Monthly Archives: November 2018
Inhibition of Monoacylglycerol Lipase Reduces the Reinstatement of Methamphetamine-Seeking and Anxiety-Like Behaviors in Methamphetamine Self-Administered Rats.
RESULTS:
JZL184 (32 and 40 mg/kg, i.p.), an inhibitor of monoacylglycerol lipase, significantly attenuated both the cue- and stress-induced reinstatement of methamphetamine-seeking behavior. Furthermore, URB597 (3.2 and 10 mg/kg, i.p.), an inhibitor of fatty acid amide hydrolase, attenuated only cue-induced reinstatement. AM251, a cannabinoid CB1 receptor antagonist, antagonized the attenuation of cue-induced reinstatement by JZL184 but not URB597. Neither JZL184 nor URB597 reinstated methamphetamine-seeking behavior when administered alone. In the elevated plus-maze test, rats that were in withdrawal from methamphetamine self-administration spent less time in the open arms. JZL184 ameliorated the decrease in time spent in the open arms.CONCLUSION:
We showed that JZL184 reduced both the cue- and stress-induced reinstatement of methamphetamine-seeking and anxiety-like behaviors in rats that had self-administered methamphetamine. It was suggested that a decrease in 2-arachidonoylglycerol in the brain could drive the reinstatement of methamphetamine-seeking and anxiety-like behaviors.” https://www.ncbi.nlm.nih.gov/pubmed/30481332 https://academic.oup.com/ijnp/advance-article/doi/10.1093/ijnp/pyy086/5210886Cannabinoids, Chemical Senses, and Regulation of Feeding Behavior.
“The herb Cannabis sativa has been traditionally used in many cultures and all over the world for thousands of years as medicine and recreation.
However, because it was brought to the Western world in the late 19th century, its use has been a source of controversy with respect to its physiological effects as well as the generation of specific behaviors. In this regard, the CB1 receptor represents the most relevant target molecule of cannabinoid components on nervous system and whole-body energy homeostasis.
Thus, the promotion of CB1 signaling can increase appetite and stimulate feeding, whereas blockade of CB1 suppresses hunger and induces hypophagia.
Taste and flavor are sensory experiences involving the oral perception of food-derived chemicals and drive a primal sense of acceptable or unacceptable for what is sampled. Therefore, research within the last decades focused on deciphering the effect of cannabinoids on the chemical senses involved in food perception and consequently in the pattern of feeding.
In this review, we summarize the data on the effect of cannabinoids on chemical senses and their influences on food intake control and feeding behavior.”
https://www.ncbi.nlm.nih.gov/pubmed/30481264
“Asthma is characterized by chronic lung inflammation and airway hyperresponsiveness. Asthma remains a major public health problem and, at present, there are no effective interventions capable of reversing airway remodelling.
“A growing number of evidences accumulated about critical metabolic role of cannabinoid type 1 receptor (CB1), carnitine palmitoyltransferase-1 (CPT1) and peroxisome proliferator-activated receptors (PPARs) in some peripheral tissues, including adipose tissue, liver, skeletal muscle and heart.
Taken together, these data indicate that the inhibition of CB1 could ameliorate lipid metabolism via the stimulation of the CPT1A and CPT1B expression in vivo. Simultaneously, the PPARα and PPARγ expression levels significantly differed compared to that of PPARβ in obesity and lipid metabolism-related disorders under blockade of CB1.
Both the mechanism of the influence of CB1 inhibition on lipid metabolism in the examined tissues and the specific mechanism of PPARα, PPARγ and PPARβ involvement in lipid exchange under these conditions remain to be further elucidated.”