A computational model for capturing the distinct in-and out-of-plane response of lipid membranes  

作　　者：Pinjing Wen Xi Wei Yuan Lin 

机构地区：[1]Institute of Semiconductor Manufacturing Research,Shenzhen University,Shenzhen,518060,China [2]College of Physics and Optoelectronic Engineering,Shenzhen University,Shenzhen,518060,China [3]Department of Mechanical Engineering,The University of Hong Kong,Hong Kong,SAR,China

出　　处：《Acta Mechanica Sinica》2021年第1期138-144,I0004,共8页力学学报（英文版）

基　　金：funded by the Research Grants Council of the Hong Kong Special Administration Region(Grants GRF/17257016 and GRF/17210618);the National Natural Science Foundation of China(Grant 11872325).

摘　　要：A computational framework was developed to capture the combined fluid-and solid-like behavior of lipid membranes in a unified manner.Specifically,the in-plane diffusion of lipid molecules and the associated evolution of membrane tension were explicitly taken into account in the model.In addition,the out-of-plane movement induced bending and shearing of membrane,along with its thermal undulations caused by bombardment of medium molecules,were also considered.The capability and validity of this approach were demonstrated by simulating the enforced deformation and shape fluctuations of a lipid vesicle under a variety of testing conditions as well as their comparison with corresponding theoretical predictions.Our model could serve a useful platform for investigating processes such as cell spreading and division where morphology evolution of the membrane and transport of lipids/transmembrane proteins are known to play key roles.

关 键 词：Cell membrane Thermal undulations Lipid diffusion Finite element method 

分 类 号：O57[理学—粒子物理与原子核物理]