PMID- 22993319 OWN - NLM STAT- MEDLINE DCOM- 20130104 LR - 20120920 IS - 1791-7530 (Electronic) IS - 0250-7005 (Linking) VI - 32 IP - 9 DP - 2012 Sep TI - Knockdown of receptor-interacting serine/threonine protein kinase-2 (RIPK2) affects EMT-associated gene expression in human hepatoma cells. PG - 3775-83 AB - BACKGROUND: Receptor-interacting serine/threonine protein kinase-2 (RIPK2) has been reported to be an important regulator of tumor proliferation, differentiation and wound repair. We investigated the effects of RIPK2 knockdown in human hepatoma cells on epithelial-to-mesenchymal transition (EMT)-associated gene expression. MATERIALS AND METHODS: HepG2 cells stably expressing RIPK2-shRNA (HepG2-shRIPK2) were generated after puromycin selection. Total RNAs from HepG2-shRIPK2 and from HepG2-shcontrol cells were isolated and PCR-based arrays were performed to compare the 84 EMT-associated gene expressions. RESULTS: We observed that knockdown of RIPK2 down-regulated mRNA expression of jagged 1 (JAG1); plasminogen activator inhibitor-1 (PAI1); regulator of G-protein signalling 2, 24 kDa (RGS2); E-cadherin (CDH1); fibroblast growth factor binding protein 1 (FGFBP1); snail homolog 2 (SNAI2); protein tyrosine phosphatase type IVA, member 1 (PTP4A1); keratin 19 (KRT19); vimentin (VIM); and survival of motor neuron protein-interacting protein 1 (SIP1). CONCLUSION: We found that knockdown of RIPK2 down-regulated nuclear factor kappa B (NF-kappaB)-dependent PAI1 and VIM gene expressions. RIPK2 might play an important role in hepatic cell migration. These findings could shed new light on carcinogenesis and on liver regeneration. FAU - Wu, Shuang AU - Wu S AD - Department of Medicine and Clinical Oncology, Chiba University, Graduate School of Medicine, Chuo-ku, Chiba, Japan. FAU - Kanda, Tatsuo AU - Kanda T FAU - Nakamoto, Shingo AU - Nakamoto S FAU - Imazeki, Fumio AU - Imazeki F FAU - Yokosuka, Osamu AU - Yokosuka O LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - Greece TA - Anticancer Res JT - Anticancer research JID - 8102988 RN - 0 (NF-kappa B) RN - 0 (RNA, Messenger) RN - EC 2.7.11.1 (RIPK2 protein, human) RN - EC 2.7.11.1 (Receptor-Interacting Protein Serine-Threonine Kinase 2) SB - IM MH - Carcinoma, Hepatocellular/enzymology/*genetics/pathology MH - Down-Regulation MH - Epithelial-Mesenchymal Transition/*genetics MH - *Gene Expression Regulation, Neoplastic MH - Gene Knockdown Techniques MH - Hep G2 Cells MH - Humans MH - Liver Neoplasms/enzymology/*genetics/pathology MH - NF-kappa B/genetics MH - RNA, Messenger/biosynthesis/genetics MH - Receptor-Interacting Protein Serine-Threonine Kinase 2/deficiency/*genetics/metabolism MH - Transfection MH - Up-Regulation EDAT- 2012/09/21 06:00 MHDA- 2013/01/05 06:00 CRDT- 2012/09/21 06:00 PHST- 2012/09/21 06:00 [entrez] PHST- 2012/09/21 06:00 [pubmed] PHST- 2013/01/05 06:00 [medline] AID - 32/9/3775 [pii] PST - ppublish SO - Anticancer Res. 2012 Sep;32(9):3775-83.