The study on the competitive mechanism between cell osmotic damage and mechanical damage under controlled curve freezing
摘要
The advancement of cell cryopreservation technology in the field of cryobiology has significantly propelled the progress of numerous biomedical applications, including organ preservation and biological database establishment. Currently, the underlying mechanism of intracellular damage remains unproven, and the precise factors contributing to osmotic and mechanical damage in low-temperature injury remain unclear. Particularly when subjected to varying freezing curves, the impact of protective agent concentration on cellular activity and intracellular water orientation remained inconclusive. The precise control of temperature is crucial for regulating the biological freezing process, including nucleation, which holds great potential for advancing cryogenic preservation in the field of biology. The establishment of a thermodynamic analysis model for cell freezing was undertaken to investigate the optimal cell freezing curve in this paper. The optimal combination of freezing parameters, such as temperature and protectant concentration, was investigated in various cell protection processes to address the limitations associated with the commonly employed constant freezing rate in existing studies. The optimal strategy for curve freezing was obtained to provide precise guidance for cell cryopreservation. By leveraging microfluidic technology, an efficient paradigm for cell cryopreservation process can be established. The findings demonstrated that precise regulation of the freezing curve could significantly enhance the efficacy and functionality of cellular preservation. Experimental data from existing literature have confirmed important parameters in thermodynamic and kinetic models, including nucleation rate and ice crystal size. This study enhances our comprehension of the nanosecond field of cell freezing.