Serotonin modifies corticotropin-releasing factor-induced behaviors of chicks

Rong Zhang, Tetsuya Tachibana, Tomo Takagi, Tomoyuki Koutoku, D. Michael Denbow, Mitsuhiro Furuse

Research output: Contribution to journalArticlepeer-review

43 Citations (Scopus)


Glucagon-like peptide-1 (GLP-1) decreased corticotropin-releasing factor (CRF)-induced behaviors in neonatal chicks, and serotonin is one of the possible mechanisms through which GLP-1 affects CRF-induced behaviors. The present experiments were conducted to confirm the effect of serotonin on CRF-induced behaviors. In Experiment 1, chicks were intracerebroventricularly injected with either saline, 0.1μg of CRF, 5.0μg of serotonin, or 0.1μg of CRF plus 5.0μg of serotonin. Injection of CRF caused excitation as evidenced by increased spontaneous activities and distress vocalizations (DVs) compared to the control group. The effect of CRF was attenuated by serotonin since chicks became quiet after given CRF with serotonin. Sleep-like behaviors were observed in the serotonin group. The number of defecations was increased by CRF and decreased by serotonin. Both CRF and serotonin increased plasma corticosterone, and the effect was synergistic. Serotonin dose-dependently decreased locomotor activities of chicks after central administration of 0.1μg of CRF, 0.1μg of CRF plus 2.5, 5.0, or 10.0μg of serotonin in Experiment 2. CRF-induced DVs were modified by serotonin. Instead of DVs, tender and low-pitched vocalizations were observed in chicks treated with CRF plus serotonin, the voice frequencies of which were less than 10kHz. In conclusion, serotonin attenuated the CRF-induced behaviors while stimulating corticosterone release. These results indicate that the role of serotonin is dependent on the behaviors being measured.

Original languageEnglish
Pages (from-to)47-52
Number of pages6
JournalBehavioural Brain Research
Issue number1-2
Publication statusPublished - May 5 2004

All Science Journal Classification (ASJC) codes

  • Behavioral Neuroscience


Dive into the research topics of 'Serotonin modifies corticotropin-releasing factor-induced behaviors of chicks'. Together they form a unique fingerprint.

Cite this