Inorganic trivalent arsenic is a major environmental pollutant and exposure to human results in many pathologies, including keratosis and carcinoma. Here, we analyzed the effects of B. subtilis spores on human normal keratinocytes in the presence of sodium arsenite oxidative stress. Pre-treatment of cells with spores before inducing oxidative stress was able to keep normal levels of intracellular ROS, GSH and lipid peroxidation, as well as to inhibit the activation of the MAPK cascade. Moreover, spores showed a positive effect on cell proliferation, probably due to their binding on the cell surface and the activation of intracellular catalases. We found that spores exert their protective effect by the nuclear translocation of Nrf-2, involved in the activation of stress response genes. This, in turn, resulted in a protective effect against sodium arsenite stress injury, as oxidative stress markers were reported to physiological levels when cells were stressed before incubating them with spores. Therefore, B. subtilis spores can be considered as a new agent to counteract oxidative stress on normal human keratinocytes.

Alternative use of Bacillus subtilis spores: Protection against environmental oxidative stress in human normal keratinocytes / Petruk, Ganna; Donadio, Giuliana; Lanzilli, Mariamichela; Isticato, Rachele; Monti, Daria Maria. - In: SCIENTIFIC REPORTS. - ISSN 2045-2322. - 8:1(2018), p. 1745. [10.1038/s41598-018-20153-2]

Alternative use of Bacillus subtilis spores: Protection against environmental oxidative stress in human normal keratinocytes

Petruk, Ganna
Primo
Investigation
;
Donadio, Giuliana
Secondo
Investigation
;
Lanzilli, Mariamichela;Isticato, Rachele
Funding Acquisition
;
Monti, Daria Maria
Ultimo
2018

Abstract

Inorganic trivalent arsenic is a major environmental pollutant and exposure to human results in many pathologies, including keratosis and carcinoma. Here, we analyzed the effects of B. subtilis spores on human normal keratinocytes in the presence of sodium arsenite oxidative stress. Pre-treatment of cells with spores before inducing oxidative stress was able to keep normal levels of intracellular ROS, GSH and lipid peroxidation, as well as to inhibit the activation of the MAPK cascade. Moreover, spores showed a positive effect on cell proliferation, probably due to their binding on the cell surface and the activation of intracellular catalases. We found that spores exert their protective effect by the nuclear translocation of Nrf-2, involved in the activation of stress response genes. This, in turn, resulted in a protective effect against sodium arsenite stress injury, as oxidative stress markers were reported to physiological levels when cells were stressed before incubating them with spores. Therefore, B. subtilis spores can be considered as a new agent to counteract oxidative stress on normal human keratinocytes.
2018
Alternative use of Bacillus subtilis spores: Protection against environmental oxidative stress in human normal keratinocytes / Petruk, Ganna; Donadio, Giuliana; Lanzilli, Mariamichela; Isticato, Rachele; Monti, Daria Maria. - In: SCIENTIFIC REPORTS. - ISSN 2045-2322. - 8:1(2018), p. 1745. [10.1038/s41598-018-20153-2]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/700089
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