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https://www.readbyqxmd.com/read/28323899/lawsonia-intracellularis-exploits-%C3%AE-catenin-wnt-and-notch-signalling-pathways-during-infection-of-intestinal-crypt-to-alter-cell-homeostasis-and-promote-cell-proliferation
#1
Yang W Huan, Rebecca J Bengtsson, Neil MacIntyre, Jack Guthrie, Heather Finlayson, Sionagh H Smith, Alan L Archibald, Tahar Ait-Ali
Lawsonia intracellularis is an obligate intracellular bacterial pathogen that causes proliferative enteropathy (PE) in pigs. L. intracellularis infection causes extensive intestinal crypt cell proliferation and inhibits secretory and absorptive cell differentiation. However, the affected host upstream cellular pathways leading to PE are still unknown. β-catenin/Wnt signalling is essential in maintaining intestinal stem cell (ISC) proliferation and self-renewal capacity, while Notch signalling governs differentiation of secretory and absorptive lineage specification...
2017: PloS One
https://www.readbyqxmd.com/read/28323888/lzts2-and-pten-collaboratively-regulate-%C3%A3-catenin-in-prostatic-tumorigenesis
#2
Eun-Jeong Yu, Erika Hooker, Daniel T Johnson, Mi Kyung Kwak, Kang Zou, Richard Luong, Yongfeng He, Zijie Sun
The leucine zipper tumor suppressor 2 (LZTS2) was identified as a tumor susceptibility gene within the 10q24.3 chromosomal region, and is approximately 15Mb from the PTEN locus. This region containing the both loci is frequently deleted in a variety of human malignancies, including prostate cancer. LZTS2 is a ß-catenin-binding protein and a negative regulator of Wnt signaling. Overexpression of PTEN in prostate cancer cell lines reduces ß-catenin-mediated transcriptional activity. In this study, we examined the collaborative effect of PTEN and LZTS2 using multiple in vitro and in vivo approaches...
2017: PloS One
https://www.readbyqxmd.com/read/28318631/the-antihelmenthic-phosphate-niclosamide-impedes-renal-fibrosis-by-inhibiting-homeodomain-interacting-protein-kinase-2-expression
#3
Xiaoyan Chang, Xin Zhen, Jixing Liu, Xiaomei Ren, Zheng Hu, Zhanmei Zhou, Fengxin Zhu, Ke Ding, Jing Nie
Renal fibrosis is the final common pathway of all varieties of progressive chronic kidney disease. However, there are no effective therapies to prevent or slow the progression of renal fibrosis. Niclosamide is a US Food and Drug Administration-approved oral antihelminthic drug used for treating most tapeworm infections. Here, we demonstrated that phosphate niclosamide, the water-soluble form of niclosamide, significantly reduced proteinuria, glomerulosclrotic lesions, and interstitial fibrosis in a murine model of adriamycin nephropathy...
March 16, 2017: Kidney International
https://www.readbyqxmd.com/read/28317864/targeted-deletion-of-crif1-in-mouse-epidermis-impairs-skin-homeostasis-and-hair-morphogenesis
#4
Jung-Min Shin, Dae-Kyoung Choi, Kyung-Cheol Sohn, Ji-Young Kim, Myung Im, Young Lee, Young-Joon Seo, Minho Shong, Jeung-Hoon Lee, Chang Deok Kim
The epidermis, which consists mainly of keratinocytes, acts as a physical barrier to infections by regulating keratinocyte proliferation and differentiation. Hair follicles undergo continuous cycling to produce new one. Therefore, optimum supply of energy from the mitochondria is essential for maintaining skin homeostasis and hair growth. CRIF1 is a mitochondrial protein that regulates mitoribosome-mediated synthesis and insertion of mitochondrial oxidative phosphorylation polypeptides into the mitochondrial membrane in mammals...
March 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28315345/inositol-hexaphosphate-suppresses-colorectal-cancer-cell-proliferation-via-the-akt-gsk-3%C3%AE-%C3%AE-catenin-signaling-cascade-in-a-1-2-dimethylhydrazine-induced-rat-model
#5
Wenyang Yu, Cuiping Liu, Xin Li, Fuguo Yang, Lixue Cheng, Chang Liu, Yang Song
Colorectal cancer (CRC) is common worldwide, and most treatments for CRC have undesirable side effects. Many researchers have demonstrated that inositol hexaphosphate (IP6) has potent anticarcinogenic activity against CRC and no apparent toxicity to normal cells. However, the underlying mechanism is still unclear. In this study, we investigated the anticancer and anti-proliferative properties of IP6 in CRC and its possible mechanisms during this chemopreventive process. We examined the expression of genes related to the PI3K/Akt and Wnt pathways at the transcriptional and translational levels in a DMH-induced rat CRC model following IP6 administration...
March 15, 2017: European Journal of Pharmacology
https://www.readbyqxmd.com/read/28314338/wnt-signaling-methods-and-protocols
#6
(no author information available yet)
No abstract text is available yet for this article.
March 2017: Anticancer Research
https://www.readbyqxmd.com/read/28304136/zebrafish-models-of-non-canonical-wnt-planar-cell-polarity-signalling-fishing-for-valuable-insight-into-vertebrate-polarized-cell-behavior
#7
REVIEW
Maria Jussila, Brian Ciruna
Planar cell polarity (PCP) coordinates the uniform orientation, structure and movement of cells within the plane of a tissue or organ system. It is beautifully illustrated in the polarized arrangement of bristles and hairs that project from specialized cell surfaces of the insect abdomen and wings, and pioneering genetic studies using the fruit fly, Drosophila melanogaster, have defined a core signalling network underlying PCP. This core PCP/non-canonical Wnt signalling pathway is evolutionarily conserved, and studies in zebrafish have helped transform our understanding of PCP from a peculiarity of polarized epithelia to a more universal cellular property that orchestrates a diverse suite of polarized cell behaviors that are required for normal vertebrate development...
March 17, 2017: Wiley Interdisciplinary Reviews. Developmental Biology
https://www.readbyqxmd.com/read/28303973/e6-e7-p53-pou2f1-cthrc1-axis-promotes-cervical-cancer-metastasis-and-activates-wnt-pcp-pathway
#8
Rong Zhang, Huan Lu, Yuan-Yuan Lyu, Xiao-Mei Yang, Lin-Yan Zhu, Guang-Dong Yang, Peng-Cheng Jiang, Yuan Re, Wei-Wei Song, Jin-Hao Wang, Can-Can Zhang, Fei Gu, Tian-Jiao Luo, Zhi-Yong Wu, Cong-Jian Xu
Cervical cancer is an infectious cancer and the most common gynecologic cancer worldwide. E6/E7, the early genes of the high-risk mucosal human papillomavirus type, play key roles in the carcinogenic process of cervical cancer. However, little was known about its roles in modulating tumor microenvironment, particular extracellular matrix (ECM). In this study, we found that E6/E7 could regulate multiple ECM proteins, especially collagen triple helix repeat containing 1 (CTHRC1). CTHRC1 is highly expressed in cervical cancer tissue and serum and closely correlated with clinicopathological parameters...
March 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28303901/mutual-reinforcement-between-telomere-capping-and-canonical-wnt-signalling-in-the-intestinal-stem-cell-niche
#9
Ting-Lin B Yang, Qijun Chen, Jennifer T Deng, Geetha Jagannathan, John W Tobias, David C Schultz, Shan Wang, Christopher J Lengner, Anil K Rustgi, John P Lynch, F Brad Johnson
Critical telomere shortening (for example, secondary to partial telomerase deficiency in the rare disease dyskeratosis congenita) causes tissue pathology, but underlying mechanisms are not fully understood. Mice lacking telomerase (for example, mTR(-/-) telomerase RNA template mutants) provide a model for investigating pathogenesis. In such mice, after several generations of telomerase deficiency telomeres shorten to the point of uncapping, causing defects most pronounced in high-turnover tissues including intestinal epithelium...
March 17, 2017: Nature Communications
https://www.readbyqxmd.com/read/28303247/effect-of-wnt-signaling-on-the-differentiation-of-islet-%C3%AE-cells-from-adipose-derived-stem-cells
#10
Hefei Wang, Yu Ren, Xiao Hu, Min Ma, Xiao Wang, Hao Liang, Dongjun Liu
The Wnt signaling is critical for pancreatic development and islet function; however, its precise effects on the development and function of the β-cells remain controversial. Here we examined mRNA and protein expression of components of the Wnt signaling throughout the differentiation of islet β-cells from adipose-derived stem cells (ADSCs). After induction, ADSCs expressed markers of β-cells, including the insulin, PDX1, and glucagon genes, and the PDX1, CK19, nestin, insulin, and C-peptide proteins, indicating their successful differentiation...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28302747/glutathione-peroxidase-4-inhibits-wnt-%C3%AE-catenin-signaling-and-regulates-dorsal-organizer-formation-in-zebrafish-embryos
#11
Xiaozhi Rong, Yumei Zhou, Yunzhang Liu, Beibei Zhao, Bo Wang, Caixia Wang, Xiaoxia Gong, Peipei Tang, Ling Lu, Yun Li, Chengtian Zhao, Jianfeng Zhou
The Wnt/β-catenin signaling pathway plays pivotal roles in axis formation during embryogenesis and in adult tissue homeostasis. Glutathione peroxidase 4 (GPx4) is a selenoenzyme and participates in the reduction of peroxides. Its synthesis depends on the availability of the element selenium. However, the roles of GPx4 in vertebrate embryonic development and underlying mechanisms are largely unknown. Here, we show that maternal loss of zebrafish gpx4b promotes embryonic dorsal organizer formation, whereas overexpression of GPx4b inhibits the development of the dorsal organizer...
March 16, 2017: Development
https://www.readbyqxmd.com/read/28300597/gli2-is-a-regulator-of-%C3%AE-catenin-and-is-associated-with-loss-of-e-cadherin-cell-invasiveness-and-long-term-epidermal-regeneration
#12
Eleni Pantazi, Emilios Gemenetzidis, Muy-Teck Teh, Sreekanth Vootukuri Reddy, Gary Warnes, Chris Evagora, Giuseppe Trigiante, Michael P Philpott
Uncontrolled HH/GLI and WNT/β-catenin signaling are important events in the genesis of many cancers including skin cancer and are often implicated in tumour progression, invasion and metastasis. However, due to the complexity and context-dependency of both pathways, little is known about HH and WNT interactions in human carcinogenesis. In the current study we provide evidence of HH/GLI2-WNT/β-catenin signaling crosstalk in human keratinocytes. Over-expression of GLI2ΔN in human keratinocytes resulted in cytoplasmic accumulation and nuclear relocalization of β-catenin in vitro and in 3D-organotypic cultures, accompanied by upregulation of WNT genes...
March 11, 2017: Journal of Investigative Dermatology
https://www.readbyqxmd.com/read/28300286/clinical-significance-and-prognosis-value-of-wnt-signaling-pathway-in-cervical-cancer
#13
Afsane Bahrami, Malihe Hasanzadeh, Soodabeh ShahidSales, Zohre Yousefi, Sima Kadkhodayan, Marjaneh Farazestanian, Mona Joudi Mashhad, Masoumeh Gharib, Seyed Mahdi Hassanian, Amir Avan
Cervical cancer is among the most commonly diagnosed cancer in women, supporting the need for identification of novel prognostic and predictive biomarkers to predict the risk of developing of this malignancy or predict the prognosis of patients. Against this background, the activation of the Wingless-type (Wnt)/β-catenin pathway has been suggested as the main dysregulated pathways, which is involved in the multistep process of cervical carcinogenesis, suggesting its value as a potential biomarker or therapeutic target...
March 16, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/28300015/frzb-and-melusin-overexpressed-in-lgmd2a-regulate-integrin-%C3%AE-1d-isoform-replacement-altering-myoblast-fusion-and-the-integrin-signalling-pathway
#14
Oihane Jaka, Leire Casas-Fraile, Margarita Azpitarte, Ana Aiastui, Adolfo López de Munain, Amets Sáenz
Limb-girdle muscular dystrophy type 2A (LGMD2A) is characterised by muscle wasting and progressive degeneration of proximal muscles because of mutations in the CAPN3 gene. However, the underlying pathophysiological mechanisms of muscle degeneration are still not well understood. The objective of this study was to assess the relevance of genes with differential expression in the muscle of LGMD2A patients. For this purpose, we analysed their in vitro expression in primary cultures of human myoblasts and myotubes...
March 16, 2017: Expert Reviews in Molecular Medicine
https://www.readbyqxmd.com/read/28299632/transgenic-expression-of-a-canonical-wnt-inhibitor-kallistatin-is-associated-with-decreased-circulating-cd19-b-lymphocytes-in-the-peripheral-blood
#15
Jeffrey D McBride, Xiaochen Liu, William L Berry, Ralf Janknecht, Rui Cheng, Kelu Zhou, Evangelos V Badiavas, Jian-Xing Ma
Members of the family of serine proteinase inhibitors, such as kallistatin, have been shown to inhibit canonical Wnt-TCF/LEF-β-catenin signaling via their interactions with the Wnt co-receptor LRP6. Yet the effects of transgenic overexpression of anti-Wnt serpins on hematopoiesis and lymphopoiesis are not well known. We studied the effects of human kallistatin (SERPINA4) on Wnt reporter activity in various cell types throughout the hematopoietic system and associated impacts on circulating white blood cell profiles...
March 15, 2017: International Journal of Hematology
https://www.readbyqxmd.com/read/28298922/interactions-between-ppar-gamma-and-the-canonical-wnt-beta-catenin-pathway-in-type-2-diabetes-and-colon-cancer
#16
REVIEW
Yves Lecarpentier, Victor Claes, Alexandre Vallée, Jean-Louis Hébert
In both colon cancer and type 2 diabetes, metabolic changes induced by upregulation of the Wnt/beta-catenin signaling and downregulation of peroxisome proliferator-activated receptor gamma (PPAR gamma) may help account for the frequent association of these two diseases. In both diseases, PPAR gamma is downregulated while the canonical Wnt/beta-catenin pathway is upregulated. In colon cancer, upregulation of the canonical Wnt system induces activation of pyruvate dehydrogenase kinase and deactivation of the pyruvate dehydrogenase complex...
2017: PPAR Research
https://www.readbyqxmd.com/read/28297666/canonical-wnt-signaling-ameliorates-aging-of-intestinal-stem-cells
#17
Kodandaramireddy Nalapareddy, Kalpana J Nattamai, Rupali S Kumar, Rebekah Karns, Kathryn A Wikenheiser-Brokamp, Leesa L Sampson, Maxime M Mahe, Nambirajan Sundaram, Mary-Beth Yacyshyn, Bruce Yacyshyn, Michael A Helmrath, Yi Zheng, Hartmut Geiger
Although intestinal homeostasis is maintained by intestinal stem cells (ISCs), regeneration is impaired upon aging. Here, we first uncover changes in intestinal architecture, cell number, and cell composition upon aging. Second, we identify a decline in the regenerative capacity of ISCs upon aging because of a decline in canonical Wnt signaling in ISCs. Changes in expression of Wnts are found in stem cells themselves and in their niche, including Paneth cells and mesenchyme. Third, reactivating canonical Wnt signaling enhances the function of both murine and human ISCs and, thus, ameliorates aging-associated phenotypes of ISCs in an organoid assay...
March 14, 2017: Cell Reports
https://www.readbyqxmd.com/read/28296881/transcriptomic-responses-to-environmental-temperature-by-turtles-with-temperature-dependent-and-genotypic-sex-determination-assessed-by-rnaseq-inform-the-genetic-architecture-of-embryonic-gonadal-development
#18
Srihari Radhakrishnan, Robert Literman, Jennifer Neuwald, Andrew Severin, Nicole Valenzuela
Vertebrate sexual fate is decided primarily by the individual's genotype (GSD), by the environmental temperature during development (TSD), or both. Turtles exhibit TSD and GSD, making them ideal to study the evolution of sex determination. Here we analyze temperature-specific gonadal transcriptomes (RNA-sequencing validated by qPCR) of painted turtles (Chrysemys picta TSD) before and during the thermosensitive period, and at equivalent stages in soft-shell turtles (Apalone spinifera-GSD), to test whether TSD's and GSD's transcriptional circuitry is identical but deployed differently between mechanisms...
2017: PloS One
https://www.readbyqxmd.com/read/28296634/constitutive-scaffolding-of-multiple-wnt-enhanceosome-components-by-legless-bcl9
#19
Laurens M van Tienen, Juliusz Mieszczanek, Marc Fiedler, Trevor J Rutherford, Mariann Bienz
Wnt/β-catenin signaling elicits context-dependent transcription switches that determine normal development and oncogenesis. These are mediated by the Wnt enhanceosome, a multiprotein complex binding to the Pygo chromatin reader and acting through TCF/LEF-responsive enhancers. Pygo renders this complex Wnt-responsive, by capturing β-catenin via the Legless/BCL9 adaptor. We used CRISPR/Cas9 genome engineering of Drosophila legless (lgs) and human BCL9 and B9L to show that the C-terminus downstream of their adaptor elements is crucial for Wnt responses...
March 15, 2017: ELife
https://www.readbyqxmd.com/read/28296140/inhibitors-of-stat3-%C3%AE-catenin-and-igf-1r-sensitize%C3%A2-mouse-pik3ca%C3%A2-mutant%C3%A2-breast-cancer-to-pi3k-inhibitors
#20
Vanessa F Merino, Soonweng Cho, Xiaohui Liang, Sunju Park, Kideok Jin, Qian Chen, Duojia Pan, Cynthia A Zahnow, Alan R Rein, Saraswati Sukumar
Although mutations in the phosphoinositide 3-kinase-catalytic subunit (PIK3CA) are common in breast cancer, PI3K inhibitors alone have shown modest efficacy. We sought to identify additional pathways altered in PIK3CA mutant tumors that might be targeted in combination with PI3K inhibitors. We generated two transgenic mouse models expressing the human PIK3CA-H1047R and the -E545K hotspot mutant genes in the mammary gland and evaluated their effects on development and tumor formation. Molecular analysis identified pathways altered in these mutant tumors, which were also targeted in multiple cells lines derived from the PIK3CA tumors...
March 15, 2017: Molecular Oncology
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