Ghrelin directly activated midbrain dopamine neurons and reorganized their synaptic inputs, establishing the molecular mechanism linking the hunger hormone to the brain's reward/pleasure system and food-seeking behavior.
Key findingGhrelin directly excited ventral tegmental area (VTA) dopamine neurons and increased excitatory synaptic inputs while promoting food-seeking behavior
What the researchers found
Ghrelin directly excited ventral tegmental area (VTA) dopamine neurons and increased excitatory synaptic inputs while promoting food-seeking behavior — establishing the molecular neurocircuit linking the hunger hormone to the brain's reward/motivation system.
Why it matters
Relevant for ghrp, addiction, weight-loss.
How the study worked
animal-study study on ghrp, addiction.
What this study cannot tell us
See abstract.
How to read the evidence
strong evidence.
When this study was published
Published in 2006.
The bigger picture
Advances peptide research.
Questions still open
- Further research needed.
- Clinical translation to evaluate.
Common questions
What was studied?
What was found?
Read the original research
Ghrelin modulates the activity and synaptic input organization of midbrain dopamine neurons while promoting appetite.
The Journal of clinical investigation, 116(12), 3229-39
Citation
Abizaid, Alfonso; Liu, Zhong-Wu; Andrews, Zane B; Shanabrough, Marya; Borok, Erzsebet; Elsworth, John D; Roth, Robert H; Sleeman, Mark W; Picciotto, Marina R; Tschöp, Matthias H; Gao, Xiao-Bing; Horvath, Tamas L. (2006). Ghrelin modulates the activity and synaptic input organization of midbrain dopamine neurons while promoting appetite.. The Journal of clinical investigation, 116(12), 3229-39.