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https://www.readbyqxmd.com/read/28648037/-effects-of-activating-silent-information-regulator-1-on-early-kidney-damage-in-rats-with-severe-burn
#1
X Z Bai, T He, Y Liu, W Zhang, F Han, C Yang, W X Cai, Y H Jia, J H Shi, J T Han, L L Su, D H Hu
Objective: To investigate the effects of activating silent information regulator 1 (SIRT1) on the early kidney damage in rats with severe burn. Methods: Thirty healthy male SD rats were divided into sham injury group (SI), pure burn group (PB), and SIRT1 activator group (SA) according to the random number table, with 10 rats in each group. Rats in groups PB and SA were inflicted with 30% total body surface area full-thickness scald (hereinafter referred to as burn) on the back. Immediately after injury, rats in group PB were intraperitoneally injected with normal saline in the dosage of 50 mL/kg, and those in group SA with 1 mg/mL (final mass concentration) resveratrol in the dosage of 50 mL/kg...
June 20, 2017: Zhonghua Shao Shang za Zhi, Zhonghua Shaoshang Zazhi, Chinese Journal of Burns
https://www.readbyqxmd.com/read/28647540/reversible-swelling-of-sbmv-is-associated-with-reversible-disordering
#2
Jade Li, Carl Fricks, Donald L D Caspar, Ivan Rayment
The structures of the compact and swollen southern bean mosaic virus (SBMV) particles have been compared by X-ray diffraction and proton magnetic resonance (PMR). Small-angle X-ray scattering showed that removal of divalent cations at alkaline pH causes the particle diameter to increase from 289Å in the native SBMV by 12% in solution and by 9% in microcrystals. The swelling is fully reversible upon re-addition of Ca(2+)and Mg(2+) ions, as shown by the X-ray patterns at 6 Å resolution and by the 270 MHz PMR spectra...
June 21, 2017: Journal of Structural Biology
https://www.readbyqxmd.com/read/28647331/combination-of-histidine-lysine-methionine-and-leucine-promotes-%C3%AE-casein-synthesis-via-the-mechanistic-target-of-rapamycin-signaling-pathway-in-bovine-mammary-epithelial-cells
#3
H N Gao, S G Zhao, N Zheng, Y D Zhang, S S Wang, X Q Zhou, J Q Wang
The ratio of different AA in the diets of cows is vital to improve milk protein yield. β-Casein is one of the important milk proteins with high nutritive value. However, the suitable ratio of essential amino acids (EAA) for the expression of β-casein in the immortalized bovine mammary epithelial cell line is not fully characterized. This study employed response surface methodology to determine the optimal ratio of His, Lys, Met, and Leu on β-casein expression level in vitro and clarified the effect of the 4 EAA on β-casein via the mechanistic target of rapamycin (mTOR) signaling pathway...
June 21, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28646583/sebum-lipids-influence-macrophage-polarization-and-activation
#4
M Lovászi, M Mattii, K Eyerich, Attila Gácsi, Erzsébet Csányi, D Kovács, R Rühl, A Szegedi, L Kemény, M Ståhle, C C Zouboulis, S Eyerich, D Törőcsik
BACKGROUND: As lipids are known to regulate macrophage functions it is reasonable to suppose that a sebocyte - macrophage axis mediated by sebum lipids may exist. OBJECTIVE: To investigate if sebocytes could contribute to the differentiation, polarization and function of macrophages with their secreted lipids. METHODS: Oil-red-O lipid staining and Raman spectroscopy were used to assess the dermal lipid content and penetration. Immunohistochemistry was used to analyse the macrophage subsets...
June 24, 2017: British Journal of Dermatology
https://www.readbyqxmd.com/read/28646324/expression-purification-and-characterization-of-gmz2-10c-a-complex-disulphide-bonded-fusion-protein-vaccine-candidate-against-the-asexual-and-sexual-life-stages-of-the-malaria-causing-plasmodium-falciparum-parasite
#5
Ulrik H Mistarz, Susheel K Singh, Tam T T N Nguyen, Will Roeffen, Fen Yang, Casper Lissau, Søren M Madsen, Astrid Vrang, Régis W Tiendrebeogo, Ikhlaq H Kana, Robert W Sauerwein, Michael Theisen, Kasper D Rand
PURPOSE: Production and characterization of a chimeric fusion protein (GMZ2'.10C) which combines epitopes of key malaria parasite antigens: glutamate-rich protein (GLURP), merozoite surface protein 3 (MSP3), and the highly disulphide bonded Pfs48/45 (10C). GMZ2'.10C is a potential candidate for a multi-stage malaria vaccine that targets both transmission and asexual life-cycle stages of the parasite. METHODS: GMZ2'.10C was produced in Lactococcus lactis and purified using either an immunoaffinity purification (IP) or a conventional purification (CP) method...
June 23, 2017: Pharmaceutical Research
https://www.readbyqxmd.com/read/28646271/characterization-of-adipose-derived-stem-cells-following-burn-injury
#6
Anesh Prasai, Amina El Ayadi, Randy C Mifflin, Michael D Wetzel, Clark R Andersen, Heinz Redl, David N Herndon, Celeste C Finnerty
Severe burns induce a prolonged inflammatory response in subcutaneous adipose tissue that modulates signaling in adipose-derived stem cells (ASCs), which hold potential for healing burn wounds or generating skin substitutes. Using a 60% rat scald burn model, we conducted a series of experiments to determine which cells isolated from the adipose tissue produced inflammatory mediators and how these changes affect ASC fate and function. The stromal vascular fraction (SVF), adipocytes, and ASCs were isolated from adipose tissue at varying times up to 4 weeks postburn and from non-injured controls...
June 23, 2017: Stem Cell Reviews
https://www.readbyqxmd.com/read/28646109/bone-morphogenetic-protein-bmp-9-and-bmp10-enhance-tumor-necrosis-factor-%C3%AE-induced-monocyte-recruitment-to-the-vascular-endothelium-mainly-via-activin-receptor-like-kinase-2
#7
Claudia-Gabriela Mitrofan, Sarah L Appleby, Gerard B Nash, Ziad Mallat, Edwin R Chilvers, Paul D Upton, Nicholas W Morrell
Bone morphogenetic proteins 9 and 10 (BMP9/BMP10) are circulating cytokines with important roles in endothelial homeostasis. The aim of this study was to investigate the roles of BMP9 and BMP10 in mediating monocyte-endothelial interactions using an in vitro flow adhesion assay. Herein, we report that while BMP9/BMP10 alone had no effect on monocyte recruitment, at higher concentrations both cytokines synergised with Tumor necrosis factor-α (TNFα) to increase recruitment to the vascular endothelium. The BMP9/BMP10-mediated increase in monocyte recruitment in the presence of TNFα was associated with upregulated expression levels of E-selectin, VCAM-1 and ICAM-1 on endothelial cells...
June 23, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28646020/mcam-mediates-chemoresistance-in-small-cell-lung-cancer-via-the-pi3k-akt-sox2-signaling-pathway
#8
Satyendra C Tripathi, Johannes F Fahrmann, Muge Celiktas, Mitzi Aguilar, Kieren D Marini, Mohit Kumar Jolly, Hiroyuki Katayama, Hong Wang, Eunice N Murage, Jennifer B Dennison, D Neil Watkins, Herbert Levine, Edwin J Ostrin, Ayumu Taguchi, Samir M Hanash
Despite favorable responses to initial therapy, small cell lung cancer (SCLC) relapse occurs within a year and exhibits resistance to multiple drugs. Due to limited accessibility of patient tissues for research purposes, SCLC-patient derived xenografts (PDX) have provided the best opportunity to address this limitation. Here we sought to identify novel mechanisms involved in SCLC chemoresistance. Through in-depth proteomic profiling, we identified MCAM as a markedly upregulated surface receptor in chemoresistant SCLC cell lines and in chemoresistant PDX compared to matched treatment-naïve tumors...
June 23, 2017: Cancer Research
https://www.readbyqxmd.com/read/28644439/activation-of-cell-surface-grp78-decreases-endoplasmic-reticulum-stress-and-neuronal-death
#9
Morgane Louessard, Isabelle Bardou, Eloïse Lemarchand, Audrey M Thiebaut, Jérôme Parcq, Jérôme Leprince, Anne Terrisse, Valérie Carraro, Pierre Fafournoux, Alain Bruhat, Cyrille Orset, Denis Vivien, Carine Ali, Benoit D Roussel
The unfolded protein response (UPR) is an endoplasmic reticulum (ER) -related stress conserved pathway that aims to protect cells from being overwhelmed. However, when prolonged, UPR activation converts to a death signal, which relies on its PERK-eIF2α branch. Overactivation of the UPR has been implicated in many neurological diseases, including cerebral ischaemia. Here, by using an in vivo thromboembolic model of stroke on transgenic ER stress-reporter mice and neuronal in vitro models of ischaemia, we demonstrate that ischaemic stress leads to the deleterious activation of the PERK branch of the UPR...
June 23, 2017: Cell Death and Differentiation
https://www.readbyqxmd.com/read/28642848/mycobacterium-tuberculosis-glyceraldehyde-3-phosphate-dehydrogenase-gapdh-functions-as-a-receptor-for-human-lactoferrin
#10
Himanshu Malhotra, Anil Patidar, Vishant M Boradia, Rajender Kumar, Rakesh D Nimbalkar, Ajay Kumar, Zahid Gani, Rajbeer Kaur, Prabha Garg, Manoj Raje, Chaaya I Raje
Iron is crucial for the survival of living cells, particularly the human pathogen Mycobacterium tuberculosis (M.tb) which uses multiple strategies to acquire and store iron. M.tb synthesizes high affinity iron chelators (siderophores), these extract iron from host iron carrier proteins such as transferrin (Tf) and lactoferrin (Lf). Recent studies have revealed that M.tb may also relocate several housekeeping proteins to the cell surface for capture and internalization of host iron carrier protein transferrin...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28642196/gdf5-significantly-augments-the-bone-formation-induced-by-an-injectable-plga-fiber-reinforced-brushite-forming-cement-in-a-sheep-defect-model-of-lumbar-osteopenia
#11
Matthias Bungartz, Elke Kunisch, Stefan Maenz, Victoria Horbert, Long Xin, Francesca Gunnella, Joerg Mika, Juliane Borowski, Sabine Bischoff, Harald Schubert, Andre Sachse, Bernhard Illerhaus, Jens Günster, Jörg Bossert, Klaus D Jandt, Frank Plöger, Raimund W Kinne, Olaf Brinkmann
BACKGROUND CONTEXT: Biodegradable calcium phosphate cement (CPC) represents a promising option for the surgical treatment of osteoporotic vertebral fractures. Due to augmented local bone catabolism, however, additional targeted delivery of bone morphogenetic proteins with the CPC may be needed to promote rapid and complete bone regeneration. PURPOSE: In the present study, an injectable, poly (l-lactide-co-glycolide) acid (PLGA)-fiber reinforced, brushite-forming cement (CPC) containing the bone morphogenetic protein GDF5 was tested in a sheep lumbar osteopenia model...
June 19, 2017: Spine Journal: Official Journal of the North American Spine Society
https://www.readbyqxmd.com/read/28638920/-a-study-on-toxic-effects-of-sodium-salicylate-on-rat-cochlear-spiral-ganglion-neurons-dopamine-receptors-mediate-expressions-of-nmda-and-gabaa-receptors
#12
Ting-Jia Wei, Hui-Ying Chen, Xi Huang, Jing-Jin Weng, Jiang-Yuan Qin, Ji-Ping Su
The aim of the present study was to observe whether dopamine receptor (DR) was involved in the effects of sodium salicylate (SS) on the expressions of N-methyl-D-aspartic acid (NMDA) and γ-aminobutyric acid (GABA) receptors in rat cochlear spiral ganglion neurons (SGNs). Forty-eight hours after primary culture of rat SGNs, immunofluorescence technique was applied to detect expressions of DR1 and DR2, the two subtypes of dopamine receptors. Western blot was performed to assess NMDA receptor NR1 subunit and GABAA receptor subunit α2 (GABRα2) protein expressions in the SGNs after the treatments of SS alone or in combination with DR antagonists...
June 25, 2017: Sheng Li Xue Bao: [Acta Physiologica Sinica]
https://www.readbyqxmd.com/read/28637896/technical-advance-new-in-vitro-method-for-assaying-the-migration-of-primary-b-cells-using-an-endothelial-monolayer-as-substrate
#13
Phillip J Stewart-Hutchinson, Taylor P Szasz, Emily R Jaeger, Michael D Onken, John A Cooper, Sharon Celeste Morley
Migration of B cells supports their development and recruitment into functional niches. Therefore, defining factors that control B cell migration will lead to a better understanding of adaptive immunity. In vitro cell migration assays with B cells have been limited by poor adhesion of cells to glass coated with adhesion molecules. We have developed a technique using monolayers of endothelial cells as the substrate for B cell migration and used this technique to establish a robust in vitro assay for B cell migration...
June 21, 2017: Journal of Leukocyte Biology
https://www.readbyqxmd.com/read/28637278/functional-and-structural-analysis-of-at-specific-minor-groove-binders-that-disrupt-dna-protein-interactions-and-cause-disintegration-of-the-trypanosoma-brucei-kinetoplast
#14
Cinthia R Millan, Francisco J Acosta-Reyes, Laura Lagartera, Godwin U Ebiloma, Leandro Lemgruber, J Jonathan Nué Martínez, Núria Saperas, Christophe Dardonville, Harry P de Koning, J Lourdes Campos
Trypanosoma brucei, the causative agent of sleeping sickness (Human African Trypanosomiasis, HAT), contains a kinetoplast with the mitochondrial DNA (kDNA), comprising of >70% AT base pairs. This has prompted studies of drugs interacting with AT-rich DNA, such as the N-phenylbenzamide bis(2-aminoimidazoline) derivatives 1 [4-((4,5-dihydro-1H-imidazol-2-yl)amino)-N-(4-((4,5-dihydro-1H-imidazol-2-yl)amino)phenyl)benzamide dihydrochloride] and 2 [N-(3-chloro-4-((4,5-dihydro-1H-imidazol-2-yl)amino)phenyl)-4-((4,5-dihydro-1H-imidazol-2-yl)amino)benzamide] as potential drugs for HAT...
June 16, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/28636406/protective-effect-of-intravitreal-administration-of-exosomes-derived-from-mesenchymal-stem-cells-on-retinal-ischemia
#15
Elad Moisseiev, Johnathon D Anderson, Sharon Oltjen, Mayank Goswami, Robert J Zawadzki, Jan A Nolta, Susanna S Park
PURPOSE: Exosomes derived from human mesenchymal stem cells (hMSCs) cultured under hypoxic conditions contain proteins and growth factors that promote angiogenesis. This study investigated the effect of intravitreal administration of these exosomes on retinal ischemia using a murine model. METHODS: Oxygen-induced retinopathy (OIR) was induced by exposing one-week-old male C57BL/6J mice to 5 days of 75% hyperoxic conditioning, and returning to room air. After hyperoxic conditioning, the right eye of each mouse was injected intravitreally with 1 µl saline or exosomes derived from hMSCs and compared to control mice of the same age raised in room air without OIR injected intravitreally with saline...
June 21, 2017: Current Eye Research
https://www.readbyqxmd.com/read/28633281/the-sweet-side-of-the-pathogenic-neisseria-the-role-of-glycan-interactions-in-colonisation-and-disease
#16
Tsitsi D Mubaiwa, Evgeny A Semchenko, Lauren E Hartley-Tassell, Christopher J Day, Michael P Jennings, Kate L Seib
Glycomics is a rapidly growing field that focuses on the structure and function of carbohydrates (glycans) in biological systems. Glycan interactions play a major role in infectious disease, at all stages of colonisation and disease progression. Neisseria meningitidis, the cause of meningococcal sepsis and meningitis, and Neisseria gonorrhoeae, which causes the sexually transmitted infection gonorrhoea, are responsible for significant morbidity and mortality worldwide. N. meningitidis displays a range of surface glycosylations including capsule polysaccharide, lipooligosaccharide and O-linked glycoproteins...
June 13, 2017: Pathogens and Disease
https://www.readbyqxmd.com/read/28631593/a-denv-2-type-specific-monoclonal-antibody-binds-to-the-denv-complex-reactive-antigenic-site-on-envelope-protein-domain-3
#17
Vanessa V Sarathy, Trevor J Pitcher, Gregory D Gromowski, John T Roehrig, Alan D T Barrett
The Dengue virus (DENV) envelope (E) protein is the major component of the viral surface and is structurally subdivided into three domains, ED1, ED2 and ED3. ED3 elicits potent neutralizing antibodies and contains two major antigenic sites: the DENV-type-specific and DENV-complex-reactive antigenic sites. Each site is composed of a limited subset of residues that are required for monoclonal antibody (mAb) binding. Here we show that DENV-2-type-specific mAb 9A3D-8 utilizes the functionally critical residues K307, V308, K310, I312, P332, L387, L389 and N390 for ED3 binding...
June 20, 2017: Journal of General Virology
https://www.readbyqxmd.com/read/28630422/basic-surface-features-of-nuclear-fkbps-facilitate-chromatin-binding
#18
Andrew Leung, Francy-Pesek Jardim, Neda Savic, Yoan R Monneau, Rodrigo González-Romero, Geoff Gudavicius, Jose M Eirin-Lopez, Till Bartke, Cameron D Mackereth, Juan Ausió, Christopher J Nelson
The nucleoplasmin family of histone chaperones is identified by a pentamer-forming domain and multiple acidic tracts that mediate histone binding and chaperone activity. Within this family, a novel domain organization was recently discovered that consists of an N-terminal nucleoplasmin-like (NPL) domain and a C-terminal FKBP peptidyl-proline isomerase domain. Saccharomyces cerevisiae Fpr4 is one such protein. Here we report that in addition to its known histone prolyl isomerase activities, the Fpr4 FKBP domain binds to nucleosomes and nucleosome arrays in vitro...
June 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28628042/a-therapeutic-t-cell-receptor-mimic-antibody-targets-tumor-associated-prame-peptide-hla-i-antigens
#19
Aaron Y Chang, Tao Dao, Ron S Gejman, Casey A Jarvis, Andrew Scott, Leonid Dubrovsky, Melissa D Mathias, Tatyana Korontsvit, Victoriya Zakhaleva, Michael Curcio, Ronald C Hendrickson, Cheng Liu, David A Scheinberg
Preferentially expressed antigen in melanoma (PRAME) is a cancer-testis antigen that is expressed in many cancers and leukemias. In healthy tissue, PRAME expression is limited to the testes and ovaries, making it a highly attractive cancer target. PRAME is an intracellular protein that cannot currently be drugged. After proteasomal processing, the PRAME300-309 peptide ALYVDSLFFL (ALY) is presented in the context of human leukocyte antigen HLA-A*02:01 molecules for recognition by the T cell receptor (TCR) of cytotoxic T cells...
June 19, 2017: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/28627360/the-plasmodium-falciparum-exported-protein-pf3d7_0402000-binds-to-erythrocyte-ankyrin-and-band-4-1
#20
Bikash Shakya, Wesley D Penn, Ernesto S Nakayasu, Douglas J LaCount
Plasmodium falciparum extensively modifies the infected red blood cell (RBC), resulting in changes in deformability, shape and surface properties. These alterations suggest that the RBC cytoskeleton is a major target for modification during infection. However, the molecular mechanisms leading to these changes are largely unknown. To begin to address this question, we screened for exported P. falciparum proteins that bound to the erythrocyte cytoskeleton proteins ankyrin 1 (ANK1) and band 4.1 (4.1R), which form critical interactions with other cytoskeletal proteins that contribute to the deformability and stability of RBCs...
June 13, 2017: Molecular and Biochemical Parasitology
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