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https://www.readbyqxmd.com/read/28526201/viral-exploitation-of-the-mek-erk-pathway-a-tale-of-vaccinia-virus-and-other-viruses
#1
REVIEW
Cláudio A Bonjardim
The VACV replication cycle is remarkable in the sense that it is performed entirely in the cytoplasmic compartment of vertebrate cells, due to its capability to encode enzymes required either for regulating the macromolecular precursor pool or the biosynthetic processes. Although remarkable, this gene repertoire is not sufficient to confer the status of a free-living microorganism to the virus, and, consequently, the virus relies heavily on the host to successfully generate its progeny. During the complex virus-host interaction, viruses must deal not only with the host pathways to accomplish their temporal demands but also with pathways that counteract viral infection, including the inflammatory, innate and acquired immune responses...
July 2017: Virology
https://www.readbyqxmd.com/read/28525300/regulation-of-cell-polarity-in-motility-and-cell-division-in-myxococcus-xanthus
#2
Dominik Schumacher, Lotte Søgaard-Andersen
Rod-shaped Myxococcus xanthus cells are polarized with proteins asymmetrically localizing to specific positions. This spatial organization is important for regulation of motility and cell division and changes over time. Dedicated protein modules regulate motility independent of the cell cycle, and cell division dependent on the cell cycle. For motility, a leading-lagging cell polarity is established that is inverted during cellular reversals. Establishment and inversion of this polarity are regulated hierarchically by interfacing protein modules that sort polarized motility proteins to the correct cell poles or cause their relocation between cell poles during reversals akin to a spatial toggle switch...
May 19, 2017: Annual Review of Microbiology
https://www.readbyqxmd.com/read/28524727/e-cadherin-%C3%AE-catenin-complex-a-target-for-anticancer-and-antimetastasis-plants-plant-derived-compounds
#3
Majid Tafrihi, Roohollah Nakhaei Sistani
Plants reputed to have cancer-inhibiting potential and putative active components derived from those plants have emerged as an exciting new field in cancer study. Some of these compounds have cancer-inhibiting potential in different clinical staging levels, especially metastasis. A few of them which stabilize cell-cell adhesions are controversial topics. This review article introduces some effective herbal compounds that target E-cadherin/β-catenin protein complex. In this article, at first, we briefly review the structure and function of E-cadherin and β-catenin proteins, Wnt signaling pathway, and its target genes...
May 19, 2017: Nutrition and Cancer
https://www.readbyqxmd.com/read/28522986/retinal-ganglion-cells-and-circadian-rhythms-in-alzheimer-s-disease-parkinson-s-disease-and-beyond
#4
REVIEW
Chiara La Morgia, Fred N Ross-Cisneros, Alfredo A Sadun, Valerio Carelli
There is increasing awareness on the role played by circadian rhythm abnormalities in neurodegenerative disorders such as Alzheimer's disease (AD) and Parkinson's disease (PD). The characterization of the circadian dysfunction parallels the mounting evidence that the hallmarks of neurodegeneration also affect the retina and frequently lead to loss of retinal ganglion cells (RGCs) and to different degrees of optic neuropathy. In the RGC population, there is the subgroup of cells intrinsically photosensitive and expressing the photopigment melanopsin [melanopsin-containing retinal ganglion cells (mRGCs)], which are now well known to drive the entrainment of circadian rhythms to the light-dark cycles...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28516063/modulation-of-ca-2-signaling-by-anti-apoptotic-b-cell-lymphoma-2-proteins-at-the-endoplasmic-reticulum-mitochondrial-interface
#5
REVIEW
Tim Vervliet, Eva Clerix, Bruno Seitaj, Hristina Ivanova, Giovanni Monaco, Geert Bultynck
Mitochondria are important regulators of cell death and cell survival. Mitochondrial Ca(2+) levels are critically involved in both of these processes. On the one hand, excessive mitochondrial Ca(2+) leads to Ca(2+)-induced mitochondrial outer membrane permeabilization and thus apoptosis. On the other hand, mitochondria need Ca(2+) in order to efficiently fuel the tricarboxylic acid cycle and maintain adequate mitochondrial bioenergetics. For obtaining this Ca(2+), the mitochondria are largely dependent on close contact sites with the endoplasmic reticulum (ER), the so-called mitochondria-associated ER membranes...
2017: Frontiers in Oncology
https://www.readbyqxmd.com/read/28516062/endoplasmic-reticulum-mitochondrial-ca-2-fluxes-underlying-cancer-cell-survival
#6
REVIEW
Hristina Ivanova, Martijn Kerkhofs, Rita M La Rovere, Geert Bultynck
Calcium ions (Ca(2+)) are crucial, ubiquitous, intracellular second messengers required for functional mitochondrial metabolism during uncontrolled proliferation of cancer cells. The mitochondria and the endoplasmic reticulum (ER) are connected via "mitochondria-associated ER membranes" (MAMs) where ER-mitochondria Ca(2+) transfer occurs, impacting the mitochondrial biology related to several aspects of cellular survival, autophagy, metabolism, cell death sensitivity, and metastasis, all cancer hallmarks. Cancer cells appear addicted to these constitutive ER-mitochondrial Ca(2+) fluxes for their survival, since they drive the tricarboxylic acid cycle and the production of mitochondrial substrates needed for nucleoside synthesis and proper cell cycle progression...
2017: Frontiers in Oncology
https://www.readbyqxmd.com/read/28514196/interactions-between-ns1-of-influenza-a-viruses-and-interferon-%C3%AE-%C3%AE-determinants-for-vaccine-development
#7
Ben X Wang, Eleanor N Fish
Influenza A viruses (IAVs) cause mild to severe infections in humans with considerable socioeconomic and global health consequences. The host interferon (IFN)-α/β response, critical as the first line of defense against foreign pathogens, is induced upon detection of IAV genomic RNA in infected cells by host innate pattern recognition receptors. IFN-α/β production and subsequent activation of cell signaling result in the expression of antiviral IFN-stimulated genes whose products target various stages of the IAV life cycle to inhibit viral replication and the spread of infection and establish an antiviral state...
May 17, 2017: Journal of Interferon & Cytokine Research
https://www.readbyqxmd.com/read/28513565/epidermal-growth-factor-receptor-cell-proliferation-signaling-pathways
#8
REVIEW
Ping Wee, Zhixiang Wang
The epidermal growth factor receptor (EGFR) is a receptor tyrosine kinase that is commonly upregulated in cancers such as in non-small-cell lung cancer, metastatic colorectal cancer, glioblastoma, head and neck cancer, pancreatic cancer, and breast cancer. Various mechanisms mediate the upregulation of EGFR activity, including common mutations and truncations to its extracellular domain, such as in the EGFRvIII truncations, as well as to its kinase domain, such as the L858R and T790M mutations, or the exon 19 truncation...
May 17, 2017: Cancers
https://www.readbyqxmd.com/read/28512351/non-homologous-dna-end-joining-and-alternative-pathways-to-double-strand-break-repair
#9
REVIEW
Howard H Y Chang, Nicholas R Pannunzio, Noritaka Adachi, Michael R Lieber
DNA double-strand breaks (DSBs) are the most dangerous type of DNA damage because they can result in the loss of large chromosomal regions. In all mammalian cells, DSBs that occur throughout the cell cycle are repaired predominantly by the non-homologous DNA end joining (NHEJ) pathway. Defects in NHEJ result in sensitivity to ionizing radiation and the ablation of lymphocytes. The NHEJ pathway utilizes proteins that recognize, resect, polymerize and ligate the DNA ends in a flexible manner. This flexibility permits NHEJ to function on a wide range of DNA-end configurations, with the resulting repaired DNA junctions often containing mutations...
May 17, 2017: Nature Reviews. Molecular Cell Biology
https://www.readbyqxmd.com/read/28510614/connexin-dependent-intercellular-stress-signaling-in-tissue-homeostasis-and-tumor-development
#10
Jarosław Czyż, Katarzyna Piwowarczyk, Milena Paw, Marcin Luty, Tomasz Wróbel, Jessica Catapano, Zbigniew Madeja, Damian Ryszawy
Cellular stress responses determine tissue development, homeostasis and pathogenesis. Paracrine signaling, exchange of mechanical stimuli and intercellular transfer of small metabolites via connexin-built gap junctional channels are involved in the cellular stress detection and propagation of stress stimuli in multicellular networks. Cellular stress responses are also regulated through the activity of unpaired connexons (hemichannels) and via the intracellular interference of connexins with the cell cycle and pro-apoptotic machinery...
May 17, 2017: Acta Biochimica Polonica
https://www.readbyqxmd.com/read/28510359/isolation-culture-and-cryopreservation-of-sarcocystis-species
#11
S K Verma, D S Lindsay, M E Grigg, J P Dubey
More than 200 valid Sarcocystis species have been described in the parasitological literature. The developmental life cycle in the intermediate host and definitive host has only been described for a few species. Sarcocystis parasites are common pathogens infecting a wide range of animals, including humans, and this unit reviews the methods used for isolating infective stages of the parasite from both definitive and intermediate host(s), as well as methods used to initiate cultures from sporocysts and merozoites and for cryopreservation of various Sarcocystis spp...
May 16, 2017: Current Protocols in Microbiology
https://www.readbyqxmd.com/read/28509806/advances-in-management-of-hepatocellular-carcinoma
#12
Manon Allaire, Jean-Charles Nault
PURPOSE OF REVIEW: Hepatocellular carcinoma (HCC) is one of the leading causes of death by cancer worldwide due to a dismal prognosis. The aim of this review is to summarize the main advances in the pathophysiology and management of HCC. RECENT FINDINGS: Genomic analysis has recently delineated the key signaling pathways aberrantly deregulated in HCC (telomere maintenance, cell cycle gene, Wnt/β-catenin, epigenetic modifier, oxidative stress etc.). Major advances in the clinical care of patients with HCC are helping to refine the diagnosis algorithm and tumor staging...
May 15, 2017: Current Opinion in Oncology
https://www.readbyqxmd.com/read/28508421/subversion-of-host-kinases-a-key-network-in-cellular-signaling-hijacked-by-helicobacter-pylori-caga
#13
REVIEW
Nicole Tegtmeyer, Matthias Neddermann, Carmen Isabell Asche, Steffen Backert
Helicobacter pylori is a paradigm of persistent pathogens and major risk factor for developing severe diseases including adenocarcinoma in the human stomach. An important bacterial factor linked to gastric disease progression is the cag pathogenicity island-encoded type-IV secretion system (T4SS) effector protein CagA. Translocated CagA undergoes tyrosine phosphorylation at EPIYA-motifs and then activates or inactivates multiple host signaling proteins in a phosphorylation-dependent and phosphorylation-independent fashion...
May 15, 2017: Molecular Microbiology
https://www.readbyqxmd.com/read/28508358/degradomics-in-neurotrauma-profiling-traumatic-brain-injury
#14
Hadi Abou-El-Hassan, Fares Sukhon, Edwyn Jeremy Assaf, Hisham Bahmad, Hussein Abou-Abbass, Hussam Jourdi, Firas H Kobeissy
Degradomics has recently emerged as a subdiscipline in the omics era with a focus on characterizing signature breakdown products implicated in various disease processes. Driven by promising experimental findings in cancer, neuroscience, and metabolomic disorders, degradomics has significantly promoted the notion of disease-specific "degradome." A degradome arises from the activation of several proteases that target specific substrates and generate signature protein fragments. Several proteases such as calpains, caspases, cathepsins, and matrix metalloproteinases (MMPs) are involved in the pathogenesis of numerous diseases that disturb the physiologic balance between protein synthesis and protein degradation...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28507517/the-role-of-unfolded-protein-response-and-mitogen-activated-protein-kinase-signaling-in-neurodegenerative-diseases-with-special-focus-on-prion-diseases
#15
REVIEW
Syed Zahid Ali Shah, Deming Zhao, Tariq Hussain, Lifeng Yang
Prion diseases are neurodegenerative pathologies characterized by the accumulation of a protease-resistant form of the cellular prion protein named prion protein scrapie (PrP(Sc)) in the brain. PrP(Sc) accumulation in the endoplasmic reticulum (ER) result in a dysregulated calcium (Ca(2+)) homeostasis and subsequent initiation of unfolded protein response (UPR) leading to neuronal dysfunction and apoptosis. The molecular mechanisms for the transition between adaptation to ER stress and ER stress-induced apoptosis are still unclear...
2017: Frontiers in Aging Neuroscience
https://www.readbyqxmd.com/read/28507195/molecular-signaling-involved-in-entry-and-exit-of-malaria-parasites-from-host-erythrocytes
#16
Shailja Singh, Chetan E Chitnis
During the blood stage, Plasmodium spp. merozoites invade host red blood cells (RBCs), multiply, exit, and reinvade uninfected RBCs in a continuing cycle that is responsible for all the clinical symptoms associated with malaria. Entry into (invasion) and exit from (egress) RBCs are highly regulated processes that are mediated by an array of parasite proteins with specific functional roles. Many of these parasite proteins are stored in specialized apical secretory vesicles, and their timely release is critical for successful invasion and egress...
May 15, 2017: Cold Spring Harbor Perspectives in Medicine
https://www.readbyqxmd.com/read/28506836/a-comprehensive-review-of-metal-induced-cellular-transformation-studies
#17
Qiao Yi Chen, Max Costa
In vitro transformation assays not only serve practical purposes in screening for potential carcinogenic substances in food, drug, and cosmetic industries, but more importantly, they provide a means of understanding the critical biological processes behind in vivo cancer development. In resemblance to cancer cells in vivo, successfully transformed cells display loss of contact inhibition, gain of anchorage independent growth, resistant to proper cell cycle regulation such as apoptosis, faster proliferation rate, potential for cellular invasion, and ability to form tumors in experimental animals...
May 12, 2017: Toxicology and Applied Pharmacology
https://www.readbyqxmd.com/read/28506790/single-particle-labeling-of-rna-virus-in-live-cells
#18
REVIEW
Xiaohui Liu, Ting Ouyang, Hongsheng Ouyang, Linzhu Ren
Real-time and visual tracking of viral infection is crucial for elucidating the infectious and pathogenesis mechanisms. To track the virus successfully, an efficient labeling method is necessary. In this review, we first discuss the practical labeling techniques for virus tracking in live cells. We then describe the current knowledge of interactions between RNA viruses (especially influenza viruses, immunodeficiency viruses, and Flaviviruses) and host cellular structures, obtained using single particle labeling techniques combined with real-time fluorescence microscopy...
May 12, 2017: Virus Research
https://www.readbyqxmd.com/read/28506769/molecular-biomarkers-for-an-early-diagnosis-effective-treatment-and-prognosis-of-colorectal-cancer-current-updates
#19
REVIEW
Amjad Mahasneh, Fawaz Al-Shaheri, Eshraq Jamal
Colorectal cancer (CRC) is the third most prevalent cancer in the world. Globally, it has been estimated that about 1.4 million new cases of colorectal cancer are diagnosed every year. CRC is a multifactorial disease that arises due to genetics as well as epigenetic alterations in a number of oncogenes, tumor suppressor genes, mismatch repair genes, as well as cell cycle regulating genes in colon mucosal cells. These molecular alterations have been considered as potential CRC biomarkers because they can provide the physicians with diagnostic, prognostic and treatment response information...
May 12, 2017: Experimental and Molecular Pathology
https://www.readbyqxmd.com/read/28505105/new-functions-of-apc-c-ubiquitin-ligase-in-the-nervous-system-and-its-role-in-alzheimer-s-disease
#20
REVIEW
Tanja Fuchsberger, Ana Lloret, Jose Viña
The E3 ubiquitin ligase Anaphase Promoting Complex/Cyclosome (APC/C) regulates important processes in cells, such as the cell cycle, by targeting a set of substrates for degradation. In the last decade, APC/C has been related to several major functions in the nervous system, including axon guidance, synaptic plasticity, neurogenesis, and neuronal survival. Interestingly, some of the identified APC/C substrates have been related to neurodegenerative diseases. There is an accumulation of some degradation targets of APC/C in Alzheimer's disease (AD) brains, which suggests a dysregulation of the protein complex in the disorder...
May 14, 2017: International Journal of Molecular Sciences
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