For these reasons, it would be valuable if a biological test could be developed that predicted the risk for developing cannabis psychosis. This test could be used to advise people who abuse cannabis or to inform marijuana-prescribing decisions by physicians.
Recent research has implicated a variation in the gene that codes for a protein called RAC-alpha serine/threonine-protein kinase (Akt1) in the risk for cannabis psychosis. However, independent verification of these findings is critical for genetic associations with complex genetic traits, like cannabis-related psychosis, because these findings are notoriously difficult to replicate.
Led by first author Dr. Marta Di Forti at King's College London's Institute of Psychiatry, genetic researchers carried out a case control study to investigate variation in the AKT1 gene and cannabis use in increasing the risk of psychosis.
Di Forti said, "We studied the AKT1 gene as this is involved in dopamine signaling which is known to be abnormal in psychosis. Our sample comprised 489 patients with their first episode of psychosis and 278 healthy controls."
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