Live Impedance Measurements and Time-lapse Microscopy Observations of Cellular Adhesion, Proliferation and Migration after Ionizing Radiation

Author(s): Magdalena Skonieczna*, Malgorzata Adamiec, Dorota Hudy, Patrycja Nieslon, Daniel Fochtman, Patryk Bil

Journal Name: Current Pharmaceutical Biotechnology

Volume 21 , Issue 7 , 2020

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Graphical Abstract:


Background: Changes in the cellular behavior depend on environmental and intracellular interactions. Cancer treatments force the changes, first on the molecular level, but the main visible changes are macroscopic. During radiotherapy, cancer cell’s adhesion, proliferation and migration should be well monitored. In over 60% of diagnosed cancers cases, patients are given treatments with different protocols of radiotherapy, which result in possible metastasis and acute whole body response to toxic radiation.

Objective: Effectiveness of the therapy used depends on the sensitivity/resistance of irradiated cancer cells. Cellular mechanisms of cancer protection, such as the activation of DNA damage and repair pathways, antioxidants production and oxidative stress suppression during treatments are not desirable. Cancer cells monitoring require the development of novel techniques, and the best techniques are non-invasive and long-term live observation methods, which are shown in this study.

Methods: In cancers, invasive and metastatic phenotypes could be enhanced by stimulation of proliferation rate, decreased adhesion with simultaneous increase of motility and migration potential. For such reasons, the Ionizing Radiation (IR) stimulated proliferation; migration with lowered adhesiveness of cancer Me45 and normal fibroblasts NHDF were studied. Using impedance measurements technique for live cells, the adhesion of cells after IR exposition was assessed. Additionally proliferation and migration potential, based on standard Wound Healing assay were evaluated by timelapse microscopic observations.

Results: We found simulative IR dose-ranges (0.2-2 Gy) for Me45 and NHDF cells, with higher proliferation and adhesion rates. On the other hand, lethal impact of IR (10-12 Gy) on both the cell lines was indicated.

Conclusion: Over-confluence cell populations, characterized with high crowd and contact inhibition could modulate invasiveness of individual cells, convert them to display migration phenotype and advance motility, especially after radiotherapy treatments.

Keywords: Cell migration, ionizing radiation, time-lapse microscopy, wound healing assay, cell adhesion, invasive phenotype, Me45 melanoma cancer cells.

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Article Details

Year: 2020
Published on: 16 June, 2020
Page: [642 - 652]
Pages: 11
DOI: 10.2174/1389201021666191224121206
Price: $65

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