l-Citrulline ameliorates pathophysiology in a rat model of superimposed preeclampsia

Area of Science:

• Reproductive biology and toxicology
• Cardiovascular research
• Maternal-fetal medicine

Background:

• Preeclampsia is a major cause of maternal and perinatal mortality with no current effective pharmacological treatments.
• This condition is characterized by hypertension, proteinuria, and restricted fetal growth.
• The study utilizes Dahl salt-sensitive rats, a recognized model for superimposed preeclampsia.

Purpose of the Study:

• To investigate the therapeutic effects of L-citrulline supplementation in a rat model of preeclampsia.
• To assess the impact of L-citrulline on blood pressure, preeclampsia markers, and endothelial function.
• To evaluate L-citrulline's influence on placental health and fetal development.

Main Methods:

• Dahl salt-sensitive rats received L-citrulline in drinking water from mating through lactation.
• Maternal blood pressure was monitored throughout pregnancy.
• Preeclampsia markers, endothelial function (via wire myography), placental characteristics, and gene expression were assessed.

Main Results:

• L-citrulline significantly reduced maternal blood pressure, proteinuria, and soluble fms-like tyrosine kinase 1 levels.
• Improved endothelial function was observed, with enhanced nitric oxide production and vasorelaxation.
• Placental insufficiency and fetal growth were improved, linked to enhanced angiogenesis and reduced fibrosis/senescence.
• Down-regulation of TLR4 and NF-κB signaling pathways was noted.

Conclusions:

• L-citrulline supplementation effectively mitigated gestational hypertension and improved placentation in a preeclampsia rat model.
• This intervention enhanced fetal growth and placental health.
• L-citrulline presents a potential safe and effective therapeutic strategy for preeclampsia, benefiting both mother and fetus.