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- W2009740187 abstract "Inflammatory periodontal diseases constitute one of the most common infections in humans, resulting in the destruction of the supporting structures of the dentition. Circulating neutrophils are an essential component of the human innate immune system. We observed that mice deficient for the major lysosomal-associated membrane protein-2 (LAMP-2) developed severe periodontitis early in life. This development was accompanied by a massive accumulation of bacterial plaque along the tooth surfaces, gingival inflammation, alveolar bone resorption, loss of connective tissue fiber attachment, apical migration of junctional epithelium, and pathological movement of the molars. The inflammatory lesions were dominated by polymorphonuclear leukocytes (PMNs) apparently being unable to efficiently clear bacterial pathogens. Systemic treatment of LAMP-2-deficient mice with antibiotics prevented the periodontal pathology. Isolated PMNs from LAMP-2-deficient mice showed an accumulation of autophagic vacuoles and a reduced bacterial killing capacity. Oxidative burst response was not altered in these cells. Latex bead and bacterial feeding experiments showed a reduced ability of the phagosomes to acquire an acidic pH and late endocytic markers, suggesting an impaired fusion of late endosomes-lysosomes with phagosomes. This study underlines the importance of LAMP-2 for the maturation of phagosomes in PMNs. It also underscores the requirement of lysosomal fusion events to provide sufficient antimicrobial activity in PMNs, which is needed to prevent periodontal disease." @default.
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- W2009740187 date "1946-04-01" @default.
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- W2009740187 title "The Incidence of Siderosis in Iron Turners and Grinders" @default.
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- W2009740187 doi "https://doi.org/10.1136/oem.3.2.78" @default.
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