Dietary Interventions for Optimal Liver Function in High-Yielding Dairy Cows.

Area of Science:

• Veterinary Medicine
• Animal Nutrition
• Dairy Science

Background:

• Optimal liver function is essential for high-producing dairy cows, impacting milk yield, fertility, and overall health.
• Key hepatic processes include metabolism (gluconeogenesis, fatty acids, amino acids), synthesis (proteins, bile acids), detoxification, and immune functions.
• Fatty liver, a condition where fatty acid oxidation is overwhelmed, can impair hepatic function and negatively affect cow health.

Purpose of the Study:

• To highlight the critical role of liver function in dairy cow productivity and health.
• To discuss the impact of fatty liver on hepatic capacity.
• To explore how nutritional strategies can support liver function, particularly around calving.

Main Methods:

• Review of established liver function tests.
• Integration of insights from metabolomics, transcriptomics, and proteomics for understanding hepatic adaptations.
• Evaluation of nutritional interventions for managing liver health.

Main Results:

• Fatty liver occurs when fatty acid uptake exceeds the liver's metabolic capacity.
• Advanced 'omics' technologies reveal complex roles of metabolites like acylcarnitines and lipids in liver adaptation.
• Specific nutritional strategies can effectively support liver function.

Conclusions:

• Maintaining proper liver function is vital for dairy cow health and high productivity.
• Nutritional management, including controlled energy diets and targeted supplements (methionine, choline), is key to preventing periparturient metabolic issues.
• Targeted nutritional manipulations can enhance dairy cow health and productivity by supporting liver function.