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Article Dans Une Revue Journal of Biotechnology Année : 2023

Bacteria metabolic adaptation to oxidative stress: the case of silica

Résumé

Although the presence of silica in many living organisms offers advanced properties including cell protection, the different in vitro attempts to build living materials in pure silica never favoured the cells viability. Thus, little attention has been paid to host-guest interactions to modify the expected biologic response. Here we report the physiological changes undergone by Escherichia coli K-12 in silica from colloidal solution to gel confinement. We show that the physiological alterations in growing cultures are not triggered by the initial oxidative Reactive Oxygen Species (ROS) response. Silica promotes the induction of alternative metabolic pathways along with an increase of growth suggesting the existence of rpoS polymorphisms. Since the functionality of hybrid materials depends on the specific biologic responses of their guests, such cell physiological adaptation opens perspectives in the design of bioactive devices attracting for a large field of sciences
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hal-04185169 , version 1 (22-08-2023)

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Paternité - Pas d'utilisation commerciale - Pas de modification

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Mercedes Perullini, Sophie Dulhoste, François Ribot, Gérard Pehau-Arnaudet, Odile M.M. Bouvet, et al.. Bacteria metabolic adaptation to oxidative stress: the case of silica. Journal of Biotechnology, 2023, 374, pp.80-89. ⟨10.1016/j.jbiotec.2023.08.002⟩. ⟨hal-04185169⟩
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