Jianfeng Chen, Han Liu, Chuan Li, Xiaoxiao Chen, Yichuan Dai
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引用次数: 0
Abstract
In recent years, the microfluidic squeezing method for cell intracellular delivery has demonstrated high efficiency and generalizability. This approach, however, still faces difficulties in effectively transfecting large molecules. Integration of this method with other membrane disruption strategies can enhance intracellular delivery efficiency and cell viability. Notably, the combination of microchannel squeezing and electric fields emerges as the most crucial strategy. The cell membrane is rapidly perforated in a microfluidic device, and then an electric field is introduced to further improve the permeability of the plasma membrane, allowing transmembrane transit of impermeable molecules. Nevertheless, the underlying mechanism of the combined squeezing and electroporation method on cell membrane destabilization and material transport remains unclear. Thus, this paper aims to develop a computational model to investigate the intracellular delivery process influenced by various external stimuli and to examine the implications of mixing external stimuli as well as the distinct effects of electric and squeezing on intracellular delivery. Meanwhile, we modified the squeezing parameters (microchannel size and cell velocity) and the electric field parameters (pulse length, electric field strength, etc.) to optimize the cell’s absorption of foreign substances. The simulation results indicate that a decrease in the contraction width, an increase in the contraction length, and an increase in the average cell velocity could promote the squeezing deformation of the cell as well as the formation of pores on the cell membrane. And the joint action of cell squeezing and electric field enhances cellular absorption of substances. In addition, the change of electrical parameters also affects the results of cell squeezing in conjunction with the electric field. For example, the increased length of electric field pulses improves the cell membrane permeability. However, the electric field intensity must be set in a reasonable range (< several kV/cm) to prevent cell inactivation.
期刊介绍:
Microfluidics and Nanofluidics is an international peer-reviewed journal that aims to publish papers in all aspects of microfluidics, nanofluidics and lab-on-a-chip science and technology. The objectives of the journal are to (1) provide an overview of the current state of the research and development in microfluidics, nanofluidics and lab-on-a-chip devices, (2) improve the fundamental understanding of microfluidic and nanofluidic phenomena, and (3) discuss applications of microfluidics, nanofluidics and lab-on-a-chip devices. Topics covered in this journal include:
1.000 Fundamental principles of micro- and nanoscale phenomena like,
flow, mass transport and reactions
3.000 Theoretical models and numerical simulation with experimental and/or analytical proof
4.000 Novel measurement & characterization technologies
5.000 Devices (actuators and sensors)
6.000 New unit-operations for dedicated microfluidic platforms
7.000 Lab-on-a-Chip applications
8.000 Microfabrication technologies and materials
Please note, Microfluidics and Nanofluidics does not publish manuscripts studying pure microscale heat transfer since there are many journals that cover this field of research (Journal of Heat Transfer, Journal of Heat and Mass Transfer, Journal of Heat and Fluid Flow, etc.).