Maternal Extra Virgin Olive Oil Supplementation Enhances Offspring Immune Function: A Preclinical Study

Area of Science:

• Nutrition Science
• Immunology
• Developmental Biology

Background:

• Maternal diet significantly impacts offspring's long-term health, including immune function and gut integrity.
• Extra virgin olive oil (EVOO), a cornerstone of the Mediterranean Diet, is rich in beneficial compounds.
• Understanding the specific effects of maternal EVOO intake on offspring development is crucial.

Purpose of the Study:

• To investigate the impact of maternal extra virgin olive oil (EVOO) supplementation on the immune system and intestinal health of offspring.
• To evaluate changes in plasma immunoglobulin G2c (IgG2c) and small intestine histology in pups from mothers supplemented with EVOO.
• To assess the in vitro effects of EVOO metabolites on intestinal barrier function.

Main Methods:

• Lewis rat dams were assigned to diets with refined olive oil (ROO), EVOO, or a control (water) during gestation and lactation.
• Offspring plasma IgG2c levels were quantified.
• Small intestine tissues were analyzed histologically for goblet cell counts.
• In vitro assays examined the cytotoxicity and barrier integrity effects of EVOO metabolites.

Main Results:

• Offspring born to mothers supplemented with EVOO exhibited significantly elevated plasma IgG2c concentrations.
• Histological examination of the small intestine revealed an increased number of goblet cells in the EVOO group.
• In vitro studies indicated that EVOO metabolites were non-cytotoxic and enhanced intestinal barrier function under stress.

Conclusions:

• Maternal supplementation with extra virgin olive oil positively influences offspring immune system development.
• EVOO intake during gestation and lactation may improve intestinal barrier function in offspring.
• These findings highlight the potential of EVOO as a beneficial dietary component for maternal and infant health.