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Effects of Shh-knockdown on BMSCs exosome-inhibited apoptosis in spinal cord tissues of SCI rats. Representative images of TUNEL staining in sham and SCI rats at 28 days post-operation. Scale bars = 100 μm. Quantification of TUNEL-positive cells. N = 5/group. ∗∗P < 0.01 versus sham group. #P < 0.05 versus SCI group. &P < 0.05 versus as indicated.
