BACKGROUND INFORMATION: Human gingival tissues are prone to hyperplasia under inflammatory stimuli. We have identified gingival tissue-specific mesenchymal stem cells (GMSCs) and found their functional change being correlated with drug-induced gingival hyperplasia. However, whether these cells exhibit characteristics of pro-fibrotic phenotype under inflammatory condition remains unknown. RESULTS: GMSCs isolated from human normal gingival tissues (N-GMSC) and inflammatory gingival tissues (I-GMSC) were cultured in vitro, representative cytokines were added to simulate the in vivo inflammatory environment. Under the influence of the inflammatory cytokines, GMSCs exhibited higher rate of proliferation than those under normal condition, while their potential for osteogenic and adipogenic differentiation was suppressed. The expression of matrix metalloproteinases (MMP)-1, MMP-2, IL-1, IL-6, TNF-α and type 1 collagen was significantly higher in I-GMSCs than in N-GMSCs. Furthermore, compared with dental pulp stem cells, GMSCs showed different pattern of gene expression and extracellular matrix formation in inflammatory environment. CONCLUSIONS: Inflammatory microenvironment induces GMSCs to differentiate towards a pro-fibrotic phenotype, which could underlie the hyperplastic appearance of inflammatory gingiva.
BACKGROUND INFORMATION: Human gingival tissues are prone to hyperplasia under inflammatory stimuli. We have identified gingival tissue-specific mesenchymal stem cells (GMSCs) and found their functional change being correlated with drug-induced gingival hyperplasia. However, whether these cells exhibit characteristics of pro-fibrotic phenotype under inflammatory condition remains unknown. RESULTS: GMSCs isolated from human normal gingival tissues (N-GMSC) and inflammatory gingival tissues (I-GMSC) were cultured in vitro, representative cytokines were added to simulate the in vivo inflammatory environment. Under the influence of the inflammatory cytokines, GMSCs exhibited higher rate of proliferation than those under normal condition, while their potential for osteogenic and adipogenic differentiation was suppressed. The expression of matrix metalloproteinases (MMP)-1, MMP-2, IL-1, IL-6, TNF-α and type 1 collagen was significantly higher in I-GMSCs than in N-GMSCs. Furthermore, compared with dental pulp stem cells, GMSCs showed different pattern of gene expression and extracellular matrix formation in inflammatory environment. CONCLUSIONS: Inflammatory microenvironment induces GMSCs to differentiate towards a pro-fibrotic phenotype, which could underlie the hyperplastic appearance of inflammatory gingiva.
Authors: Marta Cristaldi; Rodolfo Mauceri; Giuseppina Campisi; Giuseppe Pizzo; Riccardo Alessandro; Laura Tomasello; Maria Pitrone; Giuseppe Pizzolanti; Carla Giordano Journal: Front Cell Dev Biol Date: 2020-05-21
Authors: Alice Blufstein; Christian Behm; Barbara Kubin; Johannes Gahn; Andreas Moritz; Xiaohui Rausch-Fan; Oleh Andrukhov Journal: Oral Dis Date: 2021-01-15 Impact factor: 4.068