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Huang Y, Dong Y, Gao B, Ma R, Gao FL, Shen L. Transmembrane Water Transport and Intracellular Ice Formation of Human Umbilical Vein Endothelial Cells During Freezing. Biopreserv Biobank 2022; 20:311-316. [PMID: 35984940 DOI: 10.1089/bio.2022.0111] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Long-term cryopreservation of human umbilical vein endothelial cells (HUVECs) is important and beneficial for a variety of biomedical research and applications. In this study, we investigated HUVEC's cryobiological characteristics and parameters that are indispensable for predicting and determining an optimal cooling rate to prevent lethal intracellular ice formation (IIF) and severe cell dehydration during the cryopreservation processes. The parameters include cell membrane hydraulic conductivity (i.e., cell membrane water permeability), Lp, cell membrane water permeability activation energy, Elp, and osmotically inactive volume of a cell Vb. Cryomicroscopy was used to study the IIF phenomena and cell volume excursion at various cooling rates, 1, 10, and 20°C/min, respectively, based on which the cryobiological parameters were determined using biophysical and mathematical models. Results from this research work laid an important cryobiological foundation for the optimization of HUVEC's cryopreservation conditions.
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Affiliation(s)
- Yu Huang
- School of Medical Imaging, Bengbu Medical College, Bengbu, China.,Department of Electronic Engineering and Information Science, University of Science and Technology of China, Hefei, China
| | - Ying Dong
- Division of Life Sciences and Medicine, The First Affiliated Hospital of USTC, University of Science and Technology of China (USTC), Hefei, China
| | - Brian Gao
- The College of Medicine, California Northstate University, Elk Grove, California, USA
| | - Ruidong Ma
- Department of Mechanical Engineering, University of Washington, Seattle, Washington, USA
| | - Frank Liu Gao
- School of Public Affairs, University of Science and Technology of China, Hefei, China
| | - Lingxiao Shen
- Department of Electronic Engineering and Information Science, University of Science and Technology of China, Hefei, China
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Fukuda Y, Higashiya M, Obata T, Basaki K, Yano M, Matsumura K, Ono K, Ohba T, Okamoto Y, Nishijima K, Seki S. Small-volume vitrification and rapid warming yield high survivals of one-cell rat embryos in cryotubes†. Biol Reprod 2021; 105:258-266. [PMID: 33783478 DOI: 10.1093/biolre/ioab059] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2020] [Revised: 02/09/2021] [Accepted: 03/17/2021] [Indexed: 01/28/2023] Open
Abstract
To cryopreserve cells, it is essential to avoid intracellular ice formation during cooling and warming. One way to achieve this is to convert the water inside the cells into a non-crystalline glass. It is currently believed that to accomplish this vitrification, the cells must be suspended in a very high concentration (20-40%) of a glass-inducing solute, and subsequently cooled very rapidly. Herein, we report that this belief is erroneous with respect to the vitrification of one-cell rat embryos. In the present study, one-cell rat embryos were vitrified with 5 μL of EFS10 (a mixture of 10% ethylene glycol (EG), 27% Ficoll, and 0.45 M sucrose) in cryotubes at a moderate cooling rate, and warmed at various rates. Survival was assessed according to the ability of the cells to develop into blastocysts and to develop to term. When embryos were vitrified at a 2613 °C/min cooling rate and thawed by adding 1 mL of sucrose solution (0.3 M, 50 °C) at a warming rate of 18 467 °C/min, 58.1 ± 3.5% of the EFS10-vitrified embryos developed into blastocysts, and 50.0 ± 4.7% developed to term. These rates were similar to those of non-treated intact embryos. Using a conventional cryotube, we achieved developmental capabilities in one-cell rat embryos by rapid warming that were comparable to those of intact embryos, even using low concentrations (10%) of cell-permeating cryoprotectant and at low cooling rates.
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Affiliation(s)
- Yasuyoshi Fukuda
- Experimental Animal Division, Bioscience Education and Research Support Center, Akita University, Akita, Akita, Japan
- Department of Cell Physiology, Akita University Graduate School of Medicine, Akita, Akita, Japan
| | - Misako Higashiya
- Experimental Animal Division, Bioscience Education and Research Support Center, Akita University, Akita, Akita, Japan
| | - Takahiro Obata
- Experimental Animal Division, Bioscience Education and Research Support Center, Akita University, Akita, Akita, Japan
| | - Keita Basaki
- Experimental Animal Division, Bioscience Education and Research Support Center, Akita University, Akita, Akita, Japan
| | - Megumi Yano
- Experimental Animal Division, Bioscience Education and Research Support Center, Akita University, Akita, Akita, Japan
| | - Kazuaki Matsumura
- School of Materials Science, Japan Advanced Institute of Science and Technology, Nomi, Ishikawa, Japan
| | - Kyoichi Ono
- Department of Cell Physiology, Akita University Graduate School of Medicine, Akita, Akita, Japan
| | | | - Yosuke Okamoto
- Department of Cell Physiology, Akita University Graduate School of Medicine, Akita, Akita, Japan
| | - Kazutoshi Nishijima
- Experimental Animal Division, Bioscience Education and Research Support Center, Akita University, Akita, Akita, Japan
- National Institute for Physiological Sciences, Okazaki, Aichi, Japan
- Center for Experimental Animals, National Institutes of Natural Sciences, Okazaki, Aichi, Japan
| | - Shinsuke Seki
- Experimental Animal Division, Bioscience Education and Research Support Center, Akita University, Akita, Akita, Japan
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Yuan F, Zhao G, Panhwar F. Enhanced killing of HepG2 during cryosurgery with Fe 3O 4-nanoparticle improved intracellular ice formation and cell dehydration. Oncotarget 2017; 8:92561-92577. [PMID: 29190938 PMCID: PMC5696204 DOI: 10.18632/oncotarget.21499] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2017] [Accepted: 09/08/2017] [Indexed: 12/17/2022] Open
Abstract
Cryosurgery is a minimally invasive treatment that utilize extreme low temperatures to destroy abnormal tissues. The clinical monitoring methods for cryosurgery are almost based on the visualization of the iceball. However, for a normal cryosurgery process, the effective killing region is always smaller than the iceball. As a result, the end of the cryosurgery process can only be judged by the surgeons according to their experience. The subjective judgement is one of the main reasons for poor estimation of tumor ablation, and it sparks high probability of recurrence and metastasis associate with cryosurgery. Being different from the previous optimization studies, we develop a novel approach with the aid of nanoparticles to enlarge the effective killing region of entire iceball, and thus it greatly decrease the difficulty of precise judgement of the cryosurgery only by applying the common clinical imaging methods. To verify this approach, both the experiments on a tissue-scale phantom with embedded living HepG2 cells in agarose and on a cell-scale cryo-microscopic freeze-thaw stage are performed. The results indicate that the introduction of the self-synthesized Fe3O4 nanoparticles significantly improved cell killing in the cryosurgery and the range of killing is extended to the entire iceball. The potential mechanism is further revealed by the cryo-microscopic experiments, which verifies the presence of Fe3O4 nanoparticles can significantly enhance the probability of intracellular ice formation and the cell dehydration during freezing hence it promote precise killing of the cells. These findings may further promote the widespread clinical application of modern cryosurgery.
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Affiliation(s)
- Fuquan Yuan
- Center for Biomedical Engineering, Department of Electronic Science and Technology, University of Science and Technology of China, Hefei 230027, Anhui, China
| | - Gang Zhao
- Center for Biomedical Engineering, Department of Electronic Science and Technology, University of Science and Technology of China, Hefei 230027, Anhui, China
- Anhui Provincial Engineering Research Center for Biopreservation and Artificial Organs, Hefei 230027, Anhui, China
| | - Fazil Panhwar
- Center for Biomedical Engineering, Department of Electronic Science and Technology, University of Science and Technology of China, Hefei 230027, Anhui, China
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