PMID- 18162703 OWN - NLM STAT- MEDLINE DCOM- 20080226 LR - 20220408 IS - 1011-8934 (Print) IS - 1598-6357 (Electronic) IS - 1011-8934 (Linking) VI - 22 IP - 6 DP - 2007 Dec TI - Mechanisms of epithelial-mesenchymal transition of peritoneal mesothelial cells during peritoneal dialysis. PG - 943-5 AB - A growing body of evidence indicates that epithelial-mesenchymal transition (EMT) of human peritoneal mesothelial cells (HPMC) may play an important role in the development and progression of peritoneal fibrosis during long-term peritoneal dialysis (PD) leading to failure of peritoneal membrane function. Here, we review our own observations and those of others on the mechanisms of EMT of HPMC and suggest potential therapeutic strategies to prevent EMT and peritoneal fibrosis during long-term PD. We found that high glucose and H2O2 as well as transforming growth factor-beta1 (TGF-beta1) induced EMT in HPMC and that high glucoseinduced EMT was blocked not only by inhibition of TGF-beta1 but also by antioxidants or inhibitors of mitogen-activated protein kinases (MAPK). Since MAPKs are downstream target molecules of reactive oxygen species (ROS), these data suggest that high glucose-induced generation of ROS and subsequent MAPK activation mediate high glucose-induced EMT in HPMC. We and others also observed that bone morphogenetic protein-7 (BMP-7) prevented EMT in HPMC. Glucose degradation products (GDP) were shown to play a role in inducing EMT. Involvement of a mammalian target of rapamycin (mTOR) in TGF-beta1-induced EMT has also been proposed in cultured HPMC. A better understanding of the precise mechanisms involved in EMT of HPMC may provide new therapeutic strategies for inhibiting peritoneal fibrosis in long-term PD patients. FAU - Lee, Hi Bahl AU - Lee HB AD - Hyonam Kidney Laboratory, Soon Chun Hyang University, Seoul, Korea. FAU - Ha, Hunjoo AU - Ha H LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Review PL - Korea (South) TA - J Korean Med Sci JT - Journal of Korean medical science JID - 8703518 SB - IM MH - Epithelial Cells/*pathology MH - Fibrosis MH - Humans MH - Mesoderm/*pathology MH - Peritoneal Dialysis/*adverse effects MH - Peritoneum/*pathology PMC - PMC2694643 EDAT- 2007/12/29 09:00 MHDA- 2008/02/27 09:00 PMCR- 2007/12/01 CRDT- 2007/12/29 09:00 PHST- 2007/12/29 09:00 [pubmed] PHST- 2008/02/27 09:00 [medline] PHST- 2007/12/29 09:00 [entrez] PHST- 2007/12/01 00:00 [pmc-release] AID - 200712943 [pii] AID - 10.3346/jkms.2007.22.6.943 [doi] PST - ppublish SO - J Korean Med Sci. 2007 Dec;22(6):943-5. doi: 10.3346/jkms.2007.22.6.943.