Raval Jeel, Gongadze Ekaterina, Benčina Metka, Junkar Ita, Rawat Niharika, Mesarec Luka, Kralj-Iglič Veronika, Góźdź Wojciech, Iglič Aleš
Group of Physical Chemistry of Complex Systems, Institute of Physical Chemistry, Polish Academy of Sciences, 01-224 Warsaw, Poland.
Laboratory of Physics, Faculty of Electrical Engineering, University of Ljubljana, 1000 Ljubljana, Slovenia.
Membranes (Basel). 2021 Jul 14;11(7):533. doi: 10.3390/membranes11070533.
In this review paper, we theoretically explain the origin of electrostatic interactions between lipid bilayers and charged solid surfaces using a statistical mechanics approach, where the orientational degree of freedom of lipid head groups and the orientational ordering of the water dipoles are considered. Within the modified Langevin Poisson-Boltzmann model of an electric double layer, we derived an analytical expression for the osmotic pressure between the planar zwitterionic lipid bilayer and charged solid planar surface. We also show that the electrostatic interaction between the zwitterionic lipid head groups of the proximal leaflet and the negatively charged solid surface is accompanied with a more perpendicular average orientation of the lipid head-groups. We further highlight the important role of the surfaces' nanostructured topography in their interactions with biological material. As an example of nanostructured surfaces, we describe the synthesis of TiO nanotubular and octahedral surfaces by using the electrochemical anodization method and hydrothermal method, respectively. The physical and chemical properties of these nanostructured surfaces are described in order to elucidate the influence of the surface topography and other physical properties on the behavior of human cells adhered to TiO nanostructured surfaces. In the last part of the paper, we theoretically explain the interplay of elastic and adhesive contributions to the adsorption of lipid vesicles on the solid surfaces. We show the numerically predicted shapes of adhered lipid vesicles corresponding to the minimum of the membrane free energy to describe the influence of the vesicle size, bending modulus, and adhesion strength on the adhesion of lipid vesicles on solid charged surfaces.
在这篇综述论文中,我们使用统计力学方法从理论上解释了脂质双层与带电固体表面之间静电相互作用的起源,其中考虑了脂质头部基团的取向自由度和水偶极子的取向有序性。在双电层的修正朗之万-泊松-玻尔兹曼模型内,我们推导了平面两性离子脂质双层与带电固体平面表面之间渗透压的解析表达式。我们还表明,近端小叶的两性离子脂质头部基团与带负电的固体表面之间的静电相互作用伴随着脂质头部基团更垂直的平均取向。我们进一步强调了表面纳米结构形貌在其与生物材料相互作用中的重要作用。作为纳米结构表面的一个例子,我们分别描述了通过电化学阳极氧化法和水热法合成TiO纳米管表面和八面体表面。描述了这些纳米结构表面的物理和化学性质,以阐明表面形貌和其他物理性质对粘附在TiO纳米结构表面上的人类细胞行为的影响。在论文的最后部分,我们从理论上解释了弹性和粘附作用对脂质囊泡在固体表面吸附的相互作用。我们展示了对应于膜自由能最小值的数值预测的粘附脂质囊泡形状,以描述囊泡大小、弯曲模量和粘附强度对脂质囊泡在固体带电表面上粘附的影响。