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GH3 rat neuroadenoma, Molt-4 T-lymphoblastoid, and C6 rat glioblastoma cells were exposed to 900 MHz GSM for 4 hours at an estimated SAR or ~2 W/kg in an anechoic chamber. Proliferation rate was analyzed 24 or 48 hours post-exposure using the MTT (mitochondrial dehydrogenase enzyme) assay, and did not indicate any biologically significant effects on the rate of proliferation. In a related study, embryonic stem (ES), human lymphoma (U87MG) cells, endothelial cells, and brain cells exposed to 900 MHz and 1800 MHz (GSM) and analyzed for apoptosis, proliferation, and cell cycle alterations using 3H-thymidine incorporation, flow cytometry, and video time-lapse microscopy. In an initial report in Rhodes Greece in 2002, the authors reported no effects on apoptosis in U87MG cells exposed for 44-48 hours at 2 W/kg. |