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Endocannabinoids are implicated in appetite and body weight regulation. In rodents, anandamide stimulates eating by actions at central CB1 receptors, and hypothalamic endocannabinoids may be under the negative control of leptin. However, changes to brain endocannabinoid levels in direct relation to feeding or changing nutritional status have not been(More)
RATIONALE Central cannabinoid systems have been implicated in appetite control through the respective hyperphagic and anorectic actions of CB1 agonists and antagonists. The motivational changes underlying these actions remain to be determined, but may involve alterations to food palatability. OBJECTIVES The mode of action of cannabinoids on ingestion was(More)
RATIONALE Central cannabinoid systems have been implicated in appetite regulation by the respective hyperphagic actions of exogenous cannabinoids, such as delta9-THC, and hypophagic effects of selective cannabinoid receptor antagonists. OBJECTIVE This study examined whether an endogenous cannabinoid, anandamide, could induce overeating, via a specific(More)
Endogenous cannabinoid systems have been implicated in the physiological regulation of appetite by the ability of cannabinoid receptor agonists to induce hyperphagia. Both the exogenous cannabinoid Delta9-THC and the endocannabinoid arachidonoyl ethanolamide (anandamide) stimulate eating in rats. However, there has been no detailed analysis of the(More)
Using a pre-feed paradigm, the effects of orally-administered delta9-tetrahydrocannabinol (THC) on low baseline levels of nocturnal feeding were assessed. Following 2-h access to a palatable wet mash diet at dark onset, adult male Lister hooded rats (Charles River) were treated with either sesame seed oil vehicle or delta9- tetrahydrocannabinol (0.063,(More)
Presatiated adult male Lister hooded rats received oral administration of the exogenous cannabinoid Delta-9-tetrahydrocannabinol (Delta(9)-THC; 1.0 mg/kg) in combination with subcutaneous injection of either the cannabinoid CB1 antagonist N-piperidino-5-(4-chlorophenyl)-1-(2,4-dichlorophenyl)-4-methylpyrazole-3-carboxamide (SR141716; 0, 0.05, 0.1, 0.5 or(More)
Research into the endocannabinoid 'system' has grown exponentially in recent years, with the discovery of cannabinoid receptors and their endogenous ligands, such as anandamide and 2-arachidonoylglycerol (2-AG). Important advances have been made in our understanding of endocannabinoid transduction mechanisms, their metabolic pathways, and of the biological(More)
For obese individuals, successful weight loss and maintenance are notoriously difficult. Traditional drug development fails to exploit knowledge of the psychological factors that crucially influence appetite, concentrating instead on restrictive criteria of intake and weight reduction, allied to a mechanistic view of energy regulation. Drugs are under(More)
The time course of the suppressive action of naloxone on sham feeding was examined in gastric fistulated rats. One hour sham intake of 30% sucrose solution was halved by 1.25 mg/kg IP (-)-naloxone. A maximal 75% reduction was obtained with 2.5 mg/kg. Naloxone's effect appeared to mimic the attenuation of intake rate produced by sucrose dilution. The(More)
In two experiments observational analyses have been made of eating and other behaviours following naloxone administration. Naloxone produced a clearly defined profile of behavioural changes. Although rats became became more inactive it was demonstrated that this was not responsible for the inhibition of food intake. The drug reduced the latency to approach(More)