Anxiogenic effects of a beta-carboline on tonic immobility and open field behavior in chickens (Gallus gallus).
Level 5 - mechanism / opinion, no new human data
Animal research evaluating pharmacological effects in chickens.
PubMed 7675861 · doi:10.1016/0091-3057(95)00036-v
What was done
Chickens (Gallus gallus) received injections of the alpha-GABAA inverse agonist beta-CCM (beta-carboline-3-carboxylic acid-N-methylamide) or control injections to assess effects on tonic immobility duration, tonic immobility susceptibility, and open field behavior (activity and vocalization).
What was found
The abstract reports no numerical values or sample sizes. Birds given beta-CCM exhibited longer durations of tonic immobility compared to controls, with a non-significant trend toward increased susceptibility. In open field testing, beta-CCM reduced activity and vocalization compared to control levels.
Why it matters
The study supports the involvement of GABA systems in innate anti-predator fear responses and indicates that alpha-GABAA inverse agonists act as anxiogenic agents in avian models.
Limits
The abstract gives no sample size, dosage details, or quantitative metrics. The study was conducted in chickens, which limits direct applicability to human anxiety disorders.
Cited by
- contradicts Flipping an aggressive rooster or bird onto its back induces a state of calm (tonic immobility).