AI Insight
This study used molecular dynamics simulations to investigate how nanosecond pulsed electric fields cause electroporation in single versus double membrane structures, such as the plasma membrane and nuclear envelope. Researchers found that double membranes undergo faster electroporation due to counter-deformation between the two membrane layers, which reduces membrane tension and modulates the local electric field direction. This suggests that the nuclear envelope may be more vulnerable to damage from pulsed electric field ablation than the plasma membrane.
Why it matters
The findings could improve pulsed electric field ablation therapy for cancer treatment by helping researchers understand how electric pulses differentially affect cellular structures. This knowledge may enable more precise targeting strategies that maximize damage to cancer cell nuclei while potentially minimizing unwanted effects on surrounding tissues.
Understand the Science
by Yuepeng Diao, Ping Ye, Baolin Liu
Pulsed electric field ablation is an emerging non-thermal modality for tumor treatment, in which electroporation of both the plasma membrane and the nuclear envelope plays a critical role in inducing irreversible cellular damage. To elucidate the different effects of nanosecond pulsed electric fields (nsPEFs) on these membranes, we compared the electroporation responses of the single and double membranes under the same field strength employing molecular dynamics (MD) simulations. Our results demonstrate that the double membrane underwent faster electroporation, attributed to inter-membrane counter-deformation under Coulomb force, which modulated the local electric field direction and reduced membrane tension. Compared to the single membrane, the double membrane may be more susceptible to damage induced by nsPEFs. This finding may provide a molecular-scale theoretical reference for understanding the electroporation mechanism of the nuclear envelope relative to the plasma membrane under nsPEFs.
Source: Tension reduction from inter-membrane counter-deformation accelerates nuclear electroporation