OMLP-PCs exert antibacterial effects through the secretion of soluble factors. Conditioned media (CM) derived from OMLP-PCs significantly reduced the growth of Gram-positive E. faecalis(A) and S. pyogenes
(B) and Gram-negative P. aeruginosa
(C) and P. mirabilis
(D) bacteria. CM from EFs had no significant effect on bacterial growth. Data are expressed as the percentage of growth ± SEM, with bacteria-only cultures set to 100%. ∗∗∗, p ≤ .001. Abbreviations: EFs, enriched fibroblasts; IFN-γ, interferon-γ; OMLP-PCs, oral mucosal lamina propria-progenitor cells.