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Cell Biochemistry and Biophysics

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https://www.readbyqxmd.com/read/30003432/transforming-growth-factor-beta-tfg-%C3%AE-concentration-isoforms-are-diminished-in-acute-coronary-syndrome
#1
Jorge Ramón Padilla-Gutiérrez, Emmanuel Valdés-Alvarado, Saraí Citlalic Rodríguez-Reyes, Juan Arellano-Martin, Héctor Enrique Flores-Salinas, José Francisco Muñoz Valle, Yeminia Valle
Acute coronary syndrome (ACS) is the leading cause of death in elderly patients worldwide. Due its participation in apoptosis, fibrosis, and angiogenesis, transforming growth factor-β (TGF-β) isoforms had been categorized as risk factors for cardiovascular diseases. However, due their contradictory activities, a cardioprotective role has been suggested. The aim was to measure the plasma levels of TGF-β1, 2, and 3 proteins in patients with ACS. This was a case-control study including 225 subjects. The three activated isoforms were measured in serum using the Bio-Plex Pro TGF-β assay by means of magnetic beads; the fluorescence intensity of reporter signal was read in a Bio-Plex Magpix instrument...
July 12, 2018: Cell Biochemistry and Biophysics
https://www.readbyqxmd.com/read/29956081/p47phox-dependent-reactive-oxygen-species-stimulate-nuclear-translocation-of-the-foxo1-transcription-factor-during-metabolic-inhibition-in-cardiomyoblasts
#2
Ellis N Ter Horst, Nynke E Hahn, Dirk Geerts, René J P Musters, Walter J Paulus, Albert C van Rossum, Christof Meischl, Jan J Piek, Hans W M Niessen, Paul A J Krijnen
Reactive oxygen species (ROS) control forkhead box O (FOXO) transcription factor activity by influencing their nuclear translocation. However, knowledge of the ROS cellular source(s) involved herein remains scarce. Recently, we have shown p47phox -dependent activation of ROS-producing NADPH oxidase (NOX) at the nuclear pore in H9c2 rat cardiomyoblasts in response to ischemia. This localizes NOX perfectly to affect protein nuclear translocation, including that of transcription factors. In the current study, involvement of p47phox -dependent production of ROS in the nuclear translocation of FOXO1 was analyzed in H9c2 cells following 4 h of metabolic inhibition (MI), which mimics the effects of ischemia...
June 29, 2018: Cell Biochemistry and Biophysics
https://www.readbyqxmd.com/read/29943362/uniform-field-resonators-for-epr-spectroscopy-a-review
#3
James S Hyde, Jason W Sidabras, Richard R Mett
Cavity resonators are often used for electron paramagnetic resonance (EPR). Rectangular TE102 and cylindrical TE011 are common modes at X-band even though the field varies cosinusoidally along the Z-axis. The authors found a way to create a uniform field (UF) in these modes. A length of waveguide at cut-off was introduced for the sample region, and tailored end sections were developed that supported the microwave resonant mode. This work is reviewed here. The radio frequency (RF) magnetic field in loop-gap resonators (LGR) at X-band is uniform along the Z-axis of the sample, which is a benefit of LGR technology...
June 25, 2018: Cell Biochemistry and Biophysics
https://www.readbyqxmd.com/read/29926429/targeting-outer-membrane-protein-component-adec-for-the-discovery-of-efflux-pump-inhibitor-against-adeabc-efflux-pump-of-multidrug-resistant-acinetobacter-baumannii
#4
Privita Verma, Vishvanath Tiwari
The structure and functioning of multidrug efflux systems provide us with a better understanding of the transport of various antibiotics, thus giving a path for the discovery of effective compounds for combating the multidrug resistance in Acinetobacter baumannii. In the present study, a number of computational techniques have been used to search for an inhibitor for the RND efflux pump, AdeABC, of A. baumannii targeting specifically its outermost component, i.e., AdeC. We have prepared the three-dimensional structure for AdeC using MODELLER v9...
June 20, 2018: Cell Biochemistry and Biophysics
https://www.readbyqxmd.com/read/29761345/mutational-analysis-of-the-cysteine-rich-region-of-the-iron-responsive-gata-factor-fep1-role-of-individual-cysteines-as-2fe-2s-cluster-ligands
#5
Maria Carmela Bonaccorsi di Patti, Antimo Cutone, Giovanni Musci
Fep1, the iron-dependent GATA-type transcriptional repressor of the methylotrophic yeast Pichia pastoris, has a dimeric structure and binds an iron-sulfur cluster of the [2Fe-2S] type. In this work, we extend the characterization of this protein by analysis of the optical and CD spectroscopic properties of a set of mutants where cysteines within the conserved Cys-X5 -Cys-X8- Cys-X2 -Cys motif have been targeted, in order to evaluate their role as [2Fe-2S] ligands. The results suggest that all four cysteine residues are essential because replacing them with serines in different combinations invariably produces a protein unable to correctly bind the [2Fe-2S] cluster...
May 14, 2018: Cell Biochemistry and Biophysics
https://www.readbyqxmd.com/read/29704106/applications-of-m%C3%A3-ssbauer-spectroscopy-in-biomedical-research
#6
M I Oshtrakh
A brief review on the applications of Mössbauer spectroscopy in biomedical research discusses the results of more than fifty years of experience in this field. Basing on the numerous results the main directions of biomedical applications of Mössbauer spectroscopy are considered as follows: 1) studies of the quantitative changes of iron-containing biomolecules related to pathological processes; 2) studies of the qualitative changes in iron-containing biomolecules related to pathological processes; 3) studies of the effect of various environmental factors (physical, chemical, and biological) on iron-containing biomolecules; 4) studies of metabolic processes by means of analysis of the Mössbauer nuclides pathways in organisms; 5) studies of dynamic processes; 6) studies of pharmaceutical compounds and blood substitutes containing Mössbauer nuclides; 7) miscellaneous studies...
April 27, 2018: Cell Biochemistry and Biophysics
https://www.readbyqxmd.com/read/29687225/hyphenated-3d-qsar-statistical-model-drug-repurposing-analysis-for-the-identification-of-potent-neuraminidase-inhibitor
#7
K Rohini, V Shanthi
The Influenza A virus is one of the principle causes of respiratory illness in human. The surface glycoprotein of the influenza virus, neuraminidase (NA), has a vital role in the release of new viral particle and spreads infection in the respiratory tract. It has been long recognized as a valid drug target for influenza A virus infection. Oseltamivir is used as a standard drug of choice for the treatment of influenza. However, the emergence of mutants with novel mutations has increased the resistance to potent NA inhibitor...
April 23, 2018: Cell Biochemistry and Biophysics
https://www.readbyqxmd.com/read/29572698/2018-letter-from-the-editor-in-chief
#8
EDITORIAL
Lawrence Berliner
No abstract text is available yet for this article.
June 2018: Cell Biochemistry and Biophysics
https://www.readbyqxmd.com/read/29380245/screening-of-potential-inhibitor-against-coat-protein-of-apple-chlorotic-leaf-spot-virus
#9
Rituraj Purohit, Sachin Kumar, Vipin Hallan
In this study, we analyzed Coat protein (CP) of Apple chlorotic leaf spot virus (ACLSV), an important latent virus on Apple. Incidence of the virus is upto 60% in various apple cultivars, affecting yield losses of the order of 10-40% (depending upon the cultivar). CP plays an important role as the sole building block of the viral capsid. Homology approach was used to model 193 amino acid sequence of the coat protein. We used various servers such as ConSurf, TargetS, OSML, COACH, COFACTOR for the prediction of active site residues in coat protein...
June 2018: Cell Biochemistry and Biophysics
https://www.readbyqxmd.com/read/29322360/highly-conserved-arg-residue-of-erfnin-motif-of-pro-domain-is-important-for-ph-induced-zymogen-activation-process-in-cysteine-cathepsins-k-and-l
#10
Pulakesh Aich, Sampa Biswas
Pro-domain of a cysteine cathepsin contains a highly conserved Ex2 Rx2 Fx2 Nx3 Ix3 N (ERFNIN) motif. The zymogen structure of cathepsins revealed that the Arg(R) residue of the motif is a central residue of a salt-bridge/H-bond network, stabilizing the scaffold of the pro-domain. Importance of the arginine is also demonstrated in studies where a single mutation (Arg → Trp) in human lysosomal cathepsin K (hCTSK) is linked to a bone-related genetic disorder "Pycnodysostosis". In the present study, we have characterized in vitro Arg → Trp mutant of hCTSK and the same mutant of hCTSL...
June 2018: Cell Biochemistry and Biophysics
https://www.readbyqxmd.com/read/29313175/a-biomolecular-network-driven-proteinic-interaction-in-hcv-clearance
#11
Pratichi Singh, Febin Prabhu Dass J
Hepatitis C virus infection causes chronic liver disease that leads to cancer-related mortality. Presently around 30% of the HCV (infected) affected population get rid of the infection through spontaneous disease clearance. This phenomenon is conducted by a set of reported immune candidate genes. Hence, this study focuses only on these immune-response related genes with aid of network approach, where the idea is to disseminate the network for better understanding of key functional genes and their transcription control activity...
June 2018: Cell Biochemistry and Biophysics
https://www.readbyqxmd.com/read/29134494/expression-of-telomere-associated-proteins-is-interdependent-to-stabilize-native-telomere-structure-and-telomere-dysfunction-by-g-quadruplex-ligand-causes-terra-upregulation
#12
Ratan Sadhukhan, Priyanka Chowdhury, Sourav Ghosh, Utpal Ghosh
Telomere DNA can form specialized nucleoprotein structure with telomere-associated proteins to hide free DNA ends or G-quadruplex structures under certain conditions especially in presence of G-quadruplex ligand. Telomere DNA is transcribed to form non-coding telomere repeat-containing RNA (TERRA) whose biogenesis and function is poorly understood. Our aim was to find the role of telomere-associated proteins and telomere structures in TERRA transcription. We silenced four [two shelterin (TRF1, TRF2) and two non-shelterin (PARP-1, SLX4)] telomere-associated genes using siRNA and verified depletion in protein level...
June 2018: Cell Biochemistry and Biophysics
https://www.readbyqxmd.com/read/29116599/the-class-a-gpcr-dopamine-d2-receptor-forms-transient-dimers-stabilized-by-agonists-detection-by-single-molecule-tracking
#13
Rinshi S Kasai, Shuichi V Ito, Ryo M Awane, Takahiro K Fujiwara, Akihiro Kusumi
Whether class-A G-protein coupled receptors (GPCRs) exist and work as monomers or dimers has drawn extensive attention. A class-A GPCR dopamine D2 receptor (D2R) is involved in many physiological and pathological processes and diseases, indicating its critical role in proper functioning of neuronal circuits. In particular, D2R homodimers might play key roles in schizophrenia development and amphetamine-induced psychosis. Here, using single-molecule imaging, we directly tracked single D2R molecules in the plasma membrane at a physiological temperature of 37 °C, and unequivocally determined that D2R forms transient dimers with a lifetime of 68 ms in its resting state...
June 2018: Cell Biochemistry and Biophysics
https://www.readbyqxmd.com/read/29090414/liver-genes-expression-induced-by-tamoxifen-loaded-solid-lipid-nanoparticles-in-wistar-female-rats
#14
Naser Zanganeh, Nasrin Ziamajidi, Iraj Khodadadi, Massoud Saidijam, Roghayeh Abbasalipourkabir
The objective of this study was to investigate the effect of free tamoxifen and tamoxifen-loaded solid lipid nanoparticles (SLN) on cytochrome P450 (CYP3A2) and flavin-containing monooxygenase1 (FMO1) genes expression in the liver of female Wistar rats. Thirty female Wistar rats aged 7-8 weeks, were divided into six groups of six rats each. The first, second, third, and fourth groups were ovariectomized and received tamoxifen (2  mg/kg of body weight dissolved in 1  ml olive oil), tamoxifen-loaded SLN (2  mg/kg of body weight dispersed in 1  ml olive oil), SLN (10  mg/kg of body weight dispersed in 1  ml olive oil), and 1  ml olive oil, respectively...
June 2018: Cell Biochemistry and Biophysics
https://www.readbyqxmd.com/read/29067585/intrinsic-response-towards-physiologic-stiffness-is-cell-type-dependent
#15
Michael Reimer, Silviya Petrova Zustiak, Saahil Sheth, Joseph Martin Schober
In the continuous search for better tissue engineering scaffolds it has become increasingly clear that the substrate properties dramatically affect cell responses. Here we compared cells from a physiologically stiff tissue, melanoma, to cells isolated from a physiologically soft tissue, brain. We measured the cell line responses to laminin immobilized onto glass or polyacrylamide hydrogels tuned to have a Young's modulus ranging from 1 to 390 kPa. Single cells were analyzed for spreading area, shape, total actin content, actin-based morphological features and modification of immobilized laminin...
June 2018: Cell Biochemistry and Biophysics
https://www.readbyqxmd.com/read/29039057/the-effects-of-low-doses-of-gamma-radiation-on-growth-and-membrane-activity-of-pseudomonas-aeruginosa-grp3-and-escherichia-coli-m17
#16
D Soghomonyan, A Margaryan, K Trchounian, K Ohanyan, H Badalyan, A Trchounian
Microorganisms are part of the natural environments and reflect the effects of different physical factors of surrounding environment, such as gamma (γ) radiation. This work was devoted to the study of the influence of low doses of γ radiation with the intensity of 2.56 μW (m2  s)-1 (absorbed doses were 3.8 mGy for the radiation of 15 min and 7.2 mGy-for 30 min) on Escherichia coli M-17 and Pseudomonas aeruginosa GRP3 wild type cells. The changes of bacterial, growth, survival, morphology, and membrane activity had been studied after γ irradiation...
June 2018: Cell Biochemistry and Biophysics
https://www.readbyqxmd.com/read/28975596/erratum-to-hypoxia-augments-increased-hif-1a-and-reduced-survival-protein-p-akt-in-gelsolin-gsn-dependent-cardiomyoblast-cell-apoptosis
#17
Yu-Lan Yeh, Wei-Syun Hu, Wei-Jen Ting, Chia-Yao Shen, Hsi-Hsien Hsu, Li-Chin Chung, Chuan-Chou Tu, Sheng-Huang Chang, Cecilia-Hsuan Day, Yuhsin Tsai, Chih-Yang Huang
No abstract text is available yet for this article.
June 2018: Cell Biochemistry and Biophysics
https://www.readbyqxmd.com/read/28952073/cysteine-to-serine-conversion-at-111th-position-renders-the-disaggregation-and-retains-the-stabilization-of-detrimental-sod1-a4v-mutant-against-amyotrophic-lateral-sclerosis-in-human-a-discrete-molecular-dynamics-study
#18
E Srinivasan, R Rajasekaran
Protein aggregation is a hallmark of various neurodegenerative disorders, such as amyotrophic lateral sclerosis (ALS) in humans. Mutations in Cu/Zn superoxide dismutase (SOD1) protein were found to be a prominent cause behind the majority of the familial ALS cases with abnormal protein aggregates. Herein, we report the biophysical characterization of the beneficial mutation C111S that stabilizes the SOD1 harboring A4V mutation, one of the most lethal diseases causing mutant that leads to protein destabilization and aggregation...
June 2018: Cell Biochemistry and Biophysics
https://www.readbyqxmd.com/read/28942575/a-contact-based-method-for-differentiation-of-human-mesenchymal-stem-cells-into-an-endothelial-cell-phenotype
#19
Binata Joddar, Shweta Anil Kumar, Alok Kumar
Adult stem cells such as mesenchymal stem cells (MSC) are known to possess the ability to augment neovascularization processes and are thus widely popular as an autologous source of progenitor cells. However there is a huge gap in our current knowledge of mechanisms involved in differentiating MSC into endothelial cells (EC), essential for lining engineered blood vessels. To fill up this gap, we attempted to differentiate human MSC into EC, by culturing the former onto chemically fixed layers of EC or its ECM, respectively...
June 2018: Cell Biochemistry and Biophysics
https://www.readbyqxmd.com/read/28871484/epr-oximetry-sensor-developing-a-tam-derivative-for-in-vivo-studies
#20
Agnieszka Boś-Liedke, Magdalena Walawender, Anna Woźniak, Dorota Flak, Jacek Gapiński, Stefan Jurga, Małgorzata Kucińska, Adam Plewiński, Marek Murias, Marwa Elewa, Lisa Lampp, Peter Imming, Krzysztof Tadyszak
Oxygenation is one of the most important physiological parameters of biological systems. Low oxygen concentration (hypoxia) is associated with various pathophysiological processes in different organs. Hypoxia is of special importance in tumor therapy, causing poor response to treatment. Triaryl methyl (TAM) derivative radicals are commonly used in electron paramagnetic resonance (EPR) as sensors for quantitative spatial tissue oxygen mapping. They are also known as magnetic resonance imaging (MRI) contrast agents and fluorescence imaging compounds...
June 2018: Cell Biochemistry and Biophysics
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