Mapping Small Extracellular Vesicle Secretion Potential in Healthy Human Gingiva Using Spatial Transcriptomics

Area of Science:

• Regenerative Medicine
• Molecular Biology
• Genomics

Background:

• Small extracellular vesicles (sEVs) are crucial for regeneration, with oral mucosal tissues showing remarkable healing capabilities.
• Understanding sEV biogenesis in oral tissues is key to advancing regenerative therapies.

Purpose of the Study:

• To spatially map gene expression in gingiva tissue using transcriptomics.
• To identify genes and cellular locations involved in small extracellular vesicle (sEV) biogenesis within the gingiva.
• To provide novel insights into the molecular mechanisms of oral tissue regeneration.

Main Methods:

• Utilized spatial transcriptomics on gingiva tissue sections.
• Performed Gene Ontology (GO) analysis to identify enriched pathways.
• Analyzed expression of 12 selected sEV biogenesis-related genes.

Main Results:

• Identified epithelial and lamina propria regions, with specific niches like the sulcular epithelium showing high sEV-related GO process enrichment.
• Discovered MUC1, SDCBP2, and VPS37B exhibit high specificity and expression in the superficial sulcular epithelium.
• Confirmed expression of known sEV markers (e.g., CD9, CD63) but noted their lack of specific localization to the sulcular epithelium.

Conclusions:

• This is the first meta-analysis of gingival transcriptomic data focused on sEV biogenesis.
• Findings reveal specific gingival structures and potential novel markers for sEV biogenesis.
• The study offers foundational data for developing targeted regenerative strategies for oral tissues.