Study summary · research use only
Mechano-growth factor regulates periodontal ligament stem cell proliferation and differentiation through Fyn-RhoA-YAP signaling
Plain-language summary
Paraphrased from the published abstract below — not a verdict on whether anything works.
This in vitro study (species not specified) examined how mechano-growth factor (MGF) regulates proliferation and differentiation of periodontal ligament stem cells (PDLSCs) via Fyn-RhoA-YAP signaling. The authors report that MGF promoted PDLSCs proliferation and fibrogenic differentiation by inducing Fyn-p-YAPY357 phosphorylation but not LATS1-p-YAPS127 phosphorylation, and that Fyn activated YAP indirectly through RhoA rather than directly. Using kinase inhibitors to block Fyn phosphorylation, siRNA to downregulate YAP, and C3 to inhibit RhoA, the study found the Fyn-RhoA-p-YAPY357 pathway to be involved in MGF-driven PDLSCs proliferation and fibrogenic differentiation, which the authors describe as relevant to periodontal regenerative repair.
Abstract
Mechano-growth factor (MGF), which is a growth factor produced specifically in response to mechanical stimuli, with potential of tissue repair and regeneration. Our previous research has shown that MGF plays a crucial role in repair of damaged periodontal ligaments by promoting differentiation of periodontal ligament stem cells (PDLSCs). However, the molecular mechanism is not fully understood. This study aimed to investigated the regulatory effect of MGF on differentiation of PDLSCs and its molecular mechanism. Initially, we investigated how MGF impacts cell growth and differentiation, and the relationship with the activation of Fyn-p-YAPY357 and LATS1-p-YAPS127. Then, inhibitors were used to interfere Fyn phosphorylation to verify the role of Fyn-p-YAP Y357 signal after MGF stimulation; moreover, siRNA was used to downregulate YAP expression to clarify the function of YAP in PDLSCs proliferation and differentiation. Finally, after C3 was used to inhibit the RhoA expression, we explored the role of RhoA in the Fyn-p-YAP Y357 signaling pathway in PDLSCs proliferation and differentiation. Our study revealed that MGF plays a regulatory role in promoting PDLSCs proliferation and fibrogenic differentiation by inducing Fyn-YAPY357 phosphorylation but not LATS1-YAP S127 phosphorylation. Moreover, the results indicated that Fyn could not activate YAP directly but rather activated YAP through RhoA in response to MGF stimulation. The research findings indicated that the Fyn-RhoA-p-YAPY357 pathway is significant in facilitating the proliferation and fibrogenic differentiation of PDLSCs by MGF. Providing new ideas for the study of MGF in promoting periodontal regenerative repair.
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