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Expression levels of TNF-α and MMP-3 in the periodontal tissue in the diabetes + β-anhydroicaritin group. TNF-α was marginally positively expressed in (A) the gingival epithelial layer and (B) fibroblasts. MMP-3 was marginally positively expressed in (C) the gingival epithelial layer and (D) fibroblasts. Magnification, ×400. TNF, tumor necrosis factor; MMP, matrix metalloproteinase.
