Ghrelin receptors are expressed in taste bud cells and influence fat taste sensitivity in female mice, suggesting a sex-specific role for ghrelin in how we perceive fatty foods.
Sex-specific fat taste effectFemale GHS-R knockout mice showed reduced fat taste sensitivity; males were unaffected
What the researchers found
Ghrelin receptors co-localize with Type II taste cells and their deletion reduces fat taste sensitivity specifically in female mice after high-fat diet exposure.
Why it matters
Understanding how appetite hormones influence taste perception could explain sex differences in food preferences and eating behaviors, potentially leading to targeted interventions for obesity.
The numbers in context
GHS-R co-localized with PLCβ2; 6 weeks 60% HFD; female Ghsr-/- reduced LA response; no male effect
How the study worked
Transgenic GHS-R-GFP mice for receptor localization via immunohistochemistry. Feeding studies and conditioned taste aversion assays comparing GHS-R knockout and wild-type mice on 60% high-fat diet for 6 weeks.
Who was studied
Wild-type and GHS-R knockout mice, both sexes, on 60% high-fat diet
What this study cannot tell us
Mouse study — taste perception mechanisms may differ in humans. Only fat taste tested; effects on other taste modalities not explored. Knockout model eliminates receptors entirely rather than mimicking physiological variation.
How to read the evidence
Well-designed transgenic mouse study with immunohistochemistry and behavioral assays. Pre-clinical evidence with interesting sex-specific findings.
When this study was published
Published in 2021, contributing to emerging understanding of peripheral hormone signaling in taste perception.
The bigger picture
Ghrelin is primarily known as a hunger hormone acting in the brain, but this study reveals it also operates in taste buds themselves. This peripheral role in taste perception adds a new dimension to understanding how the body's hunger signals influence food choices at the sensory level.
Questions still open
- Do ghrelin levels affect human fat taste perception?
- Could ghrelin receptor modulation alter food preferences to support weight management?
- Why is the fat taste effect sex-specific?
Common questions
Can hunger hormones change how food tastes?
Why did ghrelin only affect fat taste in female mice?
Read the original research
Ghrelin Receptors Enhance Fat Taste Responsiveness in Female Mice.
Nutrients, 13(4)
Citation
Calder, Ashley N; Yu, Tian; Dahir, Naima S; Sun, Yuxiang; Gilbertson, Timothy A. (2021). Ghrelin Receptors Enhance Fat Taste Responsiveness in Female Mice.. Nutrients, 13(4). https://doi.org/10.3390/nu13041045