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https://www.readbyqxmd.com/read/28927264/comparative-interactomes-of-vrk1-and-vrk3-with-their-distinct-roles-in-the-cell-cycle-of-liver-cancer
#1
Namgyu Lee, Dae-Kyum Kim, Seung Hyun Han, Hye Guk Ryu, Sung Jin Park, Kyong-Tai Kim, Kwan Yong Choi
Vaccinia-related kinase 1 (VRK1) and VRK3 are members of the VRK family of serine/threonine kinases and are principally localized in the nucleus. Despite the crucial roles of VRK1/ VRK3 in physiology and disease, the molecular and functional interactions of VRK1/VRK3 are poorly understood. Here, we identified over 200 unreported VRK1/VRK3-interacting candidate proteins by affinity purification and LC-MS/MS. The networks of VRK1 and VRK3 interactomes were found to be associated with important biological processes such as the cell cycle, DNA repair, chromatin assembly, and RNA processing...
August 31, 2017: Molecules and Cells
https://www.readbyqxmd.com/read/28927158/regulation-of-htra2-on-wt1-gene-expression-under-imatinib-stimulation-and-its-effects-on-the-cell-biology-of-k562-cells
#2
Lixia Zhang, Yan Li, Xiaoyan Li, Qing Zhang, Shaowei Qiu, Qi Zhang, Min Wang, Haiyan Xing, Qing Rao, Zheng Tian, Kejing Tang, Jianxiang Wang, Yingchang Mi
The aim of the present study was to investigate the regulation of Wilms Tumor 1 (WT1) by serine protease high-temperature requirement protein A2 (HtrA2), a member of the Htr family, in K562 cells. In addition, the study aimed to observe the effect of this regulation on cell biological functions and its associated mechanisms. Expression of WT1 and HtrA2 mRNA, and proteins following imatinib and the HtrA2 inhibitor 5-[5-(2-nitrophenyl) furfuryl iodine]-1, 3-diphenyl-2-thiobarbituric acid (UCF-101) treatment was detected with reverse transcription-quantitative polymerase chain reaction and western blot analysis...
September 2017: Oncology Letters
https://www.readbyqxmd.com/read/28927118/mutations-in-braf-codons-594-and-596-predict-good-prognosis-in-melanoma
#3
Xiaowen Wu, Junya Yan, Jie Dai, Meng Ma, Huan Tang, Jiayi Yu, Tianxiao Xu, Huan Yu, Lu Si, Zhihong Chi, Xinan Sheng, Chuanliang Cui, Yan Kong, Jun Guo
B-Raf proto-oncogene serine/threonine kinase (BRAF) V600E is the most common kinase-activating mutation and is associated with poor prognosis in melanoma. However, the clinical significance of kinase-impairing mutations remains unclear. The present study aimed to analyze kinase-impairing mutations in BRAF codons 594 and 596 in non-Caucasian patients with melanoma and to investigate their possible clinical significance. To detect hotspot mutations, exon 15 of the BRAF gene was amplified using polymerase chain reaction in samples from 1,554 patients with melanoma...
September 2017: Oncology Letters
https://www.readbyqxmd.com/read/28927088/pcdh8-inhibits-glioma-cell-proliferation-by-negatively-regulating-the-akt-gsk3%C3%AE-%C3%AE-catenin-signaling-pathway
#4
Zhenkun Zong, Hui Pang, Rutong Yu, Yunqi Jiao
Protocadherin-8 (PCDH8), a member of the protocadherin superfamily of proteins, is frequently lost in numerous types of cancer. However, the role that PCDH8 serves in human glioma, and the molecular mechanisms underlying this, remain unclear. Data from the present study demonstrated that the expression levels of PCDH8 mRNA and protein were significantly decreased in human glioma tissue compared with normal brain tissue. This suggested that PCDH8 is associated with the development of glioma. Thus, the role of PCDH8 in glioma cell proliferation was investigated by silencing and overexpressing PCDH8 in U251 glioma cells...
September 2017: Oncology Letters
https://www.readbyqxmd.com/read/28927054/methylation-of-stk11-promoter-is-a-risk-factor-for-tumor-stage-and-survival-in-clear-cell-renal-cell-carcinoma
#5
Fufu Zheng, Xiaoxu Yuan, Enjing Chen, Yunlin Ye, Xiaofei Li, Yuping Dai
Inactivation of tumor suppressor gene serine-threonine kinase 11 (STK11) in clear cell renal cell carcinoma (ccRCC) has been demonstrated; however, the mechanism of this inactivation remains to be investigated. To investigate whether epigenetic alteration plays a role in the inactivation of STK11 in RCC, the present study aimed to investigate the methylation status of the STK11 promoter and its association with tumor stage and survival in ccRCC patients. Paraffin-embedded specimens were obtained from 42 ccRCC patients...
September 2017: Oncology Letters
https://www.readbyqxmd.com/read/28927001/a-review-and-database-of-snake-venom-proteomes
#6
REVIEW
Theo Tasoulis, Geoffrey K Isbister
Advances in the last decade combining transcriptomics with established proteomics methods have made possible rapid identification and quantification of protein families in snake venoms. Although over 100 studies have been published, the value of this information is increased when it is collated, allowing rapid assimilation and evaluation of evolutionary trends, geographical variation, and possible medical implications. This review brings together all compositional studies of snake venom proteomes published in the last decade...
September 18, 2017: Toxins
https://www.readbyqxmd.com/read/28926939/kempopeptin-c-a-novel-marine-derived-serine-protease-inhibitor-targeting-invasive-breast-cancer
#7
Fatma H Al-Awadhi, Lilibeth A Salvador, Brian K Law, Valerie J Paul, Hendrik Luesch
Kempopeptin C, a novel chlorinated analogue of kempopeptin B, was discovered from a marine cyanobacterium collected from Kemp Channel in Florida. The structure was elucidated using NMR spectroscopy and mass spectrometry (MS). The presence of the basic Lys residue adjacent to the N-terminus of the 3-amino-6-hydroxy-2-piperidone (Ahp) moiety contributed to its selectivity towards trypsin and related proteases. The antiproteolytic activity of kempopeptin C was evaluated against trypsin, plasmin and matriptase and found to inhibit these enzymes with IC50 values of 0...
September 16, 2017: Marine Drugs
https://www.readbyqxmd.com/read/28926422/two-faces-of-hippo-activate-or-suppress-the-hippo-pathway-in-cancer
#8
Jingwen Cao, Wenlong Huang
The Hippo pathway has generated considerable interest in recent years because of its involvement in several key hallmarks of cancer progression and metastasis. Research on the Hippo signaling pathway in cancer has been used to determine the activity of yes-associated protein (YAP) in tumorigenesis and disease progression. Previous studies have shown that the Hippo pathway can be used as a target to inhibit YAP activity and is a viable treatment for cancer. However, more studies are required to further advance our understanding of the Hippo signaling pathway in cancer...
September 18, 2017: Anti-cancer Drugs
https://www.readbyqxmd.com/read/28925907/atrial-fibrillation-ablation-increases-inflammation-chemokine-modulation-suppresses-activation-of-leukocytes-isolated-after-ablation
#9
Alexandra Lucas, Mohammad Al-Ani, Sriram Ambadapadi, Jordan R Yaron, Donghang Zheng, Adisson Fortunel, Maia Doroton-Guevara, Liying Liu, Sufi Morshed, Jay Fricker, William Miles, Matthew McKillop
AIMS: Atrial fibrillation (AF) ablation is associated with increased circulating markers of inflammation. Innate immune, or inflammation, pathways up-regulate mononuclear cell responses and may increase risk for recurrent arrhythmia. Chemokines and serine protease coagulation pathways both activate innate immune responses. Here, we measured inflammatory markers in peripheral blood samples from patients after cryoballoon and/or radiofrequency pulmonary vein isolation and assessed the capacity for inhibition of chemokine and serine protease pathways to block cell activation...
September 18, 2017: Cardiovascular & Hematological Disorders Drug Targets
https://www.readbyqxmd.com/read/28925864/kinetic-characterization-of-anticarsia-gemmatalis-digestive-serine-proteases-and-the-inhibitory-effect-of-synthetic-peptides
#10
Adriana Patarroyo Vargas, Yaremis Meriño Cabrera, José Cola Zanuncio, Francelina Rocha, Wellington Garcia Campos, Maria Goreti de Almeida Oliveira
The kinetics of Anticarsia gemmatalis Hübner gut serine proteases with tripeptidyl substrates, and the enzymatic inhibition model using synthetic peptides Gor 3, Gor 4, and Gor 5 are described. The enzymes were purified on p-aminobenzamidine agarose affinity column in an FPLC system using electrophoresis with 12.5% polyacrylamide gel. Michaelis-Menten constants and the inhibition model were determined according to the Dixon methodology and Lineweaver-Burk's double reciprocal. The KM values and catalytic constants of peptide substrates show that A...
September 17, 2017: Protein and Peptide Letters
https://www.readbyqxmd.com/read/28925199/are-stipulated-requirements-for-the-quality-of-maternity-care-complied-with
#11
Lars T Johansen, Aase Serine Devold Pay, Lise Broen, Brit Roland, Pål Øian
No abstract text is available yet for this article.
September 18, 2017: Tidsskrift for Den Norske Lægeforening: Tidsskrift for Praktisk Medicin, Ny Række
https://www.readbyqxmd.com/read/28924920/age-dependent-alpha-synuclein-accumulation-and-phosphorylation-in-the-enteric-nervous-system-in-a-transgenic-mouse-model-of-parkinson-s-disease
#12
Chong-Bin Zhong, Qian-Qian Chen, Caroline Haikal, Wen Li, Alexander Svanbergsson, Meike Diepenbroek, Jia-Yi Li
The enteric nervous system (ENS) controls the function of the gastrointestinal tract and has been implicated in various diseases, including Parkinson's disease (PD). PD is a neurodegenerative disease with Lewy bodies (LBs) and Lewy neurites (LNs) as the main pathological features. In addition to the typical motor symptoms in PD, attention has been drawn to non-motor symptoms, such as constipation, implying dysfunction of the ENS. In the present study, we characterized the age-dependent morphological alterations and aggregation of α-synuclein (α-syn), the primary protein component in LBs and LNs, in the ENS in an α-syn transgenic mouse model...
September 18, 2017: Neuroscience Bulletin
https://www.readbyqxmd.com/read/28924620/alteration-in-plasma-and-striatal-levels-of-d-serine-after-d-serine-administration-with-or-without-nicergoline-an-in-vivo-microdialysis-study
#13
Mayu Onozato, Hiromi Nakazawa, Katsuyuki Ishimaru, Chihiro Nagashima, Minori Fukumoto, Hitomi Hakariya, Tatsuya Sakamoto, Hideaki Ichiba, Takeshi Fukushima
AIMS: d-Serine (d-Ser), a co-agonist of N-methyl-d-aspartate receptor (NMDAR), is effective for treating schizophrenia. The present study investigated changes in plasma and striatal d-Ser levels in Sprague-Dawley (SD) rats after intraperitoneal d-Ser administration alone or together with nicergoline (Nic), a commercial cerebral ameliorating drug, using in vivo microdialysis (MD) to explore the function of Nic. MAIN METHODS: Phosphate-buffered saline (PBS) or Nic (0, 1...
September 2017: Heliyon
https://www.readbyqxmd.com/read/28924459/genetic-code-optimization-for-cotranslational-protein-folding-codon-directional-asymmetry-correlates-with-antiparallel-betasheets-trna-synthetase-classes
#14
Hervé Seligmann, Ganesh Warthi
A new codon property, codon directional asymmetry in nucleotide content (CDA), reveals a biologically meaningful genetic code dimension: palindromic codons (first and last nucleotides identical, codon structure XZX) are symmetric (CDA = 0), codons with structures ZXX/XXZ are 5'/3' asymmetric (CDA = - 1/1; CDA = - 0.5/0.5 if Z and X are both purines or both pyrimidines, assigning negative/positive (-/+) signs is an arbitrary convention). Negative/positive CDAs associate with (a) Fujimoto's tetrahedral codon stereo-table; (b) tRNA synthetase class I/II (aminoacylate the 2'/3' hydroxyl group of the tRNA's last ribose, respectively); and (c) high/low antiparallel (not parallel) betasheet conformation parameters...
2017: Computational and Structural Biotechnology Journal
https://www.readbyqxmd.com/read/28924458/control-of-nuclear-cytoplasmic-shuttling-of-ankrd54-by-pkc%C3%AE
#15
Amy L Samuels, Alison Louw, Reza Zareie, Evan Ingley
AIM: To identify and characterize the effect of phosphorylation on the subcellular localization of Ankrd54. METHODS: HEK293T cells were treated with calyculin A, staurosporin or phorbol 12-myristate 13-acetate (PMA). Cells were transfected with eGFP-tagged Ankrd54 with or without Lyn tyrosine kinase (wild-type, Y397F mutant, or Y508F mutant). The subcellular localization was assessed by immunofluorescence imaging of cells, immunoblotting of subcellular fractionations...
August 26, 2017: World Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28924204/cyclipostins-and-cyclophostin-analogs-as-promising-compounds-in-the-fight-against-tuberculosis
#16
Phuong Chi Nguyen, Vincent Delorme, Anaïs Bénarouche, Benjamin P Martin, Rishi Paudel, Giri R Gnawali, Abdeldjalil Madani, Rémy Puppo, Valérie Landry, Laurent Kremer, Priscille Brodin, Christopher D Spilling, Jean-François Cavalier, Stéphane Canaan
A new class of Cyclophostin and Cyclipostins (CyC) analogs have been investigated against Mycobacterium tuberculosis H37Rv (M. tb) grown either in broth medium or inside macrophages. Our compounds displayed a diversity of action by acting either on extracellular M. tb bacterial growth only, or both intracellularly on infected macrophages as well as extracellularly on bacterial growth with very low toxicity towards host macrophages. Among the eight potential CyCs identified, CyC 17 exhibited the best extracellular antitubercular activity (MIC50 = 500 nM)...
September 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28924058/localization-of-cdc7-protein-kinase-during-dna-replication-in-saccharomyces-cerevisiae
#17
Daniel Rossbach, D Suzi Bryan, Jay R Hesselberth, Robert Sclafani
DDK, a conserved serine-threonine protein kinase composed of a regulatory subunit, Dbf4, and a catalytic subunit, Cdc7, is essential for DNA replication initiation during S phase of the cell cycle through MCM2-7 helicase phosphorylation. The biological significance of DDK is well characterized, but the full mechanism of how DDK associates with substrates remains unclear. Cdc7 is bound to chromatin in the Saccharomyces cerevisiae genome throughout the cell cycle, but there is little empirical evidence as to specific Cdc7 binding locations...
September 18, 2017: G3: Genes—Genomes—Genetics
https://www.readbyqxmd.com/read/28924041/irak4-kinase-activity-controls-toll-like-receptor-induced-inflammation-through-the-transcription-factor-irf5-in-primary-human-monocytes
#18
Leah Cushing, Aaron Winkler, Scott A Jelinsky, Katherine Lee, Wouter Korver, Rachael Hawtin, Vikram R Rao, Margaret Fleming, Lih-Ling Lin
Interleukin-1 receptor associated kinase 4 (IRAK4) plays a critical role in innate immune signaling by Toll-like receptors (TLRs), and loss of IRAK4 activity in mice and humans increases susceptibility to bacterial infections and causes defects in TLR and IL1 ligand sensing. However, the mechanism by which IRAK4 activity regulates the production of downstream inflammatory cytokines is unclear. Using transcriptomic and biochemical analyses of human monocytes treated with a highly potent and selective inhibitor of IRAK4, we show that IRAK4 kinase activity controls the activation of the transcription factor IRF5, a transcription factor implicated in the pathogenesis of multiple autoimmune diseases...
September 18, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28923481/adam17-is-the-main-sheddase-for-the-generation-of-human-triggering-receptor-expressed-in-myeloid-cells-htrem2-ectodomain-and-cleaves-trem2-after-histidine-157
#19
Dominik Feuerbach, Patrick Schindler, Carmen Barske, Stefanie Joller, Edwige Beng-Louka, Katie A Worringer, Sravya Kommineni, Ajamete Kaykas, Daniel J Ho, Chaoyang Ye, Karl Welzenbach, Gaelle Elain, Laurent Klein, Irena Brzak, Anis K Mir, Christopher J Farady, Reiner Aichholz, Simone Popp, Nathalie George, Ulf Neumann
Triggering receptor expressed in myeloid cells (TREM2) is a member of the immunoglobulin superfamily and is expressed in macrophages, dendritic cells, microglia, and osteoclasts. TREM2 plays a role in phagocytosis, regulates release of cytokine, contributes to microglia maintenance, and its ectodomain is shed from the cell surface. Here, the question was addressed at which position sheddases cleave TREM2 and what are the proteases involved in this process. Using both pharmacological and genetic approaches we report that the main protease contributing to the release of TREM2 ectodomain is ADAM17, (a disintegrin and metalloproteinase domain containing protein, also called TACE, TNFα converting enzyme) while ADAM10 plays a minor role...
September 15, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28923009/apophysomyces-variabilis-draft-genome-sequence-and-comparison-of-predictive-virulence-determinants-with-other-medically-important-mucorales
#20
Hariprasath Prakash, Shivaprakash Mandya Rudramurthy, Prasad S Gandham, Anup Kumar Ghosh, Milner M Kumar, Chandan Badapanda, Arunaloke Chakrabarti
BACKGROUND: Apophysomyces species are prevalent in tropical countries and A. variabilis is the second most frequent agent causing mucormycosis in India. Among Apophysomyces species, A. elegans, A. trapeziformis and A. variabilis are commonly incriminated in human infections. The genome sequences of A. elegans and A. trapeziformis are available in public database, but not A. variabilis. We, therefore, performed the whole genome sequence of A. variabilis to explore its genomic structure and possible genes determining the virulence of the organism...
September 18, 2017: BMC Genomics
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