Summary
Published in Journal of Periodontal Research (2019), this peer-reviewed study used 3D Petri Dish® micro-molds to form scaffold-free 3D microtissues. Full citation: Janjić, Klara, et al. Angiopoietin‐like 4 production upon treatment with hypoxia and L‐mimosine in periodontal fibroblasts
Angiopoietin‐like 4 production upon treatment with hypoxia and L‐mimosine in periodontal fibroblasts
Research Overview
Angiopoietin-like 4 modulates both angiogenesis and bone resorption, yet its role in periodontal tissue was unknown. Here, human periodontal ligament fibroblasts in monolayer and spheroid culture were exposed to hypoxia or L-mimosine, with angiopoietin-like 4 measured by qPCR and ELISA; bacterial lipopolysaccharides and inflammatory cytokines (IL-1β, TNFα) were tested alongside.
Western blotting for HIF-1 and echinomycin inhibitor experiments assessed dependence on hypoxia-inducible factor activity, defining how hypoxic signaling drives angiopoietin-like 4 production in periodontal fibroblasts — a mechanism with implications for periodontal tissue remodeling and regeneration.
Key Discoveries
- Hypoxia and L-mimosine induced angiopoietin-like 4 in periodontal ligament fibroblasts
- Response characterized in both monolayer and spheroid culture formats
- HIF-1 dependence established through Western blot and echinomycin inhibition
