Mudakannavar Sanyukta Prakash, Mitchell Matthew D, Rawle Robert J
Department of Chemistry, Williams College, MA, USA.
bioRxiv. 2025 Aug 18:2025.08.18.670922. doi: 10.1101/2025.08.18.670922.
Red blood cells (RBCs) are the most abundant human cell type and interface interactions with the RBC membrane are at the heart of many processes relevant for human health, such as immune system modulation, interactions with foreign pathogens and with pharmacological drugs. To better study such membrane interface interactions, it would be useful to employ surface-attached model lipid membranes derived from RBCs to enable surface-sensitive biophysical and biochemical measurements. Here, we present approaches to prepare two such types of RBC-derived model lipid membranes - supported lipid bilayers (RBC-SLBs) and tethered RBC liposomes. We present data characterizing and validating these model membranes, including assessing lipid mobility, the distribution and mobility of the glycophorin A membrane protein, the functionality of the acetylcholinesterase enzyme, and the utility of the RBC-SLBs as binding targets for viral pathogens. We anticipate that our results and methodologies will be of interest to researchers studying molecular interactions with RBC membranes, as well as those interested in the engineering of model membrane platforms derived from other physiological membranes.
红细胞(RBCs)是人体中数量最多的细胞类型,与红细胞膜的界面相互作用是许多与人类健康相关过程的核心,例如免疫系统调节、与外来病原体及药物的相互作用。为了更好地研究此类膜界面相互作用,利用源自红细胞的表面附着型模型脂质膜来进行表面敏感的生物物理和生化测量将很有帮助。在此,我们展示了制备两种此类源自红细胞的模型脂质膜的方法——支撑脂质双层(RBC-SLBs)和拴系红细胞脂质体。我们展示了表征和验证这些模型膜的数据,包括评估脂质流动性、血型糖蛋白A膜蛋白的分布和流动性、乙酰胆碱酯酶的功能,以及RBC-SLBs作为病毒病原体结合靶点的效用。我们预计,我们的结果和方法将引起研究与红细胞膜分子相互作用的研究人员以及对源自其他生理膜的模型膜平台工程感兴趣的人员的关注。