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- W2014263111 abstract "Remodeling of collagen fibrils is involved in a variety of physiological and pathological processes including development, tissue repair, and metastasis. Fibroblast-populated collagen gel contraction has been employed as a model system to investigate the collagen fibril remodeling within three-dimensional collagen matrices. Research on collagen gel contraction is also important for understanding the mechanism underlying connective tissue repair, and for design considerations for engineered tissues in regenerative medicine. Second harmonic generation (SHG) is a non-linier optical effect by which well-ordered protein assemblies, including collagen fibrils, can be visualized without any labeling, and used for a noninvasive imaging of collagen fibrils in the skin. Here we demonstrate that the remodeling of collagen fibrils in the fibroblast-populated collagen gel can be analyzed by SHG imaging with a multiphoton microscope. Two models of collagen gel contraction (freely versus restrained contraction) were prepared, and orientation of fibroblasts, density, diameter, and distribution of collagen fibrils were examined by multiphoton fluorescent and SHG microscopy. Three-dimensional construction images revealed vertical and horizontal orientation of fibroblasts in freely and restrained gel contraction, respectively. Quantitative analysis indicated that collagen fibrils were accumulated within the gel and assembled into the thicker bundles in freely but not restrained collagen gel contraction. We also found that actomyosin contractility was involved in collagen fibril remodeling. This study elucidates how collagen fibrils are remodeled by fibroblasts in collagen gel contraction, and also proves that SHG microscopy can be used for the investigation of the fibroblast-populated collagen gel." @default.
- W2014263111 created "2016-06-24" @default.
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- W2014263111 date "2013-01-01" @default.
- W2014263111 modified "2023-10-14" @default.
- W2014263111 title "Second Harmonic Generation Reveals Collagen Fibril Remodeling in Fibroblast-populated Collagen Gels" @default.
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- W2014263111 doi "https://doi.org/10.1247/csf.13017" @default.
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