Both LFA-1-ICAM-1 and Mac-1-ICAM-1 interactions modulate the adhesion between leukocyte and endothelium under blood flow in inflammation cascade, while they play distinct roles with the former involving in slow rolling and firm adhesion and the latter mediating the crawling, and the corresponding molecular mechanism remains unclear. The scientific issue of this project focuses on investigating the molecular mechanism for elucidating the different function between LFA-1 and Mac-1. With the combination of biomechanical technology and molecular dynamics simulations, the scientific aims include: 1) Quantify the impact of external force on the binding kinetics of LFA-1-ICAM-1 and Mac-1-ICAM-1 interactions; 2) Predict the dynamic features of micro-structures of LFA-1 and Mac-1. Upon the research approach of simulation predicting experiment and experiment approving simulation, the goal of this project is to deepen the understanding of structure-function relationship of LFA-1 and Mac-1, and to offer new insight into drug design.
β2整合素亚家族成员LFA-1、Mac-1与配体ICAM-1相互作用虽然均介导炎症级联反应中血流剪切条件下白细胞与血管内皮细胞之间的粘附过程,但是二者却发挥不同生物学功能,前者主要介导慢速滚动与稳定粘附,而后者主要介导爬行。其相应作用机制尚不明确。本项目围绕LFA-1、Mac-1功能差异的分子作用机制这一科学问题,结合生物力学与分子动力学模拟手段,开展以下研究:1)定量比较力学因素对LFA-1-ICAM-1、Mac-1-ICAM-1相互作用反应动力学的调控规律;2)模拟预测LFA-1、Mac-1微观结构动力学差异性。采用模拟预测、实验定量测量以及验证模拟的研究思路为深入认识LFA-1、Mac-1的结构-功能关系提供基础数据,并为未来药物设计提供新线索。
β2 整合素亚家族成员LFA-1、Mac-1 与配体ICAM-1 相互作用虽然均介导炎症级联反应中血流剪切条件下白细胞与血管内皮细胞之间的粘附过程,但是二者却发挥不同生物学功能,前者主要介导慢速滚动与稳定粘附,而后者主要介导爬行。其相应作用机制尚不明确。本项目围绕LFA-1、Mac-1 功能差异的分子作用机制这一科学问题,结合生物力学与分子动力学模拟手段,开展了以下研究:1)定量比较了力学因素对LFA-1-ICAM-1、Mac-1-ICAM-1相互作用反应动力学的调控规律;2)考察了LFA-1、Mac-1 α亚基I domain稳定性差异的结构基础;β2 整合素内、外配体结合对其变构动力学的各自贡献;以及β2整合素典型变构过程(站立、腿部分开及内配体结合)的微观结构动力学特征;3)在CR结构域调控选择素变构动力学及关键氨基酸位点调控内向整流型钾离子通道动力学的结构基础方面进行了拓展研究。项目顺利完成预定目标,项目标注SCI论文3篇,其他SCI论文1篇,正在整理2篇,参编著作章节1章,协助指导博士生1名。
{{i.achievement_title}}
数据更新时间:2023-05-31
Efficient photocatalytic degradation of organic dyes and reaction mechanism with Ag2CO3/Bi2O2CO3 photocatalyst under visible light irradiation
基于一维TiO2纳米管阵列薄膜的β伏特效应研究
Empagliflozin, a sodium glucose cotransporter-2 inhibitor, ameliorates peritoneal fibrosis via suppressing TGF-β/Smad signaling
An alternative conformation of human TrpRS suggests a role of zinc in activating non-enzymatic function
Baicalin provides neuroprotection in traumatic brain injury mice model through Akt/Nrf2 pathway
力调节的白细胞上整合素LFA-1与ICAM-1的相互作用
选择素介导的整合素LFA-1活化的力学调控机制
整合素Mac-1介导巨噬细胞融合的分子机制研究
泛素蛋白超家族的进化分类、功能预测与实验验证