ArticleInfection and immunity2014
Aggregatibacter actinomycetemcomitans outer membrane vesicles are internalized in human host cells and trigger NOD1- and NOD2-dependent NF-κB activation.
Article in Infection and immunity, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 87 papers.
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Who cites it
87 citing papers in PubMed, 138 citations in OpenAlex.
- Article
- Comparative characterization reveals conserved and divergent ecological traits of oral corynebacteria.Microbiology spectrum · 2026Article
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- Fimbriae potentiateCurrent research in microbial sciences · 2026Review
- The role ofJournal of oral microbiology · 2026Review
- Differential Proteomic Analysis of Extracellular Vesicles Produced byDentistry journal · 2025Article
- Reprogramming tumor-associated macrophages and blocking PD-L1 via engineered outer membrane vesicles to enhance T cell infiltration and cytotoxic functions.Journal of nanobiotechnology · 2025Article
- Article
- Pattern Recognition by NOD-Like Receptors.Advances in experimental medicine and biology · 2025Review
- The role of bacterial outer membrane vesicles in inflammatory response of acute-on-chronic liver failure.Frontiers in microbiology · 2025Review
- Outer Membrane Vesicles Derived from Oral Bacteria Act as a Dagger in Host Immunity: Insight Tips from Local Diseases to Systemic Effects.International journal of biological sciences · 2025Review
- Outer Membrane Vesicles Derived From Fusobacterium nucleatum Trigger Periodontitis Through Host Overimmunity.Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2024Article
- The two coin sides of bacterial extracellular membrane nanovesicles: atherosclerosis trigger or remedy.Discover nano · 2024Review
- Microbiota-Derived Extracellular Vesicle as Emerging Actors in Host Interactions.International journal of molecular sciences · 2024Review
- Do Bacterial Outer Membrane Vesicles Contribute to Chronic Inflammation in Parkinson's Disease?Journal of Parkinson's disease · 2024Review
- Bacteria-derived extracellular vesicles: endogenous roles, therapeutic potentials and their biomimetics for the treatment and prevention of sepsis.Frontiers in immunology · 2024Review
- Review
- Cargo exchange between human and bacterial extracellular vesicles in gestational tissues: a new paradigm in communication and immune development.Extracellular vesicles and circulating nucleic acids · 2024Review
- Harnessing Bacterial Extracellular Vesicle Immune Effects for Cancer Therapy.Pathogens & immunity · 2024Review
- Characterization of the Inflammatory Response Evoked by Bacterial Membrane Vesicles in Intestinal Cells Reveals an RIPK2-Dependent Activation by Enterotoxigenic Escherichia coli Vesicles.Microbiology spectrum · 2023Article
27 more citing papers are in PubMed but not listed here.
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Authors and funding
5 authors at 2 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Aggregatibacter actinomycetemcomitans is an oral and systemic pathogen associated with aggressive forms of periodontitis and with endocarditis. We recently demonstrated that outer membrane vesicles (OMVs) disseminated by A. actinomycetemcomitans could deliver multiple proteins, including biologically active cytolethal distending toxin (CDT), into the cytosol of HeLa cells and human gingival fibroblasts (HGF). In the present work, we have used immunoelectron and confocal microscopy analysis and fluorescently labeled vesicles to further investigate mechanisms for A. actinomycetemcomitans OMV-mediated delivery of bacterial antigens to these host cells. Our results supported that OMVs were internalized into the perinuclear region of HeLa cells and HGF. Colocalization analysis revealed that internalized OMVs colocalized with the endoplasmic reticulum and carried antigens, detected using an antibody specific to whole A. actinomycetemcomitans serotype a cells. Consistent with OMV internalization mediating intracellular antigen exposure, the vesicles acted as strong inducers of cytoplasmic peptidoglycan sensor NOD1- and NOD2-dependent NF-κB activation in human embryonic kidney cells. Moreover, NOD1 was the main sensor of OMV-delivered peptidoglycan in myeloid THP1 cells, contributing to the overall inflammatory responses induced by the vesicles. This work reveals a role of A. actinomycetemcomitans OMVs as a trigger of innate immunity via carriage of NOD1- and NOD2-active pathogen-associated molecular patterns (PAMPs).
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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.