This project is based on a multidisciplinary, international collaboration to study the role of cannabinoid receptors and the endocannabinoid system in behavior, pharmacology and physiology of cognitive function. The collaboration entails an unprecedented approach to the study of long-term effects of cannabinoid CB1 receptor agonists, inverse agonists/antagonists and neutral antagonists. Specific studies for this project will address several issues of concern necessary for the effective use of preclinical models (i.e. EEG) and novel cannabinoid antagonists that are translational and can be directly applied across species from rodent to human. These tools will be utilized to probe cannabinoid involvement in anxiety, stress and sleep cycle to enrich our understanding of no The project will (1) utilize 24-hr EEG monitoring in rats to examine the consequences of chronic exposure to cannabinoid CB1 receptor agonists and antagonists on the sleep cycle with respect to behavior and neural function;(2) compare effective routes of administration of cannabinoid agonists and antagonists;and (3) examine several novel antagonists with respect to rat behavior and hippocampal neural activity. The proposed experiments will thus extend studies of systemic and local infusion of cannabinoid CB1 receptor agonists and antagonists on neural activity mediating spatial memory in rats.
These Aims will provide important new techniques for examining long-term consequences of exposure to cannabinoid agonists (as positive controls) vs. antagonists - including novel inverse agonists, neutral antagonists and modulators that are just now becoming available for research use. The project includes translational aspects by incorporating techniques that can bridge studies in rats, mice and humans. The scope of this project has been reduced from the original 5-year plan, and the specific Aims have been changed to focus on two specific techniques (EEG and route of administration) and one preliminary scientific investigation (behavioral and electrophysiological effects of novel cannabinoid antagonists).
This project significantly contributes to our understanding of how normal brain mechanisms represent information about the surrounding environment. A primary goal of this project is to develop techniques that will further our understanding of the means by which such information is altered or modified either by exogenous cannabinoids such as marijuana, or endogenous sources of cannabinoids that occur naturally in the brain and play a critical role in brain function. This project explores the role of cannabinoids with respect to sleep, differential effects of route of administration, and explores several novel cannabinoid antagonists in assessments of behavioral and emotional state that will assist in the understanding of how and why cannabinoid drugs are abused.
Showing the most recent 10 out of 41 publications
