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https://www.readbyqxmd.com/read/29775782/network-based-expression-analyses-and-experimental-validations-revealed-high-co-expression-between-yap1-and-stem-cell-markers-compared-to-differentiated-cells
#1
Fariba Dehghanian, Zohreh Hojati, Fariba Esmaeili, Ali Masoudi-Nejad
The Hippo signaling pathway is identified as a potential regulatory pathway which plays critical roles in differentiation and stem cell self-renewal. Yap1 is a primary transcriptional effector of this pathway. The importance of Yap1 in embryonic stem cells (ESCs) and differentiation procedure remains a challenging question, since two different observations have been reported. To answer this question we used co-expression network and differential co-expression analyses followed by experimental validations. Our results indicate that Yap1 is highly co-expressed with stem cell markers in ESCs but not in differentiated cells (DCs)...
May 15, 2018: Genomics
https://www.readbyqxmd.com/read/29775224/circular-rnas-are-differentially-expressed-in-liver-ischemia-reperfusion-injury-model
#2
Zhiqiang Ye, Qinglei Kong, Jianhua Han, Jingyi Deng, Miaolue Wu, Hong Deng
Liver ischemia/reperfusion (I/R) injury has high mortality due to the intense inflammatory process occurs in the liver. However, the pathological mechanism underlying I/R injury is still not clear. Recent works showed that circular RNAs play critical roles in many human diseases. In this study, the occurrence of liver I/R injury was validated by an analysis of the blood samples and hematoxylin-eosin (HE) staining of liver tissues. Total RNA was purified and followed by RNA-seq in the purpose of screening the circRNAs in significant differentially expression, which were validated by quantitative PCR...
May 18, 2018: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/29773645/the-hippo-pathway-effector-wwtr1-regulates-cardiac-wall-maturation-in-zebrafish
#3
Jason K H Lai, Michelle M Collins, Veronica Uribe, Vanesa Jiménez-Amilburu, Stefan Günther, Hans-Martin Maischein, Didier Y R Stainier
Cardiac trabeculation is a highly regulated process that starts with the delamination of compact layer cardiomyocytes. The Hippo signaling pathway has been implicated in cardiac development but many questions remain. We have investigated the role of Wwtr1, a nuclear effector of the Hippo pathway, in zebrafish and find that its loss leads to reduced cardiac trabeculation. However, in mosaic animals, wwtr1-/- cardiomyocytes contribute more frequently than wwtr1+/- cardiomyocytes to the trabecular layer of wild-type hearts...
May 17, 2018: Development
https://www.readbyqxmd.com/read/29769538/organic-matter-loading-by-hippopotami-causes-subsidy-overload-resulting-in-downstream-hypoxia-and-fish-kills
#4
Christopher L Dutton, Amanda L Subalusky, Stephen K Hamilton, Emma J Rosi, David M Post
Organic matter and nutrient loading into aquatic ecosystems affects ecosystem structure and function and can result in eutrophication and hypoxia. Hypoxia is often attributed to anthropogenic pollution and is not common in unpolluted rivers. Here we show that organic matter loading from hippopotami causes the repeated occurrence of hypoxia in the Mara River, East Africa. We documented 49 high flow events over 3 years that caused dissolved oxygen decreases, including 13 events resulting in hypoxia, and 9 fish kills over 5 years...
May 16, 2018: Nature Communications
https://www.readbyqxmd.com/read/29768213/mirnas-that-induce-human-cardiomyocyte-proliferation-converge-on-the-hippo-pathway
#5
Marta Diez-Cuñado, Ke Wei, Paul J Bushway, Mano R Maurya, Ranjan Perera, Shankar Subramaniam, Pilar Ruiz-Lozano, Mark Mercola
Understanding the mechanisms that control human cardiomyocyte proliferation might be applicable to regenerative medicine. We screened a whole genome collection of human miRNAs, identifying 96 to be capable of increasing proliferation (DNA synthesis and cytokinesis) of human iPSC-derived cardiomyocytes. Chemical screening and computational approaches indicated that most of these miRNAs (67) target different components of the Hippo pathway and that their activity depends on the nuclear translocation of the Hippo transcriptional effector YAP...
May 15, 2018: Cell Reports
https://www.readbyqxmd.com/read/29765022/tissue-and-cellular-rigidity-and-mechanosensitive-signaling-activation-in-alexander-disease
#6
Liqun Wang, Jing Xia, Jonathan Li, Tracy L Hagemann, Jeffrey R Jones, Ernest Fraenkel, David A Weitz, Su-Chun Zhang, Albee Messing, Mel B Feany
Glial cells have increasingly been implicated as active participants in the pathogenesis of neurological diseases, but critical pathways and mechanisms controlling glial function and secondary non-cell autonomous neuronal injury remain incompletely defined. Here we use models of Alexander disease, a severe brain disorder caused by gain-of-function mutations in GFAP, to demonstrate that misregulation of GFAP leads to activation of a mechanosensitive signaling cascade characterized by activation of the Hippo pathway and consequent increased expression of A-type lamin...
May 15, 2018: Nature Communications
https://www.readbyqxmd.com/read/29758456/gper-hippo-yap-signal-is-involved-in-bisphenol-s-induced-migration-of-triple-negative-breast-cancer-tnbc-cells
#7
Qianqian Deng, Guanmin Jiang, Yingmin Wu, Jiexin Li, Weiting Liang, Likun Chen, Qiao Su, Wuguo Li, Jun Du, Chris K C Wong, Zhuojia Chen, Hongsheng Wang
Nowadays, risk factors of triple-negative breast cancer (TNBC) metastasis are not well identified. Our present study reveals that an industrial chemical, bisphenol S (BPS), can promote the migration, but not the proliferation, of TNBC cells in vitro. BPS activates YAP, a key effector of Hippo pathway, by inhibiting its phosphorylation, which promotes YAP nuclear accumulation and up-regulates its downstream genes such as CTGF and ANKRD1. Inhibition of YAP blocks the BPS-triggered cell migration and up-regulation of fibronectin (FN) and vimentin (Vim)...
May 8, 2018: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/29758331/liver-regeneration-requires-yap1-tgf%C3%AE-dependent-epithelial-mesenchymal-transition-in-hepatocytes
#8
Seh-Hoon Oh, Marzena Swiderska-Syn, Mark L Jewell, Richard T Premont, Anna Mae Diehl
BACKGROUND: Chronic failure of mechanisms that promote effective regeneration of dead hepatocytes causes replacement of functional hepatic parenchyma with fibrous scar and ultimately results in cirrhosis. Therefore, defining and optimizing mechanisms that orchestrate effective regeneration might prevent cirrhosis. We hypothesized that effective regeneration of injured livers requires hepatocytes to evade the growth inhibitory actions of TGF-β since TGF-β signaling inhibits mature hepatocyte growth but drives cirrhosis pathogenesis...
May 11, 2018: Journal of Hepatology
https://www.readbyqxmd.com/read/29754994/corrigendum-to-the-hippo-yap1-pathway-interacts-with-fgfr1-signaling-to-maintain-stemness-in-lung-cancer-canc-lett-423-2018-36-46
#9
Tingting Lu, Ziming Li, Ying Yang, Wenxiang Ji, Yongfeng Yu, Xiaomin Niu, Qingyu Zeng, Weiliang Xia, Shun Lu
No abstract text is available yet for this article.
May 10, 2018: Cancer Letters
https://www.readbyqxmd.com/read/29754899/dynamic-fluctuations-in-subcellular-localization-of-the-hippo-pathway-effector-yorkie-in-vivo
#10
Samuel A Manning, Lucas G Dent, Shu Kondo, Ziqing W Zhao, Nicolas Plachta, Kieran F Harvey
The Hippo pathway is an evolutionarily conserved signaling network that integrates diverse cues to control organ size and cell fate. The central downstream pathway protein in Drosophila is the transcriptional co-activator Yorkie (YAP and TAZ in humans), which regulates gene expression with the Scalloped/TEA domain family member (TEAD) transcription factors [1-8]. A central regulatory step in the Hippo pathway is phosphorylation of Yorkie by the NDR family kinase Warts, which promotes Yorkie cytoplasmic localization by stimulating association with 14-3-3 proteins [9-12]...
April 24, 2018: Current Biology: CB
https://www.readbyqxmd.com/read/29754801/ingestion-of-food-particles-regulates-the-mechanosensing-misshapen-yorkie-pathway-in-drosophila-intestinal-growth
#11
Qi Li, Niraj K Nirala, Yingchao Nie, Hsi-Ju Chen, Gary Ostroff, Junhao Mao, Qi Wang, Lan Xu, Y Tony Ip
The intestinal epithelium has a high cell turnover rate and is an excellent system to study stem cell-mediated adaptive growth. In the Drosophila midgut, the Ste20 kinase Misshapen, which is distally related to Hippo, has a niche function to restrict intestinal stem cell activity. We show here that, under low growth conditions, Misshapen is localized near the cytoplasmic membrane, is phosphorylated at the threonine 194 by the upstream kinase Tao, and is more active toward Warts, which in turn inhibits Yorkie...
May 9, 2018: Developmental Cell
https://www.readbyqxmd.com/read/29749524/multifaceted-regulation-and-functions-of-yap-taz-in-tumors-review
#12
Huirong Liu, Suya Du, Tiantian Lei, Hailian Wang, Xia He, Rongsheng Tong, Yi Wang
The Hippo pathway, initially identified through screenings for mutant tumor suppressors in Drosophila, is an evolutionarily conserved signaling pathway that controls organ size by regulating cell proliferation and apoptosis. Abnormal regulation of the Hippo pathway may lead to cancer in mammals. As the major downstream effectors of the Hippo pathway, unphosphorylated Yes-associated protein (YAP) and its homolog transcriptional co-activator TAZ (also called WWTR1) (hereafter called YAP/TAZ) are translocated into the nucleus...
May 8, 2018: Oncology Reports
https://www.readbyqxmd.com/read/29744354/identification-of-gastric-cancer-related-circular-rna-through-microarray-analysis-and-bioinformatics-analysis
#13
Wei Gu, Ying Sun, Xiong Zheng, Jin Ma, Xiao-Ying Hu, Tian Gao, Mei-Jie Hu
Gastric cancer is one of the common malignant tumors worldwide. Increasing studies have indicated that circular RNAs (circRNAs) play critical roles in the cancer progression and have shown great potential as useful markers and therapeutic targets. However, the precise mechanism and functions of most circRNAs are still unknown in gastric cancer. In the present study, we performed a microarray analysis to detect circRNA expression changes between tumor samples and adjacent nontumor samples. The miRNA expression profiles were obtained from the National Center of Biotechnology Information Gene Expression Omnibus (GEO)...
2018: BioMed Research International
https://www.readbyqxmd.com/read/29743593/sox2-is-required-for-tumor-development-and-cancer-cell-proliferation-in-osteosarcoma
#14
Giulia Maurizi, Narendra Verma, Abhilash Gadi, Alka Mansukhani, Claudio Basilico
The stem cell transcription factor Sox2 is highly expressed in many cancers where it is thought to mark cancer stem cells (CSCs). In osteosarcomas, the most common bone malignancy, high Sox2 expression marks and maintains a fraction of tumor-initiating cells that show all the properties of CSC. Knockdown of Sox2 expression abolishes tumorigenicity and suppresses the CSC phenotype. Here we show that, in a mouse model of osteosarcoma, osteoblast-specific Sox2 conditional knockout (CKO) causes a drastic reduction in the frequency and onset of tumors...
May 10, 2018: Oncogene
https://www.readbyqxmd.com/read/29742619/loss-of-function-mutation-in-hippo-suppressed-enlargement-of-lysosomes-and-neurodegeneration-caused-by-dfig4-knockdown
#15
Yukie Kushimura, Yumiko Azuma, Ikuko Mizuta, Yuuka Muraoka, Akane Kyotani, Hideki Yoshida, Takahiko Tokuda, Toshiki Mizuno, Masamitsu Yamaguchi
Charcot-Marie-Tooth disease (CMT) is the most common hereditary neuropathy, and more than 80 CMT-causing genes have been identified to date. CMT4J is caused by a loss-of-function mutation in the Factor-Induced-Gene 4 (FIG4) gene, the product of which plays important roles in endosome-lysosome homeostasis. We hypothesized that Mammalian sterile 20-like kinase (MST) 1 and 2, tumor-suppressor genes, are candidate modifiers of CMT4J. We therefore examined the interaction between dFIG4 and Hippo (hpo), Drosophila counterparts of FIG4 and MSTs, respectively, using the Drosophila CMT4J model with the knockdown of dFIG4...
May 8, 2018: Neuroreport
https://www.readbyqxmd.com/read/29739703/hippo-signaling-key-emerging-pathway-in-cellular-and-whole-body-metabolism
#16
REVIEW
Amin Ardestani, Blaz Lupse, Kathrin Maedler
The evolutionarily conserved Hippo pathway is a key regulator of organ size and tissue homeostasis. Its dysregulation is linked to multiple pathological disorders. In addition to regulating development and growth, recent studies show that Hippo pathway components such as MST1/2 and LATS1/2 kinases, as well as YAP/TAZ transcriptional coactivators, are regulated by metabolic pathways and that the Hippo pathway controls metabolic processes at the cellular and organismal levels in physiological and metabolic disease states such as obesity, type 2 diabetes (T2D), nonalcoholic fatty liver disease (NAFLD), cardiovascular disorders, and cancer...
May 5, 2018: Trends in Endocrinology and Metabolism: TEM
https://www.readbyqxmd.com/read/29735543/rassf1a-deficiency-enhances-ras-driven-lung-tumorigenesis
#17
M Lee Schmidt, Katharine R Hobbing, Howard Donninger, Geoffrey J Clark
Mutant K-RAS has been shown to have both tumor-promoting and -suppressing functions, and growing evidence suggests that the RASSF family of tumor suppressors can act as RAS apoptosis and senescence effectors. It has been hypothesized that inactivation of the RASSF1A tumor suppressor facilitates K-RAS-mediated transformation by uncoupling it from apoptotic pathways such as the Hippo pathway. In human lung tumors, combined activation of K-RAS and inactivation of RASSF1A is closely associated with the development of the most aggressive and worst prognosis tumors...
May 7, 2018: Cancer Research
https://www.readbyqxmd.com/read/29734788/yap-and-taz-in-lung-cancer-oncogenic-role-and-clinical-targeting
#18
REVIEW
Federica Lo Sardo, Sabrina Strano, Giovanni Blandino
Lung cancer is the leading cause of cancer death in the world and there is no current treatment able to efficiently treat the disease as the tumor is often diagnosed at an advanced stage. Moreover, cancer cells are often resistant or acquire resistance to the treatment. Further knowledge of the mechanisms driving lung tumorigenesis, aggressiveness, metastasization, and resistance to treatments could provide new tools for detecting the disease at an earlier stage and for a better response to therapy. In this scenario, Yes Associated Protein (YAP) and Trascriptional Coactivator with PDZ-binding motif (TAZ), the final effectors of the Hippo signaling transduction pathway, are emerging as promising therapeutic targets...
May 6, 2018: Cancers
https://www.readbyqxmd.com/read/29730476/aicar-antiproliferative-properties-involve-the-ampk-independent-activation-of-the-tumor-suppressors-lats-1-and-2
#19
Chloé Philippe, Benoît Pinson, Jim Dompierre, Véronique Pantesco, Benoît Viollet, Bertrand Daignan-Fornier, Michel Moenner
AICAR (Acadesine) is a pharmacological precursor of purine nucleotide biosynthesis with anti-tumoral properties. Although recognized as an AMP mimetic activator of the protein kinase AMPK, the AICAR monophosphate derivative ZMP was also shown to mediate AMPK-independent effects. In order to unveil these AMPK-independent functions, we performed a transcriptomic analysis in AMPKα1/α2 double knockout murine embryonic cells. Kinetic analysis of the cellular response to AICAR revealed the up-regulation of the large tumor suppressor kinases (Lats) 1 and 2 transcripts, followed by the repression of numerous genes downstream of the transcriptional regulators Yap1 and Taz...
May 3, 2018: Neoplasia: An International Journal for Oncology Research
https://www.readbyqxmd.com/read/29727635/endocardial-hippo-signaling-regulates-myocardial-growth-and-cardiogenesis
#20
Stanley Artap, Lauren J Manderfield, Cheryl L Smith, Andrey Poleshko, Haig Aghajanian, Kelvin See, Li Li, Rajan Jain, Jonathan A Epstein
The Hippo signaling pathway has been implicated in control of cell and organ size, proliferation, and endothelial-mesenchymal transformation. This pathway impacts upon two partially redundant transcription cofactors, Yap and Taz, that interact with other factors, including members of the Tead family, to affect expression of downstream genes. Yap and Taz have been shown to regulate, in a cell-autonomous manner, myocardial proliferation, myocardial hypertrophy, regenerative potential, and overall size of the heart...
May 1, 2018: Developmental Biology
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