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Serum inflammatory cytokine levels as assessed by ELISA. A: IL-2. B: IL-4. C: IL-10. D: TNF-α. E: IFN-γ. Note: BMSCs, bone marrow mesenchymal stem cells; NC, negative control; PS, protamine sulfate; ELISA, enzyme-linked immunosorbent assay; *P < 0.05 vs. normal group; #P < 0.05 vs. PS group.
