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https://www.readbyqxmd.com/read/28634071/the-novel-yap-target-gene-sgk1-upregulates-taz-activity-by-blocking-gsk3%C3%AE-mediated-taz-destabilization
#1
Geon Yoo, Tackhoon Kim, Chaeuk Chung, Deog-Su Hwang, Dae-Sik Lim
YAP (Yes-associated protein) and TAZ (transcription activator with PDZ binding motif) are important in tissue regeneration and cancer development, highlighting the importance of discovering partners that regulate their oncogenicity. SGK1 (serum/glucocorticoid regulated kinase 1), initially identified as a homolog of Akt in phosphoinositide 3-kinase signaling, acts as a serine/threonine protein kinase in multiple oncogenic pathways. However, possible links between SGK1 and Hippo-YAP/TAZ signaling remain unexplored...
June 17, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28608501/targeting-hypoxia-mediated-yap1-nuclear-translocation-ameliorates-pathogenesis-of-endometriosis-without-compromising-maternal-fertility
#2
Shih-Chieh Lin, Hsiu-Chi Lee, Pei-Chi Hou, Jhao-Lin Fu, Meng-Hsing Wu, Shaw-Jenq Tsai
Endometriosis is a highly prevalent gynecological disease that severely reduces women's health and quality of life. Ectopic endometriotic lesions have evolved mechanisms to survive in the hypoxic peritoneal microenvironment by regulating the expression of a significant subset of genes. However, the master regulator controlling these genes remains to be characterized. Herein, by using bioinformatics analysis and experimental verification, we identified Yes-Associated Protein 1 (YAP1) as a master regulator of endometriosis...
June 12, 2017: Journal of Pathology
https://www.readbyqxmd.com/read/28589758/identification-of-type-i-and-type-ii-inhibitors-of-c-yes-kinase-using-in-silico-and-experimental-techniques
#3
Chandrasekaran Ramakrishnan, Anthony Mary Thangakani, Devadasan Velmurugan, Dhanabalan Anantha Krishnan, Masakazu Sekijima, Yutaka Akiyama, M Michael Gromiha
c-Yes kinase is considered as one of the attractive targets for anti-cancer drug design. The DFG (Asp-Phe-Gly) motif present in most of the kinases will adopt active and inactive conformations, known as DFG-in and DFG-out and their inhibitors are classified into type I and type II, respectively. In the present study, two screening protocols were followed for identification of c-Yes kinase inhibitors. (i) Structure-based virtual screening (SBVS) and (ii) Structure-based (SB) and Pharmacophore-based (PB) tandem screening...
June 7, 2017: Journal of Biomolecular Structure & Dynamics
https://www.readbyqxmd.com/read/28575156/consequences-of-endogenous-and-exogenous-wnt-signaling-for-development-in-the-preimplantation-bovine-embryo%C3%A2
#4
Paula Tribulo, Beatriz Caetano da Silva Leão, Khoboso C Lehloenya, Gisele Zoccal Mingoti, Peter J Hansen
Although WNT signaling regulates several developmental processes, its specific role during preimplantation development remains unclear. The present aim was to evaluate the consequences of activation and inhibition of β-catenin (CTNNB1) dependent and -independent WNT signaling in the bovine preimplantation embryo. Activation of CTNNB1 mediated WNT signaling by the agonist 2-amino-4-(3,4-(methylenedioxy)benzylamino)-6-(3-methoxyphenyl)pyrimidine (AMBMP) and a glycogen synthase kinase 3 (GSK3) inhibitor reduced development to the blastocyst stage...
May 30, 2017: Biology of Reproduction
https://www.readbyqxmd.com/read/28543074/wwc3-regulates-the-wnt-and-hippo-pathways-via-dvls-and-lats1-to-suppress-lung-cancer-invasion-and-metastasis
#5
Qiang Han, Xuyong Lin, Xiupeng Zhang, Guiyang Jiang, Yong Zhang, Yuan Miao, Xuezhu Rong, Xiaoying Zheng, Yong Han, Xu Han, Jingjing Wu, Joachim Kremerskothen, Enhua Wang
The scaffolding protein WWC (WW and C2-domain containing) family is known to regulate cell proliferation and organ size via the Hippo signalling pathway. However, the expression level of WWC3 in human tumours and the mechanisms underlying its role in cellular signal transduction have not yet been reported. Herein, we explored the potential roles of WWC3 in lung cancer cells and the corresponding molecular mechanisms. We found low WWC3 expression in both lung cancer cell lines and lung cancer specimens, which was associated with low differentiation, advanced p-TNM stage, positive lymph node metastasis, and poor prognosis in patients with lung cancer...
May 25, 2017: Journal of Pathology
https://www.readbyqxmd.com/read/28504812/overexpression-of-the-yap1-oncogene-in-clear-cell-renal-cell-carcinoma-is-associated-with-poor-outcome
#6
Agnieszka Rybarczyk, Jakub Klacz, Agata Wronska, Marcin Matuszewski, Zbigniew Kmiec, Piotr M Wierzbicki
Clear cell renal cell carcinoma (ccRCC) is the most common subtype of RCC (70-80%). Yes-associated protein 1 (YAP1) protein is a nuclear effector of the Hippo pathway and acts as a transcriptional co-activator of genes involved in the processes of growth and development of tissues. Hippo signaling, with its key kinases, MST2 and large tumor suppressor kinase 1 (LATS1), plays a significant role in the negative regulation of the amount and activity of YAP1 protein. Components of the Hippo pathway and YAP1 levels are frequently dysregulated in a variety of tumors, suggestive of their possible involvement in carcinogenesis...
May 15, 2017: Oncology Reports
https://www.readbyqxmd.com/read/28476896/altered-cargo-proteins-of-human-plasma-endothelial-cell-derived-exosomes-in-atherosclerotic-cerebrovascular-disease
#7
Edward J Goetzl, Janice B Schwartz, Maja Mustapic, Iryna V Lobach, Richard Daneman, Erin L Abner, Gregory A Jicha
Plasma endothelial cell-derived exosomes (EDEs) and platelet-derived exosomes (PDEs) were precipitated and enriched separately by immunospecific absorption procedures for analyses of cargo proteins relevant to atherosclerosis. EDEs had usual exosome size and marker protein content, and significantly higher levels than PDEs of the endothelial proteins vascular cell adhesion molecule-1 (VCAM-1) and endothelial nitric oxide synthase, whereas PDEs had significantly higher levels of platelet glycoprotein VI. EDE levels of VCAM-1, von Willebrand factor, platelet-derived growth factor (PDGF)-BB, angiopoietin-1, and lysyl oxidase-2 and the cerebrovascular-selective proteins glucose transporter 1, permeability-glycoprotein, and large neutral amino acid transporter 1 were significantly higher for 18 patients with cerebrovascular disease (CeVD) than for 18 age- and gender-matched control subjects...
May 5, 2017: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/28454447/inhibitory-effect-and-mechanism-of-exogenous-mammalian-sterile-20-like-kinase-1-on-the-growth-of-human-colorectal-cancer
#8
Jian Wu, Xiaohong Yang, Hongfei Lu, Liqiao Liu, Baohua Xu, Shuangyan Zheng, Bo Yu, Kemin Jie, Fusheng Wan
The present study aimed to observe the inhibitory effect and preliminary mechanism of exogenous mammalian sterile 20-like kinase 1 (MST1) on the growth of colorectal cancer SW480 cells. The SW480 cells were randomly divided into the following groups: Control, empty enhanced green fluorescent protein (EGFP) plasmid (pEGFP-N1), MST1 EGFP plasmid (pEGFP-MST1), 20 µmol/l fluorouracil (5-FU) and pEGFP-MST1 + 5-FU. An MTS colorimetric assay was used to detect cell viability, Hoechst 33342 staining was used to observe cell apoptosis, and western blotting and immunohistochemistry were used to detect the levels of the proteins MST1, yes-associated protein (YAP), phospho-YAP1 (Ser127), p53 and p53 upregulated modulator of apoptosis (PUMA)...
April 2017: Oncology Letters
https://www.readbyqxmd.com/read/28428044/transcriptional-co-activator-yap-regulates-camp-signaling-in-sertoli-cells
#9
Souvik Sen Sharma, Subeer S Majumdar
FSH mediated cyclic AMP (cAMP) signaling is crucial for function of testicular Sertoli cells (Sc) during puberty. Yes-kinase Associated Protein (YAP), a transcriptional co-activator, regulates cell proliferation and differentiation. However, its role in testicular function is not known. In present study, we have identified YAP as an important regulator of cAMP signaling in Sc, in-vitro. Verteporfin, a YAP-inhibitor, down regulated the expression of cAMP responsive genes necessary for spermatogenesis in Sc. Action of forskolin, which acts via cAMP, was also antagonized by verteporfin, limiting expression of these genes...
April 18, 2017: Molecular and Cellular Endocrinology
https://www.readbyqxmd.com/read/28427193/targeting-high-aurora-kinases-expression-as-an-innovative-therapy-for-hepatocellular-carcinoma
#10
Fuchen Liu, Guangyong Wang, Xiaoqiang Wang, Zhihui Che, Wei Dong, Xinggang Guo, Zhenguang Wang, Ping Chen, Daisen Hou, Qi Zhang, Wenli Zhang, Yida Pan, Dongqin Yang, Hui Liu
The Aurora kinases A and B control tumorigenesis by inhibiting apoptosis and promoting proliferation and metastasis, however, it remains unknown whether Aurora A and B overexpressed concomitantly and its clinical significance in hepatocellular carcinoma (HCC). Here, we obsearved Aurora A and B tended to overexpress parallelly on protein level (r = 0.8679, P < 0.0001) and their co-overexpression (Aurora AHBH), associated with the worst prognosis, was an independent predictor for the survival. Importantly, with the lower IC50 and stronger anti-tumor effect than selective inhibitors, SNS-314, the pan-inhibitor of Aurora kinases, which induced YAP (Yes-associated protein) reduction and resulted in P21 accumulation, significantly promoted the polyploidy (> 4N) formation and apoptosis in HCC...
April 25, 2017: Oncotarget
https://www.readbyqxmd.com/read/28376152/co-activation-of-stat3-and-yes-associated-protein-1-yap1-pathway-in-egfr-mutant-nsclc
#11
Imane Chaib, Niki Karachaliou, Sara Pilotto, Jordi Codony Servat, Xueting Cai, Xuefei Li, Ana Drozdowskyj, Carles Codony Servat, Jie Yang, Chunping Hu, Andres Felipe Cardona, Guillermo Lopez Vivanco, Alain Vergnenegre, Jose Miguel Sanchez, Mariano Provencio, Noemi Reguart, Caicun Zhou, Peng Cao, Patrick C Ma, Trever G Bivona, Rafael Rosell
Background: The efficacy of epidermal growth factor receptor (EGFR) tyrosine kinase inhibitors (TKIs) in EGFR-mutant non-small cell lung cancer (NSCLC) is limited by adaptive activation of cell survival signals. We hypothesized that both signal transducer and activator of transcription 3 (STAT3) and Src-YES-associated protein 1 (YAP1) signaling are dually activated during EGFR TKI treatment to limit therapeutic response. Methods: We used MTT and clonogenic assays, immunoblotting, and quantitative polymerase chain reaction to evaluate the efficacy of EGFR TKI alone and in combination with STAT3 and Src inhibition in three EGFR-mutant NSCLC cell lines...
September 1, 2017: Journal of the National Cancer Institute
https://www.readbyqxmd.com/read/28366538/morin-impedes-yap-nuclear-translocation-and-fosters-apoptosis-through-suppression-of-wnt-%C3%AE-catenin-and-nf-%C3%AE%C2%BAb-signaling-in-mst1-overexpressed-hepg2-cells
#12
NaveenKumar Perumal, MadanKumar Perumal, Anbarasu Kannan, Kumar Subramani, Devaraj Halagowder, NiranjaliDevaraj Sivasithamparam
Recent clinical and experimental evidences strongly acclaim Yes-associated protein (Yap), a key oncogenic driver in liver carcinogenesis, as a therapeutic target. Of the known multiple schemes to inhibit Yap activity, activation of Mammalian Sterile 20-like Kinase 1 (Mst1), an upstream regulator of Yap, appears to be a promising one. In this study, we hypothesize that morin, a bioflavonoid, mediates its anti-cancer effect through the activation of Mst1/hippo signaling in liver cancer cells. To test this hypothesis, both full length Mst1 (F-Mst1) and kinase active N-terminal Mst1 (N-Mst1)-overexpressed HepG2 cells were used...
March 31, 2017: Experimental Cell Research
https://www.readbyqxmd.com/read/28360038/insulin-receptor-and-gpcr-crosstalk-stimulates-yap-via-pi3k-and-pkd-in-pancreatic-cancer-cells
#13
Fang Hao, Qinhong Xu, Yinglan Zhao, Jan V Stevens, Steven H Young, James Sinnett-Smith, Enrique Rozengurt
We examined the impact of crosstalk between the insulin receptor and G protein-coupled receptor (GPCR) signaling pathways on the regulation of Yes-associated protein (YAP) localization, phosphorylation, and transcriptional activity in the context of human pancreatic ductal adenocarcinoma (PDAC). Stimulation of PANC-1 or MiaPaCa-2 cells with insulin and neurotensin, a potent mitogenic combination of agonists for these cells, promoted striking YAP nuclear localization and decreased YAP phosphorylation at Ser(127) and Ser(397) Challenging PDAC cells with either insulin or neurotensin alone modestly induced the expression of YAP/TEAD-regulated genes, including connective tissue growth factor (CTGF), cysteine-rich angiogenic inducer 61 (CYR61), and CXCL5, whereas the combination of neurotensin and insulin induced a marked increase in the level of expression of these genes...
March 30, 2017: Molecular Cancer Research: MCR
https://www.readbyqxmd.com/read/28359287/activity-of-the-novel-bcr-kinase-inhibitor-iqs019-in-preclinical-models-of-b-cell-non-hodgkin-lymphoma
#14
P Balsas, A Esteve-Arenys, J Roldán, L Jiménez, V Rodríguez, J G Valero, A Chamorro-Jorganes, R Puig de la Bellacasa, J Teixidó, A Matas-Céspedes, A Moros, A Martínez, E Campo, A Sáez-Borderías, J I Borrell, P Pérez-Galán, D Colomer, G Roué
BACKGROUND: Pharmacological inhibition of B cell receptor (BCR) signaling has recently emerged as an effective approach in a wide range of B lymphoid neoplasms. However, despite promising clinical activity of the first Bruton's kinase (Btk) and spleen tyrosine kinase (Syk) inhibitors, a small fraction of patients tend to develop progressive disease after initial response to these agents. METHODS: We evaluated the antitumor activity of IQS019, a new BCR kinase inhibitor with increased affinity for Btk, Syk, and Lck/Yes novel tyrosine kinase (Lyn), in a set of 34 B lymphoid cell lines and primary cultures, including samples with acquired resistance to the first-in-class Btk inhibitor ibrutinib...
March 31, 2017: Journal of Hematology & Oncology
https://www.readbyqxmd.com/read/28356344/yap-promotes-myogenic-differentiation-via-the-mek5-erk5-pathway
#15
Ting-Huan Chen, Chen-Yu Chen, Hui-Chin Wen, Chia-Chu Chang, Horng-Dar Wang, Chih-Pin Chuu, Chung-Ho Chang
Yes-associated protein (YAP) is a transcriptional coactivator in the Hippo pathway that regulates cell proliferation, differentiation, and apoptosis. The MEK5/ERK5 MAPK cascade is essential for the early step of myogenesis. In this study, we generated C2C12 stable cell lines that expressed YAP (C2C12-YAP cells) and found that ERK5 and MEK5 were activated in C2C12-YAP cells compared with control C2C12 (C2C12-vector) cells. C2C12-YAP stable cells also differentiated into myotubes better than C2C12-vector cells, and expressed elevated levels of myogenin, a transcription factor that regulates myogenesis, as well as elevated levels of myosin heavy chain, a skeletal muscle marker...
March 29, 2017: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/28347651/selective-targeting-of-sh2-domain-phosphotyrosine-interactions-of-src-family-tyrosine-kinases-with-monobodies
#16
Tim Kükenshöner, Nadine Eliane Schmit, Emilie Bouda, Fern Sha, Florence Pojer, Akiko Koide, Markus Seeliger, Shohei Koide, Oliver Hantschel
The binding of Src-homology 2 (SH2) domains to phosphotyrosine (pY) sites is critical for the autoinhibition and substrate recognition of the eight Src family kinases (SFKs). The high sequence conservation of the 120 human SH2 domains poses a significant challenge to selectively perturb the interactions of even the SFK SH2 family against the rest of the SH2 domains. We have developed synthetic binding proteins, termed monobodies, for six of the SFK SH2 domains with nanomolar affinity. Most of these monobodies competed with pY ligand binding and showed strong selectivity for either the SrcA (Yes, Src, Fyn, Fgr) or SrcB subgroup (Lck, Lyn, Blk, Hck)...
May 5, 2017: Journal of Molecular Biology
https://www.readbyqxmd.com/read/28343945/as-human-lung-microvascular-endothelia-achieve-confluence-src-family-kinases-are-activated-and-tyrosine-phosphorylated-p120-catenin-physically-couples-neu1-sialidase-to-cd31
#17
Sang W Hyun, Anguo Liu, Zhenguo Liu, Erik P Lillehoj, Joseph A Madri, Albert B Reynolds, Simeon E Goldblum
In postconfluent human pulmonary microvascular endothelial cell (HPMEC)s, NEU1 sialidase associates with and desialylates the src family kinase (SFK) substrate, CD31, and disrupts angiogenesis. We asked whether the NEU1-CD31 interaction might be SFK-driven. We found that normalized phospho-SFK (PY416) signal is increased in postconfluent HPMECs compared to subconfluent cells and prior SFK inhibition with PP2 or SU6656 completely blocked NEU1 association with and desialylation of CD31. Prior silencing of each of the four SFKs expressed in HPMECs, as well as CD31, dramatically reduced confluence-induced SFK activation...
March 24, 2017: Cellular Signalling
https://www.readbyqxmd.com/read/28340249/orthodontic-strain-affects-the-hippo-pathway-effector-yap-concomitant-with-proliferation-in-human-periodontal-ligament-fibroblasts
#18
Diana Huelter-Hassler, Pascal Tomakidi, Thorsten Steinberg, Britta A Jung
Objectives: During orthodontic tooth movement (OTM), human periodontal ligament fibroblasts (hPDLFs) sense, and respond to mechanical forces. Since the molecular constituents involved in these processes are not fully elucidated, the objective of the present study was to identify further key molecules of the cellular strain response. Materials and Methods: Primary hPDLFs were strained with a static equiaxial strain of 2.5 per cent for 15 minutes, 1 hour, 6 hours, and 24 hours...
March 17, 2017: European Journal of Orthodontics
https://www.readbyqxmd.com/read/28315328/tead4-yap-interaction-regulates-tumoral-growth-by-controlling-cell-cycle-arrest-at-the-g1-phase
#19
Shin Takeuchi, Atsushi Kasamatsu, Masanobu Yamatoji, Dai Nakashima, Yosuke Endo-Sakamoto, Nao Koide, Toshikazu Takahara, Toshihiro Shimizu, Manabu Iyoda, Katsunori Ogawara, Masashi Shiiba, Hideki Tanzawa, Katsuhiro Uzawa
TEA domain transcription factor 4 (TEAD4), which has critical functions in the process of embryonic development, is expressed in various cancers. However, the important role of TEAD4 in human oral squamous cell carcinomas (OSCCs) remain unclear. Here we investigated the TEAD4 expression level and the functional mechanism in OSCC using quantitative reverse transcriptase-polymerase chain reaction, Western blot analysis, and immunohistochemistry. Furthermore, TEAD4 knockdown model was used to evaluate cellular proliferation, cell-cycle analysis, and the interaction between TEAD4 and Yes-associated protein (YAP) which was reported to be a transcription coactivator of cellular proliferation...
April 29, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28279717/yap-and-wwtr1-new-targets-for-skin-cancer-treatment
#20
Thomas Andl, Linli Zhou, Kun Yang, Ana Luisa Kadekaro, Yuhang Zhang
The core components of the Hippo signaling pathway are a cascade of kinases that govern the phosphorylation of downstream transcriptional co-activators, namely, YES-associated protein (YAP) and WW domain-containing transcription regulator protein 1 (WWTR1, also known as TAZ). The Hippo signaling pathway is considered an important tumor-suppressor pathway, and its dysregulation has been noted in a variety of human cancers, in which YAP/WWTR1 enable cancerous cells to overcome contact inhibition, and to grow and spread uncontrollably...
March 7, 2017: Cancer Letters
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