Contrary to these reports, an increase in SAMe levels, together with DNMT1 up-regulation in the tamoxifen-resistant breast cancer cell line TAMR-MCF-7, was reported to lead to PTEN (Phosphatase and tensin homolog) promoter methylation downregulating PTEN expression and increasing Akt phosphorylation. The gene discussed is PTEN; the disease is breast carcinoma.