W83 Traffics Via ICAM1 in Microvascular Endothelial Cells and Alters Capillary Organization
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Microvascular dysfunction is a feature of periodontal disease. , one of the most common oral bacteria present in gingival tissue biofilms, has also been identified in the gingival capillaries of patients with chronic periodontitis. We sought to determine the effect of W83 infection on microvascular endothelium and . Interdental papillae of rats with -induced alveolar bone loss had a more dilated and denser subepithelial capillary network than uninfected controls. W83 was detected in the epithelial layers, the subepithelial connective tissue matrix, and subgingival capillaries. invaded human dermal microvascular endothelial cells (HD-MVECS) and persisted up termination (24 h). Colocalization analysis at 2.5, 6, and 24 h post-inoculation showed that 79-88% of internalized bacteria were in ICAM-1 positive endosomes, and 10-39% were in Rab5, Rab7, or LAMP1 positive compartments, but never in autophagosomes. Antibody-based blockade of ICAM-1 significantly reduced W83 invasion in HD-MVECS. infected HD-MVECS were unable to form vascular networks in Matrigel. perturbs microvascular endothelial function and invasion of these cells via ICAM-1 may be important for microbial persistence within tissues.
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