Investigation of Methylation Levels in OPRK1 Gene Promoter among Smokers and Opium-Addicts underwent Methadone Maintenance Treatment
1.1. Background: Previous studies reported the association of the OPRK1 gene with illicit substances, nicotine, and alcohol. The present study aimed to look at the methylation levels of OPRK1 gene promoter among smokers and addicts who underwent metha done maintenance treatment (MMT). 1.2. Methods: DNAs were extracted from the whole blood of all male samples […]