Related Experiment Video
Updated: May 27, 2026
09:41
Measuring the Rate of Lipolysis in Ex Vivo Murine Adipose Tissue and Primary Preadipocytes Differentiated In Vitro
Published on: March 17, 2023
Quality of pig adipose tissue: relationship between solid fat content and lipid composition
A Davenel1, A Riaublanc, P Marchal
1Cemagref, 17 avenue de Cucillé, 35044 Rennes Cedex, France.
Meat Science
|November 9, 2011
Summary
Solid fat content in pig adipose tissue varies significantly. Its variability is primarily determined by specific triacylglycerol and saturated fatty acid proportions, not carcass lean content.
Area of Science:
- Animal Science
- Food Science
- Biochemistry
Background:
- Solid fat content (SFC20) in adipose tissue is a critical factor influencing texture and processing properties.
- Understanding the molecular basis of SFC20 variability is essential for predicting and controlling fat characteristics.
- Previous studies have explored fatty acid profiles, but the specific role of triacylglycerol composition requires further elucidation.
Purpose of the Study:
- To investigate the relationship between the solid fat content at 20°C (SFC20) of pig adipose tissues and their detailed fatty acid and triacylglycerol compositions.
- To identify key molecular determinants driving the wide variation observed in SFC20.
- To evaluate the predictive power of different lipid components and carcass characteristics on SFC20.
Main Methods:
- Lipids were extracted from adipose tissues of 166 pigs.
- Solid fat content at 20°C (SFC20) was measured.
- Fatty acid composition and triacylglycerol profiles were analyzed.
- Statistical correlations (R²) were calculated to assess relationships between SFC20 and lipid components.
Main Results:
- Average SFC20 was 20%, with a wide range (9-35%).
- SFC20 variability was strongly correlated with disaturated triacylglycerols, particularly palmitoyl-stearoyl-oleoyl-glycerol (R²=0.92).
- Proportions of saturated fatty acids (palmitic and stearic acids) also showed a high correlation (R²=0.94), while polyunsaturated fatty acids explained less variance (R²=0.48).
- Iodine value correlated well with SFC20 (R²=0.81), but carcass lean content was a poor predictor (R²=0.06).
Conclusions:
- The solid fat content of pig adipose tissue is predominantly governed by its triacylglycerol and saturated fatty acid composition.
- Specific molecular species like palmitoyl-stearoyl-oleoyl-glycerol are key drivers of SFC20.
- Carcass lean content is not a reliable indicator for predicting the solid fat content of adipose tissues.
Related Concept Videos
01:29Cholesterol: Significance and Regulation
Although not a source of energy, cholesterol plays a significant role as a foundational structure for bile salts, steroid hormones, and vitamin D, as well as being a crucial component of plasma membranes. Approximately 15% of blood cholesterol is derived from our diet, with the remainder synthesized from acetyl CoA by the liver and intestines. Cholesterol is eliminated from the body through its conversion into bile salts, which are eventually discarded in the feces.
Considering cholesterol and...
Considering cholesterol and...
01:06Fats as Energy Storage Molecules
Triglycerides are a form of long-term energy storage molecules. They are made of glycerol and three fatty acids. To obtain energy from fat, triglycerides must first be broken down by hydrolysis into their two principal components, fatty acids and glycerol. This process, called lipolysis, takes place in the cytoplasm. The resulting fatty acids are oxidized by β-oxidation into acetyl-CoA, which is used by the Krebs cycle. The glycerol that is released from triglycerides after lipolysis directly...