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Effects of tetra hydro cannabinol to the dendritc tree and synapses of the accumbens nucleus of wistar rats

Author(s): Dimitrijević I. | Aksić M. | Aleksić Dubravka | Dimitrijević Nina | Anđelić S. | Stijak L. | Stanković Gordana | Janković S. | Filipović B.

Journal: Acta Veterinaria
ISSN 0567-8315

Volume: 63;
Issue: 1;
Start page: 37;
Date: 2013;
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Keywords: axodendric synapse | Cannabis sativa | septal region | shell of accumbens nucleus

Cannabis is one of the most widely used intoxicants; almost half of all 18 year olds in the USA and in most European countries admit to having tried it at least once, and ~10% of that age group are regular users. Δ9-Tetrahydrocannabinol (THC), the principal psychoactive ingredient in marijuana, produces euphoria and relaxation and impairs motor coordination, time sense, and short term memory. In the hippocampus, CBs inhibit GABA release from a subset of interneurons and inhibit glutamate release from principal neurons. Cannabinoids are reported to produce both rapid and long-term changes in synaptic transmission. Our study was carried out on ten male rats out of which brains of six of them were used as the representative sample for electron microscope analysis, while 4 were used for light microspcopy performed by Golgi method. Three were exposed to THC and 3 were controls. Axodendric synapses in the core and shell of the accumbens nucleus (AN) were studied under electron microscope. The results have shown widening of the synaptic cleft in the shell of AN. This result is a leading point to our further investigations which are going to involve a behavioral component, and different aspects of morphological studies. [Projekat Ministarstva nauke Republike Srbije, br. III 41020]
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