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Bulletin de l'Academie Nationale de Medecine 2020-Apr

Les effets épigénétiques du cannabis / tétrahydrocannabinol.

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L'enllaç es desa al porta-retalls
J Costentin

Paraules clau

Resum

The almost pandemic spread of cannabis among adolescents and young adults, especially in France, justifies the attention given to the consequences, not only acute but also delayed, of this intoxication. In the latter case, epigenetic mechanisms occur. We will first recall various types of epigenetic modifications involving either chromatin histones, mainly methylations or acetylations; either DNA, by methylation of cytosines. Such modifications caused by the tetrahydrocannabinol/THC of cannabis can intervene: either at the level of gametes before procreation, or at different points of the life cycle. These epigenetic modifications are associated with an increase in vulnerability to drug addiction, involving dopamine D2 receptors in the nucleus accumbens, overexpression of enkephalin precursor synthesis, modifications of: CB1 receptors of endocannabinoids, glutamic acid receptors, GABA receptors, proteins involved in synaptic plasticity ... These changes can also affect: immune system, cognitive activities, development of psychiatric diseases, related to disturbances of brain maturation. The knowledge that accumulates in this respect is the opposite of the ambient trivialization of this drug. They impose sending an alert to the public authorities and to the public, especially young people, warning on the risks associated with this drug use and abuse.

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