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Comparative study on the inactivation of MS2 and M13 bacteriophages using energetic femtosecond lasers

Berchtikou, Aziz, Sokullu, Esen, Nahar, Sharifun, Tijssen, Peter, Gauthier, Marc A. et Ozaki, Tsuneyuki (2020). Comparative study on the inactivation of MS2 and M13 bacteriophages using energetic femtosecond lasers Journal of Biophotonics , vol. 13 . p. 1-15. DOI: 10.1002/jbio.202000109.

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Résumé

Femtosecond (fs) laser irradiation techniques are emerging tools for inactivating viruses that do not involve ionizing radiation. In this work, the inactivation of two bacteriophages representing protective capsids with different geometric constraints, i.e. the near-spherical MS2 (with a diameter of 27 nm) and the filamentous M13 (with a length of 880 nm) is compared using energetic visible and near-infrared (NIR) femtosecond laser pulses with various energies, pulse durations, and exposure times. Intriguingly, the results show that inactivation using 400 nm lasers is substantially more efficient for MS2 compared to M13. In contrast, using 800 nm lasers, M13 was slightly more efficiently inactivated. For both viruses, the genome was exposed to a harmful environment upon fs-laser irradiation. However, in addition to the protection of the genome, the metastable capsids differ in many properties required for stepwise cell entry that may explain their dissimilar behavior after (partial) disassembly. For MS2, the dominant mechanism of femtosecond-laser inactivation was the aggregation of the viral capsid proteins, whereas aggregation did not affect M13 inactivation, suggesting that the dominant mechanism of M13 inactivation was related to breaking of secondary protein links. This article is protected by copyright. All rights reserved.

Type de document: Article
Mots-clés libres: -
Centre: Centre Énergie Matériaux Télécommunications
Date de dépôt: 15 juill. 2021 00:52
Dernière modification: 15 juill. 2021 00:52
URI: https://espace.inrs.ca/id/eprint/11548

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