A novel in vitro model of clinical cryoablation to investigate the transition zone for focal tumor ablation.

Autor: Vrabel MR; Joint Department of Biomedical Engineering, North Carolina State University & University of North Carolina-Chapel Hill, Raleigh, NC, USA; Comparative Medicine Institute, North Carolina State University, Raleigh, NC, USA. Electronic address: mrvrabel@ncsu.edu., Fesmire CC; Joint Department of Biomedical Engineering, North Carolina State University & University of North Carolina-Chapel Hill, Raleigh, NC, USA. Electronic address: chriscfesmire@gmail.com., Rich MJ; Joint Department of Biomedical Engineering, North Carolina State University & University of North Carolina-Chapel Hill, Raleigh, NC, USA. Electronic address: matthew_rich@med.unc.edu., Kobrin RL; Joint Department of Biomedical Engineering, North Carolina State University & University of North Carolina-Chapel Hill, Raleigh, NC, USA. Electronic address: rlkobrin@ncsu.edu., Sano MB; Joint Department of Biomedical Engineering, North Carolina State University & University of North Carolina-Chapel Hill, Raleigh, NC, USA; Comparative Medicine Institute, North Carolina State University, Raleigh, NC, USA; Department of Molecular and Biomedical Sciences, North Carolina State University, Raleigh, NC, USA. Electronic address: msano2@ncsu.edu., Zaharoff DA; Joint Department of Biomedical Engineering, North Carolina State University & University of North Carolina-Chapel Hill, Raleigh, NC, USA; Comparative Medicine Institute, North Carolina State University, Raleigh, NC, USA; Lineberger Comprehensive Cancer Center, University of North Carolina-Chapel Hill, Chapel Hill, NC, USA. Electronic address: dazaharo@ncsu.edu.
Jazyk: angličtina
Zdroj: Cryobiology [Cryobiology] 2024 Mar; Vol. 114, pp. 104844. Date of Electronic Publication: 2024 Jan 01.
DOI: 10.1016/j.cryobiol.2023.104844
Abstrakt: Cryoablation (CA) of solid tumors is highly effective at reducing tumor burden and eliminating small, early stage tumors. However, complete ablation is difficult to achieve and cancer recurrence is a significant barrier to treatment of larger tumors compared to resection. In this study, we explored the relationship between temperature, ice growth, and cell death using a novel in vitro model of clinical CA with the Visual-ICE (Boston Scientific) system, a clinically approved and widely utilized device. We found that increasing the duration of freezing from 1 to 2 min increased ice radius from 3.44 ± 0.13 mm to 5.29 ± 0.16 mm, and decreased the minimum temperature achieved from -22.8 ± 1.3 °C to -45.5 ± 7.9 °C. Furthermore, an additional minute of freezing increased the amount of cell death within a 5 mm radius from 42.5 ± 8.9% to 84.8 ± 1.1%. Freezing at 100% intensity leads to faster temperature drops and a higher level of cell death in the TRAMP-C2 mouse prostate cancer cell line, while lower intensities are useful for slow freezing, but result in less cell death. The width of transition zone between live and dead cells decreased by 0.4 ± 0.2 mm, increasing from one to two cycles of freeze/thaw cycles at 100% intensity. HMGB-1 levels significantly increased with 3 cycles of freeze/thaw compared to the standard 2 cycles. Overall, a longer freezing duration, higher freezing intensity, and more freeze thaw cycles led to higher levels of cancer cell death and smaller transition zones. These results have the potential to inform future preclinical research and to improve therapeutic combinations with CA.
(Copyright © 2024 Society for Cryobiology. Published by Elsevier Inc. All rights reserved.)
Databáze: MEDLINE
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