Print Email Facebook Twitter Oral polymorphonuclear neutrophil characteristics in relation to oral health: A cross-sectional, observational clinical study Title Oral polymorphonuclear neutrophil characteristics in relation to oral health: A cross-sectional, observational clinical study Author Rijkschroeff, P. Jansen, I.D.C. van der Weijden, F.A. Keijser, B.J.F. Loos, B.G. Nicu, E.A. Publication year 2016 Abstract Polymorphonuclear neutrophils (PMNs) have a major role in the innate immune system. However, little is known about PMN contribution in relation to oral health. The objective of this study was to investigate the numbers and functional characteristics of oral PMNs (oPMNs) compared with circulatory PMNs (cPMNs). Oral rinse and venous blood samples were obtained from 268 systemically and orally healthy volunteers in a cross-sectional observational study. PMN counts, cell cycle analysis and cellular activation state were investigated. Also, reactive oxygen species (ROS) production was analyzed, with and without bacterial stimulation (Fusobacterium nucleatum). In males, 1.2 × 10 6 ±1.0 × 10 6 oPMNs were collected, and showed a tendency to correlate with the levels of gingival bleeding (r=0.215, P=0.008). Comparable oPMNs counts were found among females (1.0 × 10 6 ±0.7 × 10 6). More late-stage apoptotic/necrotic cells were found among the oPMNs (53.1%) compared with the cPMNs (8.5%; P<0.001). Without additional stimulation, oPMNs were more activated than cPMNs, as indicated by higher expression of CD11b, CD63 and CD66b, and higher constitutive ROS levels (P<0.001). Notably, in response to bacterial stimulation, oPMNs released comparable ROS levels as cPMNs (P=0.042). In conclusion, this study provides data on viable oPMNs showing high levels of activation in orally and systemically healthy individuals, free of apparent caries lesions and periodontal disease. These data suggests that although the oPMNs are in a more mature stage of their life cycle compared with the cPMNs, oPMNs are still responsive to stimulation, which indicates their functional potential and possible contribution to a healthy oral ecosystem. Subject LifeMSB - Microbiology and Systems BiologyELSS - Earth, Life and Social SciencesBiomedical InnovationBiologyHealthy LivingMesenchymal stem cellMulti-differentiationMyoblastOral mucosaThree-dimensional culture To reference this document use: http://resolver.tudelft.nl/uuid:7dc1e701-0d72-439f-be81-642c6f6f6bf7 DOI https://doi.org/10.1038/ijos.2016.23 TNO identifier 572897 ISSN 1674-2818 Source International Journal of Oral Science, 8 (3), 191-198 Document type article Files To receive the publication files, please send an e-mail request to TNO Library.