Related Experiment Videos
Food intake following systemic 6-hydroxydopamine injection
Medical Biology
|February 1, 1982
Summary
Rats treated with 6-hydroxydopamine (6-OHDA) showed reduced food intake, especially when not cold-acclimated. Cold exposure aided recovery of appetite after 6-OHDA administration, suggesting environmental factors influence recovery from drug-induced malaise.
Area of Science:
- Physiology
- Neuropharmacology
- Animal Behavior
Background:
- Adreno-demedullation and cold acclimation are known to affect physiological responses.
- 6-hydroxydopamine (6-OHDA) is a neurotoxin that depletes catecholamines.
- Environmental temperature influences metabolic rate and food intake.
Purpose of the Study:
- To investigate the effect of 6-hydroxydopamine (6-OHDA) on food intake in rats.
- To examine the role of cold acclimation in modulating the response to 6-OHDA.
- To explore the impact of adreno-demedullation on food intake following 6-OHDA treatment.
Main Methods:
- Rats were acclimated to 5°C or 23°C for 5 weeks.
- Intact and adreno-demedullated rats received intraperitoneal injections of 6-OHDA or saline.
- Food intake was monitored for 7 days post-injection.
Main Results:
- All 6-OHDA-treated rats exhibited a significant reduction in food intake on day 1 post-treatment (P<0.01).
- Cold-acclimated rats' food intake recovered to control levels by day 3.
- Non-cold-acclimated rats showed a delayed recovery, returning to control levels by day 7.
Conclusions:
- 6-OHDA administration causes a significant, albeit temporary, reduction in food intake.
- Cold acclimation accelerates the recovery of food intake following 6-OHDA treatment.
- Cardiovascular hypotension-induced malaise may contribute to reduced food intake after 6-OHDA, with environmental temperature influencing compensatory mechanisms.