Biophysical Regulation of Cell Behavior-Cross Talk between Substrate Stiffness and Nanotopography

细胞外基质(ECM)的刚性和纳米拓扑结构影响生物体发育及生理和病理进程。因此,这些生物物理特征被用于调节细胞黏附、铺展至增殖、分化的各种细胞行为。描述细胞行为的生物物理调节对合理设计新型生物材料、植入物和医疗装置十分关键。已有学者就基质刚性和纳米拓扑结构特征对细胞行为的影响分别进行了综述,然而,刚性和纳米拓扑结构与细胞行为的交织影响尚未有人总结。此次,我们首次综述了基质刚性和纳米拓扑结构对细胞行为的影响,然后聚焦于生物物理信号从整合素到细胞核的细胞内传递,并试图将细胞行为的细胞外调节与基质的生物物理学特征联系在一起。最后,我们讨论了在剖析细胞行为的生物物理调节和将基质的刚性和纳米拓扑结构生物力学特性转化到组织工程和再生医学时存在的挑战。

The stiffness and nanotopographical characteristics of the extracellular matrix （ECM） influence numerous developmental, physiological, and pathological processes in vivo. These biophysical cues have therefore been applied to modulate almost all aspects of cell behavior, from cell adhesion and spreading to proliferation and differentiation. Delineation of the biophysical modulation of cell behavior is critical to the rational design of new biomaterials, implants, and medical devices. The effects of stiffness and topographical cues on cell behavior have previously been reviewed, respectively; however, the interwoven effects of stiffness and nanotopographical cues on cell behavior have not been well described, despite similarities in phenotypic manifestations. Herein, we first review the effects of substrate stiffness and nanotopography on cell behavior, and then focus on intracellular transmission of the biophysical signals from integrins to nucleus. Attempts are made to connect extracellular regulation of cell behavior with the biophysical cues. We then discuss the challenges in dissecting the biophysical regulation of cell behavior and in translating the mechanistic understanding of these cues to tissue engineering and regenerative medicine.