Tissue-Level Mechanosensitivity: Predicting and Controlling the Orientation of 3D Vascular Networks

Shira Landau, Avraham Moriel, Ariel Livne, Ming H. Zheng, Eran Bouchbinder, Shulamit Levenberg

פרסום מחקרי: פרסום בכתב עתמאמרביקורת עמיתים

תקציר

Understanding the mechanosensitivity of tissues is a fundamentally important problem having far-reaching implications for tissue engineering. Here we study vascular networks formed by a coculture of fibroblasts and endothelial cells embedded in three-dimensional biomaterials experiencing external, physiologically relevant forces. We show that cyclic stretching of the biomaterial orients the newly formed network perpendicular to the stretching direction, independent of the geometric aspect ratio of the biomaterials sample. A two-dimensional theory explains this observation in terms of the networks stored elastic energy if the cell-embedded biomaterial features a vanishing effective Poissons ratio, which we directly verify. We further show that under a static stretch, vascular networks orient parallel to the stretching direction due to force-induced anisotropy of the biomaterial polymer network. Finally, static stretching followed by cyclic stretching reveals a competition between the two mechanosensitive mechanisms. These results demonstrate tissue-level mechanosensitivity and constitute an important step toward developing enhanced tissue repair capabilities using well-oriented vascular networks.

שפה מקוריתאנגלית
עמודים (מ-עד)7698-7708
מספר עמודים11
כתב עתNano Letters
כרך18
מספר גיליון12
מזהי עצם דיגיטלי (DOIs)
סטטוס פרסוםפורסם - 12 דצמ׳ 2018

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