IGFBP5 Boost Counteracts Dental Stem Cell Aging in Periodontitis Model
Researchers observed that IGFBP5 levels fall in dental follicle stem cells that become senescent. Increasing IGFBP5 reduced senescence and improved osteogenic capacity, apparently through non-canonical Wnt signaling and the downstream factor WNT5B. The team also created a nanoparticle-containing hydrogel to deliver modified stem cells and reported better periodontal regeneration in a rat model of periodontitis.
Dental follicle stem cells are promising for rebuilding periodontal tissue, but their therapeutic use is limited when they become senescent in culture. Here, IGFBP5 was lower in cells made senescent by repeated division or hydrogen peroxide. Raising IGFBP5 reduced senescence and improved bone-forming capacity, with non-canonical Wnt signaling and WNT5B implicated downstream.
The team then created a nanoparticle-containing hydrogel to deliver modified stem cells overexpressing IGFBP5. In rats with periodontitis, this approach improved the cells' therapeutic effect and supported periodontal regeneration. The work offers an early proof of principle for countering age-related dental bone loss.
If validated beyond rats, this approach may eventually offer older adults with periodontitis a regenerative option that targets cellular aging, potentially complementing existing gum treatments. Dentists, researchers, and patients with age-related dental bone loss could be affected. However, clinical translation may take years, requiring safety and efficacy testing in humans. Access and cost could shape who benefits.