Behavioral reactivity following 5-MeODMT administration in 5,7-DHT-pretreated killer rats.
Pharmacology, biochemistry, and behavior June 1, 1990 DOI: 10.1016/0091-3057(90)90405-7 via PubMed
Summary
AI-generated from the abstractRats classified as killers, nonkillers, or grouped received a brain injection of a chemical that destroys serotonin fibers or a placebo. After 7-10 days, all rats showed typical behaviors (forepaw treading, hindlimb abduction) when given a serotonin-like drug. Nonkiller and grouped rats with the lesion showed heightened behavioral responses, indicating supersensitivity. Killer rats with the same lesion showed a smaller increase in these behaviors. Serotonin uptake measurements confirmed that the lesion reduced serotonin uptake equally in all lesioned rats. The findings suggest that killer rats have a reduced ability to adapt their serotonin systems after damage.
Study at a glance
| Characteristics | Experimental study Peer reviewed |
|---|---|
| Population | Rats classified as grouped, nonkiller, and killer |
| Intervention | 5 |
| Duration | 7-10 days |
| Citations | 4 |
| Key finding | Killer rats showed a reduced increase in serotonin-induced behaviors after destruction of serotonin fibers compared to nonkiller and grouped rats, despite comparable reductions in serotonin uptake. |
Abstract
Grouped, nonkiller and killer animals were centrally injected either with vehicle or with 5,7-dihydroxytryptamine. After a period of 7-10 days, forepaw treading and hindlimb abduction were induced by 5-MeODMT administration in all sham and lesioned rats. As expected, behavioral supersensitivity was observed in grouped and nonkiller lesioned rats. A reduced increase in 5-MeODMT-induced behaviors was obtained in killer lesioned animals. 5-HT uptake studies showed a comparable reduction of 5-HT uptake within all the lesioned rats. This evidence suggests an altered capacity to promote adaptive changes on 5-HT sites in killer rats following the destruction of central serotonergic fibers.