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https://www.readbyqxmd.com/read/29321020/meta-analysis-of-human-gene-expression-in-response-to-mycobacterium-tuberculosis-infection-reveals-potential-therapeutic-targets
#1
Zhang Wang, Seda Arat, Michal Magid-Slav, James R Brown
BACKGROUND: With the global emergence of multi-drug resistant strains of Mycobacterium tuberculosis, new strategies to treat tuberculosis are urgently needed such as therapeutics targeting potential human host factors. RESULTS: Here we performed a statistical meta-analysis of human gene expression in response to both latent and active pulmonary tuberculosis infections from nine published datasets. We found 1655 genes that were significantly differentially expressed during active tuberculosis infection...
January 10, 2018: BMC Systems Biology
https://www.readbyqxmd.com/read/29303993/endolysosomal-cation-channels-and-cancer-a-link-with-great-potential
#2
REVIEW
Christian Grimm, Karin Bartel, Angelika M Vollmar, Martin Biel
The endolysosomal system (ES) consists of lysosomes; early, late, and recycling endosomes; and autophagosomes. It is a key regulator not only of macromolecule degradation and recycling, plasma membrane repair, homeostasis, and lipid storage, but also of antigen presentation, immune defense, cell motility, cell death signaling, tumor growth, and cancer progression. In addition, it plays a critical role in autophagy, and the autophagy-lysosome pathway is intimately associated with the hallmarks of cancer, such as escaping cell death pathways, evading immune surveillance, and deregulating metabolism...
January 5, 2018: Pharmaceuticals
https://www.readbyqxmd.com/read/29287955/remodeling-of-ca2-signaling-in-cancer-regulation-of-inositol-1-4-5-trisphosphate-receptors-through-oncogenes-and-tumor-suppressors
#3
REVIEW
Hideaki Ando, Katsuhiro Kawaai, Benjamin Bonneau, Katsuhiko Mikoshiba
The calcium ion (Ca2+) is a ubiquitous intracellular signaling molecule that regulates diverse physiological and pathological processes, including cancer. Increasing evidence indicates that oncogenes and tumor suppressors regulate the Ca2+ transport systems. Inositol 1,4,5-trisphosphate (IP3) receptors (IP3Rs) are IP3-activated Ca2+ release channels located on the endoplasmic reticulum (ER). They play pivotal roles in the regulation of cell death and survival by controlling Ca2+ transfer from the ER to mitochondria through mitochondria-associated ER membranes (MAMs)...
December 20, 2017: Advances in Biological Regulation
https://www.readbyqxmd.com/read/29286249/destabilization-of-dna-g-quadruplexes-by-chemical-environment-changes-during-tumor-progression-facilitates-transcription
#4
Hisae Tateishi-Karimata, Keiko Kawauchi, Naoki Sugimoto
DNA G-quadruplex formation is highly responsive to surrounding conditions, particularly K+ concentration. Malignant cancer cells have a much lower K+ concentration than normal cells because of overexpression of a K+ channel; thus, G-quadruplexes may be unstable in cancer cells. Here, we physicochemically investigated how changes in intracellular chemical environments in vitro and in cells influence G-quadruplex formation and transcription during tumor progression. In vitro, the stable G-quadruplex formation inhibits transcription in a solution containing 150 mM KCl (normal condition)...
December 29, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/29259786/necessity-to-evaluate-pi3k-akt-signalling-pathway-in-proarrhythmia
#5
REVIEW
Martin Ezeani, Sunday Elom
The incidence of QT prolongation and torsades de pointes is on the rise due to the use of cardiovascular and non-cardiovascular drugs. Robust efforts have been made and are still ongoing to understand the underlying mechanisms that can enhance or prevent the development of drug-induced proarrhythmia. A caveat in the use of antiarrhythmic drugs is the ability to obtain safe action potential prolongation therapeutic effects, through IKr blockade. This remains as yet completely unachievable, as blockers of the potassium channel have not provided complete safe measures...
2017: Open Heart
https://www.readbyqxmd.com/read/29258289/opening-of-the-human-epithelial-calcium-channel-trpv6
#6
Luke L McGoldrick, Appu K Singh, Kei Saotome, Maria V Yelshanskaya, Edward C Twomey, Robert A Grassucci, Alexander I Sobolevsky
Calcium-selective transient receptor potential vanilloid subfamily member 6 (TRPV6) channels play a critical role in calcium uptake in epithelial tissues. Altered TRPV6 expression is associated with a variety of human diseases, including cancers. TRPV6 channels are constitutively active and their open probability depends on the lipidic composition of the membrane in which they reside; it increases substantially in the presence of phosphatidylinositol 4,5-bisphosphate. Crystal structures of detergent-solubilized rat TRPV6 in the closed state have previously been solved...
December 20, 2017: Nature
https://www.readbyqxmd.com/read/29193257/fundamental-structural-and-functional-properties-of-aquaporin-ion-channels-found-across-the-kingdoms-of-life
#7
Mohamad Kourghi, Jinxin V Pei, Michael L De Ieso, Saeed Nourmohammadi, Pak Hin Chow, Andrea J Yool
Aquaporin (AQP) channels in the Major Intrinsic Protein (MIP) family are known to facilitate transmembrane water fluxes in prokaryotes and eukaryotes. Some classes of AQPs also conduct ions, glycerol, urea, CO2 , nitric oxide, and other small solutes. Ion channel activity has been demonstrated for mammalian AQPs 0, 1, 6, Drosophila big brain (BIB), soybean nodulin 26, and rockcress AtPIP2;1. More classes are likely to be discovered. Newly identified blockers are providing essential tools for establishing physiological roles of some of the AQP dual water and ion channels...
November 29, 2017: Clinical and Experimental Pharmacology & Physiology
https://www.readbyqxmd.com/read/29174396/plc%C3%AE-1-potential-arbitrator-of-cancer-progression
#8
REVIEW
Hyun-Jun Jang, Pann-Ghill Suh, Yu Jin Lee, Kyeong Jin Shin, Lucio Cocco, Young Chan Chae
Phospholipase C (PLC) is an essential mediator of cellular signaling. PLC regulates multiple cellular processes by generating bioactive molecules such as inositol-1,4,5-triphosphate (IP3) and diacylglycerol (DAG). These products propagate and regulate cellular signaling via calcium (Ca2+) mobilization and activation of protein kinase C (PKC), other kinases, and ion channels. PLCγ1, one of the primary subtypes of PLC, is directly activated by membrane receptors, including receptor tyrosine kinases (RTKs), and adhesion receptors such as integrin...
November 8, 2017: Advances in Biological Regulation
https://www.readbyqxmd.com/read/29163676/effects-of-calcium-channel-on-ovarian-cancer-cells
#9
Chunyun Zhang, Hailing Li
The aim of the present study was to examine the effects of calcium channel protein on ovarian cancer cells. The expression of calcium channel protein in normal ovarian cells and ovarian cancer cells was detected by fluorescence quantitative PCR. Subsequently, the ovarian cancer cells were added to calcium channel protein activator media at various concentrations of 0, 1, 4, 8, 12, 16 and 20 mmol/l. The concentration of calcium ion in different samples was produced, and using an MTT assay, ovarian cancer cell activity in various samples was detected...
December 2017: Oncology Letters
https://www.readbyqxmd.com/read/29155210/transition-from-androgenic-to-neurosteroidal-action-of-5%C3%AE-androstane-3%C3%AE-17%C3%AE-diol-through-the-type-a-%C3%AE-aminobutyric-acid-receptor-in-prostate-cancer-progression
#10
Ding Xia, Doan V Lai, Weijuan Wu, Zachary D Webb, Qing Yang, Lichao Zhao, Zhongxin Yu, Jessica E Thorpe, Bryan C Disch, Michael A Ihnat, Muralidharan Jayaraman, Danny N Dhanasekaran, Kelly L Stratton, Michael S Cookson, Kar-Ming Fung, Hsueh-Kung Lin
Androgen ablation is the standard of care prescribed to patients with advanced or metastatic prostate cancer (PCa) to slow down disease progression. Unfortunately, a majority of PCa patients under androgen ablation progress to castration-resistant prostate cancer (CRPC). Several mechanisms including alternative intra-prostatic androgen production and androgen-independent androgen receptor (AR) activation have been proposed for CRPC progression. Aldo-keto reductase family 1 member C3 (AKR1C3), a multi-functional steroid metabolizing enzyme, is specifically expressed in the cytoplasm of PCa cells; and positive immunoreactivity of the type A γ-aminobutyric acid receptor (GABAAR), an ionotropic receptor and ligand-gated ion channel, is detected on the membrane of PCa cells...
November 15, 2017: Journal of Steroid Biochemistry and Molecular Biology
https://www.readbyqxmd.com/read/29150934/the-current-status-and-perspectives-regarding-the-clinical-implication-of-intracellular-calcium-in-breast-cancer
#11
REVIEW
Amir Tajbakhsh, Alireza Pasdar, Mehdi Rezaee, Mostafa Fazeli, Saman Soleimanpour, Seyed Mahdi Hassanian, Zahra FarshchiyanYazdi, Tayebe Younesi Rad, Gordon A Ferns, Amir Avan
Calcium ions (Ca2+ ) act as second messengers in intracellular signaling. Ca2+ pumps, channels, sensors, and calcium binding proteins, regulate the concentrations of intracellular Ca2+ as a key regulator of important cellular processes such as gene expression, proliferation, differentiation, DNA repair, apoptosis, metastasis, and hormone secretion. Intracellular Ca2+ also influences the functions of several organelles, that include: the endoplasmic reticulum, mitochondria, the Golgi, and cell membrane both in normal and breast cancer cells...
November 18, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/29137386/mitochondrial-calcium-uniporter-as-a-target-of-microrna-340-and-promoter-of-metastasis-via-enhancing-the-warburg-effect
#12
Changhui Yu, Yuhao Wang, Jiawen Peng, Qiang Shen, Mimi Chen, Wei Tang, Xiumei Li, Chunqing Cai, Bin Wang, Shaoxi Cai, Xiaojing Meng, Fei Zou
Background: A shift from oxygen phosphorylation to aerobic glycolysis was known as the Warburg effect and a characteristic of cancer cell metabolism facilitating metastasis. Mitochondrial calcium uniporter (MCU), a key ion channel that mediates Ca(2+) uptake into mitochondria, was found to promote cancer progression and metastasis. However, its explicit role in shifting metabolism of breast cancer cells has not been defined. Methods: We evaluated MCU overexpression or knock-down on migration, invasion and glucose metabolismin breast cancer cells...
October 13, 2017: Oncotarget
https://www.readbyqxmd.com/read/29131336/molecular-function-of-%C3%AE-7-nicotinic-receptors-as-drug-targets
#13
Cecilia Bouzat, Matías Lasala, Beatriz Elizabeth Nielsen, Jeremías Corradi, María Del Carmen Esandi
Nicotinic acetylcholine receptors (nAChRs) are pentameric ligand-gated ion channels involved in many physiological and pathological processes. In vertebrates, there are seventeen different nAChR subunits that combine to yield a variety of receptors with different pharmacology, function, and localization. The homomeric α7 receptor is one of the most abundant nAChRs in the nervous system and it is also present in non-neuronal cells. It plays important roles in cognition, memory, pain, neuroprotection, and inflammation...
November 13, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/29117147/the-na-k-atpase-%C3%AE-subunit-isoforms-expression-in-glioblastoma-multiforme-moonlighting-roles
#14
Deborah Rotoli, Mariana-Mayela Cejas, María-Del-Carmen Maeso, Natalia-Dolores Pérez-Rodríguez, Manuel Morales, Julio Ávila, Ali Mobasheri, Pablo Martín-Vasallo
Glioblastoma multiforme (GBM) is the most common form of malignant glioma. Recent studies point out that gliomas exploit ion channels and transporters, including Na, K-ATPase, to sustain their singular growth and invasion as they invade the brain parenchyma. Moreover, the different isoforms of the β-subunit of Na, K-ATPase have been implicated in regulating cellular dynamics, particularly during cancer progression. The aim of this study was to determine the Na, K-ATPase β subunit isoform subcellular expression patterns in all cell types responsible for microenvironment heterogeneity of GBM using immunohistochemical analysis...
November 8, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29115578/characterization-of-prostate-cancer-cell-progression-in-zebrafish-xenograft-model
#15
Wei Xu, Brittany A Foster, Mackenzie Richards, Kenneth R Bondioli, Girish Shah, Christopher C Green
Early diagnosis of prostate cancer (PCa) is critical for the application of efficient treatment to PCa patients. However, the majority of PCas remains indolent from several months to several years before malignancy. Current diagnosis methods have limitations in their reliability and are inefficient in time cost. Thus, an efficient in vivo PCa cell xenograft model is highly desired for diagnostic studies in PCas. In the present study we present a standardized procedure to create a PCa cell xenograft model using zebrafish (Danio rerio) as the host...
January 2018: International Journal of Oncology
https://www.readbyqxmd.com/read/29113105/the-molecular-and-phenotypic-basis-of-the-glioma-invasive-perivascular-niche
#16
REVIEW
Mohammed Diksin, Stuart J Smith, Ruman Rahman
Gliomas are devastating brain cancers that have poor prognostic outcomes for their patients. Short overall patient survival is due to a lack of durable, efficacious treatment options. Such therapeutic difficulties exist, in part, due to several glioma survival adaptations and mechanisms, which allow glioma cells to repurpose paracrine signalling pathways and ion channels within discreet microenvironments. These Darwinian adaptations facilitate invasion into brain parenchyma and perivascular space or promote evasion from anti-cancer defence mechanisms...
November 6, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29108994/nf%C3%AE%C2%BAb-mediated-elevation-of-kcnj11-promotes-tumor-progression-of-hepatocellular-carcinoma-through-interaction-of-lactate-dehydrogenase-a
#17
Ke Zhang, Ling Mu, Ming-Cui Ding, Rui Xu, Zhao-Jun Ding, Jun Liang
It has been well documented that changes in ion fluxes across cellular membranes is fundamental in maintaining cellular homeostasis. Dysregulation and/or malfunction of ion channels are critical events in the pathogenesis of diverse diseases, including cancers. In this study, we focused on the study of K(+) channels in hepatocellular carcinoma (HCC). By data mining TCGA cohort, the expression of 27 K(+) channels was investigated and KCNJ11 was identified as a key dysregulated K(+) channels in HCC. KCNJ11 was differentially expressed in HCC and predicted a poor prognosis in HCC patients...
November 3, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29099773/divalent-cations-regulate-the-ion-conductance-properties-of-diverse-classes-of-aquaporins
#18
Mohamad Kourghi, Saeed Nourmohammadi, Jinxin V Pei, Jiaen Qiu, Samantha McGaughey, Stephen D Tyerman, Caitlin S Byrt, Andrea J Yool
Aquaporins (AQPs) are known to facilitate water and solute fluxes across barrier membranes. An increasing number of AQPs are being found to serve as ion channels. Ion and water permeability of selected plant and animal AQPs (plant Arabidopsis thaliana AtPIP2;1, AtPIP2;2, AtPIP2;7, human Homo sapiens HsAQP1, rat Rattus norvegicus RnAQP4, RnAQP5, and fly Drosophilamelanogaster DmBIB) were expressed in Xenopus oocytes and examined in chelator-buffered salines to evaluate the effects of divalent cations (Ca(2+), Mg(2+), Ba(2+) and Cd(2+)) on ionic conductances...
November 3, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29097308/analysis-of-natural-product-regulation-of-opioid-receptors-in-the-treatment-of-human-disease
#19
REVIEW
S Badal, S Turfus, R Rajnarayanan, C Wilson-Clarke, S L Sandiford
Opioid receptors (ORs), μOR, δOR, κOR and ORL1 mediate numerous signaling cascades, most importantly, through the modulation of ion channels. Research demonstrates the role of OR mediated signal transduction in treating pain, cancer, neurodegenerative disorders and cardiac insults. Yet, the primary application of drugs that modulate ORs is analgesia. Current opioids like morphine that are mainly μOR orthosteric agonists attract many undesirable side-effects (constipation, urinary retention, respiratory depression and hypotension) and the existing modus operandi against these is the inclusion of a μOR antagonist (for example...
October 30, 2017: Pharmacology & Therapeutics
https://www.readbyqxmd.com/read/29081061/zoledronic-acid-bevacizumab-and-dexamethasone-induced-apoptosis-mitochondrial-oxidative-stress-and-calcium-signaling-are-decreased-in-human-osteoblast-like-cell-line-by-selenium-treatment
#20
Tayfun Yazıcı, Gülperi Koçer, Mustafa Nazıroğlu, İshak Suat Övey, Ahmi Öz
Increased intracellular free calcium ion (Ca2+) concentration induces excessive oxidative stress and apoptosis. Medical procedures such as zoledronic acid (Zol), bevacizumab (Bev), and dexamethasone (Dex) are usually used in the treatment of bone diseases (osteoporosis, Paget's disease, etc.) and to prevent metastasis in the bone although the procedures induce osteonecrosis of the jaw through excessive production of reactive oxygen species (ROS). Recently, we observed regulator roles of selenium (Se) on apoptosis and Ca2+ entry through transient receptor potential vanilloid 1 (TRPV1) channels in the cancer cell lines...
October 28, 2017: Biological Trace Element Research
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