PMID- 28661054 OWN - NLM STAT- MEDLINE DCOM- 20180706 LR - 20211204 IS - 1097-4644 (Electronic) IS - 0730-2312 (Print) IS - 0730-2312 (Linking) VI - 119 IP - 1 DP - 2018 Jan TI - Platelet-derived growth factor regulates YAP transcriptional activity via Src family kinase dependent tyrosine phosphorylation. PG - 824-836 LID - 10.1002/jcb.26246 [doi] AB - The Hippo pathway effector YAP is implicated in the pathogenesis of cholangiocarcinoma (CCA). The Hippo pathway relies on signaling cross talk for its regulation. Given the importance of platelet derived growth factor receptor (PDGFR) signaling in CCA biology, our aim was to examine potential YAP regulation by PDGFR. We employed human and mouse CCA specimens and cell lines for these studies. Initially, we confirmed upregulation of PDGFRbeta and PDGFR ligands in human and mouse CCA specimens and cell lines. YAP, a transcriptional co-activator, was localized to the nucleus in human CCA specimens and a cell line, as well as patient derived xenografts (PDX). PDGFR pharmacologic inhibition led to a redistribution of YAP from the nucleus to cytosol and downregulation of YAP target genes in a human CCA cell line. siRNA silencing of PDGFR-beta similarly downregulated YAP target genes. YAP activation (nuclear localization and target gene expression) was regulated by Src family kinases (SFKs) downstream of PDGFR. SFK activity resulted in phosphorylation of YAP on tyrosine(357) (YAP(Y357) ). The importance of YAP(Y357) phosphorylation in regulating YAP activation was confirmed utilizing the SB-1 cell line, a mouse cell line expressing YAP S127A precluding canonical serine phosphorylation. PDGFR inhibition decreased cellular abundance of the survival protein Mcl-1, a known YAP target gene, and accordingly increased cell death in CCA cells in vitro and in vivo. These preclinical data demonstrate that a PDGFR-SFK cascade regulates YAP activation via tyrosine phosphorylation in CCA. Inhibiting this cascade may provide a viable therapeutic strategy for this human malignancy. CI - (c) 2017 Wiley Periodicals, Inc. FAU - Smoot, Rory L AU - Smoot RL AUID- ORCID: 0000-0001-8543-661X AD - Department of Surgery, Mayo Clinic College of Medicine and Science, Rochester, Minnesota. FAU - Werneburg, Nathan W AU - Werneburg NW AD - Division of Gastroenterology and Hepatology, Mayo Clinic College of Medicine and Science, Rochester, Minnesota. FAU - Sugihara, Takaaki AU - Sugihara T AD - Division of Gastroenterology and Hepatology, Mayo Clinic College of Medicine and Science, Rochester, Minnesota. FAU - Hernandez, Matthew C AU - Hernandez MC AD - Department of Surgery, Mayo Clinic College of Medicine and Science, Rochester, Minnesota. FAU - Yang, Lin AU - Yang L AD - Center for Individualized Medicine, Mayo Clinic College of Medicine and Science, Rochester, Minnesota. FAU - Mehner, Christine AU - Mehner C AD - Department of Biochemistry and Molecular Biology, Mayo Clinic Graduate School of Biomedical Sciences, Jacksonville, Florida. FAU - Graham, Rondell P AU - Graham RP AD - Department of Laboratory Medicine and Pathology, Mayo Clinic College of Medicine and Science, Rochester, Minnesota. FAU - Bronk, Steven F AU - Bronk SF AD - Division of Gastroenterology and Hepatology, Mayo Clinic College of Medicine and Science, Rochester, Minnesota. FAU - Truty, Mark J AU - Truty MJ AD - Department of Surgery, Mayo Clinic College of Medicine and Science, Rochester, Minnesota. FAU - Gores, Gregory J AU - Gores GJ AD - Division of Gastroenterology and Hepatology, Mayo Clinic College of Medicine and Science, Rochester, Minnesota. LA - eng GR - P30 DK084567/DK/NIDDK NIH HHS/United States GR - R01 DK059427/DK/NIDDK NIH HHS/United States PT - Journal Article DEP - 20170803 PL - United States TA - J Cell Biochem JT - Journal of cellular biochemistry JID - 8205768 RN - 0 (Adaptor Proteins, Signal Transducing) RN - 0 (Phosphoproteins) RN - 0 (Platelet-Derived Growth Factor) RN - 0 (Transcription Factors) RN - 0 (YAP-Signaling Proteins) RN - 0 (YAP1 protein, human) RN - EC 2.7.10.1 (PDGFRB protein, human) RN - EC 2.7.10.1 (Receptor, Platelet-Derived Growth Factor beta) SB - IM MH - Adaptor Proteins, Signal Transducing/*metabolism MH - Animals MH - Bile Duct Neoplasms/genetics/*metabolism MH - Cell Line, Tumor MH - Cell Nucleus/genetics/metabolism MH - Cholangiocarcinoma/genetics/*metabolism MH - Gene Expression Regulation, Neoplastic MH - Humans MH - Mice MH - Neoplasm Transplantation MH - Phosphoproteins/*metabolism MH - Phosphorylation MH - Platelet-Derived Growth Factor/*metabolism MH - Receptor, Platelet-Derived Growth Factor beta/*metabolism MH - Signal Transduction MH - Transcription Factors MH - *Transcription, Genetic MH - Up-Regulation MH - YAP-Signaling Proteins PMC - PMC5705491 MID - NIHMS897457 OTO - NOTNLM OT - Hippo OT - Src kinase family OT - cholangiocarcinoma OT - platelet derived growth factor EDAT- 2017/07/01 06:00 MHDA- 2018/07/07 06:00 PMCR- 2019/01/01 CRDT- 2017/06/30 06:00 PHST- 2017/05/19 00:00 [received] PHST- 2017/06/26 00:00 [accepted] PHST- 2017/07/01 06:00 [pubmed] PHST- 2018/07/07 06:00 [medline] PHST- 2017/06/30 06:00 [entrez] PHST- 2019/01/01 00:00 [pmc-release] AID - 10.1002/jcb.26246 [doi] PST - ppublish SO - J Cell Biochem. 2018 Jan;119(1):824-836. doi: 10.1002/jcb.26246. Epub 2017 Aug 3.