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Representative micrographs of normal control and injured fetal and adult tendons three days post-injury (pi). Compared to the control tendons, we found an up-regulation of tenascin-C, versican, matrix metalloproteinase-2 (MMP2), MMP9, and tissue inhibitor of metalloproteinases-1 (TIMP1) within and around the lesion site in both age groups. Inserts show an overview at 10× magnification, scale bar = 100 µm.
