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Extracellular Vesicles Derived From Lipopolysaccharide-Challenged Gingival Fibroblast Reveal Distinct miRNA
Daniel Diehl1,2, Charlotte Lauren Brauer1,2, Hagen S Bachmann2
1Department of Periodontology, School of Dentistry, Faculty of Health, Witten/Herdecke University, Witten, Germany.
Clinical and Experimental Dental Research
|February 19, 2025
Summary
Lipopolysaccharide (LPS) stimulation of gingival fibroblasts alters extracellular vesicle (EV) miRNA cargo, promoting inflammation and cancer progression. These periodontal EVs may link oral health to systemic diseases, highlighting their diagnostic and therapeutic potential.
Area of Science:
- Oral Biology
- Molecular Biology
- Cancer Research
Background:
- Periodontitis is a common inflammatory disease with known systemic links.
- Extracellular vesicles (EVs) are crucial for cell-to-cell communication and may mediate periodontitis's systemic effects.
- The molecular contents of EVs from inflamed periodontal tissues are not well understood.
Purpose of the Study:
- To investigate the EV cargo of human gingival fibroblasts (hGF-hTERT) after lipopolysaccharide (LPS) stimulation.
- To explore the role of these EVs in cancer progression.
Main Methods:
- EVs were isolated from LPS-treated and untreated fibroblasts.
- EVs were characterized using dynamic light scattering and scanning electron microscopy.
- RNA sequencing identified differentially expressed miRNAs, with validation by qPCR.
- Functional pathway enrichment and in-silico analyses (TCGA) assessed miRNA impact on tumorigenesis.
Main Results:
- LPS stimulation did not alter EV size or concentration but increased miRNA content by 2.6-fold.
- Three miRNAs (miR-146a-5p, miR-486-5p, miR-451a) were significantly upregulated.
- LPS-derived EVs enhanced prostate cancer cell proliferation and were linked to poor cancer prognosis via TCGA analysis.
Conclusions:
- LPS stimulation modifies gingival fibroblast EV miRNA cargo, activating inflammation and cancer pathways.
- Periodontal EVs may play a mechanistic role in systemic disease development.
- Further research is needed to explore the diagnostic and therapeutic applications of these EVs.
