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Interactions of periodontal pathogens with platelets in the gingival crevicular fluid of patients with periodontitis. 2022

Jie Zhang, and Wenjing Li, and Hongye Lu, and Ruifang Lu, and Yalin Zhan, and Huanxin Meng
Department of Periodontology, Peking University School and Hospital of Stomatology and National Center of Stomatology and National Clinical Research Center for Oral Diseases and National Engineering Research Center of Oral Biomaterials and Digital Medical Devices, Beijing, People's Republic of China.

To explore the immunological defensive effects of platelets on periodontal pathogens in the gingival crevicular fluid (GCF). GCF samples were collected from 20 patients with periodontitis and 10 healthy controls. Platelets in the GCF were detected by immunocytochemistry and immunofluorescence. Isolated platelets from healthy volunteers were co-cultured with Porphyromonas gingivalis (Pg) and Fusobacterium nucleatum (Fn). The interactions between platelets and periodontal pathogens were observed by transmission and scanning electron microscopy. The isolated platelets plus neutrophils were co-cultured with Pg or Fn, and the formation of neutrophil extracellular traps (NETs) was evaluated by staining with Sytox Green. The platelet level in the GCF was higher in patients with periodontitis than in healthy controls. Platelets interacted with bacteria and neutrophils in the GCF. In vitro, platelets recruited and engulfed periodontal pathogens. In response to periodontal pathogens, neutrophils released web chromatin, and platelets promoted the formation of intensive NETs. Platelets, migrating to the gingival sulcus, may exert direct antibacterial effects or assist neutrophils.

UI MeSH Term Description Entries
D010518 Periodontitis Inflammation and loss of connective tissues supporting or surrounding the teeth. This may involve any part of the PERIODONTIUM. Periodontitis is currently classified by disease progression (CHRONIC PERIODONTITIS; AGGRESSIVE PERIODONTITIS) instead of age of onset. (From 1999 International Workshop for a Classification of Periodontal Diseases and Conditions, American Academy of Periodontology) Pericementitis,Pericementitides,Periodontitides
D001792 Blood Platelets Non-nucleated disk-shaped cells formed in the megakaryocyte and found in the blood of all mammals. They are mainly involved in blood coagulation. Platelets,Thrombocytes,Blood Platelet,Platelet,Platelet, Blood,Platelets, Blood,Thrombocyte
D005883 Gingival Crevicular Fluid A fluid occurring in minute amounts in the gingival crevice, believed by some authorities to be an inflammatory exudate and by others to cleanse material from the crevice, containing sticky plasma proteins which improve adhesions of the epithelial attachment, have antimicrobial properties, and exert antibody activity. (From Jablonski, Illustrated Dictionary of Dentistry, 1982) Gingival Exudate,Crevicular Fluid, Gingival,Crevicular Fluids, Gingival,Exudate, Gingival,Exudates, Gingival,Fluid, Gingival Crevicular,Fluids, Gingival Crevicular,Gingival Crevicular Fluids,Gingival Exudates
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D016966 Porphyromonas gingivalis A species of gram-negative, anaerobic, rod-shaped bacteria originally classified within the BACTEROIDES genus. This bacterium produces a cell-bound, oxygen-sensitive collagenase and is isolated from the human mouth. Bacteroides gingivalis
D016967 Fusobacterium nucleatum A species of gram-negative, anaerobic, rod-shaped bacteria isolated from the gingival margin and sulcus and from infections of the upper respiratory tract and pleural cavity.

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