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This study focuses on the regulatory role of geometric curvature in cellular mechanical transduction. By constructing a multi-axis curvature topological structure using super-soft hydrogels, it was confirmed that topological signals can independently regulate the adhesion and maturation of human mesenchymal stem cells, cytoskeleton reorganization, nuclear mechanical sensing, and osteogenic-related phenotypes. It elucidated the core mechanism of curvature-mediated cellular mechanical sensing and established that the topological structure is a key mechanical factor for regulating cell tension and fate.
01 Research Background
Geometric curvature is an important factor regulating cell behavior in the soft tissue microenvironment. However, due to the traditional research paradigm centered on stiffness, and the technical difficulties in constructing stable curvatures in ultra-soft material systems, the role of curvature in the cell mechanical transduction process has not been systematically explored.
02 Main Content
By employing the solvent-induced buckling strategy, a multi-axis curvature topology was constructed on the super-soft hydrogel to simulate the anisotropic topological characteristics of natural soft tissues. The regulatory effect of this topology on the mechanical response of human mesenchymal stem cells and osteogenic-related phenotypes was investigated. The intrinsic mechanism of curvature-mediated cell mechanical transduction was analyzed to achieve decoupling of topological mechanical signals from the substrate stiffness.
03 Research Design
Using a super soft hydrogel as the base, a multi-axis curvature structure was prepared through the solvent-induced buckling method, with a flat super soft base serving as the control group. In the two-dimensional topological surface and three-dimensional injectable microgel system, the mechanical behavior of stem cells and osteogenic-related phenotypes were observed. By combining mechanism experiments and energy minimization models, the regulatory laws of curvature on the arrangement of stress fibers and mechanical signal transmission were analyzed.
04 Results
The multi-axis curvature topology can induce the appearance of mature local adhesion, cytoskeleton reorganization and enhanced nuclear mechanical sensing in stem cells, thereby enhancing osteogenic-related phenotypes. This effect still exists in the three-dimensional microgel system. Curvature can independently drive cell mechanical transduction, achieving decoupling of topological signals from substrate stiffness. Curvature regulates the differential arrangement of stress fibers to enhance local adhesion contractility and reduce bending energy, completing mechanical signal transmission.
05 Extension of Thoughts
Provide a topologically-driven mechanical regulation direction for cell mechanobiology, offer a fundamental theoretical reference for the mechanical structure design of biomaterials and biological interfaces, and expand the research dimension of mechanical regulation of stem cell fate.
Original source:
1. Journal: ACS Nano
2. Publication date: February 24, 2026
3. DOI: 10.1021/acsnano.5c19367 4. Authors: Yong Hou, Xinhao Hu, Cheng Qian, Wenyan Xie, Linjie Ma, Luyao Zhang, Xiaomei Han, Youhua Tan, Yuan Lin, Chao Fang, Zhiqin Chu
