The results of this study suggest that thrombin-induced CCN2 expression may occur through PAR1, reactive oxygen species, ASK1, and JNK signaling in HGFs. Curcumin could effectively inhibit CCN2 expression through JNK suppression. These signaling events are important for wound healing and fibrosis. Additional research, including animal studies, is required to confirm the inhibiting role of curcumin in the development of gingival overgrowth.
LPA produced at the surgical wound may contribute to the recurrence of GO by upregulating CCN2 expression in human GFs. This effect was mediated by Smad3 and JNK activation and ALK5 transactivation. EGCG could be a useful agent for reducing the recurrence of GO after surgery through suppression of JNK and Smad3 activations.
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