Ac-AEDG-NH₂ in Human Gingival Mesenchymal Stem Cells
A 2020 peer-reviewed study published in Molecules (Khavinson et al.) demonstrated that AEDG produced significant reductions in cellular senescence markers p16 and p21 in human gingival mesenchymal stem cells (hGMSCs). The findings provide direct mechanistic evidence for AEDG's role in restoring proliferative capacity in oral stem cells — the cells responsible for gingival tissue self-renewal.
Study design
The Khavinson 2020 study isolated human gingival mesenchymal stem cells from healthy donor tissue and exposed them to AEDG at physiological concentrations across replicative passages. Cellular senescence markers p16 (CDKN2A) and p21 (CDKN1A) were quantified alongside proliferative capacity assays.
Quantified senescence reduction
AEDG exposure produced a 1.92-fold reduction in p16 expression and a 2.44-fold reduction in p21 expression, both at the p<0.01 significance threshold. p16 and p21 are the canonical cell-cycle inhibitors that drive replicative senescence — their reduction restores the proliferative competence of the stem cell population.
Why hGMSCs matter for periodontal health
Gingival mesenchymal stem cells maintain the self-renewal capacity of gingival connective tissue across the lifespan. Their senescence is implicated in age-related gingival recession, impaired wound healing after periodontal procedures, and reduced response to non-surgical therapy. Restoring proliferative capacity at the stem cell level addresses a layer of periodontal aging that mechanical therapy cannot reach.
OptiOral Care Ac-AEDG-NH₂ analog
The native AEDG peptide is rapidly cleaved by salivary proteases, limiting therapeutic exposure in oral applications. The Ac-AEDG-NH₂ analog used in OptiOral Care formulations carries N-terminal acetylation and C-terminal amidation, blocking the proteolytic attack points at both termini and extending active compound half-life from minutes to hours in the oral environment.
Citations
- Khavinson VKh, Sevostianova NN, Linkova NS, et al. Peptidergic regulation of cell proliferation and apoptosis in human gingival mesenchymal stem cells. Molecules. 2020;25(3):609. [link]
- Pickart L, Margolina A. Regenerative and protective actions of the GHK-Cu peptide. Int J Mol Sci. 2018;19(7):1987. [link]