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https://www.readbyqxmd.com/read/28212524/role-of-nrf2-and-protective-effects-of-metformin-against-tobacco-smoke-induced-cerebrovascular-toxicity
#1
Shikha Prasad, Ravi K Sajja, Mohammad Abul Kaisar, Jee Hyun Park, Heidi Villalba, Taylor Liles, Thomas Abbruscato, Luca Cucullo
Cigarette smoking (CS) is associated with vascular endothelial dysfunction in a causative way primarily related to the TS content of reactive oxygen species (ROS), nicotine, and inflammation. TS promotes glucose intolerance and increases the risk of developing type-2 diabetes mellitus (2DM) with which it shares other pathogenic traits including the high risk of cerebrovascular and neurological disorders like stroke via ROS generation, inflammation, and blood-brain barrier (BBB) impairment. Herein we provide evidence of the role played by nuclear factor erythroid 2-related factor (Nrf2) in CS-induced cerebrobvascular/BBB impairments and how these cerebrovascular harmful effects can be circumvented by the use of metformin (MF; a widely prescribed, firstline anti-diabetic drug) treatment...
February 12, 2017: Redox Biology
https://www.readbyqxmd.com/read/28212453/bone-morphogenetic-protein-2-hybridized-with-nano-anchored-oligonucleotides-on-titanium-implants-enhances-osteogenic-differentiation-in-vivo
#2
Florian Böhrnsen, Jennifer Rublack, Nelia Aeckerle, Anne Foerster, Bernd Schwenzer, Judith Reichert, Dieter Scharnweber, Henning Schliephake
PURPOSE: Previous in vitro studies have shown that DNA oligonucleotides (ODN) can be successfully used as anchor strands for the binding and retarded release of biologically active recombinant human bone morphogenetic protein 2 (rhBMP-2). The aim of the present study was to test the hypothesis that rhBMP-2 bound to the surface of titanium implants through hybridization with nano-anchored ODN strands is biologically active and can enhance the induction of osteogenic markers in peri-implant bone in vivo...
February 17, 2017: International Journal of Oral & Maxillofacial Implants
https://www.readbyqxmd.com/read/28210620/association-of-ptpn22-haplotypes-1123g-c-1858c-t-with-rheumatoid-arthritis-in-western-mexican-population
#3
Yeniley Ruiz-Noa, Jorge Ramón Padilla-Gutiérrez, Jorge Hernández-Bello, Claudia Azucena Palafox-Sánchez, Yeminia Valle, Edith Oregón-Romero, Ana Laura Pereira-Suárez, Ana Guilaisne Bernard-Medina, José Francisco Muñoz-Valle
Rheumatoid arthritis (RA) is an autoimmune disease characterized by the presence of antibodies against cyclic citrullinated peptide (anti-CCP), a consequence of the breakdown of immune tolerance. The lymphoid tyrosine phosphatase (Lyp) protein has significant effects on maintenance of peripheral immune tolerance. Two polymorphic variants (-1123G>C and +1858C>T) at PTPN22 gene that encodes this protein have been associated with autoimmune disorders and found in strong linkage disequilibrium in Caucasian population...
2017: International Journal of Genomics
https://www.readbyqxmd.com/read/28209294/sulfated-glycosaminoglycans-and-non-classically-secreted-proteins-basic-fgf-and-epimorphin-coordinately-regulate-tgf-%C3%AE-induced-cell-behaviors-of-human-scar-dermal-fibroblasts
#4
Tomoatsu Horigome, Shinya Takumi, Kota Shirai, Takumi Kido, Natsumi Hagiwara-Chatani, Ayumi Nakashima, Naoki Adachi, Hiroko Yano, Yohei Hirai
BACKGROUND: Upon skin injuries, dermal fibroblasts actively produce transforming growth factor-β (TGF-β), which leads to the formation of α-smooth muscle actin (αSMA)-positive granulation tissues. The hyperplasia or incomplete regression of these tissues subsequently causes scar formation in the skin, where sulfated glycosaminoglycans (GAGs), side chains of unique proteoglycans, are supposed to play important roles. OBJECTIVE: The aim of this study is to clarify the effects of sulfated GAGs on dermal cell behaviors triggered by the TGF-β signaling, along with its possible regulators basic fibroblast growth factor (bFGF) and cell surface epimorphin...
February 3, 2017: Journal of Dermatological Science
https://www.readbyqxmd.com/read/28202715/updating-of-aversive-memories-after-temporal-error-detection-is-differentially-modulated-by-mtor-across-development
#5
Lucille Tallot, Lorenzo Diaz-Mataix, Rosemarie E Perry, Kira Wood, Joseph E LeDoux, Anne-Marie Mouly, Regina M Sullivan, Valérie Doyère
The updating of a memory is triggered whenever it is reactivated and a mismatch from what is expected (i.e., prediction error) is detected, a process that can be unraveled through the memory's sensitivity to protein synthesis inhibitors (i.e., reconsolidation). As noted in previous studies, in Pavlovian threat/aversive conditioning in adult rats, prediction error detection and its associated protein synthesis-dependent reconsolidation can be triggered by reactivating the memory with the conditioned stimulus (CS), but without the unconditioned stimulus (US), or by presenting a CS-US pairing with a different CS-US interval than during the initial learning...
March 2017: Learning & Memory
https://www.readbyqxmd.com/read/28194788/protein-kinase-a-regulates-c-terminally-truncated-cav-1-2-in-xenopus-oocytes-roles-of-n-and-c-termini-of-the-%C3%AE-1c-subunit
#6
Shimrit Oz, Ines Pankonien, Anouar Belkacemi, Veit Flockerzi, Enno Klussmann, Hannelore Haase, Nathan Dascal
β-Adrenergic stimulation enhances Ca(2+) currents via L-type, voltage-gated CaV 1.2 channels, strengthening cardiac contraction. The signaling via β-adrenergic receptors (β-ARs) involves elevation of cyclic AMP (cAMP) levels and activation of protein kinase A (PKA). However, how PKA affects the channel remains controversial. Recent studies in heterologous systems and genetically engineered mice stress the importance of the posttranslational proteolytic truncation of distal C-terminus (dCT) of the main (α1C ) subunit...
February 14, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/28191978/strong-isotope-effects-on-effective-interactions-and-phase-behavior-in-protein-solutions-in-the-presence-of-multivalent-ions
#7
Michal K Braun, Marcell Wolf, Olga Matsarskaia, Stefano Da Vela, Felix Roosen-Runge, Michael Sztucki, Roland Roth, Fajun Zhang, Frank Schreiber
In this article, we have studied the influence of the isotopic composition of the solvent (H2O or D2O) on the effective interactions and the phase behavior of the globular protein bovine serum albumin in solution with two trivalent salts (LaCl3 and YCl3). Protein solutions with both salts exhibit a reentrant condensation phase behavior. The condensed regime (regime II) in between two salt concentration boundaries (c* < cs < c**) is significantly broadened by replacing H2O with D2O. Within regime II, liquid-liquid phase separation (LLPS) occurs...
February 13, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28191901/increasing-the-genome-targeting-scope-and-precision-of-base-editing-with-engineered-cas9-cytidine-deaminase-fusions
#8
Y Bill Kim, Alexis C Komor, Jonathan M Levy, Michael S Packer, Kevin T Zhao, David R Liu
Base editing induces single-nucleotide changes in the DNA of living cells using a fusion protein containing a catalytically defective Streptococcus pyogenes Cas9, a cytidine deaminase, and an inhibitor of base excision repair. This genome editing approach has the advantage that it does not require formation of double-stranded DNA breaks or provision of a donor DNA template. Here we report the development of five C to T (or G to A) base editors that use natural and engineered Cas9 variants with different protospacer-adjacent motif (PAM) specificities to expand the number of sites that can be targeted by base editing 2...
February 13, 2017: Nature Biotechnology
https://www.readbyqxmd.com/read/28190633/novel-5-arylthio-5h-chromenopyridines-as-a-new-class-of-anti-fibrotic-agents
#9
Renukadevi Patil, Anandita Ghosh, Phoebus Sun Cao, Roger D Sommer, Kyle A Grice, Gulam Waris, Shivaputra Patil
Liver fibrosis is a critical wound healing response to chronic liver injury such as hepatitis C virus (HCV) infection. If persistent, liver fibrosis can lead to cirrhosis and hepatocellular carcinoma (HCC). The development of new therapies for preventing liver fibrosis and its progression to cancer associated with HCV infection remains a critical challenge. Identification of novel anti-fibrotic compounds will provide opportunities for innovative therapeutic intervention of HCV-mediated liver fibrosis. We designed and synthesized a focused set of 5-arylthio-5H-chromenopyridines as a new class of anti-fibrotic agents...
February 1, 2017: Bioorganic & Medicinal Chemistry Letters
https://www.readbyqxmd.com/read/28188238/vmp1-related-autophagy-induced-by-fructose-rich-diet-in%C3%A2-%C3%AE-cells-it-s-prevention-by-incretins
#10
Bárbara Maiztegui, Verónica Boggio, Carolina Lisi Román, Luis Emilio Flores, Héctor Del Zotto, Alejandro Ropolo, Daniel Grasso, María Inés Vaccaro, Juan José Gagliardino
Aim : To demonstrate the role of autophagy and incretins on fructose-induced alteration in β-cell mass and function. Methods : Normal Wistar rats were fed (3 weeks) with commercial diet without (C) or with 10% fructose in drinking water (F) alone or plus sitagliptin (CS and FS) or exendin-4 (CE and FE). Serum levels of metabolic/endocrine parameters, β-cell mass, morphology/ultrastructure and apoptosis, VMP1 expression and glucose-stimulated insulin secretion (GSIS) were studied. Complementary, islets isolated from normal rats were cultured (3 days) without (C) or with F and F plus exendin-4 (FE) or chloroquine (FCQ)...
February 10, 2017: Clinical Science (1979-)
https://www.readbyqxmd.com/read/28186169/functionalized-graphene-oxide-with-chitosan-for-protein-nanocarriers-to-protect-against-enzymatic-cleavage-and-retain-collagenase-activity
#11
Fatemeh Emadi, Abbas Amini, Ahmad Gholami, Younes Ghasemi
Proteins have short half-life because of enzymatic cleavage. Here, a new protein nanocarrier made of graphene oxide (GO) + Chitosan (CS) is proposed to successfully prevent proteolysis in protein and simultaneously retain its activity. Bovine serum albumin (BSA) and collagenase were loaded on GO and GO-CS to explore the stability and activity of proteins. SEM, AFM, TEM, DSC, UV-Vis, FT-IR, RBS, Raman, SDS-PAGE and zymography were utilized as characterization techniques. The protecting role of GO and GO-CS against enzymatic cleavage was probed by protease digestion analysis on BSA, where the protease solution was introduced to GO-BSA and GO-CS-BSA at 37 °C for 0...
February 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28183667/synergistic-acceleration-in-the-osteogenic-and-angiogenic-differentiation-of-human-mesenchymal-stem-cells-by-calcium-silicate-graphene-composites
#12
Ming-You Shie, Wei-Hung Chiang, I-Wen Peter Chen, Wen-Yi Liu, Yi-Wen Chen
Recent exciting findings of the biological interactions of graphene materials have shed light on potential biomedical applications of graphene-containing composites. Owing to the superior mechanical properties and low coefficient of thermal expansion, graphene has been widely used in the reinforcement of biocomposites. In the present study, various ratios of graphene (0.25wt%, 0.5wt% and 1.0wt%) were reinforced into calcium silicate (CS) for bone graft application. Results show that the graphene was embedded in the composites homogeneously...
April 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28181439/cryoem-structure-refinement-by-integrating-nmr-chemical-shifts-with-molecular-dynamics-simulations
#13
Juan R Perilla, Gongpu Zhao, Manman Lu, Jiying Ning, Guangjin Hou, In-Ja L Byeon, Angela M Gronenborn, Tatyana Polenova, Peijun Zhang
Single particle cryoEM has emerged as a powerful method for structure determination of proteins and complexes, complementing X-ray crystallography and NMR spectroscopy. Yet, for many systems, the resolution of cryoEM density map has been limited to 4-6 Å, which only allows for resolving bulky amino acids side chains, thus hindering accurate model building from the density map. On the other hand, experimental chemical shifts (CS) from solution and solid state MAS NMR spectra provide atomic level data for each amino acid within a molecule or a complex; however, structure determination of large complexes and assemblies based on NMR data alone remains challenging...
February 9, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/28181182/characteristics-of-retrograde-amnesia-for-cs-preexposure
#14
James F Briggs, Brian P Olson
Two experiments using rats evaluated the susceptibility of CS preexposure to retrograde amnesia induced by the protein synthesis inhibitor cycloheximide and tested whether amnesia for CS preexposure shares similar characteristics with amnesia for other memories. In Experiment 1, rats received cycloheximide either immediately, 60 minutes, or 120 minutes after preexposure. Following preexposure, rats received fear conditioning. When later tested, the subjects that received the amnestic treatment shortly after preexposure showed no CS preexposure effect (i...
February 8, 2017: Learning & Behavior
https://www.readbyqxmd.com/read/28177348/nutrient-digestibility-and-milk-production-responses-to-increasing-levels-of-palmitic-acid-supplementation-vary-in-cows-receiving-diets-with-or-without-whole-cottonseed
#15
J E Rico, J de Souza, M S Allen, A L Lock
Our study evaluated the dose-dependent effects of a palmitic acid-enriched supplement in basal diets with or without the inclusion of whole cottonseed on nutrient digestibility and production responses of dairy cows. Sixteen Holstein cows (149 ± 56 days in milk) were used in a split plot Latin square design experiment. Cows were blocked by 3.5% fat-corrected milk (FCM) and allocated to a main plot receiving either a basal diet with soyhulls (SH, = 8) or a basal diet with whole cottonseed (CS, = 8) that was fed throughout the experiment...
January 2017: Journal of Animal Science
https://www.readbyqxmd.com/read/28161643/sirt3-deacetylated-and-increased-citrate-synthase-activity-in-pd-model
#16
Xin-Xin Cui, Xuan Li, Su-Yan Dong, Yan-Jie Guo, Te Liu, Yun-Cheng Wu
SIRT3 have been found to be neuroprotective in many neurological diseases, but its detail mechanism is only partially understood. In this study, MPP(+) was used to treat SH-SY5Y cells as the cellular model of PD to test the role of SIRT3 and the mechanism may be involved in. We focused on the changes and relationship between SIRT3 and the key mitochondrial enzymes citrate synthase (CS) and isocitrate dehydrogenase 2 (IDH2). We found MPP(+) decreased SIRT3 expression. And our results showed that the enzymatic activities of CS and IDH2 were significantly reduced in MPP(+) treatment cells, while protein acetylation of CS and IDH2 increased...
February 2, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28155600/green-tea-camellia-sinensis-protects-against-arsenic-neurotoxicity-via-antioxidative-mechanism-and-activation-of-superoxide-dismutase-activity
#17
Smarajit Maiti, Nirmallya Acharyya, Tamal K Ghosh, Sk Sajed Ali, Emili Manna, Aarifa Nazmeen, Nirmalya K Sinha
BACKGROUND: Chronic arsenic-exposure even at a low-dose results in the neural impairment and motor/cognitive dysfunction. However, several preventive approaches are made mainly against hepatic/gastrointestinal damages. Only a few investigations postulate therapeutic strategies for neural anomalies. Here, the protective role of Green tea (Camellia sinensis or CS; 10mg/ml aqueous) has been evaluated against arsenic-induced (0.6ppm/100g bw/28 days) cerebral/cerebellar tissue degeneration, oxidative-threats and neurotransmitter deregulation in female rats...
February 1, 2017: Central Nervous System Agents in Medicinal Chemistry
https://www.readbyqxmd.com/read/28151637/interaction-of-zika-virus-envelope-protein-with-glycosaminoglycans
#18
So Young Kim, Jing Zhao, Xinyue Liu, Keith Fraser, Lei Lin, Xing Zhang, Fuming Zhang, Jonathan S Dordick, Robert J Linhardt
In February 2016, the World Health Organization declared a Public Health Emergency of International Concern on Zika Virus (ZIKV), due to its association with severe fetal anomalies of congenitally infected humans. This has led to urgent efforts by academic, federal, and industry research groups to better understand pathogenesis of ZIKV and to developing detection methods, therapeutic strategies and vaccines. Although we still do not have the entire picture of the pathogenesis of ZIKV, extensive research has been conducted on related pathogenic flaviviruses (i...
February 2, 2017: Biochemistry
https://www.readbyqxmd.com/read/28150141/role-of-second-hand-smoke-shs-induced-proteostasis-autophagy-impairment-in-pediatric-lung-diseases
#19
Neel Patel, Christopher D Trumph, Manish Bodas, Neeraj Vij
BACKGROUND: Exposure to second-hand tobacco smoke (SHS) is one of the prime risk factors for chronic lung disease development. Smoking during pregnancy may lead to birth defects in the newborn that include pulmonary dysfunction, increased susceptibility to opportunistic pathogens, or initiation of childhood respiratory manifestations such as bronchopulmonary dysplasia (BPD). Moreover, exposure to SHS in early childhood can have negative impact on lung health, although the exact mechanisms are unclear...
December 2017: Molecular and Cellular Pediatrics
https://www.readbyqxmd.com/read/28143460/chlorella-sorokiniana-induces-mitochondrial-mediated-apoptosis-in-human-non-small-cell-lung-cancer-cells-and-inhibits-xenograft-tumor-growth-in-vivo
#20
Ping-Yi Lin, Ching-Tsan Tsai, Wan-Ling Chuang, Ya-Hsuan Chao, I-Horng Pan, Yu-Kuo Chen, Chi-Chen Lin, Bing-Yen Wang
BACKGROUND: Lung cancer is one of the leading causes of cancer related deaths worldwide. Marine microalgae are a source of biologically active compounds and are widely consumed as a nutritional supplement in East Asian countries. It has been reported that Chlorella or Chlorella extracts have various beneficial pharmacological compounds that modulate immune responses; however, no studies have investigated the anti-cancer effects of Chlorella sorokiniana (CS) on non-small cell lung cancer (NSCLC)...
February 1, 2017: BMC Complementary and Alternative Medicine
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