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Histological and immunohistological analyses. (a) 8 weeks after surgery, the thinnest bands of scar tissue of H&E staining of sciatic nerve tissues and more regular bundles were demonstrated in animals treated with PLGA/EPO compared with saline, PLGA, and EPO treatment. (b) Immunostaining against PGP 9.5 showed that immunopositive nerve fibers or deeper stained fibers were obviously more in PLGA/EPO treated animals.
