keyword
MENU ▼
Read by QxMD icon Read
search

Nef

keyword
https://www.readbyqxmd.com/read/29338738/rapid-hiv-disease-progression-following-superinfection-in-an-hla-b-27-05-b-57-01-positive-transmission-recipient
#1
Jacqui Brener, Astrid Gall, Jacob Hurst, Rebecca Batorsky, Nora Lavandier, Fabian Chen, Anne Edwards, Chrissy Bolton, Reena Dsouza, Todd Allen, Oliver G Pybus, Paul Kellam, Philippa C Matthews, Philip J R Goulder
BACKGROUND: The factors determining differential HIV disease outcome among individuals expressing protective HLA alleles such as HLA-B*27:05 and HLA-B*57:01 remain unknown. We here analyse two HIV-infected subjects expressing both HLA-B*27:05 and HLA-B*57:01. One subject maintained low-to-undetectable viral loads for more than a decade of follow up. The other progressed to AIDS in < 3 years. RESULTS: The rapid progressor was the recipient within a known transmission pair, enabling virus sequences to be tracked from transmission...
January 16, 2018: Retrovirology
https://www.readbyqxmd.com/read/29334757/high-prevalence-of-non-b-hiv-1-subtypes-in-overseas-sailors-and-prostitutes-in-korea
#2
Young-Keol Cho, Jung Eun Kim, Brian Thomas Foley
There have been no studies related to groups at the highest risk for HIV-1 infection in Korea before 1993. Here, for the first time, we report the distribution of HIV subtypes in overseas sailors (OSs), and prostitutes who worked in brothels near US military bases in Korea. We retrospectively determined the sequences of nef in 131 patients using RT-PCR. These patients comprised of 102 OSs, 14 OS spouses, and 15 prostitutes. Phylogenetic analysis was performed using 128 Korean OSs, OS spouses, and prostitutes...
January 15, 2018: AIDS Research and Human Retroviruses
https://www.readbyqxmd.com/read/29329537/the-hiv-1-accessory-proteins-nef-and-vpu-downregulate-total-and-cell-surface-cd28-in-cd4-t-cells
#3
Emily N Pawlak, Brennan S Dirk, Rajesh Abraham Jacob, Aaron L Johnson, Jimmy D Dikeakos
BACKGROUND: The HIV-1 accessory proteins Nef and Vpu alter cell surface levels of multiple host proteins to modify the immune response and increase viral persistence. Nef and Vpu can downregulate cell surface levels of the co-stimulatory molecule CD28, however the mechanism of this function has not been completely elucidated. RESULTS: Here, we provide evidence that Nef and Vpu decrease cell surface and total cellular levels of CD28. Moreover, using inhibitors we implicate the cellular degradation machinery in the downregulation of CD28...
January 12, 2018: Retrovirology
https://www.readbyqxmd.com/read/29323281/bap-sil1-regulates-the-molecular-chaperone-bip-by-coupling-release-of-nucleotide-and-substrate
#4
Mathias Rosam, Daniela Krader, Christina Nickels, Janine Hochmair, Katrin C Back, Ganesh Agam, Anders Barth, Cathleen Zeymer, Jelle Hendrix, Markus Schneider, Iris Antes, Jochen Reinstein, Don C Lamb, Johannes Buchner
BiP is the endoplasmic member of the Hsp70 family. BiP is regulated by several co-chaperones including the nucleotide-exchange factor (NEF) Bap (Sil1 in yeast). Bap is a two-domain protein. The interaction of the Bap C-terminal domain with the BiP ATPase domain is sufficient for its weak NEF activity. However, stimulation of the BiP ATPase activity requires full-length Bap, suggesting a complex interplay of these two factors. Here, single-molecule FRET experiments with mammalian proteins reveal that Bap affects the conformation of both BiP domains, including the lid subdomain, which is important for substrate binding...
January 2018: Nature Structural & Molecular Biology
https://www.readbyqxmd.com/read/29323280/nucleotide-exchange-factors-fes1-and-hspbp1-mimic-substrate-to-release-misfolded-proteins-from-hsp70
#5
Naveen K C Gowda, Jayasankar M Kaimal, Roman Kityk, Chammiran Daniel, Jobst Liebau, Marie Öhman, Matthias P Mayer, Claes Andréasson
Protein quality control depends on the tight regulation of interactions between molecular chaperones and polypeptide substrates. Substrate release from the chaperone Hsp70 is triggered by nucleotide-exchange factors (NEFs) that control folding and degradation fates via poorly understood mechanisms. We found that the armadillo-type NEFs budding yeast Fes1 and its human homolog HspBP1 employ flexible N-terminal release domains (RDs) with substrate-mimicking properties to ensure the efficient release of persistent substrates from Hsp70...
January 2018: Nature Structural & Molecular Biology
https://www.readbyqxmd.com/read/29311643/lncrna-nef-antagonized-epithelial-to-mesenchymal-transition-and-cancer-metastasis-via-cis-regulating-foxa2-and-inactivating-wnt-%C3%AE-catenin-signaling
#6
Wei-Cheng Liang, Jia-Lin Ren, Cheuk-Wa Wong, Sun-On Chan, Mary Miu-Yee Waye, Wei-Ming Fu, Jin-Fang Zhang
Emerging evidence indicates that the long noncoding RNAs extensively participate in cancer progression. Nevertheless, the molecular pathogenesis of how these lncRNAs regulate tumorigenesis has not been fully elucidated especially in hepatocellular carcinoma (HCC). Here, we sought to define the role of a novel lncRNA named lncRNA-NEF in modulating epithelial to mesenchymal transition (EMT) in HCC. It was found that the lncRNA-NEF was transcriptionally activated by EMT suppressor FOXA2 and frequently downregulated in HCC cell lines as well as clinical specimens...
January 9, 2018: Oncogene
https://www.readbyqxmd.com/read/29303194/charge-transport-in-a-single-molecule-transistor-probed-by-scanning-tunneling-microscopy
#7
Samuel Bouvron, Romain Maurand, Alexander Graf, Philipp Erler, Luca Gragnaniello, Maxim Skripnik, Dirk Wiedmann, Clara Engesser, Cornelia Nef, Wangyang Fu, Christian Schönenberger, Fabian Pauly, Mikhail Fonin
We report on the scanning tunneling microscopy/spectroscopy (STM/STS) study of cobalt phthalocyanine (CoPc) molecules deposited onto a back-gated graphene device. We observe a clear gate voltage (Vg) dependence of the energy position of the features originating from the molecular states. Based on the analysis of the energy shifts of the molecular features upon tuning Vg, we are able to determine the nature of the electronic states that lead to a gapped differential conductance. Our measurements show that capacitive couplings of comparable strengths exist between the CoPc molecule and the STM tip as well as between CoPc and graphene, thus facilitating electronic transport involving only unoccupied molecular states for both tunneling bias polarities...
January 5, 2018: Nanoscale
https://www.readbyqxmd.com/read/29274046/outcome-of-thrombus-aspiration-in-stemi-patients-a-propensity-score-adjusted-study
#8
Johannes Blumenstein, Steffen Daniel Kriechbaum, Jürgen Leick, Alexander Meyer, Won-Keun Kim, Jan Sebastian Wolter, Maisun Abu-Samra, Kay Weipert, Matthias Bayer, Oliver Dörr, Claudia Walther, Christian W Hamm, Holger Nef, Christoph Liebetrau, Helge Möllmann
The use of thrombus aspiration (TA) prior to primary percutaneous coronary intervention (PPCI) has undergone a radical change in intervention guidelines. The clinical implications, however, are still under scrutiny. This study investigated the clinical effects and outcome of TA before PPCI in patients with ST-segment elevation myocardial infarction (STEMI). Overall 1027 patients with STEMI were analyzed in this retrospective, propensity score-adjusted, multicenter study. The primary endpoints were in-hospital and long-term mortality...
December 23, 2017: Journal of Thrombosis and Thrombolysis
https://www.readbyqxmd.com/read/29273519/adenosine-monophosphate-activated-protein-kinase-modulation-by-berberine-attenuates-mitochondrial-deficits-and-redox-imbalance-in-experimental-diabetic-neuropathy
#9
Veera Ganesh Yerra, Anil Kumar Kalvala, Bhoomika Sherkhane, Aparna Areti, Ashutosh Kumar
Adenosine monophosphate activated protein kinase (AMPK) has been studied for its myriad metabolic and mitochondrial benefits in several chronic diseases. Recent studies have uncovered its therapeutic potential against mitochondrial dysfunction in cultured dorsal root ganglion (DRG) neurons isolated from streptozotocin (STZ) induced diabetic rats. The present study is aimed at evaluating the pharmacological efficacy of berberine (BRB), a natural AMPK activator against experimental diabetic neuropathy (DN) phenotype developed in STZ (55 mg/kg, i...
December 19, 2017: Neuropharmacology
https://www.readbyqxmd.com/read/29258818/remodeling-of-hiv-1-nef-structure-by-src-family-kinase-binding
#10
Jamie A Moroco, John Jeff Alvarado, Ryan P Staudt, Haibin Shic, Thomas E Wales, Thomas E Smithgall, John R Engen
The HIV-1 accessory protein Nef controls multiple aspects of the viral life cycle and host immune response, making it an attractive therapeutic target. Previous X-ray crystal structures of Nef in complex with key host cell binding partners have shed light on protein-protein interactions critical to Nef function. Crystal structures of Nef in complex with either the SH3 or tandem SH3-SH2 domains of Src-family kinases reveal distinct dimer conformations of Nef. However, the existence of these Nef dimer complexes in solution has not been established...
December 16, 2017: Journal of Molecular Biology
https://www.readbyqxmd.com/read/29247971/refolding-of-autodisplayed-anti-nef-scfv-through-oxidation-with-glutathione-for-immunosensors
#11
Ji-Hong Bong, Hyun-Woo Song, Tae-Hun Kim, Min-Jung Kang, Joachim Jose, Jae-Chul Pyun
In this study, a single-domain antibody against negative regulatory factor (anti-NEF scFv) was autodisplayed on the outer membrane of Escherichia coli and used to detect NEF in an immunoassay based on fluorescence-activated cell sorting, enzyme-linked immunosorbent assay, and surface plasmon resonance biosensors. Next, the autodisplayed single-domain antibody was oxidized to form disulfide bonds by using glutathione, and the change in NEF-binding activity of anti-NEF scFv was analyzed by fluorescence-activated cell sorting-based immunoassay, chromogenic immunoassay, and surface plasmon resonance biosensor...
December 8, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/29241096/study-of-non-covalent-interactions-on-dendriplex-formation-influence-of-hydrophobic-electrostatic-and-hydrogen-bonds-interactions
#12
María Sánchez-Milla, Isabel Pastor, Marek Maly, M Jesús Serramía, Rafael Gómez, Javier Sánchez-Nieves, Félix Ritort, M Ángeles Muñoz-Fernández, F Javier de la Mata
The interaction of a double stranded small interference RNA (siRNA Nef) with cationic carbosilane dendrimers of generations 1-3 with two different ammonium functions at the periphery ([-NMe2R]+, R=Me, (CH2)2OH) has been studied by experimental techniques (zeta potential, electrophoresis, single molecule pulling experiments) and molecular dynamic calculations. These studies state the presence of different forces on dendriplex formation, depending on generation and type of ammonium group. Whilst for higher dendrimers electrostatic forces mainly drive the stability of dendriplexes, first generation compounds can penetrate into siRNA strands due to the establishment of hydrophobic interactions...
December 8, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/29237835/hla-class-i-mediated-hiv-1-control-in-vietnamese-infected-with-hiv-1-subtype-a-e
#13
Takayuki Chikata, Giang Van Tran, Hayato Murakoshi, Tomohiro Akahoshi, Ying Qi, Vivek Naranbhai, Nozomi Kuse, Yoshiko Tamura, Madoka Koyanagi, Sachiko Sakai, Dung Hoai Nguyen, Dung Thi Nguyen, Ha Thu Nguyen, Trung Vu Nguyen, Shinichi Oka, Maureen P Martin, Mary Carrington, Keiko Sakai, Kinh Van Nguyen, Masafumi Takiguchi
HIV-1-specific cytotoxic T cells (CTLs) play an important role in the control of HIV-1 subtype B or C infection. However, the role of CTLs in HIV-1 subtype A/E infection still remains unclear. Here we investigated the association of HLA class I alleles with clinical outcome in treatment-naïve Vietnamese infected with subtype A/E. We found that HLA-C*12:02 was significantly associated with lower pVL and higher CD4 count and that the HLA-A*29:01-B*07:05-C*15:05 haplotype was significantly associated with higher pVL and lower CD4 count as compared to individuals without these respective genotypes...
December 13, 2017: Journal of Virology
https://www.readbyqxmd.com/read/29237831/maintenance-of-ap-2-dependent-functional-activities-of-nef-restricts-pathways-of-immune-escape-from-cd8-t-lymphocyte-responses
#14
Blake Schouest, Andrea M Weiler, Sanath Kumar Janaka, T Alix Myers, Arpita Das, Sarah C Wilder, Jessica Furlott, Melody Baddoo, Erik K Flemington, Eva G Rakasz, David T Evans, Thomas C Friedrich, Nicholas J Maness
Nef-specific CD8+ T lymphocytes (CD8TL) are linked to extraordinary control of primate lentiviral replication, but the mechanisms underlying their efficacy remain largely unknown. The immunodominant, Mamu-B*017:01+ restricted Nef195-203MW9 epitope in SIVmac239 partially overlaps a sorting motif important for interactions with host AP-2 proteins and, hence, downmodulation of several host proteins including Tetherin (CD317/BST-2), CD28, CD4, SERINC3, and SERINC5. We reasoned that CD8TL-driven evolution in this epitope might compromise Nef's ability to modulate these important molecules...
December 13, 2017: Journal of Virology
https://www.readbyqxmd.com/read/29228149/outcome-after-transvascular-transcatheter-aortic-valve-implantation-in-2016
#15
Luise Gaede, Johannes Blumenstein, Christoph Liebetrau, Oliver Dörr, Won-Keun Kim, Holger Nef, Oliver Husser, Albrecht Elsässer, Christian W Hamm, Helge Möllmann
Aims: We analysed the number of procedures, complications, and in-hospital mortality rates of all patients undergoing transvascular transcatheter aortic valve implantation (TV-TAVI) in comparison to isolated surgical aortic valve replacement (iSAVR) from 2014 to 2016 in Germany. Methods and results: All aortic valve procedures performed in Germany are mandatorily registered in a quality control program. More than 15 000 TV-TAVI procedures were performed in 2016 in Germany...
December 8, 2017: European Heart Journal
https://www.readbyqxmd.com/read/29220306/improving-spiking-dynamical-networks-accurate-delays-higher-order-synapses-and-time-cells
#16
Aaron R Voelker, Chris Eliasmith
Researchers building spiking neural networks face the challenge of improving the biological plausibility of their model networks while maintaining the ability to quantitatively characterize network behavior. In this work, we extend the theory behind the neural engineering framework (NEF), a method of building spiking dynamical networks, to permit the use of a broad class of synapse models while maintaining prescribed dynamics up to a given order. This theory improves our understanding of how low-level synaptic properties alter the accuracy of high-level computations in spiking dynamical networks...
December 8, 2017: Neural Computation
https://www.readbyqxmd.com/read/29186426/the-liver-receptor-homolog-1-lrh-1-is-expressed-in-human-islets-and-protects-%C3%AE-cells-against-stress-induced-apoptosis
#17
Mathurin Baquié, Luc St-Onge, Julie Kerr-Conte, Nadia Cobo-Vuilleumier, Petra I Lorenzo, Carmen M Jimenez Moreno, Christopher R Cederroth, Serge Nef, Sophie Borot, Domenico Bosco, Haiyan Wang, Piero Marchetti, Francois Pattou, Claes B Wollheim, Benoit R Gauthier
No abstract text is available yet for this article.
November 27, 2017: Human Molecular Genetics
https://www.readbyqxmd.com/read/29177659/nucleotide-exchange-factors-for-hsp70-chaperones
#18
Heike Rampelt, Matthias P Mayer, Bernd Bukau
The ATPase cycle of Hsp70 chaperones controls their transient association with substrates and thus governs their function in protein folding. Nucleotide exchange factors (NEFs) accelerate ADP release from Hsp70, which results in rebinding of ATP and release of the substrate, thereby regulating the lifetime of the Hsp70-substrate complex. This chapter describes several methods suitable to study NEFs of Hsp70 chaperones. On the one hand, steady-state ATPase assays provide information on how the NEF influences progression of the Hsp70 through the entire ATPase cycle...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29176822/change-detection-in-pictorial-and-solid-scenes-the-role-of-depth-of-field
#19
Tingting Zhang, Harold Nefs, Ingrid Heynderickx
This paper investigates the influence of depth of field on change detection in both pictorial and solid scenes. In this work, a within-subjects experiment is conducted using a flicker paradigm, with which the hit rate and response time for change detection are obtained. The results show that depth of field has effects on change detection: the hit rate is smaller and response time is longer in the scene with small depth of field than in the scene with large depth of field or uniform blur. It is concluded that when depth of field is small and binocular disparity is not zero in a picture, the influence of depth of field on change detection is more significant than binocular disparity...
2017: PloS One
https://www.readbyqxmd.com/read/29171715/restenosis-patterns-after-bioresorbable-vascular-scaffold-implantation-angiographic-substudy-of-the-ghost-eu-registry
#20
Moritz Baquet, Holger Nef, Tomasso Gori, Azeem Latib, Davide Capodanno, Carlo Di Mario, Manel Sabate, Antonio Colombo, Corrado Tamburino, Julinda Mehilli
OBJECTIVES: To evaluate pattern of in-BVS-restenosis after bioresorbable vascular scaffold (BVS) implantation. BACKGROUND: In-stent restenosis morphology impacts target lesion revascularization (TLR) rates and clinical outcomes. Although several trials report on outcomes after BVS implantation, information about in-BVS restenosis pattern is still lacking. METHODS: Between November 2011 and January 2014, in 7 of 10 European centers participating in the GHOST-EU registry, 668 patients underwent BVS implantation...
November 24, 2017: Catheterization and Cardiovascular Interventions
keyword
keyword
60040
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"