In VitroMolecular hydrogen suppresses Porphyromonas gingivalis lipopolysaccharide‑induced increases in interleukin‑1 alpha and interleukin‑6 secretion in human gingival cellsMHID-1605109PMID: 345336462022Molecular and Cellular BiochemistryYasukazu Saitoh, Nene Yonekura, Daigo Matsuoka, Akira MatsumotoPeriodontitis is defined as a multifactorial polymicrobial infection accompanied by inflammatory reactions. Porphyromonas gingivalis (Pg) is known as a major pathogen in the initiation and progression of periodontitis, and a major virulence factor is Pg lipopolysaccharide (LPS). Molecular hydrogen (H2) has been reported to act as a gaseous antioxidant, which suppresses periodontitis progression by