School of Chemical Engineering and Translational Nanobioscience Research Center, Sungkyunkwan University, Suwon 16419, Republic of Korea.
Department of Chemistry, Gettysburg College, Gettysburg, Pennsylvania 17325, United States.
Langmuir. 2024 Mar 26;40(12):6524-6536. doi: 10.1021/acs.langmuir.4c00174. Epub 2024 Mar 13.
Triton X-100 (TX-100) is a membrane-disrupting detergent that is widely used to inactivate membrane-enveloped viral pathogens, yet is being phased out due to environmental safety concerns. Intense efforts are underway to discover regulatory acceptable detergents to replace TX-100, but there is scarce mechanistic understanding about how these other detergents disrupt phospholipid membranes and hence which ones are suitable to replace TX-100 from a biophysical interaction perspective. Herein, using the quartz crystal microbalance-dissipation (QCM-D) and electrochemical impedance spectroscopy (EIS) techniques in combination with supported lipid membrane platforms, we characterized the membrane-disruptive properties of a panel of TX-100 replacement candidates with varying antiviral activities and identified two distinct classes of membrane-interacting detergents with different critical micelle concentration (CMC) dependencies and biophysical mechanisms. While all tested detergents formed micelles, only a subset of the detergents caused CMC-dependent membrane solubilization similarly to that of TX-100, whereas other detergents adsorbed irreversibly to lipid membrane interfaces in a CMC-independent manner. We compared these biophysical results to virus inactivation data, which led us to identify that certain membrane-interaction profiles contribute to greater antiviral activity and such insights can help with the discovery and validation of antiviral detergents to replace TX-100.
曲拉通 X-100(TX-100)是一种膜破坏型清洁剂,广泛用于灭活有包膜的病毒病原体,但由于对环境安全的担忧,正逐步被淘汰。目前正在积极努力寻找监管部门可接受的清洁剂来替代 TX-100,但对于这些其他清洁剂如何破坏磷脂膜,以及从生物物理相互作用的角度来看,哪些清洁剂适合替代 TX-100,人们知之甚少。在此,我们使用石英晶体微天平耗散(QCM-D)和电化学阻抗谱(EIS)技术结合脂质体支持膜平台,对具有不同抗病毒活性的一系列 TX-100 替代候选物的膜破坏特性进行了表征,并确定了两类具有不同临界胶束浓度(CMC)依赖性和不同生物物理机制的膜相互作用清洁剂。虽然所有测试的清洁剂都形成胶束,但只有一部分清洁剂会导致与 TX-100 相似的 CMC 依赖性膜溶解,而其他清洁剂则以 CMC 独立的方式不可逆地吸附到脂质膜界面。我们将这些生物物理结果与病毒失活动力学数据进行了比较,这使我们认识到某些膜相互作用特征有助于提高抗病毒活性,并且这些见解有助于发现和验证替代 TX-100 的抗病毒清洁剂。