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J Dent Res. 2016 Nov;95(12):1415-1424. doi: 10.1177/0022034516659642. Epub 2016 Jul 28.

PIN1 Suppresses the Hepatic Differentiation of Pulp Stem Cells via Wnt3a.

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1 Department of Oral Physiology, BK21 PLUS Project, and Institute of Translational Dental Sciences, School of Dentistry, Pusan National University, Yangsan, Republic of Korea.
2 Department of Oral and Maxillofacial Pathology, Research Center for Tooth and Periodontal Regeneration, and School of Dentistry, Kyung Hee University, Seoul, Republic of Korea.


This study aimed to investigate the role of PIN1 on the hepatic differentiation of human dental pulp stem cells (hDPSCs) and its signaling pathway, as well as the potential therapeutic effects of hDPSC transplantation and PIN1 inhibition on CCl4 (carbon tetrachloride)-induced liver fibrosis in mice. The in vitro results showed that hepatic differentiation was suppressed by infection with adenovirus-PIN1 and promoted by PIN1 inhibitor juglone via the downregulation of Wnt3a and β-catenin. Compared with treatment with either hDPSC transplantation or juglone alone, the combination of hDPSCs and juglone into CCl4-injured mice significantly suppressed liver fibrosis and restored serum levels of alanine transaminase, aspartate transaminase, and ammonia. Collectively, the present study shows for the first time that PIN1 inhibition promotes hepatic differentiation of hDPSCs through the Wnt/β-catenin pathway. Furthermore, juglone in combination with hDPSC transplantation effectively treats liver fibrosis, suggesting that hDPSC transplantation with PIN1 inhibition may be a novel therapeutic candidate for the treatment of liver injury.


NIMA-interacting peptidylprolyl isomerase; Wnt3a; dental pulp; differentiation; hepatocytes; liver fibrosis

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