Sustained Strain Applied at High Rates Drives Dynamic Tensioning in Epithelial Cells.

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Tác giả: Guillaume Charras, Amir Monemian Esfahani, Changjin Huang, Alexandre Kabla, Nickolay V Lavrik, Grayson Minnick, Amir Ostadi Moghaddam, Jordan Rosenbohm, Bahareh Tajvidi Safa, Ruiguo Yang

Ngôn ngữ: eng

Ký hiệu phân loại: 181.4 *India

Thông tin xuất bản: United States : bioRxiv : the preprint server for biology , 2025

Mô tả vật lý:

Bộ sưu tập: NCBI

ID: 677383

Epithelial cells experience long lasting loads of different magnitudes and rates. How they adapt to these loads strongly impacts tissue health. Yet, much remains unknown about the evolution of cellular stress in response to sustained strain. Here, by subjecting cell pairs to sustained strain, we report a bimodal stress response, where in addition to the typically observed stress relaxation, a subset of cells exhibits a dynamic tensioning process with significant elevation in stress within 100s, resembling active pulling-back in muscle fibers. Strikingly, the fraction of cells exhibiting tensioning increases with increasing strain rate. The tensioning response is accompanied by actin remodeling, and perturbation to actin abrogates it, supporting cell contractility's role in the response. Collectively, our data show that epithelial cells adjust their tensional states over short timescales in a strain-rate dependent manner to adapt to sustained strains, demonstrating that the active pulling-back behavior could be a common protective mechanism against environmental stress.
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