Alfred Medical Research and Education Precinct View Institution's Website 4 articles published in JoVE Biology Clonogenic Assay: Adherent Cells Haloom Rafehi1,2, Christian Orlowski1,2,3, George T. Georgiadis1, Katherine Ververis1,4, Assam El-Osta2,3, Tom C. Karagiannis1,2 1Epigenomic Medicine, BakerIDI Heart and Diabetes Institute, The Alfred Medical Research and Education Precinct, 2Department of Pathology, The University of Melbourne, 3Epigenetics in Human Health and Disease, BakerIDI Heart and Diabetes Institute, The Alfred Medical Research and Education Precinct, 4Department of Anatomy and Cellular Biology, The University of Melbourne The applicability of the clonogenic assay for evaluating reproductive viability has been established for more than 50 years. Here we demonstrate the general procedure for performing the clonogenic assay with adherent cells. Biology Evaluation of the Spatial Distribution of γH2AX following Ionizing Radiation Raja S. Vasireddy1,2,3, Michelle M. Tang1,2, Li-Jeen Mah2,3, George T. Georgiadis2, Assam El-Osta1,3, Tom C. Karagiannis2,3 1Epigenetics in Human Health and Disease, BakerIDI Heart and Diabetes Institute, The Alfred Medical Research and Education Precinct, 2Epigenomic Medicine, BakerIDI Heart and Diabetes Institute, The Alfred Medical Research and Education Precinct, 3Department of Pathology, University of Melbourne Microscopic analysis of γH2AX foci, which form following the phosphorylation of H2AX at Ser-139 in response to DNA double-strand breaks, has become an invaluable tool in radiation biology. Here we used an antibody to mono-methylated histone H3 at lysine 4 as an epigenetic marker of actively transcribing euchromatin, to evaluate the spatial distribution of radiation-induced γH2AX formation within the nucleus. Biology Quantitation of γH2AX Foci in Tissue Samples Michelle M. Tang1,2, Li-Jeen Mah1,3, Raja S. Vasireddy1,2,3, George T. Georgiadis1, Assam El-Osta2,3, Simon G. Royce3,4,5, Tom C. Karagiannis1,3 1Epigenomic Medicine, Baker IDI Heart and Diabetes Institute, The Alfred Medical Research and Education Precinct, 2Epigenetics in Human Health and Disease, Baker IDI Heart and Diabetes Institute, The Alfred Medical Research and Education Precinct, 3Department of Pathology, The University of Melbourne, 4Department of Allergy and Immunology, Murdoch Children's Research Institute, Royal Children's Hospital, 5Department of Pediatrics, The University of Melbourne Quantitation of DNA double-strand breaks on the basis of γH2AX foci has become an invaluable tool, particularly in radiation biology, for the evaluation of tissue radiosensitivity and effects of radiation modifying compounds. Here we demonstrate the use of an immunofluorescence assay for quantitation of γH2AX foci in tissue samples. Biology Quantification of γH2AX Foci in Response to Ionising Radiation Li-Jeen Mah1,2, Raja S. Vasireddy1,2,3, Michelle M. Tang1,3, George T. Georgiadis1, Assam El-Osta2,3, Tom C. Karagiannis1,2 1Epigenomic Medicine, Baker IDI Heart and Diabetes Institute, The Alfred Medical Research and Education Precinct, 2Department of Pathology, The University of Melbourne, 3Epigenetics in Human Health and Disease, Baker IDI Heart and Diabetes Institute, The Alfred Medical Research and Education Precinct Quantification of DNA double-strand streaks using γH2AX formation as a molecular marker has become an invaluable tool in radiation biology. Here we demonstrate the use of an immunofluorescence assay for quantification of γH2AX foci after exposure of cells to radiation.