Liver ultrastructure in pigs fed various oils

Area of Science:

• Animal Science
• Hepatology
• Nutritional Biochemistry

Background:

• The liver's metabolic function is sensitive to dietary components.
• Understanding the impact of different dietary oils on liver ultrastructure is crucial for animal health and nutrition.

Purpose of the Study:

• To investigate the ultrastructural effects of various dietary oils on porcine liver.
• To compare the cellular alterations induced by rapeseed oil (low and high erucic acid), herring oil, and soybean oil.

Main Methods:

• Feeding studies with 10- to 11-week-old pigs for 10 weeks.
• Supplementation with 10% rapeseed oil (Tower and Target varieties), Atlantic herring oil, or soybean oil.
• Comparative ultrastructural analysis of liver tissues using electron microscopy.

Main Results:

• Rapeseed oil (both varieties) induced increased endoplasmic reticulum cisternae, signet ring mitochondria, and cytoplasmic lacunae; bile canaliculi were occluded.
• Herring oil led to excess lipid droplets, electron-dense bodies in the Golgi zone, and dilated bile canaliculi.
• Soybean oil caused lipid droplet accumulation and altered mitochondrial cristae stacking.

Conclusions:

• Dietary oils induce specific ultrastructural modifications in porcine hepatocytes.
• Observed alterations suggest functional adaptations of liver metabolism in response to different oil supplements.
• The type of dietary oil influences the nature and extent of cellular changes in the liver.