Related Experiment Videos
Serum leptin concentrations in patients with thyroid disorders
T Yoshida1, N Momotani, M Hayashi
1Department of Internal Medicine, School of Medicine, Keio University, Tokyo, Japan.
Clinical Endocrinology
|May 14, 1998
Summary
Thyroid hormone influences leptin secretion in humans. Hypothyroid patients showed significantly lower serum leptin levels compared to hyperthyroid and normal individuals, suggesting a regulatory role.
Area of Science:
- Endocrinology
- Metabolism
- Obesity Research
Background:
- Leptin, a hormone secreted by adipocytes, regulates body weight homeostasis.
- Thyroid hormone has been identified as an in vitro stimulator of leptin mRNA expression and secretion.
- This study investigates the in vivo role of thyroid hormone in human leptin regulation.
Purpose of the Study:
- To explore the role of thyroid hormone in the regulation of leptin secretion in humans.
- To compare serum leptin concentrations in individuals with hyperthyroidism, hypothyroidism, and normal thyroid function.
Main Methods:
- Study included 59 non-obese women: 19 hyperthyroid, 17 hypothyroid, and 23 controls.
- Serum leptin concentrations were measured using radioimmunoassay.
- Correlations between leptin, BMI, and group comparisons were analyzed.
Main Results:
- Serum leptin concentrations correlated significantly with BMI across all groups (hyperthyroid, hypothyroid, normal).
- Hypothyroid patients exhibited significantly lower serum leptin levels (5.30 ± 1.12 µg/l) compared to hyperthyroid (6.87 ± 0.66 µg/l) and normal groups (6.58 ± 0.68 µg/l).
- Despite similar age, body weight, and BMI, leptin levels differed significantly between hypothyroid and other groups.
Conclusions:
- Thyroid hormone plays a significant role in regulating leptin secretion in humans.
- Altered thyroid hormone levels, particularly hypothyroidism, are associated with decreased leptin levels.
- These findings highlight the interplay between thyroid function and leptin in metabolic regulation.