate EOPE and LOPE.
- Non-targeted proton nuclear magnetic resonance (NMR) metabolomics for serum, placental, and brain tissue analysis.
- Multivariate analysis, correlation networks, and tissue heterogeneity analysis to identify metabolic signatures and interactions.
Main Results:
- Significant metabolic differences and shared traits were observed across tissues in both EOPE and LOPE models.
- Serum metabolite changes included decreased tryptophan, isobutyrate, and lactate, with increased betaine.
- Upregulated lactate in placental tissues and extensive inter-tissue metabolite exchanges between maternal/offspring brain, serum, and placenta were detected.
Conclusions:
- Preeclampsia induces multi-tissue metabolic remodeling, highlighting the critical role of the brain-placenta axis.
- Distinct metabolic characteristics and interaction patterns were observed between EOPE and LOPE.
- Addressing pathophysiological stress in PE is crucial, with potential implications for neurological outcomes and a need for classified diagnostic approaches.
Abstract:
This study aimed to investigate the differential metabolic profiles across maternal and offspring brains, serum, and placental tissues in preeclampsia (PE), with a particular focus on elucidating the maternal-offspring brain and tissue cross-talk that may contribute to the complex pathophysiology of PE. PE was induced in rats using the nitric oxide synthase inhibitor N-nitro-L-arginine methyl ester (L-NAME) to simulate both early-onset PE (EOPE) and late-onset PE (LOPE). We utilized non-targeted proton nuclear magnetic resonance (NMR) metabolomics to characterize the metabolic profiles of serum, placental tissue extracts, and brain tissues from both mothers and offspring. Multivariate analysis, Spearman correlation, Density-Based Spatial Clustering of Applications with Noise algorithm, Data-Driven Statistical Predictive Correlation network analysis and Tissue heterogeneity analysis were employed to explore tissue-specific metabolic signatures and their interactions. Following L-NAME induction, both EOPE and LOPE presented significant metabolic differences and shared traits across tissues, with distinct tissue-specific responses characterizing the metabolic profile of PE. Serum from both PE groups showed a decrease in tryptophan, isobutyrate, and lactate, with an increase in betaine. Lactate was upregulated in placental tissues, highlighting its metabolic role. Extensive intra-tissue metabolic correlations and inter-tissue metabolite exchanges were detected among the maternal brain, serum, placenta, and offspring brain across all three experimental groups. EOPE and LOPE exhibited distinctly different metabolic characteristics and trajectories of differential metabolites, along with diverse interaction patterns between the maternal/offspring brain and the placenta. This study uncovers the multi-tissue metabolic remodeling in response to preeclampsia, implying that addressing pathophysiological stress is crucial and may have potential implications for neurological outcomes. The comprehensive analysis highlights the pivotal role of the brain-placenta axis in preeclampsia, advocating for a classified diagnostic and management approach.
