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The endocannabinoids: Functional roles and therapeutic opportunities
Date:10/14/2007

Cannabis (marijuana) is the most widely produced plant-based illicit drug worldwide and the illegal drug most frequently used in Europe. Its use increased in almost all EU countries during the 1990s, in particular among young people, including school students. Cannabis use is highest among 15- to 24-year-olds, with lifetime prevalence ranging for most countries from 2040% (EMCDDA 2006).

Recently there has been a new surge in the level of concern about potential social and health outcomes of cannabis use, although the available evidence still does not provide a clear-cut understanding of the issues. Intensive cannabis use is correlated with non-drug-specific mental problems, but the question of co-morbidity is intertwined with the questions of cause and effect (EMCDDA 2006). Prevention is of importance in adolescents, which is underlined by evidence that early-onset cannabis-users (pre- to mid-adolescence) have a significantly higher risk of developing drug problems, including dependence (Von Sydow et al., 2002; Chen et al., 2005).

The illegal status and wide-spread use of cannabis made basic and clinical cannabis research difficult in the past decades; on the other hand, it has stimulated efforts to identify the psychoactive constituents of cannabis. As a consequence, the endocannabinoid system was discovered, which was shown to be involved in most physiological systems the nervous, the cardiovascular, the reproductive, the immune system, to mention a few.

One of the main roles of endocannabinoids is neuroprotection, but over the last decade they have been found to affect a long list of processes, from anxiety, depression, cancer development, vasodilatation to bone formation and even pregnancy (Panikashvili et al., 2001; Pachter et al., 2006).

Cannabinoids and endocannabinoids are supposed to represent a medicinal treasure trove which waits to be discovered.

What is the endocannabinoid system?

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Contact: Professor Raphael Mechoulam
mechou@cc.huji.ac.il
European College of Neuropsychopharmacology
Source:Eurekalert

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