In another study, HT22 mouse hippocampal neuronal cells and SH-SY5Y human neuroblastoma cells were exposed to 1950 MHz [152] with a high-power Specific Absorption Rate (SAR) of 6 W/kg for two hours per day for 3 days, the levels of APP, Aβ precursor protein cleaving enzyme 1, disintegrin metalloproteinase 10, and Presenilin-1 were not significantly different between EMF exposed culture and controls exposures. This evidence concerns the gene APP and neuroblastoma.