The Effect of By-Pass Linseed Oil Supplementation on the Maternal Antioxidant System during the Embryo-Maternal Recognition Period in Ewes.
Authors: Contreras-Solís Ignacio, Pasciu Valeria, Porcu Cristian, Sotgiu Francesca D, Todorova Neda, Baralla Elena, Mara Laura, Gallus Marilia, Cabiddu Andrea, Dattena Maria, Abecia José Alfonso, Berlinguer Fiammetta
Journal: Animals : an open access journal from MDPI
Summary
# Editorial Summary: By-Pass Linseed Oil and Maternal Antioxidant Status in Early Pregnancy The embryo-maternal recognition period represents a critical window of vulnerability in early pregnancy, during which oxidative stress can compromise embryonic survival and developmental competence. Contreras-Solís and colleagues investigated whether dietary supplementation with by-pass linseed oil (providing 10.8 g α-linolenic acid daily) could enhance maternal antioxidant defences in this crucial phase, using sixteen synchronised ewes divided into control and supplemented groups, with tissue sampling conducted on Days 14 and 16 post-mating. By-pass linseed oil supplementation significantly elevated antioxidant markers specifically in reproductive tissues: luteal and uterine thiols and total antioxidant capacity (TEAC) were substantially higher in the supplemented group by Day 16 (p < 0.05), whilst superoxide dismutase (SOD) activity increased on Days 14 and 16 across both tissues (p < 0.001), and uterine malondialdehyde (a marker of lipid peroxidation) was notably reduced by Day 16 (p < 0.001). Systemic plasma biomarkers showed no treatment differences, suggesting that the linseed oil's protective effect operates locally within the reproductive tract rather than systemically. For equine practitioners managing breeding stock, these findings indicate that omega-3 supplementation during the peri-conception period warrants investigation as a strategy to optimise the uterine environment during early embryonic development, potentially supporting implantation success and reducing early pregnancy loss through enhanced local antioxidant defences.
Read the full abstract on PubMed
Practical Takeaways
- •Alpha-linolenic acid supplementation via by-pass linseed oil may enhance antioxidant defenses in reproductive tissues during early pregnancy in ewes, potentially supporting embryo survival and development
- •Tissue-specific benefits (luteal and uterine) suggest targeted effects on maternal structures critical for embryo-maternal recognition rather than systemic plasma changes
- •Dosage of 10.8 g α-linolenic acid/ewe/day within isonitrogenous and isoenergetic diets provides a practical supplementation strategy without major dietary reformulation
Key Findings
- •By-pass linseed oil supplementation increased thiol and TEAC in luteal tissues on Day 16 (p < 0.05)
- •TEAC was significantly higher in uterine tissues of supplemented ewes on Days 14 and 16 (p < 0.05)
- •SOD activity was elevated in luteal tissues on Day 14 and uterine tissues on Day 16 in the linseed oil group (p < 0.001)
- •Uterine MDA content was lower in the linseed oil group on Day 16, indicating reduced oxidative damage (p < 0.001)