首页    期刊浏览 2025年07月23日 星期三
登录注册

文章基本信息

  • 标题:Cryoprotectant-free cryopreservation of mammalian cells by superflash freezing
  • 本地全文:下载
  • 作者:Yoshitake Akiyama ; Masato Shinose ; Hiroki Watanabe
  • 期刊名称:Proceedings of the National Academy of Sciences
  • 印刷版ISSN:0027-8424
  • 电子版ISSN:1091-6490
  • 出版年度:2019
  • 卷号:116
  • 期号:16
  • 页码:7738-7743
  • DOI:10.1073/pnas.1808645116
  • 出版社:The National Academy of Sciences of the United States of America
  • 摘要:Cryopreservation is widely used to maintain backups of cells as it enables the semipermanent storage of cells. During the freezing process, ice crystals that are generated inside and outside the cells can lethally damage the cells. All conventional cryopreservation methods use at least one cryoprotective agent (CPA) to render water inside and outside the cells vitreous or nanocrystallized (near-vitrification) without forming damaging ice crystals. However, CPAs should ideally be avoided due to their cytotoxicity and potential side effects on the cellular state. Herein, we demonstrate the CPA-free cryopreservation of mammalian cells by ultrarapid cooling using inkjet cell printing, which we named superflash freezing (SFF). The SFF cooling rate, which was estimated by a heat-transfer stimulation, is sufficient to nearly vitrify the cells. The experimental results of Raman spectroscopy measurements, and observations with an ultrahigh-speed video camera support the near-vitrification of the droplets under these conditions. Initially, the practical utility of SFF was demonstrated on mouse fibroblast 3T3 cells, and the results were comparable to conventional CPA-assisted methods. Then, the general viability of this method was confirmed on mouse myoblast C2C12 cells and rat primary mesenchymal stem cells. In their entirety, the thus-obtained results unequivocally demonstrate that CPA-free cell cryopreservation is possible by SFF. Such a CPA-free cryopreservation method should be ideally suited for most cells and circumvent the problems typically associated with the addition of CPAs.
  • 关键词:cryopreservation ; superflash freezing ; cryoprotectant agent-free ; inkjet cell printing ; vitrification
国家哲学社会科学文献中心版权所有