The mechanisms of response to radiation exposure are conserved in plants and animals. The DNA damage response (DDR) pathways are the predominant molecular pathways activated upon exposure to radiation, both in plants and animals. The conserved features of DDR in plants and animals might facilitate interdisciplinary studies that cross traditional boundaries between animal and plant biology in order to expand the collection of biomarkers currently used for radiation exposure monitoring (REM) in environmental and biomedical settings. Genes implicated in trans-kingdom conserved DDR networks often triggered by ionizing radiation (IR) and UV light are deposited into biological databases. In this study, we have applied an innovative approach utilizing data pertinent to plant and human genes from publicly available databases towards the design of a 'plant radiation biodosimeter', that is, a plant and DDR gene-based platform that could serve as a REM reliable biomarker for assessing environmental radiation exposure and associated risk. From our analysis, in addition to REM biomarkers, a significant number of genes, both in human and Arabidopsis thaliana, not yet characterized as DDR, are suggested as possible DNA repair players. Last but not least, we provide an example on the applicability of an Arabidopsis thaliana-based plant system monitoring the role of cancer-related DNA repair genes BRCA1, BARD1 and PARP1 in processing DNA lesions.

Centre of Systems Biology Biomedical Research Foundation Academy of Athens 11527 Athens Greece

Department of Biology and Biotechnology 'Lazzaro Spallanzani' via Ferrata 1 27100 Pavia Italy

Department of Computer Science and Biomedical Informatics University of Thessaly Papasiopoulou 2 4 35100 Lamia Greece

DNA Damage Laboratory Physics Department School of Applied Mathematical and Physical Sciences National Technical University of Athens Iroon Polytechniou 9 15780 Zografou Greece

Gregor Mendel Institute Dr Bohr Gasse 3 1030 Vienna Austria

Institute of Experimental Botany ASCR Na Karlovce 1 16000 Praha Czech Republic

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