Related Experiment Videos
Evidence for gender-specific associations between leptin and olfaction
A Cecilia Karlsson1, Anna Karin Lindroos, Lauren Lissner
1Department of Body Composition and Metabolism, Vita Stråket 15, Sahlgrenska University Hospital, SE-413 45 Göteborg, Sweden. cecilia.karlsson@medic.gu.se
The Journal of Gender-Specific Medicine : JGSM : the Official Journal of the Partnership for Women'S Health at Columbia
|December 31, 2002
Summary
Serum leptin levels are linked to odor identification in humans, with a notable gender difference. High leptin correlates with better smell identification in men, while low leptin is associated with better smell identification in women, independent of BMI.
Area of Science:
- Neuroendocrinology
- Sensory Science
- Human Physiology
Background:
- Leptin, an adipocyte hormone, regulates appetite via hypothalamic leptin receptors.
- Leptin receptors are also in the piriform cortex, influencing olfactory processing.
- Both olfaction and leptin impact food-seeking behaviors in rodents.
Purpose of the Study:
- To investigate the association between serum leptin levels and olfactory function in humans.
- To determine if this association is gender-specific and influenced by body mass index (BMI).
Main Methods:
- Analysis of two distinct human samples: a population-based cohort and an obese cohort.
- Assessment of olfactory function using a standardized two-part test.
- Statistical analysis including multiple regression, controlling for smoking, BMI, menopause, and estrogen treatment.
Main Results:
- A significant gender interaction was found between leptin levels and odor identification in the population-based sample.
- In men, higher leptin levels positively correlated with odor identification.
- In women, higher leptin levels negatively correlated with odor identification, an association strengthened after adjusting for menopausal status and estrogen therapy.
Conclusions:
- Serum leptin levels are associated with odor identification in a gender-specific manner, independent of BMI.
- Findings suggest distinct roles for leptin in olfactory perception between men and women.
- This highlights potential alternative mechanisms by which leptin modulates sensory and feeding behaviors.