基质刚度调节细胞-细胞外基质间黏附对肿瘤细胞迁移影响的模型研究

目的研究细胞外基质(extracellular matrix,ECM)刚度对细胞和ECM间黏附及肿瘤迁移的影响。方法建立基于网状波茨模型(cellular Potts model,CPM),模拟肿瘤细胞生长与细胞间免疫反馈过程,观察细胞力学行为改变对细胞-ECM黏附的影响状况,分析不同ECM下肿瘤细胞迁移的变化。结果 ECM刚度变化会影响肿瘤细胞的迁移速度。ECM刚度改变调节细胞与ECM的黏附力,黏附力改变影响细胞的迁移速度。结论细胞的迁移和分布模式与ECM黏附性以及刚度密切相关。基质刚度增加促进肿瘤细胞在较低刚度下迁移,而基质刚度进一步增加抑制肿瘤细胞迁移。研究结果可进一步揭示ECM动态变化、黏附大小及肿瘤细胞迁移的力学表现。

Influences of Cell-ECM Adhesion on Migration of Tumor Cells Regulated by ECM Stiffness: A Model Study

Objective To study the influence of cell-extracellular matrix (ECM) adhesion on migration of tumor cells regulated by ECM stiffness. Methods The cellular Potts model (CPM) was established to simulate tumor cell growth and cellular immune feedback system. The effects from mechanical behavior of cells on cell-ECM adhesion were observed, and the migration of tumor cells under different ECM was analyzed. Results The ECM stiffness could influence the migration rate of tumor cells. The change of ECM stiffness regulated the adhesion force between cells and ECM, and the change of adhesion force would influence the migration rate of cells. Conclusions The migration and distribution patterns of cells are closely related to the adhesion and stiffness of ECM. The increase in ECM stiffness can effectively promote the migration rate of tumor cells, and the further increase in ECM stiffness inhibits the migration of tumor cells. These findings may further reveal dynamic changes of ECM, adhesion and mechanical performance of tumor cell migration.