The Open Biochemistry Journal

ISSN: 1874-091X ― Volume 15, 2021

Transcriptional and Secretomic Profiling of Epidermal Cells Exposed to Alpha Particle Radiation

Vinita Chauhan*, 1, Matthew Howland 1, Hillary Boulay Greene 2, Ruth C Wilkins 1
1 Environmental and Radiation Health Sciences Directorate, Health Canada, Ottawa, Ontario, K1A 0K9, Canada
2 Capabilities for Asymmetric and Radiological Defence and Simulation, Defence R&D Canada Ottawa,Ottawa, ON, K1A 0Z4, Canada


Alpha (α)-particle emitters are probable isotopes to be used in a terrorist attack. The development of biological assessment tools to identify those who have handled these difficult to detect materials would be an asset to our current forensic capacity. In this study, for the purposes of biomarker discovery, human keratinocytes were exposed to α-particle and X-radiation (0.98 Gy/h at 0, 0.5, 1.0, 1.5 Gy) and assessed for differential gene and protein expression using microarray and Bio-Plex technology, respectively. Secretomic analysis of supernatants showed expression of two pro-inflammatory cytokines (IL-13 and PDGF-bb) to be exclusively affected in α-particle exposed cells. The highest dose of α-particle radiation modulated a total of 67 transcripts (fold change>|1.5|, (False discovery rate) FDR<0.05) in exposed cells. Several genes which responded with high expression levels (>2 fold) included KIF20A, NEFM, C7orf10, HIST1H2BD, BMP6, and HIST1H2AC. Among the high expressing genes, five (CCNB2, BUB1, NEK2, CDC20, AURKA) were also differentially expressed at the medium (1.0 Gy) dose however, these genes were unmodulated following exposure to X-irradiation. Networks of these genes clustered around tumor protein-53 and transforming growth factor-beta signaling. This study has identified some potential gene /protein responses and networks that may be validated further to confirm their specificity and potential to be signature biomarkers of α-particle exposure.

Keywords: Microarray, keratinocytes, alpha particles, biomarkers, gene expression, secretomics.

Article Information

Identifiers and Pagination:

Year: 2012
Volume: 6
First Page: 103
Last Page: 115
Publisher Id: TOBIOCJ-6-103
DOI: 10.2174/1874091X01206010103

Article History:

Received Date: 18/4/2012
Revision Received Date: 5/6/2012
Acceptance Date: 11/6/2012
Electronic publication date: 7/9/2012
Collection year: 2012

© Chauhan et al.; Licensee Bentham Open.

open-access license: This is an open access article licensed under the terms of the Creative Commons Attribution Non-Commercial License (http: // which permits unrestricted, non-commercial use, distribution and reproduction in any medium, provided the work is properly cited.

* Address correspondence to this author at the Room 314, Consumer and Clinical Radiation Protection Bureau, 6303B 775 Brookfield Rd., Ottawa, Ontario, K1A 0K9, Canada; Tel: (613) 941-8516; Fax: (613) 952-7584;E-mail:

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