Follicular Fluid Metabolite Changes in Dairy Cows with Inactive Ovary Identified Using Untargeted Metabolomics

Area of Science:

• Veterinary Science
• Reproductive Biology
• Metabolomics

Background:

• Dairy cow metabolism differs between inactive ovaries and healthy states, but underlying molecular mechanisms are unclear.
• Inactive ovaries in postpartum dairy cows present a significant challenge to reproductive health and productivity.
• Understanding metabolic shifts is crucial for improving reproductive outcomes in dairy herds.

Purpose of the Study:

• To investigate changes in follicular fluid metabolites in dairy cows with inactive ovaries.
• To identify specific metabolites and metabolic pathways affected by inactive ovaries.
• To elucidate the molecular basis of impaired follicular development in postpartum dairy cows.

Main Methods:

• Untargeted metabolomics technology was employed to analyze follicular fluid.
• Multivariate statistical analysis was used to identify differential metabolites.
• Metabolic pathway analysis was performed on identified differential metabolites.

Main Results:

• Fourteen differential metabolites (amino acids, lipids, sugars, nucleotides) were identified between inactive ovaries and estrus cows.
• Eight metabolites were significantly increased, and six were decreased in dairy cows with inactive ovaries.
• Key affected pathways include glycerol phospholipid metabolism, arachidonic acid metabolism, and amino acid biosynthesis.

Conclusions:

• Metabolite profiles indicate enhanced lipid metabolism and weakened carbohydrate production from amino acids in cows with inactive ovaries.
• These metabolic alterations are linked to impaired follicular development during the postpartum period.
• The findings provide a foundation for further research into reproductive dysfunction in dairy cows.