Postprandial triglyceride metabolism in elderly men with subnormal testosterone levels

Area of Science:

• Endocrinology
• Metabolic Health
• Cardiovascular Risk Factors

Background:

• Subnormal testosterone levels in elderly men are associated with metabolic disturbances.
• Postprandial hypertriglyceridemia is a risk factor for atherosclerosis.
• Testosterone's role in lipid metabolism requires further investigation.

Purpose of the Study:

• To compare postprandial triglyceride levels in elderly men with subnormal versus normal testosterone.
• To explore the relationship between testosterone, obesity, and triglyceride metabolism.

Main Methods:

• Cross-sectional study comparing 37 men with subnormal testosterone (< 11.0 nmol/L) and 41 with normal testosterone (> 11.0 nmol/L).
• Participants aged 60-80 years underwent an oral fat tolerance test.
• Serum triglyceride levels were measured fasting and at 2, 4, 6, and 8 hours post-meal.

Main Results:

• Men with subnormal testosterone had higher BMI and waist circumference.
• Significantly elevated postprandial serum and chylomicron triglyceride responses (AUC, AUCi, TGR) were observed in men with low testosterone.
• Adjusting for waist circumference eliminated the significant differences in postprandial triglyceridemia.

Conclusions:

• Subnormal testosterone is linked to impaired metabolism of postprandial triglyceride-rich lipoproteins in elderly men.
• This metabolic dysfunction may contribute to an unfavorable lipid profile.
• The findings suggest a potential role for testosterone in managing cardiovascular risk.