Connexion
S'inscrire
Réinitialiser le mot de passe
Publier & Distribuer
Solutions d'édition
Solutions de distribution
Thèmes
Architecture et design
Arts
Business et économie
Chimie
Chimie industrielle
Droit
Géosciences
Histoire
Informatique
Ingénierie
Intérêt général
Linguistique et sémiotique
Littérature
Mathématiques
Musique
Médecine
Pharmacie
Philosophie
Physique
Sciences bibliothécaires et de l'information, études du livre
Sciences des matériaux
Sciences du vivant
Sciences sociales
Sport et loisirs
Théologie et religion
Études classiques et du Proche-Orient ancient
Études culturelles
Études juives
Publications
Journaux
Livres
Comptes-rendus
Éditeurs
Blog
Contact
Chercher
EUR
USD
GBP
Français
English
Deutsch
Polski
Español
Français
Italiano
Panier
Home
Journaux
Gravitational and Space Research
Édition 2 (2022): Edition 1 (January 2022)
Accès libre
Oxygen and Silicon Ion Particles Induce Neoplastic Transformation in Human Colonic Epithelial Cells
Sang Bum Kim
Sang Bum Kim
,
Lu Zhang
Lu Zhang
et
Jerry W. Shay
Jerry W. Shay
| 18 janv. 2022
Gravitational and Space Research
Édition 2 (2022): Edition 1 (January 2022)
À propos de cet article
Article précédent
Article suivant
Résumé
Article
Figures et tableaux
Références
Auteurs
Articles dans cette édition
Aperçu
PDF
Citez
Partagez
Article Category:
Research Article
Publié en ligne:
18 janv. 2022
Pages:
32 - 41
DOI:
https://doi.org/10.2478/gsr-2014-0003
© 2014 Sang Bum Kim et al., published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.
Figure 1.
HZE particles increase growth advantage. HCEC CT7 cells were seeded in 6-well plate in triplicate and counted at 2 day intervals over a 7 day period. Irradiation promotes cellular proliferation rate, whereas CDDO-Me pretreatment attenuates this effect. Data represent mean ± s.d. of repeated experiments. ***p<0.005 in Student’s t-test.
Figure 2.
HZE particles increase neoplastic transformation. (A) HZE particles increase number of colonies formed in soft agar. (B) Sizes of soft agar colonies are bigger in HZE particle-irradiated cells than in unirradiated controls, as shown in the representative photographs and quantification. Colony size was measured from 15 to 25 colonies in each group. (C) HZE particles enhance cell migration in wound healing assay. (D) HZE particles promote invasion through Matrigel®. Data represent mean ± s.d. of repeated experiments. ***p<0.005, ****p<0.001 in Student’s t-test.
Figure 3.
HZE particles activate β-catenin signaling and affect DNA repair genes expression. (A) HZE particles decrease level of phospho-Stat3 (Y705), whereas increase level of active-β-catenin and cyclin D1 expression. CDDO-Me treatment reverses these effects. GAPDH is used as loading control. (B) HZE particles decrease series of DNA repair genes expression using DNA repair gene array. *p<0.05 in Student’s t-test in repeated experiments.
Figure 4.
CDDO-Me protects cells against HZE particles. Treatment of CDDO-Me before and during irradiation reverses transformative properties of irradiated HCEC CT7 cells in terms of number of soft agar colonies (A), sizes of soft agar colonies (B), cell migration (C), and invasion through Matrigel® (D). CDDO-Me treatment alone does not have any significant effects. Data represent mean ± s.d. of repeated experiments. *p<0.05, **p<0.01, ***p<0.005, ****p<0.001 in Student’s t-test.
Supplementary Figure S1.
Schematic flow-chart of experimental timeline. 4×104 cells were seeded into T25 flask 6 days prior to irradiation. Cells were shipped to the NASA Space Radiation Laboratory (NSRL) (Upton, NY) and maintained in a low oxygen incubator. HZE particle irradiations were performed at the NSRL with a mixed-field radiation scheme in which cells were exposed to 1-Gy of 250 MeV/nucleon 16O particles and then exposed to 1-Gy of 300 MeV/nucleon 28Si particles on the following day. To address radioprotection activity of CDDO-Me, the cells were treated with 50 nM CDDO-Me 18 h before first irradiation. The medium was changed after first irradiation with medium containing 50 nM CDDO-Me. After the last irradiation, cells were changed with fresh medium and shipped back to UT Southwestern. Irradiated cells were split, a half of the cells were frozen and stored for further assays, and the other half of cells were passage cultured for 4 weeks and then subjected to proliferation and soft-agar assays.
Supplementary Figure S2.
The first proliferation and soft-agar assays were performed 4 weeks after irradiation. A. HCEC CT7 cells which were passage-cultured for 4 weeks after irradiation were seeded in triplicate 6-well plates and counted at 2 day interval over a 7 day period. B. Cells which were passage-cultured for 4 weeks after irradiation were seeded in 0.375% soft-agar in triplicate 24-well plates. 4 weeks later, colonies larger than 0.1-mm diameter were counted and normalized to unirradiated control.
Aperçu