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Preeclampsia, a serious pregnancy complication marked by elevated blood pressure and protein in the urine, has emerged as a leading cause of maternal and fetal mortality in Brazil and ranks second globally. Recent research published in the journal PLOS ONE highlights that variations in blood metabolite patterns can reflect the severity of preeclampsia.
The study, involving 173 pregnant women, categorized participants into four groups: healthy, gestational hypertension, preeclampsia, and severe preeclampsia. Blood samples underwent metabolomic analysis to identify metabolites, which are small molecules produced during the metabolism of food, drugs, and chemicals.
Findings revealed significant metabolic alterations among the groups, with specific metabolite patterns correlating with clinical indicators. This research enhances the understanding of preeclampsia and the potential mechanisms leading to organ damage.
According to the researchers, the metabolites identified signal which metabolic pathways are either activated or deactivated during preeclampsia. Plans for further research include investigating the causes of these metabolic changes and exploring possible pharmacological interventions.
The analysis utilized hydrogen nuclear magnetic resonance spectroscopy (1H NMR), a non-invasive technique that provides detailed insights into the molecular structure and concentration of metabolites. Nineteen metabolites were identified, with eleven showing significant differences across the groups. Notably, patients with severe preeclampsia exhibited elevated levels of metabolites such as acetate, N,N-dimethylglycine, glutamine, alanine, valine, and creatine compared to those with gestational hypertension and healthy controls.
Moreover, comparisons between preeclampsia and severe preeclampsia groups indicated that higher levels of specific metabolites were linked to increased severity, elevated blood pressure, and adverse obstetric outcomes, particularly in renal and liver function.
The study also indicated significant disruptions in nitrogen metabolism, methionine, and urea cycles within women diagnosed with preeclampsia. These metabolic disturbances may suggest renal and hepatic dysfunction, as evidenced by increased levels of creatine and alanine, shedding light on the pathophysiological processes associated with severe preeclampsia.
Moving forward, the research team aims to pursue two avenues based on these findings. The first involves conducting in vitro experiments on cultured cells to identify altered metabolic pathways in preeclampsia patients and to evaluate potential drug treatments for these changes. The second line of inquiry will focus on identifying biomarkers that could predict preeclampsia risk.
Future studies will involve collecting blood samples from pregnant women prior to any diagnosis of preeclampsia, aiming to uncover early metabolic alterations. This proactive approach could enhance monitoring and care for pregnant women identified as high-risk, particularly in areas lacking specialized maternity care for managing hypertension.
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