Journal: Mutation research
Article Title: The ATM kinase signaling induced by the low-energy ?-particles emitted by 33 P is essential for the suppression of chromosome aberrations and is greater than that induced by the energetic ?-particles emitted by 32 P
doi: 10.1016/j.mrfmmm.2011.01.005
Figure Lengend Snippet: DNA damage signaling is induced in IMR90 cells exposed to the β-particles emitted by 33Por 32P. ATM kinase-dependent signaling is identified by concurrent treatment with the selective ATM kinase inhibitor 10 μM KU55933. Cells were exposed to 1 mCi/2 ml 33P- or 32P-orthophoshate, harvested at either 30 min or 1 h and cytoplamic, soluble nuclear and micrococcal nuclease-digested chromatin fractions were prepared. Protein extracts were resolved and immunoblotted for (A) p53, (B) ATM and (C) CHK2 using both phosphospecific and generic antisera.
Article Snippet: Cultivation, metabolic labelling and irradiation The normal diploid fetal human lung fibroblast cell line IMR90 (ATCC, Manassas, VA) was cultured in DMEM (Lonza, Basel, Switzerland) supplemented with 10% FBS (Atlanta Biologicals, Lawrenceville, GA).
Techniques: