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Micrographs from gingivitis (A,C) and periodontitis (B,D) gingival tissue samples. Immunostaining of citrullinated histone H3 (A,B) and MPO (C,D) are shown. Although citrullinated histone H3 expression did not differ between gingivitis and periodontitis (A,B), a higher MPO expression in gingivitis compared to periodontitis was found. This suggested that NET formation might be more associated with gingivitis. Scale bar, 50 µm.
