ORCID
- Jha, Awadhesh: 0000-0001-9660-4308
Abstract
Toxicological risk assessment of medical devices requires genotoxicity assessment as per ISO 10993, Part 3, which is designed to address gene mutations, clastogenicity and/or aneugenicity endpoints. ‘Site of contact genotoxicity’ is a potential genotoxic risk especially for medical implants, that is currently not addressed in biocompatibility standards. We therefore performed initial validation study on the use of alkaline single cell gel electrophoresis (comet assay) for detecting ‘site of contact genotoxicity’ of medical devices, using test items made of acrylic implants impregnated with ethyl methanesulphonate (EMS). Comet assay detected increased DNA migration at the site of implantation, but not in the liver. The same implants also failed to show any genotoxicity potentials, when tested on the standard test battery using Salmonella/microsome and chromosome aberration assays. The study suggested that some medical implants can cause ‘site of contact genotoxicity’, without producing systemic genotoxicity. In conclusion, comet assay will add new dimension to safety assessment of medical devices, and this assay can be added to the battery of genetic toxicology tests for evaluating biocompatibility of medical implants.
DOI
10.1016/j.toxlet.2021.01.024
Publication Date
2021-05-01
Publication Title
Toxicology Letters
Volume
341
First Page
59
Last Page
67
ISSN
0378-4274
Embargo Period
2022-02-03
Organisational Unit
School of Biological and Marine Sciences
Recommended Citation
Jha, A. N. (2021) 'Site of contact genotoxicity’ assessment for implants - potential use of single cell gel electrophoresis in biocompatibility testing of medical devices', Toxicology Letters, 341, pp. 59-67. Available at: https://doi.org/10.1016/j.toxlet.2021.01.024
