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Effects of moderate mechanical stimulation on disc repair and regeneration in vivo. (A) Gross observation of IVDs in the groups of sham, compression, release and traction. Magnetic resonance images (B), H&E and Safranin O (S.O.) staining (C) of IVDs from the groups as described above. (D) Immunohistochemical expression of Cav1, p-p65, COX-2 and Collagen I in IVDs from the groups as described above. Negative control was shown in Figure S4. N = 3.
