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NIH Research Festival

September 13 – 15, 2017

Exogenous ghrelin administration affects alcohol self-administration and brain activity in heavy-drinking alcohol-dependent individuals: A human laboratory study

Thursday, September 14, 2017 – Poster Session III
12:00 – 1:30 p.m.

FAES Terrace

NIAAA

NEURO-11

Authors

  • M Farokhnia
  • EN Grodin
  • MR Lee
  • EN Oot
  • AN Blackburn
  • BL Stangl
  • ML Schwandt
  • LA Farinelli
  • R Momenan
  • VA Ramchandani
  • L Leggio

Abstract

Ghrelin, a hormone synthesized by the stomach, increases appetite by acting on the arcuate nucleus of hypothalamus. In addition, ghrelin modulates central reward and stress pathways that contribute to drug-seeking behaviors. Ghrelin administration in rodents enhances alcohol motivation and intake. Studies in humans suggest a positive relationship between endogenous ghrelin levels and alcohol craving and relapse. The present double-blind, placebo-controlled, crossover study investigated the effects of intravenous (IV) ghrelin on alcohol self-administration (ASA) and brain activity in heavy-drinking alcohol-dependent individuals. Participants underwent two experiments: 1) IV-ASA via the computerized alcohol infusion system (CAIS), 2) Brain functional magnetic resonance imaging (fMRI). Each experiment included two sessions during which a loading dose (3 mcg/kg) of IV ghrelin or placebo followed by a continuous ghrelin or placebo infusion (16.9 ng/kg/min) were administered. Results showed that participants self-administered higher number of alcohol infusions during the ghrelin than placebo session (mean increase: 24.97%, p=0.04). They also started pressing the button sooner (p=0.01) and received the first infusion earlier (p=0.03) during the ghrelin session. In regards to fMRI blood oxygen level dependent (BOLD) signal, IV ghrelin increased the alcohol- and food-related BOLD signal, respectively in left amygdala (p=0.01) and left nucleus accumbens (p=0.08). In addition, IV ghrelin decreased food-related BOLD signal in right medial orbitofrontal cortex (p=0.01). In conclusion, ghrelin administration increased alcohol self-administration and modulated brain activity in this sample. These data suggest that ghrelin signaling influences the neural correlates of alcohol consumption and can be considered as a therapeutic target for alcohol use disorder.

Scientific Focus Area: Neuroscience

This page was last updated on Friday, March 26, 2021

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2017 program

Download the 2017 Research Festival Schedule Overview (6 pages)

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Current Research Festival

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  • 2024
    • General Schedule of Events
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    • Special Wednesday Events
    • Vendor Exhibit Information
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  • 2023
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    • NIH Early–Career Investigator Lectures
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  • 2021
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    • General Schedule of Events
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    • Technical Sales Association (TSA) Research Festival Exhibit Tent Show
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  • 2018
    • General Schedule of Events
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    • Technical Sales Association (TSA) Research Festival Exhibit Tent Show
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    • General Schedule of Events
    • Plenary Sessions
    • Concurrent Symposia Sessions
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    • Future Research Leaders
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