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RT effects on cell senescence and apoptosis. Primary CAF cultures were checked for senescence (β-Galactosidase assay,—panel A) and apoptosis (TUNEL assay—panel B) at day five after first radiation exposure. High extent of premature cell senescence (blue-stained cells), but not apoptosis was induced by high-dose radiation regimen. Scale Bar = 15 μm.
