RESUMO
Hepatocellular carcinomas will emerge as a major form of malignancy in the coming decades. When these tumors are in advanced stages, few therapeutic options are available. Therefore, it is essential to search for new treatment modalities to fight this disease. Evaluate the possible protective and therapeutic effects of Cannabis extract on dimethylnitrosamine [DMNA]-induced hepatocarcinogenicity in mice. Seventy-five male mice were divided into five groups of 15 each: group I mice received corn oil only as the control group; group II mice were injected intraperitoneally with DMNA [10 microg/kg body weight] weekly for 12 weeks; group III mice were pretreated orally with cannabis extract [0.5 ml/kg body weight] every other day for two weeks before the injection of DMNA, and continued until the end of the experiment [12 weeks]; group IV mice were treated orally with cannabis extract every other day simultaneously with DMNA injection and continued until the end of the experiment; group V mice were treated orally with cannabis extract every other day after receiving the last intraperitoneal injection of DMNA. A real time PCR was used to quantify telomerase reverse transcriptase and caspase-8 m-RNA expression level