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Journal of Molecular Cell Biology

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https://www.readbyqxmd.com/read/28201649/a-ck2-rnf4-interplay-coordinates-non-canonical-sumoylation-and-degradation-of-nuclear-receptor-fxr
#1
Stéphanie Bilodeau, Véronique Caron, Jonathan Gagnon, Alexandre Kuftedjian, André Tremblay
No abstract text is available yet for this article.
February 15, 2017: Journal of Molecular Cell Biology
https://www.readbyqxmd.com/read/28175347/mdm-proteins-critical-regulators-of-embryogenesis-and-homoeostasis
#2
Sydney M Moyer, Connie A Larsson, Guillermina Lozano
No abstract text is available yet for this article.
February 7, 2017: Journal of Molecular Cell Biology
https://www.readbyqxmd.com/read/28130308/the-endocannabinoid-system-no-longer-anonymous-in-the-control-of-nitrergic-signalling
#3
REVIEW
Christopher Lipina, Harinder S Hundal
The endocannabinoid system (ECS) is a key cellular signalling system that has been implicated in the regulation of diverse cellular functions. Importantly, growing evidence suggests that the biological actions of the ECS may, in part, be mediated through its ability to regulate the production and/or release of nitric oxide, a ubiquitous bioactive molecule, which functions as a versatile signalling intermediate. Herein, we review and discuss evidence pertaining to ECS-mediated regulation of nitric oxide production, as well as the involvement of reactive nitrogen species in regulating ECS-induced signal transduction by highlighting emerging work supporting nitrergic modulation of ECS function...
January 27, 2017: Journal of Molecular Cell Biology
https://www.readbyqxmd.com/read/28130307/p53-and-mdm2-their-yin-yang-intimacy
#4
EDITORIAL
Hua Lu
No abstract text is available yet for this article.
January 27, 2017: Journal of Molecular Cell Biology
https://www.readbyqxmd.com/read/28096294/mouse-modeling-of-the-mdm2-mdmx-p53-signaling-axis
#5
REVIEW
Nicole R Tackmann, Yanping Zhang
It is evident that p53 activity is critical for tumor prevention and stress response through its transcriptional activation of genes affecting cellular senescence, apoptosis, cellular metabolism, and DNA repair. The regulation of p53 is highly complex, and MDM2 and MDMX are thought to be critical for deciding the fate of p53, both through inhibitory binding and posttranslational modification. Many mouse models have been generated to study the regulation of p53 in vivo, and they have altered our interpretations of how p53 is regulated by MDM2 and MDMX...
January 17, 2017: Journal of Molecular Cell Biology
https://www.readbyqxmd.com/read/28096293/the-role-of-mdm2-and-mdm4-in-breast-cancer-development-and-prevention
#6
REVIEW
Sue Haupt, Reshma Vijayakumaran, Jeffreena Panimaya, Andrew Burgess, Elgene Lim, Ygal Haupt
The major cause of death from breast cancer is not the primary tumour, but relapsing, drug-resistant, metastatic disease. Identifying factors that contribute to aggressive cancer offers important leads for therapy. Inherent defense against carcinogens depends on the individual molecular make-up of each person. Important molecular determinants of these responses are under the control of the mouse double minute (MDM) family: comprised of the proteins MDM2 and MDM4. In normal, healthy adult cells, the MDM family functions to critically regulate measured, cellular responses to stress and subsequent recovery...
January 17, 2017: Journal of Molecular Cell Biology
https://www.readbyqxmd.com/read/28096292/regulation-of-kidney-development-by-the-mdm2-mdm4-p53-axis
#7
REVIEW
Samir El-Dahr, Sylvia Hilliard, Zubaida Saifudeen
While p53 activity is required for tumor suppression, unconstrained p53 activity on the other hand is detrimental to the organism, resulting in inappropriate cellular death or proliferation defects. Unimpeded p53 activity is lethal in the developing embryo, underlining the need for maintaining a tight control on p53 activity during this period. The critical role of the negative regulators of p53, Mdm2 and Mdm4, in vertebrate development came to light by fatal disruption of embryogenesis that was observed with Mdm2 and Mdm4 gene deletions in mice...
January 17, 2017: Journal of Molecular Cell Biology
https://www.readbyqxmd.com/read/28093454/mdm-proteins-critical-regulators-of-embry-ogenesis-and-homeostasis
#8
REVIEW
Sydney M Moyer, Connie A Larsson, Guillermina Lozano
Mdm2 and Mdm4 are negative regulators of the tumor suppressor p53; hence, this relationship is the focus of many cancer related studies. A multitude of experiments across various developmental stages have been conducted to explore the tissue-specific roles of these proteins in the mouse. When Mdm2 or Mdm4 are deleted in the germline or specific tissues, they display different phenotypic defects, some of which lead to embryonic lethality. Mdm2 loss is often more deleterious than loss of its homolog Mdm4 All tissues experience activation of p53 target genes upon loss of Mdm2 or Mdm4; however, the degree to which the p53 pathway is perturbed is highly tissue-specific and does not correlate to the severity of the morphological phenotypes...
January 15, 2017: Journal of Molecular Cell Biology
https://www.readbyqxmd.com/read/28077607/anatomy-of-mdm2-and-mdm4-in-evolution
#9
REVIEW
Ban Xiong Tan, Hoe Peng Liew, Joy S Chua, Farid J Ghadessy, Yaw Sing Tan, David P Lane, Cynthia R Coffill
Mouse double minute (Mdm) genes span an evolutionary timeframe from the ancient eukaryotic placozoa Trichoplax adhaerens to Homo sapiens, implying a significant and possibly conserved cellular role throughout history. Maintenance of DNA integrity and response to DNA damage involve many key regulatory pathways, including precise control over the tumour suppressor protein p53. In most vertebrates, degradation of p53 through proteasomal targeting is primarily mediated by heterodimers of Mdm2 and the Mdm2-related protein Mdm4 (also known as MdmX)...
January 10, 2017: Journal of Molecular Cell Biology
https://www.readbyqxmd.com/read/28069666/negative-auto-regulators-trap-p53-in-their-web
#10
REVIEW
Xiang Zhou, Bo Cao, Hua Lu
The transcriptional factor p53 activates the expression of a myriad of target genes involving a complicated signaling network, resulting in various cellular outcomes, such as growth arrest, senescence, apoptosis, and metabolic changes, and leading to consequent suppression of tumor growth and progression. Because of the profoundly adverse effect of p53 on growth and proliferation of cancer cells, several feedback mechanisms have been employed by the cells to constrain p53 activity. Two major antagonists MDM2 and MDMX (the long forms) are transcriptionally induced by p53, but in return block p53 activity, forming a negative feedback circuit and rendering chemoresistance of several cancer cells...
January 9, 2017: Journal of Molecular Cell Biology
https://www.readbyqxmd.com/read/27932485/axonal-micrornas-localization-function-and-regulatory-mechanism-during-axon-development
#11
REVIEW
Bin Wang, Lan Bao
Subcellular localization and translation of messenger RNAs are essential for the regulation of neuronal development and synaptic function. As post-transcriptional regulators, microRNAs (miRNAs) have been emerging as central players in the development and maturation of the nervous system. Recent discoveries reveal the critical functions of miRNAs in the axon of neurons via multiple pathways of molecular regulation. Here, we introduce methods for isolating axonal miRNAs and review recent findings on the localization and function as well as regulatory mechanism of axonal miRNAs during axon development...
December 8, 2016: Journal of Molecular Cell Biology
https://www.readbyqxmd.com/read/27932484/role-of-mdm2-and-mdmx-in-dna-repair
#12
REVIEW
Christine M Eischen
Mdm2 and Mdmx are critical regulators of the p53 tumour suppressor and are overexpressed in many human malignancies. However, in recent years, their impact on genome instability was shown to be at least, in part, independent of p53. Both Mdm2 and Mdmx inhibit DNA break repair through their association with the Mre11/Rad50/Nbs1 DNA repair complex. Recent evidence indicates that harnessing Mdm2 and/or Mdmx-mediated inhibition of DNA break repair in cancer cells could provide a therapeutic opportunity, particularly for those malignancies that have lost functional p53...
December 8, 2016: Journal of Molecular Cell Biology
https://www.readbyqxmd.com/read/27932483/roles-and-regulations-of-the-ets-transcription-factor-elf4-mef
#13
REVIEW
Mary Ann Suico, Tsuyoshi Shuto, Hirofumi Kai
Most E26 transformation-specific (ETS) transcription factors are involved in the pathogenesis and progression of cancer. This is in part due to the roles of ETS transcription factors in basic biological processes such as growth, proliferation, and differentiation, and also because of their regulatory functions that have physiological relevance in tumorigenesis, immunity, and basal cellular homoeostasis. A member of the E74-like factor (ELF) subfamily of the ETS transcription factor family-myeloid elf-1-like factor (MEF), designated as ELF4-has been shown to be critically involved in immune response and signalling, osteogenesis, adipogenesis, cancer, and stem cell quiescence...
December 8, 2016: Journal of Molecular Cell Biology
https://www.readbyqxmd.com/read/27927749/modulation-of-the-p53-mdm2-interplay-by-hausp-inhibitors
#14
REVIEW
Omid Tavana, Wei Gu
It is well established that both p53 and MDM2 are short-lived proteins whose stabilities are tightly controlled through ubiquitination-mediated degradation. Although numerous studies indicate that the MDM2 E3 ligase activity, as well as the protein-protein interaction between p53 and MDM2, is the major focus for this regulation, emerging evidence suggests that the deubiquitinase herpesvirus-associated ubiquitin-specific protease (HAUSP, also known as USP7) plays a critical role. Furthermore, HAUSP inhibition elevates p53 stability and might be beneficial for therapeutic purposes...
December 6, 2016: Journal of Molecular Cell Biology
https://www.readbyqxmd.com/read/27913571/snord126-promotes-hcc-and-crc-cell-growth-by-activating-the-pi3k-akt-pathway-through-fgfr2
#15
Xianlong Fang, Dongmei Yang, Hongping Luo, Shuai Wu, Wenjie Dong, Jing Xiao, Sujing Yuan, Aimin Ni, Kang-Jian Zhang, Xin-Yuan Liu, Liang Chu
Small nucleolar RNA (snoRNA) dysfunctions have been associated with cancer development. SNORD126 is an orphan C/D box snoRNA that is encoded within introns 5-6 of its host gene, cyclin B1-interacting protein 1 (CCNB1IP1) The cancer-associated molecular mechanisms triggered by SNORD126 are not fully understood. Here, we demonstrate that SNORD126 is highly expressed in hepatocellular carcinoma (HCC) and colorectal cancer (CRC) patient samples. SNORD126 increased Huh-7 and SW480 cell growth and tumorigenicity in nude mice...
December 2, 2016: Journal of Molecular Cell Biology
https://www.readbyqxmd.com/read/27856769/new-insights-into-complex-diseases
#16
EDITORIAL
Jiarui Wu
No abstract text is available yet for this article.
December 2016: Journal of Molecular Cell Biology
https://www.readbyqxmd.com/read/27436752/prostaglandin-e2-receptor-ep3-regulates-both-adipogenesis-and-lipolysis-in-mouse-white-adipose-tissue
#17
Hu Xu, Jia-Lin Fu, Yi-Fei Miao, Chun-Jiong Wang, Qi-Fei Han, Sha Li, Shi-Zheng Huang, Sheng-Nan Du, Yu-Xiang Qiu, Ji-Chun Yang, Jan-Åke Gustafsson, Richard M Breyer, Feng Zheng, Nan-Ping Wang, Xiao-Yan Zhang, You-Fei Guan
Among the four prostaglandin E2 receptors, EP3 receptor is the one most abundantly expressed in white adipose tissue (WAT). The mouse EP3 gene gives rise to three isoforms, namely EP3α, EP3β, and EP3γ, which differ only at their C-terminal tails. To date, functions of EP3 receptor and its isoforms in WAT remain incompletely characterized. In this study, we found that the expression of all EP3 isoforms were downregulated in WAT of both db/db and high-fat diet-induced obese mice. Genetic ablation of three EP3 receptor isoforms (EP3(-/-) mice) or EP3α and EP3γ isoforms with EP3β intact (EP3β mice) led to an obese phenotype with increased food intake, decreased motor activity, reduced insulin sensitivity, and elevated serum triglycerides...
December 2016: Journal of Molecular Cell Biology
https://www.readbyqxmd.com/read/27190311/a-camp-and-creb-mediated-feed-forward-mechanism-regulates-gsk3%C3%AE-in-polycystic-kidney-disease
#18
Vijayakumar R Kakade, Shixin Tao, Madhumitha Rajagopal, Xia Zhou, Xiaogang Li, Alan S L Yu, James P Calvet, Pankaj Pandey, Reena Rao
Glycogen synthase kinase 3β (GSK3β), a serine/threonine protein kinase, is commonly known to be regulated at the level of its activity. However, in some diseases including polycystic kidney disease (PKD), GSK3β expression is increased and plays a pathophysiological role. The current studies aimed to determine the mechanism for the increased GSK3β expression in PKD and its significance to disease progression. In mouse models of PKD, increases in renal GSK3β corresponded with increases in renal cAMP levels and disease progression...
December 2016: Journal of Molecular Cell Biology
https://www.readbyqxmd.com/read/27927750/mdm2-as-a-chromatin-modifier
#19
REVIEW
Magdalena Wienken, Ute M Moll, Matthias Dobbelstein
Mdm2 is the key negative regulator of the tumour suppressor p53, making it an attractive target for anti-cancer drug design. We recently identified a new role of Mdm2 in gene repression through its direct interaction with several proteins of the polycomb group (PcG) family. PcG proteins form polycomb repressive complexes PRC1 and PRC2. PRC2 (via EZH2) mediates histone 3 lysine 27 (H3K27) trimethylation, and PRC1 (via RING1B) mediates histone 2A lysine 119 (H2AK119) monoubiquitination. Both PRCs mostly support a compact and transcriptionally silent chromatin structure...
November 9, 2016: Journal of Molecular Cell Biology
https://www.readbyqxmd.com/read/27927748/axl-receptor-signalling-suppresses-p53-in-melanoma-through-stabilization-of-the-mdmx-mdm2-complex
#20
Anna de Polo, Zhongling Luo, Casimiro Gerarduzzi, Xiang Chen, John B Little, Zhi-Min Yuan
Deregulation of the tyrosine kinase signalling is often associated with tumour progression and drug resistance, but its underlying mechanisms are only partly understood. In this study, we investigated the effects of the receptor tyrosine kinase AXL on the stability of the MDMX-MDM2 heterocomplex and the activity of p53 in melanoma cells. Our data demonstrated that AXL overexpression or activation through growth arrest-specific 6 (Gas6) ligand stimulation increases MDMX and MDM2 protein levels and decreases p53 activity...
November 9, 2016: Journal of Molecular Cell Biology
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