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https://www.readbyqxmd.com/read/28087714/dlg5-connects-cell-polarity-and-hippo-signaling-protein-networks-by-linking-par-1-with-mst1-2
#1
Julian Kwan, Anna Sczaniecka, Emad Heidary Arash, Liem Nguyen, Chia-Chun Chen, Srdjana Ratkovic, Olga Klezovitch, Liliana Attisano, Helen McNeill, Andrew Emili, Valeri Vasioukhin
Disruption of apical-basal polarity is implicated in developmental disorders and cancer; however, the mechanisms connecting cell polarity proteins with intracellular signaling pathways are largely unknown. We determined previously that membrane-associated guanylate kinase (MAGUK) protein discs large homolog 5 (DLG5) functions in cell polarity and regulates cellular proliferation and differentiation via undefined mechanisms. We report here that DLG5 functions as an evolutionarily conserved scaffold and negative regulator of Hippo signaling, which controls organ size through the modulation of cell proliferation and differentiation...
December 15, 2016: Genes & Development
https://www.readbyqxmd.com/read/28079891/crb3-regulates-contact-inhibition-by-activating-the-hippo-pathway-in-mammary-epithelial-cells
#2
Xiaona Mao, Pingping Li, Yaochun Wang, Zheyong Liang, Jie Liu, Juan Li, Yina Jiang, Gang Bao, Lei Li, Bofeng Zhu, Yu Ren, Xinhan Zhao, Jianmin Zhang, Yu Liu, Jin Yang, Peijun Liu
The loss of contact inhibition is a hallmark of cancer cells. The Hippo pathway has recently been shown to be an important regulator of contact inhibition, and the cell apical polarity determinant protein CRB3 has been suggested to be involved in Hippo signalling. However, whether CRB3 regulates contact inhibition in mammary cells remains unclear, and the underlying mechanisms have not been elucidated. As shown in the present study, CRB3 decreases cell proliferation, promotes apoptosis, and enhances the formation of tight and adherens junctions...
January 12, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/28078823/hippo-vs-crab-tissue-specific-functions-of-the-mammalian-hippo-pathway
#3
REVIEW
Miki Nishio, Tomohiko Maehama, Hiroki Goto, Keisuke Nakatani, Wakako Kato, Hirofumi Omori, Yosuke Miyachi, Hideru Togashi, Yohei Shimono, Akira Suzuki
The Hippo signaling pathway is a vital suppressor of tumorigenesis that is often inactivated in human cancers. In normal cells, the Hippo pathway is triggered by external forces such as cell crowding, or changes to the extracellular matrix or cell polarity. Once activated, Hippo signaling down-regulates transcription supported by the paralogous cofactors YAP1 and TAZ. The Hippo pathway's functions in normal and cancer biology have been dissected by studies of mutant mice with null or conditional tissue-specific mutations of Hippo signaling elements...
January 2017: Genes to Cells: Devoted to Molecular & Cellular Mechanisms
https://www.readbyqxmd.com/read/28076850/transforming-growth-factor-beta1-suppresses-hepatocellular-carcinoma-proliferation-via-activation-of-hippo-signaling
#4
Xiaodong Zhang, Qing Fan, Yan Li, Zhaoguo Yang, Liang Yang, Zhihong Zong, Biao Wang, Xin Meng, Qin Li, Jingang Liu, Hangyu Li
In this study, we examined the expression of core proteins of the Hippo signaling pathway in hepatocellular carcinoma (HCC) cells treated with transforming growth factor-β 1(TGF-β1) and investigated the relationship between TGF-β1 and the Hippo signaling pathway, in order to better understand their roles in HCC and their potential implications for cancer therapy. We prove that the Hippo signaling pathway is involved in the TGF-β1-induced inhibition of the growth of HCC cells. Large tumor suppressor expression (LATS1) was overexpression and yes association protein 1(YAP1) translocated from the nucleus to the cytoplasm in HCC cells treated with TGF-β1...
January 5, 2017: Oncotarget
https://www.readbyqxmd.com/read/28076326/cytosolic-thumpd1-promotes-breast-cancer-cells-invasion-and-metastasis-via-the-akt-gsk3-snail-pathway
#5
Xiupeng Zhang, Guiyang Jiang, Mingfang Sun, Haijing Zhou, Yuan Miao, Mengyuan Liang, Enhua Wang, Yong Zhang
Human THUMP domain-containing protein 1 (THUMPD1) is a specific adaptor protein that modulates tRNA acetylation through interaction with NAT10. Immunohistochemical analysis of 146 breast cancer specimens (82 triple-negative and 64 non-triple-negative cases) indicated THUMPD1 expression is higher in breast cancer tissues (60.9%, 89/146) than normal breast tissues (28.3%, 15/53; p < 0.001). Overall and cytosolic, but not nuclear, THUMPD1 expression in breast cancer correlated with advanced TNM stage (p = 0...
January 5, 2017: Oncotarget
https://www.readbyqxmd.com/read/28068668/the-hippo-kinases-lats1-and-2-control-human-breast-cell-fate-via-crosstalk-with-er%C3%AE
#6
Adrian Britschgi, Stephan Duss, Sungeun Kim, Joana Pinto Couto, Heike Brinkhaus, Shany Koren, Duvini De Silva, Kirsten D Mertz, Daniela Kaup, Zsuzsanna Varga, Hans Voshol, Alexandra Vissieres, Cedric Leroy, Tim Roloff, Michael B Stadler, Christina H Scheel, Loren J Miraglia, Anthony P Orth, Ghislain M C Bonamy, Venkateshwar A Reddy, Mohamed Bentires-Alj
Cell fate perturbations underlie many human diseases, including breast cancer. Unfortunately, the mechanisms by which breast cell fate are regulated are largely unknown. The mammary gland epithelium consists of differentiated luminal epithelial and basal myoepithelial cells, as well as undifferentiated stem cells and more restricted progenitors. Breast cancer originates from this epithelium, but the molecular mechanisms that underlie breast epithelial hierarchy remain ill-defined. Here, we use a high-content confocal image-based short hairpin RNA screen to identify tumour suppressors that regulate breast cell fate in primary human breast epithelial cells...
January 9, 2017: Nature
https://www.readbyqxmd.com/read/28067668/adaptor-proteins-numb-and-numbl-promote-cell-cycle-withdrawal-by-targeting-erbb2-for-degradation
#7
Maretoshi Hirai, Yoh Arita, C Jane McGlade, Kuo-Fen Lee, Ju Chen, Sylvia M Evans
Failure of trabecular myocytes to undergo appropriate cell cycle withdrawal leads to ventricular noncompaction and heart failure. Signaling of growth factor receptor ERBB2 is critical for myocyte proliferation and trabeculation. However, the mechanisms underlying appropriate downregulation of trabecular ERBB2 signaling are little understood. Here, we have found that the endocytic adaptor proteins NUMB and NUMBL were required for downregulation of ERBB2 signaling in maturing trabeculae. Loss of NUMB and NUMBL resulted in a partial block of late endosome formation, resulting in sustained ERBB2 signaling and STAT5 activation...
January 9, 2017: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/28061504/dub3-deubiquitylating-enzymes-regulate-hippo-pathway-activity-by-regulating-the-stability-of-itch-lats-and-amot-proteins
#8
Hung Thanh Nguyen, Jan-Michael Kugler, Stephen M Cohen
The YAP and TAZ transcriptional coactivators promote oncogenic transformation. Elevated YAP/TAZ activity has been documented in human tumors. YAP and TAZ are negatively regulated by the Hippo tumor suppressor pathway. The activity and stability of several Hippo pathway components, including YAP/TAZ, is regulated by ubiquitin mediated protein turnover and several ubiquitin ligase complexes have been implicated in human cancer. However, little is known about the deubiquitylating enzymes that counteract these ubiquitin ligases in regulation of the Hippo pathway...
2017: PloS One
https://www.readbyqxmd.com/read/28055015/the-taz-mir-224-smad4-axis-promotes-tumorigenesis-in-osteosarcoma
#9
Jianjun Ma, Kangmao Huang, Yan Ma, Menglu Zhou, Shunwu Fan
Transcriptional co-activator with PDZ-binding motif (TAZ) is a downstream effector of the Hippo signaling pathway that participates in tumorigenesis. The aim of this study was to identify the miRNA counterpart for TAZ and elucidate the mechanism underlying the tumorigenic effect of TAZ. We demonstrated that TAZ is upregulated in osteosarcoma (OS) tissues and cell lines, and that TAZ overexpression can induce cell migration, invasion and proliferation. Moreover, miRNA-224 (miR-224), a TAZ phenocopy that functions downstream of TAZ, was found to be upregulated with TAZ overexpression...
January 5, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/28052036/angiomotin-regulates-prostate-cancer-cell-proliferation-by-signaling-through-the-hippo-yap-pathway
#10
Hao Zeng, Angelica Ortiz, Peng-Fei Shen, Chien-Jui Cheng, Yu-Chen Lee, Guoyu Yu, Song-Chang Lin, Chad J Creighton, Li-Yuan Yu-Lee, Sue-Hwa Lin
Angiomotin (AMOT) is a family of proteins found to be a component of the apical junctional complex of vertebrate epithelial cells and is recently found to play important roles in neurofibromatosis type 2 (NF-2). Whether AMOT plays a role in prostate cancer (PCa) is unknown. AMOT is expressed as two isoforms, AMOTp80 and AMOTp130, which has a 409 aa N-terminal domain that is absent in AMOTp80. Both AMOTp80 and AMOTp130 are expressed in LNCaP and C4-2B4, but at a low to undetectable level in PC3, DU145, and BPH1 cells...
December 29, 2016: Oncotarget
https://www.readbyqxmd.com/read/28051067/vgll4-targets-a-tcf4-tead4-complex-to-coregulate-wnt-and-hippo-signalling-in-colorectal-cancer
#11
Shi Jiao, Chuanchuan Li, Qian Hao, Haofei Miao, Lei Zhang, Lin Li, Zhaocai Zhou
Concerted co-regulation of multiple signalling pathways is crucial for tissue homoeostasis and tumorigenesis. Here we report that VGLL4, a previously identified YAP antagonist, also functions as a regulator of Wnt/β-catenin signalling. The expression of VGLL4 is significantly downregulated in clinical colorectal carcinoma (CRC) specimens, positively associated with patient survival rate, and inversely correlated with the expression of Wnt target genes in CRCs. Knockdown of VGLL4 enhances proliferation and tumour formation of CRC cells...
January 4, 2017: Nature Communications
https://www.readbyqxmd.com/read/28042766/insights-into-the-regulation-of-yap-taz-from-cellular-systems-and-mouse-models
#12
Wei Du, Wen Du, Mian Wan, Xuedong Zhou, Xin Xu, Liwei Zheng
The Hippo signaling pathway serves as a main regulator of tissue growth and organ size through the moderation of cell cycle dynamics across many different species. In mammals, the two downstream transcriptional regulators of this pathway are Yes-associated protein (YAP) and transcriptional co-activator with PDZ binding motif (TAZ). Recent studies found in addition to the core Hippo signaling pathway, other signaling pathways can also regulate YAP/TAZ activity, either directly or through crosstalk with the Hippo pathway...
January 2, 2017: Current Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/28041841/actl6a-is-co-amplified-with-p63-in-squamous-cell-carcinoma-to-drive-yap-activation-regenerative-proliferation-and-poor-prognosis
#13
Srinivas Vinod Saladi, Kenneth Ross, Mihriban Karaayvaz, Purushothama R Tata, Hongmei Mou, Jayaraj Rajagopal, Sridhar Ramaswamy, Leif W Ellisen
Loss-of-function mutations in SWI/SNF chromatin-remodeling subunit genes are observed in many cancers, but an oncogenic role for SWI/SNF is not well established. Here, we reveal that ACTL6A, encoding an SWI/SNF subunit linked to stem cell and progenitor cell function, is frequently co-amplified and highly expressed together with the p53 family member p63 in head and neck squamous cell carcinoma (HNSCC). ACTL6A and p63 physically interact, cooperatively controlling a transcriptional program that promotes proliferation and suppresses differentiation, in part through activation of the Hippo-YAP pathway via regulators including WWC1...
January 9, 2017: Cancer Cell
https://www.readbyqxmd.com/read/28035666/roles-and-regulations-of-hippo-signaling-during-preimplantation-mouse-development
#14
REVIEW
Hiroshi Sasaki
During preimplantation development, mouse embryos form two types of cells, the trophoectoderm (TE) and inner cell mass (ICM), by the early blastocyst stage. This process does not require maternal factors localized in the zygotes, and embryos self-organize at the blastocyst stage through intercellular communications. In terms of the mechanisms of cell fate specification, three historical models have been proposed: the positional model, and the original and newer versions of the polarity model. Recent studies have revealed that the intercellular Hippo signaling pathway plays a central role in the specification of the first cell fates...
December 30, 2016: Development, Growth & Differentiation
https://www.readbyqxmd.com/read/28035075/the-hippo-signaling-pathway-provides-novel-anti-cancer-drug-targets
#15
REVIEW
June Sung Bae, Sun Mi Kim, Ho Lee
The Hippo signaling pathway plays a crucial role in cell proliferation, apoptosis, differentiation, and development. Major effectors of the Hippo signaling pathway include the transcriptional co-activators Yes-associated protein 1 (YAP) and WW domain-containing transcription regulator protein 1 (TAZ). The transcriptional activities of YAP and TAZ are affected by interactions with proteins from many diverse signaling pathways as well as responses to the external environment. High YAP and TAZ activity has been observed in many cancer types, and functional dysregulation of Hippo signaling enhances the oncogenic properties of YAP and TAZ and promotes cancer development...
December 27, 2016: Oncotarget
https://www.readbyqxmd.com/read/28031421/the-palmitoyltransferase-approximated-promotes-growth-via-the-hippo-pathway-by-palmitoylation-of-fat
#16
Hitoshi Matakatsu, Seth S Blair, Richard G Fehon
The large protocadherin Fat functions to promote Hippo pathway activity in restricting tissue growth. Loss of Fat leads to accumulation of the atypical myosin Dachs at the apical junctional region, which in turn promotes growth by inhibiting Warts. We previously identified Approximated (App), a DHHC domain palmitoyltransferase, as a negative regulator of Fat signaling in growth control. We show here that App promotes growth by palmitoylating the intracellular domain of Fat, and that palmitoylation negatively regulates Fat function...
January 2, 2017: Journal of Cell Biology
https://www.readbyqxmd.com/read/28026080/transcriptomic-gene-profiling-of-porcine-muscle-tissue-depending-on-histological-properties
#17
Katarzyna Ropka-Molik, Anna Bereta, Kacper Żukowski, Katarzyna Piórkowska, Artur Gurgul, Grzegorz Żak
In pig, the histological profile of muscle tissue, especially the proportion of individual fiber types, is one of the main factors affecting meat quality properties. In the present research, RNA sequencing (RNA-seq) by using next generation sequencing method was applied to estimate the whole gene expression profile of Longissimus lumborum muscle of pigs (Large White breed) differing in the percentage of two fiber types (slow-twitch (type I) fibers and fast-twitch glycolytic (type IIB) fibers). The RNA-seq approach allowed us to identify 355 differentially expressed genes (DEGs) indicated as significant (false discovery rate-adjusted P < 0...
December 27, 2016: Animal Science Journal, Nihon Chikusan Gakkaihō
https://www.readbyqxmd.com/read/28018981/splice-variant-insertions-in-the-c-terminus-impairs-yap-s-transactivation-domain
#18
Megan L Finch-Edmondson, Robyn P Strauss, Joshua S Clayton, George C Yeoh, Bernard A Callus
The yes-associated protein (YAP) is a key effector of the mammalian Hippo signaling pathway. YAP has eight known alternately spliced isoforms and these are widely expressed across multiple tissues. Variable effects have been ascribed to different YAP isoforms by inducing their expression in cells, but whether these differences are due to variability in the transcriptional potency of individual YAP isoforms has not been addressed. Indeed a systematic comparison of the transcriptional potencies of YAP isoforms has not been done...
July 2016: Biochemistry and Biophysics Reports
https://www.readbyqxmd.com/read/28007917/want-to-promote-tissue-growth-there-s-an-app-for-that
#19
Ben Short
Study describes how a palmitoyltransferase regulates the Hippo pathway in flies.
January 2, 2017: Journal of Cell Biology
https://www.readbyqxmd.com/read/28004182/cdk5rap2-interaction-with-components-of-the-hippo-signaling-pathway-may-play-a-role-in-primary-microcephaly
#20
Salil K Sukumaran, Maria Stumpf, Sarah Salamon, Ilyas Ahmad, Kurchi Bhattacharya, Sarah Fischer, Rolf Müller, Janine Altmüller, Birgit Budde, Holger Thiele, Muhammad Tariq, Naveed Altaf Malik, Peter Nürnberg, Shahid Mahmood Baig, Muhammad Sajid Hussain, Angelika A Noegel
Autosomal recessive primary microcephaly (MCPH) is characterized by a substantial reduction in brain size but with normal architecture. It is often linked to mutations in genes coding for centrosomal proteins; however, their role in brain size regulation is not completely understood. By combining homozygosity mapping and whole-exome sequencing in an MCPH family from Pakistan, we identified a novel mutation (XM_011518861.1; c.4114C > T) in CDK5RAP2, the gene associated with primary microcephaly-3 (MCPH3), leading to a premature stop codon (p...
December 21, 2016: Molecular Genetics and Genomics: MGG
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