Author:

Lutter M, Sakata I, Osborne-Lawrence S, Rovinsky SA, Anderson JG, Jung S, Birnbaum S, Yanagisawa M, Elmquist JK, Nestler EJ, Zigman JM

Scientific Notation:

Nature Neuroscience. 11:7530753, 2008.

Publication:

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2765052

Abstract:

We found that increasing ghrelin levels, through subcutaneous injections or calorie restriction, produced anxiolytic- and antidepressant-like responses in the elevated plus maze and forced swim test. Moreover, chronic social defeat stress, a rodent model of depression, persistently increased ghrelin levels, whereas growth hormone secretagogue receptor (Ghsr) null mice showed increased deleterious effects of chronic defeat. Together, these findings demonstrate a previously unknown function for ghrelin in defending against depressive-like symptoms of chronic stress.

FPWR Grant:

The role of the midbrain dopaminergic reward circuitry in ghrelin's effects on food intake and body weight