GLI1 and periodontitis: Moreover, studies have indicated that exosomes derived from periodontitis‐affected DPSCs enriched with miR‐378a increase endothelial cell angiogenesis by downregulating the expression of suppressor of fused homologue (Sufu) and activating the Hedgehog/glioma‐associated oncogene 1 (Gli1) signalling pathway (Zhou et al., 2021).