Related Experiment Videos
Ghrelin secretion is modulated in a nutrient- and gender-specific manner
Yona Greenman1, Nehama Golani, Susan Gilad
1Institute of Endocrinology, Metabolism and Hypertension, Tel Aviv-Sourasky Medical Center, Sackler School of Medicine Tel Aviv University, Tel Aviv, Israel. greenman@tasmc.health.gov.il
Clinical Endocrinology
|March 11, 2004
Summary
Ghrelin levels decrease after glucose or lipid meals, but not protein. These responses are influenced by gender, obesity, and insulin resistance, impacting appetite regulation.
Area of Science:
- Endocrinology
- Metabolism
- Nutritional Science
Background:
- Ghrelin is a key hormone regulating appetite and weight.
- Ghrelin levels typically decrease after nutrient intake, such as glucose.
Purpose of the Study:
- To investigate how oral glucose, lipid, and protein loads affect ghrelin levels.
- To determine if anthropometric and metabolic factors modulate these ghrelin responses.
Main Methods:
- 24 non-diabetic adults (13 men/11 women) received oral glucose, lipid, or protein loads.
- Fasting and post-load ghrelin levels were measured and correlated with metabolic factors.
Main Results:
- Fasting ghrelin negatively correlated with BMI, waist circumference, and insulin resistance (HOMA-R).
- Glucose and lipid loads significantly decreased ghrelin levels, modulated by sex, obesity, and insulin resistance.
- Protein load did not significantly alter ghrelin levels.
Conclusions:
- Ghrelin responses to nutrient loads vary significantly between glucose, lipids, and proteins.
- Gender, obesity, and insulin sensitivity are critical modulators of ghrelin's response to nutrients.