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Plasma Medicine

Publicado 4 números por año

ISSN Imprimir: 1947-5764

ISSN En Línea: 1947-5772

SJR: 0.216 SNIP: 0.263 CiteScore™:: 1.4 H-Index: 24

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Genotoxic and Cytotoxic Effects of Plasma-Activated Media on Multicellular Tumor Spheroids

Volumen 6, Edición 1, 2016, pp. 47-57
DOI: 10.1615/PlasmaMed.2016015823
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SINOPSIS

The purpose of this study was to evaluate the effect of plasma-activated media (PAM) on a multicellular tumor spheroid (MCTS) obtained using HCT116 colon carcinoma cells. PAM was processed by a helium plasma jet during 60−240 seconds of exposure. Spheroids were immersed in PAM at different transfer times (from 15 minutes to 48 hours). The inhibitory effect of PAM on cell growth was first evaluated. This growth inhibition is associated with the regionalized accumulation of DNA damage detected by histone H2AX phosphorylation, leading to massive cell death and loss of the MCTS proliferative region. The use of a hydrogen peroxide (H2O2) scavenger (catalase) in PAM induced the reduction of DNA-damaged cells in MCTS, thus pointing out the role of H2O2 in DNA damage, but growth inhibition was still observed. Finally, whenHCT116 colorectal cancer cells and GM637 human fibroblast cells were immersed in PAM, the expression of γH2AX showed that only HCT116 cells were damaged, emphasizing an interesting selectivity of PAM to inactivate only the cancerous cells in the framework of in vitro cases; this selectivity has already been noted in the literature.

CITADO POR
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