Comparative study and simulation of tumor cell inactivation by microwave and conventional heating
| Autor: | Monika Willert-Porada, Thorsten Gerdes, Udo S. Gaipl, Corinna Drescher, Benjamin Frey, Michael Hader, Andreas Rosin, Magdalena Suntinger |
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| Rok vydání: | 2018 |
| Předmět: |
0301 basic medicine
Arrhenius equation Range (particle radiation) Materials science Scanning electron microscope Applied Mathematics Analytical chemistry Field effect Tumor cells Computer Science Applications Chemical kinetics 03 medical and health sciences symbols.namesake 030104 developmental biology 0302 clinical medicine Computational Theory and Mathematics 030220 oncology & carcinogenesis Thermal symbols Electrical and Electronic Engineering Microwave |
| Zdroj: | COMPEL - The international journal for computation and mathematics in electrical and electronic engineering. 37:1893-1904 |
| ISSN: | 0332-1649 |
| Popis: | Purpose This paper aims to investigate in a self-designed closed loop reactor process conditions for thermal inactivation of B16 melanoma cells by microwave and conventional heating. Design/methodology/approach Besides control experiments (37°C), inactivation rate was determined in the range from 42°C to 46°C. Heating was achieved either by microwave radiation at 2.45 GHz or by warm water. To distinguish viable from dead cells, AnnexinV staining method was used and supported by field effect scanning electron microscopy (FE-SEM) imaging. Furthermore, numerical simulations were done to get a closer look into both heating devices. To investigate the thermal influence on cell inactivation and the differences between heating methods, a reaction kinetics approach was added as well. Findings Control experiments and heating at 42°C resulted in low inactivation rates. Inactivation rate at 44°C remained below 12% under conventional, whereas it increased to >70% under microwave heating. At 46°C, inactivation rate attained 68% under conventional heating; meanwhile, even 88% were determined under microwave heating. FE-SEM images showed a porous membrane structure under microwave heating in contrast to mostly intact conventional heated cells. Numerical simulations of both heating devices and a macroscopic Arrhenius approach could not sufficiently explain the observed differences in inactivation. Originality/value A combination of thermal and electrical effects owing to microwave heating results in higher inactivation rates than conventional heating achieves. Nevertheless, it was not possible to determine the exact mechanisms of inactivation under microwave radiation. |
| Databáze: | OpenAIRE |
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