Erschienen in:
01.10.2015 | Translational Neurosciences - Original Article
mRNA expression of dopamine receptors in peripheral blood lymphocytes of computer game addicts
verfasst von:
Nasim Vousooghi, Seyed Zeinolabedin Zarei, Mitra-Sadat Sadat-Shirazi, Fatemeh Eghbali, Mohammad Reza Zarrindast
Erschienen in:
Journal of Neural Transmission
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Ausgabe 10/2015
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Abstract
Excessive playing of computer games like some other behaviors could lead to addiction. Addictive behaviors may induce their reinforcing effects through stimulation of the brain dopaminergic mesolimbic pathway. The status of dopamine receptors in the brain may be parallel to their homologous receptors in peripheral blood lymphocytes (PBLs). Here, we have investigated the mRNA expression of
dopamine D3, D4 and D5 receptors in PBLs of computer game addicts (n = 20) in comparison to normal subjects (n = 20), using a real-time PCR method. The results showed that the expression level of D3 and D4 dopamine receptors in computer game addicts were not statistically different from the control group. However, the expression of the mRNA of D5 dopamine receptor was significantly down-regulated in PBLs of computer game addicts and reached 0.42 the amount of the control group. It is concluded that unlike with drug addiction, the expression levels of the D3 and D4 dopamine receptors in computer game addicts are not altered compared to the control group. However, reduced level of the D5 dopamine receptor in computer game addicts may serve as a peripheral marker in studies where the confounding effects of abused drugs are unwanted.