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https://www.readbyqxmd.com/read/27888801/common-profiles-of-notch-signaling-differentiate-disease-free-survival-in-luminal-type-a-and-triple-negative-breast-cancer
#1
Magdalena Orzechowska, Dorota Jędroszka, Andrzej K Bednarek
Breast cancer (BC) is characterized by high heterogeneity regarding its biology and clinical characteristics. The Notch pathway regulates such processes as organ modeling and epithelial-to-mesenchymal transition (EMT).The aim of the study was to determine the effect of differential expression of Notch members on disease-free survival (DFS) in luminal type A (lumA) and triple negative (TN) BC.The differential expression of 19 Notch members was examined in a TCGA BC cohort. DFS analysis was performed using the log-rank test (p<0...
November 19, 2016: Oncotarget
https://www.readbyqxmd.com/read/27880939/inhibition-of-the-transcriptional-repressor-complex-bcl-6-bcor-induces-endothelial-sprouting-but-does-not-promote-tumor-growth
#2
Elisabeth Buchberger, Dietmar Payrhuber, Miriam El Harchi, Branislav Zagrapan, Katharina Scheuba, Anna Zommer, Edina Bugyik, Balazs Dome, Julia Barbara Kral, Waltraud Cornelia Schrottmaier, Gernot Schabbauer, Peter Petzelbauer, Marion Gröger, Martin Bilban, Christine Brostjan
The oncogenic potential of the transcriptional repressor Bcl-6 (B-cell lymphoma 6) was originally discovered in non-Hodgkin patients and the soluble Bcl-6 inhibitor 79-6 was developed to treat diffuse large B-cell lymphomas with aberrant Bcl-6 expression. Since we found Bcl-6 and its co-repressor BCoR (Bcl-6 interacting co-repressor) to be regulated in human microvascular endothelium by colorectal cancer cells, we investigated their function in sprouting angiogenesis which is central to tumor growth. Based on Bcl-6/BCoR gene silencing we found that the transcriptional repressor complex in fact constitutes an endogenous inhibitor of vascular sprouting by supporting the stalk cell phenotype: control of Notch target genes (HES1, HEY1, DLL4) and cell cycle regulators (cyclin A and B1)...
November 21, 2016: Oncotarget
https://www.readbyqxmd.com/read/27879131/spatio-temporal-models-of-synthetic-genetic-oscillators
#3
Cicely K Macnamara, Mark A J Chaplain
Signal transduction pathways play a major role in many important aspects of cellular function e.g. cell division, apoptosis. One important class of signal transduction pathways is gene regulatory networks (GRNs). In many GRNs, proteins bind to gene sites in the nucleus thereby altering the transcription rate. Such proteins are known as transcription factors. If the binding reduces the transcription rate there is a negative feedback leading to oscillatory behaviour in mRNA and protein levels, both spatially (e...
February 1, 2017: Mathematical Biosciences and Engineering: MBE
https://www.readbyqxmd.com/read/27878242/esc-3-induces-apoptosis-of-human-ovarian-carcinomas-through-wnt-%C3%AE-catenin-and-notch-signaling-in-vitro-and-in-vivo
#4
Qi-Rui Fu, Wei Song, Yi-Tao Deng, Hua-Liang Li, Xiao-Mei Mao, Chen-Lu Lin, Ya-Hui Zheng, Shu-Ming Chen, Qiong-Hua Chen, Qing-Xi Chen
Apoptosis, programmed cell death under physiological or pathological conditions, plays a critical role in the tissue homeostasis of eukaryotes. It is desirable to prevent the occurrence and metastasis of cancer through inducing apoptosis. Our previous study demonstrated that apoptosis could be induced by extract from crocodile in human cholangiocarcinoma. ESC-3, a novel cytotoxic compound isolated from the extract induced apoptosis in Mz-ChA-1 cells via the mitochondria-dependent pathway in a dose-dependent manner...
November 18, 2016: International Journal of Oncology
https://www.readbyqxmd.com/read/27862316/cdx2-expression-induced-by-leukocytapheresis-might-be-associated-with-mucosal-healing-in-ulcerative-colitis
#5
Kiichiro Tsuchiya, Ryohei Hayashi, Keita Fukushima, Shuji Hibiya, Nobukatsu Horita, Mariko Negi, Eisaku Itoh, Takumi Akashi, Yoshinobu Eishi, Satoshi Motoya, Yoshiaki Takeuchi, Reiko Kunisaki, Ken Fukunaga, Shiro Nakamura, Naoki Yoshimura, Masakazu Takazoe, Bunei Iizuka, Yasuo Suzuki, Masakazu Nagahori, Mamoru Watanabe
BACKGROUND AND AIMS: Ulcerative colitis (UC) is a chronic inflammatory disease of the colon with an intractable, recurrent course. Although the goal of UC therapy has recently been to target mucosal healing, the molecular mechanism of mucosal healing remains unknown. In this study, we aimed to elucidate the molecular dynamics related to the proliferation and differentiation of intestinal epithelial cells (IECs) during cytapheresis therapy in a short duration. METHODS: Endoscopy was performed in 26 patients with UC in multicentre hospitals, and biopsy specimens were collected from the rectum before and within two weeks after leukocytapheresis (LCAP)...
November 11, 2016: Journal of Gastroenterology and Hepatology
https://www.readbyqxmd.com/read/27861873/notch-signaling-pathway-regulates-angiogenesis-via-endothelial-cell-in-3d-co-culture-model
#6
Dan Zhao, Changyue Xue, Shiyu Lin, Sirong Shi, Qianshun Li, Mengting Liu, Xiaoxiao Cai, Yunfeng Lin
This study aimed to investigate the role of Notch signaling pathway for angiogenesis in a three-dimensional (3D) collagen gel model with co-culture of adipose-derived stromal cells (ASCs) and endothelial cells (ECs). A 3D collagen gel model was established in vitro by implanting both ASCs from green fluorescent protein-labeled mouse and ECs from red fluorescent protein-labeled mouse, and the phenomena of angiogenesis with Notch signaling inducer Jagged1, inhibitor DAPT and PBS, respectively were observed by confocal laser scanning microscopy...
November 10, 2016: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/27852366/-effects-and-mechanisms-of-notch-signaling-pathway-on-immune-imbalance-in-chronic-obstructive-pulmonary-disease
#7
X N Yang, X J Liu, L T Zhao, X L Zeng, H R Bao
Objective: To explore the role of Notch signaling pathway on immune imbalance in chronic obstructive pulmonary disease (COPD). Methods: Thirty BALB/c mice were randomly assigned into the healthy control group, COPD group, and COPD Gamma secretase inhibitors (GSI) group. Cigarette smoke exposure was used to establish the COPD model. T cells were enriched by filtering through nylon wool columns. The proportion of spleen-derived T-lymphocyte subsets was detected by flow cytometry. Real-time quantitative polymerase chain reaction (RT-PCR) and Western blot (WB) were used to detect the expression of splenic T cells' Notch1 and its downstream Hes1 mRNA and protein respectively...
November 12, 2016: Chinese Journal of Tuberculosis and Respiratory Diseases
https://www.readbyqxmd.com/read/27847205/sialylated-%C3%AE-1-6-branched-n-glycans-modulate-the-adhesion-invasion-and-metastasis-of-hepatocarcinoma-cells
#8
Xiao Yu, Yujie Zhao, Liping Wang, Xixi Chen, Zhen Su, Han Zhang, Qingmin Yuan, Shujing Wang
The mouse hepatocarcinoma cell lines Hca-F and Hca-P have been derived from hepatocarcinoma in mice and metastasize only to the lymph node. Hca-F cells displayed greater lymphatic metastasis ability than Hca-P cells. When the two cell lines were compared for cell surface sialylated β1,6 branched N-glycans by flow cytometry using L-PHA and SNA, Hca-F cells were found to express significantly higher levels. To explore the effect of increased sialylated β1,6 branched N-glycans on hepatocarcinoma progression, we inhibit their expression in Hca-F cells by using swainsonine treatment and RNA interference...
November 12, 2016: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/27847111/the-epstein-barr-virus-ebna2-protein-induces-a-subset-of-notch-target-genes-in-thyroid-cancer-cell-lines-but-fails-to-suppress-proliferation
#9
Sean Golden, Xiao-Min Yu, Scott Odorico, Vansh Jain, Ana Marin, Shidong Ma, Shannon Kenney, Herbert Chen
BACKGROUND: Epstein-Barr virus is associated with lymphoid and epithelial malignancies and has been reported to infect thyroid cells. The Epstein-Barr virus protein, EBNA2, regulates viral and cellular promoters by binding to RBP-jκ. Similarly, NOTCH1, a tumor suppressor protein in thyroid epithelial cells, competes with EBNA2 for binding to overlapping sites on RBP-jκ. EBNA2 activates a subset of NOTCH-responsive genes in lymphocytes and myocytes; however, the effect of EBNA2 expression on NOTCH targets in epithelial cells is unknown...
November 12, 2016: Surgery
https://www.readbyqxmd.com/read/27821476/notch-downregulation-and-extramedullary-erythrocytosis-in-hif-prolyl-4-hydroxylase-2-deficient-mice
#10
Mikko N M Myllymäki, Jenni Määttä, Elitsa Y Dimova, Valerio Izzi, Timo Väisänen, Johanna Myllyharju, Peppi Koivunen, Raisa Serpi
Erythrocytosis is mainly driven by erythropoietin, which is regulated by hypoxia-inducible factor (HIF). Mutations in HIF prolyl 4-hydroxylase 2 (HIF-P4H-2/PHD2/EGLN1), the major downregulator of HIFα subunits, are found in familiar erythrocytosis, and large-spectrum conditional inactivation of HIF-P4H-2 in mice leads to severe erythrocytosis. Although bone marrow is the primary site for erythropoiesis, spleen remains capable for extramedullary erythropoiesis. We studied HIF-P4H-2 deficient mice (Hif-p4h-2(gt/gt)) which show slightly induced erythropoiesis upon aging despite non-increased erythropoietin levels, and identified spleen as the site of extramedullary erythropoiesis...
November 7, 2016: Molecular and Cellular Biology
https://www.readbyqxmd.com/read/27821050/stringent-comparative-sequence-analysis-reveals-sox10-as-a-putative-inhibitor-of-glial-cell-differentiation
#11
Chetna Gopinath, William D Law, José F Rodríguez-Molina, Arjun B Prasad, Lingyun Song, Gregory E Crawford, James C Mullikin, John Svaren, Anthony Antonellis
BACKGROUND: The transcription factor SOX10 is essential for all stages of Schwann cell development including myelination. SOX10 cooperates with other transcription factors to activate the expression of key myelin genes in Schwann cells and is therefore a context-dependent, pro-myelination transcription factor. As such, the identification of genes regulated by SOX10 will provide insight into Schwann cell biology and related diseases. While genome-wide studies have successfully revealed SOX10 target genes, these efforts mainly focused on myelinating stages of Schwann cell development...
November 7, 2016: BMC Genomics
https://www.readbyqxmd.com/read/27807176/hiv-tat-impairs-neurogenesis-through-functioning-as-a-notch-ligand-and-activation-of-notch-signaling-pathway
#12
Yan Fan, Xiang Gao, Jinhui Chen, Ying Liu, Johnny J He
: Alterations in adult neurogenesis have been noted in the brain of HIV-infected individuals and are likely linked to HIV-associated neurocognitive deficits, including those in learning and memory. But the underlying molecular mechanisms are not fully understood. In the study, we took advantage of doxycycline-inducible and astrocyte-specific HIV-1 Tat transgenic mice (iTat) and determined the relationship between Tat expression and neurogenesis. Tat expression in astrocytes was associated with fewer neuron progenitor cells (NPCs), fewer immature neurons, and fewer mature neurons in the dentate gyrus of the hippocampus of the mouse brain...
November 2, 2016: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/27786411/hes4-a-potential-prognostic-biomarker-for-newly-diagnosed-patients-with-high-grade-osteosarcoma
#13
Madonna McManus, Eugenie Kleinerman, Yanwen Yang, John Andrew Livingston, Jared Mortus, Rocio Rivera, Patrick Zweidler-McKay, Keri Schadler
BACKGROUND: Prognostic biomarkers for osteosarcoma (OS) at the time of diagnosis are lacking. Necrotic response of OS to preoperative chemotherapy correlates with survival and is determined 3-4 months after diagnosis. The purpose of this study is to identify biomarkers that will stratify patients into good or poor responders to chemotherapy at diagnosis and determine the role of potential biomarkers in OS pathogenesis. PROCEDURE: Because OS may be caused by disruptions of osteogenic differentiation, and the Notch pathway is one regulator of bone development, we examined the link between Notch effectors, OS differentiation, and OS outcome...
October 27, 2016: Pediatric Blood & Cancer
https://www.readbyqxmd.com/read/27784795/the-potential-roles-of-long-non-coding-rnas-lncrnas-in-glioblastoma-development
#14
Shuang Liu, Ramkrishna Mitra, Ming-Ming Zhao, Wenhong Fan, Christine M Eischen, Feng Yin, Zhongming Zhao
Long non-coding RNA (lncRNA) may contribute to the initiation and progression of tumor. In this study, we first systematically compared lncRNA and mRNA expression between GBM and paired normal brain tissues using microarray data. We found 27 lncRNA and 82 mRNA significantly up-regulated in GBM, as well as 198 lncRNA and 285 mRNA significantly down-regulated in GBM. We identified 138 co-expressed lncRNA-mRNA pairs from these differentially expressed lncRNA and genes. Subsequent pathway analysis of the lncRNA-paired genes indicated that EphrinB-EPHB, p75-mediated signaling, TNF alpha/NF-κB, and ErbB2/ErbB3 signaling pathways might be altered in GBM...
October 26, 2016: Molecular Cancer Therapeutics
https://www.readbyqxmd.com/read/27784373/-effects-of-vpa-on-the-expression-of-notch-signaling-pathway-in-multiple-myeloma-rpmi-8226-cell-line
#15
Lian Qiao, Yue Yang, Rui-Juan Zhao, Li-Hong Wang, Lei Zhao, Li-Na Yan, Zhi-Hua Zhang, Chang-Lai Hao
OBJECTIVE: To investigate the effects of valproic acid(VPA) on the expression of intracellular domain of Notch1 (ICN1) and Hes1 in multiple myeloma RPMI 8226 cell line. METHODS: Experiments were divided into 4 group: blank control group and groups of cells treated with VPA of different concentration (2, 4, 8 mmol/L), the cell proliferation was detected by MTT method, RT-PCR was applied to detect the mRNA expression level of ICN1 and Hes1. Western blot was used to detect the protein expression of ICN1 and Hes1...
October 2016: Zhongguo Shi Yan Xue Ye Xue za Zhi
https://www.readbyqxmd.com/read/27770268/sensitizing-effect-of-juglone-is-mediated-by-down-regulation-of-notch1-signaling-pathway-in-trastuzumab-resistant-skbr3-cells
#16
Soraya Sajadimajd, Razieh Yazdanparast
Trastuzumab (Herceptin) monoclonal antibody directed against HER2 receptor has been administered as a treatment for metastatic HER2 positive breast cancer. The problematic issue in treatment of HER2 positive breast cancer cells is commonly the induction of resistance to trastuzumab which might be due to modulation of some vital signaling elements such as Notch1 and Pin1. In this study, we were aimed to investigate whether the cross talk between pin1 and Notch1 has a role in this event. Our results indicated that the expression level of Pin1 in resistant SKBR3 cells increased by about twofold relative to sensitive SKBR3 cells...
October 21, 2016: Apoptosis: An International Journal on Programmed Cell Death
https://www.readbyqxmd.com/read/27760204/fine-tuning-of-the-kaposi-s-sarcoma-associated-herpesvirus-life-cycle-in-neighboring-cells-through-the-rta-jag1-notch-pathway
#17
Shasha Li, Hao Hu, Zhiheng He, Deguang Liang, Rui Sun, Ke Lan
Kaposi's sarcoma (KS)-associated herpesvirus (KSHV) is an oncogenic pathogen that displays latent and lytic life cycles. In KS lesions, infiltrated immune cells, secreted viral and/or cellular cytokines, and hypoxia orchestrate a chronic pro-lytic microenvironment that can promote KSHV reactivation. However, only a small subset of viruses spontaneously undergoes lytic replication in this pro-lytic microenvironment while the majority remains in latency. Here, we show that the expression of the Notch ligand JAG1 is induced by KSHV-encoded replication and transcription activator (RTA) during reactivation...
October 2016: PLoS Pathogens
https://www.readbyqxmd.com/read/27753144/melatonin-rescues-cardiac-thioredoxin-system-during-ischemia-reperfusion-injury-in-acute-hyperglycemic-state-by-restoring-notch1-hes1-akt-signaling-in-a-membrane-receptor-dependent-manner
#18
Liming Yu, Chongxi Fan, Zhi Li, Jian Zhang, Xiaodong Xue, Yinli Xu, Guolong Zhao, Yang Yang, Huishan Wang
Stress hyperglycemia is commonly observed in patients suffering from ischemic heart disease. It not only worsens cardiovascular prognosis but also attenuates the efficacies of various cardioprotective agents. This study aimed to investigate the protective effect of melatonin against myocardial ischemia-reperfusion (MI/R) injury in acute hyperglycemic state with a focus on Notch1/Hes1/Akt signaling and intracellular thioredoxin (Trx) system. Sprague-Dawley rats were subjected to MI/R surgery and high glucose (HG, 500 g/L) infusion (4 ml/kg/h) to induce temporary hyperglycemia...
October 18, 2016: Journal of Pineal Research
https://www.readbyqxmd.com/read/27720999/neurotrophin-3-promotes-proliferation-and-cholinergic-neuronal-differentiation-of-bone-marrow-derived-neural-stem-cells-via-notch-signaling-pathway
#19
Yu-Hui Yan, Shao-Heng Li, Zhong Gao, Sa-Feng Zou, Hong-Yan Li, Zhen-Yu Tao, Jie Song, Jing-Xian Yang
AIMS: Recently, the potential for neural stem cells (NSCs) to be used in the treatment of Alzheimer's disease (AD) has been reported; however, the therapeutic effects are modest by virtue of the low neural differentiation rate. In our study, we transfected bone marrow-derived NSCs (BM-NSCs) with Neurotrophin-3 (NT-3), a superactive neurotrophic factor that promotes neuronal survival, differentiation, and migration of neuronal cells, to investigate the effects of NT-3 gene overexpression on the proliferation and differentiation into cholinergic neuron of BM-NSCs in vitro and its possible molecular mechanism...
October 6, 2016: Life Sciences
https://www.readbyqxmd.com/read/27713115/a-comprehensive-transcriptomic-analysis-of-differentiating-embryonic-stem-cells-in-response-to-the-overexpression-of-mesogenin-1
#20
Dahai Liu, Qiang Zhang, Hong Zhang, Ling Tang, Wei Li, Dongming Zhang, Guoying Wu, Shoudong Ye, Qian Ban, Kan He
The mutation of somitogenesis protein Mesogenin 1 (Msgn1) has been widely used to study the direct link between somitogenesis and the development of an embryo. Several studies have used gene expression profiling of somitogenesis to identify the key genes in the process, but few have focused on the pathways involved and the coexpression patterns of associated pathways. Here we employed time-course microarray datasets of differentiating embryonic stem cells by overexpressing the transcription factor Msgn1 from the public database library of Gene Expression Omnibus (GEO)...
October 6, 2016: Aging
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