Clearing-factor lipase in obese hyperglycaemic mice (ob-ob)

Area of Science:

• Biochemistry
• Physiology
• Genetics

Background:

• Obesity is associated with altered lipid metabolism.
• Clearing-factor lipase plays a role in triglyceride hydrolysis.

Purpose of the Study:

• To investigate clearing-factor lipase activity in lean and genetically obese mice.
• To examine the effects of age and starvation on enzyme activity.

Main Methods:

• Assay of clearing-factor lipase in heart and epididymal fat-pad powders.
• Comparison of enzyme activity between lean and obese mice (ob/ob).
• Analysis of enzyme activity changes with age (8-48 weeks) and 24-hour starvation.

Main Results:

• Obese mice showed higher enzyme activity in both tissues.
• Heart enzyme activity increased with age in obese mice but not lean mice.
• Starvation affected heart enzyme activity in obese mice, and fat-pad activity decreased in both, remaining higher in obese mice.

Conclusions:

• Genetically obese mice have distinct clearing-factor lipase activity patterns.
• Age and starvation differentially impact enzyme activity in obese versus lean mice.
• Understanding these differences may offer insights into obesity-related metabolic changes.