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https://www.readbyqxmd.com/read/29331666/age-related-oxidative-changes-in-pancreatic-islets-are-predominantly-located-in-the-vascular-system
#1
Richard Kehm, Jeannette König, Kerstin Nowotny, Tobias Jung, Stephanie Deubel, Sabrina Gohlke, Tim Julius Schulz, Annika Höhn
Aged tissues usually show a decreased regenerative capacity accompanied by a decline in functionality. During aging pancreatic islets also undergo several morphological and metabolic changes. Besides proliferative and regenerative limitations, endocrine cells lose their secretory capacity, contributing to a decline in functional islet mass and a deregulated glucose homeostasis. This is linked to several features of aging, such as induction of cellular senescence or the formation of modified proteins, such as advanced glycation end products (AGEs) - the latter mainly examined in relation to hyperglycemia and in disease models...
December 29, 2017: Redox Biology
https://www.readbyqxmd.com/read/29331090/enhanced-chondrogenesis-of-mesenchymal-stem-cells-over-silk-fibroin-chitosan-chondroitin-sulfate-three-dimensional-scaffold-in-dynamic-culture-condition
#2
Parinita Agrawal, Krishna Pramanik, Varshini Vishwanath, Amit Biswas, Akalabya Bissoyi, Pradeep Kumar Patra
Chondroitin sulfate (Ch) is one of the main structural components of cartilage tissue, therefore, its presence in tissue engineered scaffold is expected to enhance cartilage regeneration. Previously, silk fibroin/chitosan (SF/CS) blend was proven to be a potential biomaterial for tissue development. In this study, the effect of Ch on physicochemical and biological properties of SF/CS blend was investigated and scaffolds with 0.8 wt% Ch was found to be favorable. The scaffolds possess pore size of 37-212 µm, contact angle 46...
January 13, 2018: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/29330461/comparing-olive-oil-and-c4-dietary-oil-a-prodrug-for-the-gpr119-agonist-2-oleoyl-glycerol-less-energy-intake-of-the-latter-is-needed-to-stimulate-incretin-hormone-secretion-in-overweight-subjects-with-type-2-diabetes
#3
Mette Johannsen Mandøe, Katrine Bagge Hansen, Johanne Agerlin Windeløv, Filip Krag Knop, Jens Frederik Rehfeld, Mette Marie Rosenkilde, Jens Juul Holst, Harald Severin Hansen
BACKGROUND/OBJECTIVE: After digestion, dietary triacylglycerol stimulates incretin release in humans, mainly through generation of 2-monoacylglycerol, an agonist for the intestinal G protein-coupled receptor 119 (GPR119). Enhanced incretin release may have beneficial metabolic effects. However, dietary fat may promote weight gain and should therefore be restricted in obesity. We designed C4-dietary oil (1,3-di-butyryl-2-oleoyl glycerol) as a 2-oleoyl glycerol (2-OG)-generating fat type, which would stimulate incretin release to the same extent while providing less calories than equimolar amounts of common triglycerides, e...
January 12, 2018: Nutrition & Diabetes
https://www.readbyqxmd.com/read/29330256/osteoprotegerin-is-associated-with-major-bleeding-but-not-with-cardiovascular-outcomes-in-patients-with-acute-coronary-syndromes-insights-from-the-plato-platelet-inhibition-and-patient-outcomes-trial
#4
Thor Ueland, Axel Åkerblom, Tatevik Ghukasyan, Annika E Michelsen, Pål Aukrust, Richard C Becker, Maria Bertilsson, Anders Himmelmann, Stefan K James, Agneta Siegbahn, Robert F Storey, Frederic Kontny, Lars Wallentin
BACKGROUND: Elevated levels of osteoprotegerin, a secreted tumor necrosis factor-related molecule, might be associated with adverse outcomes in patients with coronary artery disease. We measured plasma osteoprotegerin concentrations on hospital admission, at discharge, and at 1 and 6 months after discharge in a predefined subset (n=5135) of patients with acute coronary syndromes in the PLATO (Platelet Inhibition and Patient Outcomes) trial. METHODS AND RESULTS: The associations between osteoprotegerin and the composite end point of cardiovascular death, nonprocedural spontaneous myocardial infarction or stroke, and non-coronary artery bypass grafting major bleeding during 1 year of follow-up were assessed by Cox proportional hazards models...
January 12, 2018: Journal of the American Heart Association
https://www.readbyqxmd.com/read/29330036/regulation-of-fibrotic-changes-by-the-synergistic-effects-of-cytokines-dimensionality-and-matrix-towards-the-development-of-an-in-vitro-human-dermal-hypertrophic-scar-model
#5
Shikha Chawla, Sourabh Ghosh
Current therapeutic strategies to reduce scarring in full thickness skin defect offer limited success due to poor understanding of scar tissue formation and the underlying signaling pathways. There is an urgent need to develop human cell based in vitro scar tissue models as animal testing is associated with ethical and logistic complications and inter-species variations. Pro-inflammatory cytokines play critical role in regulating scar development through complex interplay and interaction with the ECM and corresponding signaling pathways...
January 9, 2018: Acta Biomaterialia
https://www.readbyqxmd.com/read/29329580/evidence-for-the-activation-of-pyroptotic-and-apoptotic-pathways-in-rpe-cells-associated-with-nlrp3-inflammasome-in-the-rodent-eye
#6
Jiangyuan Gao, Jing Z Cui, Eleanor To, Sijia Cao, Joanne A Matsubara
BACKGROUND: Age-related macular degeneration (AMD) is a devastating eye disease causing irreversible vision loss in the elderly. Retinal pigment epithelium (RPE), the primary cell type that is afflicted in AMD, undergoes programmed cell death in the late stages of the disease. However, the exact mechanisms for RPE degeneration in AMD are still unresolved. The prevailing theories consider that each cell death pathway works independently and without regulation of each other. Building upon our previous work in which we induced a short burst of inflammasome activity in vivo, we now investigate the effects of prolonged inflammasome activity on RPE cell death mechanisms in rats...
January 12, 2018: Journal of Neuroinflammation
https://www.readbyqxmd.com/read/29327237/regional-age-and-respiratory-secretion-specific-prevalence-of-respiratory-viruses-associated-with-asthma-exacerbation-a-literature-review
#7
REVIEW
Xue-Yan Zheng, Yan-Jun Xu, Wei-Jie Guan, Li-Feng Lin
Despite increased understanding of how viral infection is involved in asthma exacerbations, it is less clear which viruses are involved and to what extent they contribute to asthma exacerbations. Here, we sought to determine the prevalence of different respiratory viruses during asthma exacerbations. Systematic computerized searches of the literature up to June 2017 without language limitation were performed. The primary focus was on the prevalence of respiratory viruses, including AdV (adenovirus), BoV (bocavirus), CoV (coronavirus), CMV (cytomegalovirus), EnV (enterovirus), HSV (herpes simplex virus), IfV (influenza virus), MpV (metapneumovirus), PiV (parainfluenzavirus), RV (rhinovirus) and RSV (respiratory syncytial virus) during asthma exacerbations...
January 11, 2018: Archives of Virology
https://www.readbyqxmd.com/read/29323152/unravelling-the-effects-of-mechanical-physiological-conditioning-on-cardiac-adipose-tissue-derived-progenitor-cells-in-vitro-and-in-silico
#8
Aida Llucià-Valldeperas, Ramon Bragós, Carolina Soler-Botija, Santiago Roura, Carolina Gálvez-Montón, Cristina Prat-Vidal, Isaac Perea-Gil, Antoni Bayes-Genis
Mechanical conditioning is incompletely characterized for stimulating therapeutic cells within the physiological range. We sought to unravel the mechanism of action underlying mechanical conditioning of adipose tissue-derived progenitor cells (ATDPCs), both in vitro and in silico. Cardiac ATDPCs, grown on 3 different patterned surfaces, were mechanically stretched for 7 days at 1 Hz. A custom-designed, magnet-based, mechanical stimulator device was developed to apply ~10% mechanical stretching to monolayer cell cultures...
January 11, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29321259/plasmacytoid-dendritic-cells-promote-systemic-sclerosis-with-a-key-role-for-tlr8
#9
Marie Dominique Ah Kioon, Claudio Tripodo, David Fernandez, Kyriakos A Kirou, Robert F Spiera, Mary K Crow, Jessica K Gordon, Franck J Barrat
Systemic sclerosis (SSc) is a multisystem life-threatening fibrosing disorder that lacks effective treatment. The link between the inflammation observed in organs such as the skin and profibrotic mechanisms is not well understood. The plasmacytoid dendritic cell (pDC) is a key cell type mediating Toll-like receptor (TLR)-induced inflammation in autoimmune disease patients, including lupus and skin diseases with interface dermatitis. However, the role of pDCs in fibrosis is less clear. We show that pDCs infiltrate the skin of SSc patients and are chronically activated, leading to secretion of interferon-α (IFN-α) and CXCL4, which are both hallmarks of the disease...
January 10, 2018: Science Translational Medicine
https://www.readbyqxmd.com/read/29321129/novel-reversible-model-of-atherosclerosis-and-regression-using-oligonucleotide-regulation-of-the-ldl-receptor
#10
Debapriya Basu, Yunying Hu, Lesley-Ann Huggins, Adam E Mullick, Mark J Graham, Tomasz A Wietecha, Shelley L Barnhart, Allison Mogul, Katharina Pfeiffer, Andreas Zirlik, Edward A Fisher, Karin E Bornfeldt, Florian Willecke, Ira J Goldberg
Rationale: Animal models have been used to explore factors that regulate atherosclerosis. More recently, they have been used to study the factors that promote loss of macrophages and reduction in lesion size after lowering of plasma cholesterol levels. However, current animal models of atherosclerosis regression require challenging surgeries, time-consuming breeding strategies, and/or methods that block liver lipoprotein secretion. Objective: We sought to develop a more direct and time-effective method to create and then reverse hypercholesterolemia as well as atherosclerosis via transient knockdown of the hepatic LDL receptor (LDLR) followed by its rapid restoration...
January 10, 2018: Circulation Research
https://www.readbyqxmd.com/read/29320718/adiposity-and-family-history-of-type-2-diabetes-in-an-admixed-population-of-adolescents-associations-with-insulin-sensitivity-beta-cell-function-and-hepatic-insulin-extraction-in-brams-study
#11
Daniella F Camilo, Ana Carolina J Vasques, Keila Hayashi, Andrea Tura, Cleliani de Cassia da Silva, Mariana P Zambon, Maria Ângela R de G Monteiro Antônio, Bruno Geloneze
AIMS: Insulin resistance and beta-cell dysfunction manifest differently across racial/ethnic groups, and there is a lack of knowledge regarding the pathophysiology of type 2 diabetes mellitus (T2DM) for ethnically admixed adolescents. This study aimed to investigate the influence of adiposity and family history (FH) of T2DM on aspects of insulin sensitivity, beta-cell function, and hepatic insulin extraction in Brazilian adolescents. METHODS: A total of 82 normoglycemic adolescents were assessed...
January 7, 2018: Diabetes Research and Clinical Practice
https://www.readbyqxmd.com/read/29319835/gastrisk-bypass-fyller-50-%C3%A3-r-fetmaoperationen-som-visade-sig-fungera-mot-diabetes
#12
Per Videhult
Mason performed the first gastric bypass (GBP) for obesity in 1967 after having observed substantial weight loss in patients operated for gastric ulcer.  The weight loss after GBP is 30 % and 2/3 of patients with type II diabetes can stop their medication. Half of the patients can stop medication for hypertension or hyperlipidemia, 75% are cured from reflux and obstructive sleep apnea. GBP prolongs survival especially among diabetics. Restriction and malabsorption is of minor importance for weight loss. The mechanisms underlying weight loss and diabetes remissions are endocrine...
January 9, 2018: Läkartidningen
https://www.readbyqxmd.com/read/29317968/b-type-natriuretic-peptide-a-predictor-for-mortality-intensive-care-unit-length-of-stay-and-hospital-length-of-stay-in-patients-with-resolving-sepsis
#13
Harsimar Singh, Daryl Ramai, Harshil Patel, Marina Iskandir, Sarina Sachdev, Rabjot Rai, Jay Patolia, Getaw Worku Hassen
Background: B-type natriuretic peptide (BNP) is a hormone secreted by cardiomyocytes in response to myocardial ischemia, increased ventricular wall tension, and overload. BNP is utilized as a diagnostic and prognostic marker in congested heart failure (CHF). Its prognostic value in sepsis is unknown. The aim of this study is to determine if BNP correlates with increased in-hospital mortality for septic patients. Methods: This was a retrospective study of 505 patients admitted for sepsis or severe sepsis or septic shock during the period of January 2013 and August 2014...
December 2017: Cardiology Research
https://www.readbyqxmd.com/read/29317357/novel-identified-aluminum-hydroxide-induced-pathways-proof-monocyte-activation-and-pro-inflammatory-preparedness
#14
Sietske Kooijman, Jolanda Brummelman, Cécile A C M van Els, Fabio Marino, Albert J R Heck, Geert P M Mommen, Bernard Metz, Gideon F A Kersten, Jeroen L A Pennings, Hugo D Meiring
Aluminum-based adjuvants are the most widely used adjuvants in human vaccines. A comprehensive understanding of the mechanism of action of aluminum adjuvants at the molecular level, however, is still elusive. Here, we unravel the effects of aluminum hydroxide Al(OH)3 by a systems-wide analysis of the Al(OH)3-induced monocyte response. Cell response analysis by cytokine release was combined with (targeted) transcriptome and full proteome analysis. Results from this comprehensive study revealed two novel pathways to become activated upon monocyte stimulation with Al(OH)3: the first pathway was IFNβ signaling possibly induced by DAMP sensing pathways like TLR or NOD1 activation, and second the HLA class I antigen processing and presentation pathway...
January 6, 2018: Journal of Proteomics
https://www.readbyqxmd.com/read/29316130/efficacy-and-safety-of-fast-acting-insulin-aspart-in-comparison-with-insulin-aspart-in-type-1-diabetes-onset%C3%A2-1-a-52-week-randomized-treat-to-target-phase%C3%A2-3-trial
#15
Chantal Mathieu, Bruce W Bode, Edward Franek, Athena Philis-Tsimikas, Ludger Rose, Tina Graungaard, Anne Birk Østerskov, David Russell-Jones
AIMS: Compare safety and efficacy of fast-acting insulin aspart (faster aspart) with conventional insulin aspart (IAsp) in adults with type 1 diabetes (T1D). MATERIALS AND METHODS: onset 1 was a randomized, multicentre, treat-to-target, phase 3, 52-week (initial 26 weeks + additional 26 weeks) trial conducted at 165 sites across nine countries. Adults with T1D were randomly allocated to double-blind mealtime faster aspart or IAsp, each with once- or twice-daily insulin detemir...
January 8, 2018: Diabetes, Obesity & Metabolism
https://www.readbyqxmd.com/read/29313547/the-p-type-atpase-inhibiting-potential-of-polyoxotungstates
#16
Nadiia Gumerova, Lukáš Krivosudský, Gil Fraqueza, Joscha Breibeck, Emir Al-Sayed, Elias Tanuhadi, Aleksandar Bijelic, Juan Fuentes, Manuel Aureliano, Annette Rompel
Polyoxometalates (POMs) are transition metal complexes that exhibit a broad diversity of structures and properties rendering them promising for biological purposes. POMs are able to inhibit a series of biologically important enzymes, including phosphatases, and thus are able to affect many biochemical processes. In the present study, we analyzed and compared the inhibitory effects of nine different polyoxotungstates (POTs) on two P-type ATPases, Ca2+-ATPase from skeletal muscle and Na+/K+-ATPase from basal membrane of skin epithelia...
January 9, 2018: Metallomics: Integrated Biometal Science
https://www.readbyqxmd.com/read/29311244/coxiella-burnetii-inhibits-neutrophil-apoptosis-by-exploiting-survival-pathways-and-anti-apoptotic-protein-mcl-1
#17
Rama Cherla, Yan Zhang, Lindsey Ledbetter, Guoquan Zhang
Our previous study demonstrated that neutrophils play an important role in host defense against Coxiella burnetii infection in mice. In this study, C. burnetii avirulent Nine Mile phase II (NMII) was used to examine if C. burnetii can modulate mouse bone marrow-derived neutrophil apoptosis. The results indicated that NMII can inhibit neutrophil apoptosis. Western blotting demonstrated that caspase-3 cleavage was decreased, while phosphorylated mitogen-activated protein kinase (MAPK) p38 and extracellular signal-regulated kinase 1 (Erk1) were increased in NMII-infected neutrophils...
January 8, 2018: Infection and Immunity
https://www.readbyqxmd.com/read/29307484/atomic-structure-of-type-vi-contractile-sheath-from-pseudomonas-aeruginosa
#18
Osman Salih, Shaoda He, Sara Planamente, Lasse Stach, James T MacDonald, Eleni Manoli, Sjors H W Scheres, Alain Filloux, Paul S Freemont
Pseudomonas aeruginosa has three type VI secretion systems (T6SSs), H1-, H2-, and H3-T6SS, each belonging to a distinct group. The two T6SS components, TssB/VipA and TssC/VipB, assemble to form tubules that conserve structural/functional homology with tail sheaths of contractile bacteriophages and pyocins. Here, we used cryoelectron microscopy to solve the structure of the H1-T6SS P. aeruginosa TssB1C1 sheath at 3.3 Å resolution. Our structure allowed us to resolve some features of the T6SS sheath that were not resolved in the Vibrio cholerae VipAB and Francisella tularensis IglAB structures...
December 21, 2017: Structure
https://www.readbyqxmd.com/read/29307130/pathotyping-of-diarrhoeagenic-cattle-escherichia-coli-strains-isolated-in-the-province-of-tehran-iran
#19
Hamid Staji, Pietro Badagliacca, Taghi Zahraei Salehi, Federica Lopes, Mariangela Iorio, Alfreda Tonelli, Luc Masson
An oligonucleotide DNA microarray targeting 348 virulence factors and genetic markers was used in the pathotyping, serotyping and phylogrouping of 51 Escherichia coli strains isolated from faecal samples. The samples were collected from diarrhoeic 1 to 30 days old calves located at 14 farms in the Tehran province, Iran. Positive microarray signals for genes encoding the Locus of Enterocyte E acement (LEE), the Type III Secretion System (TTSS), and the absence of EPEC adherence factor (EAF) permitted the pathotyping of 25 strains as atypical Enteropathogenic (aEPEC) or Enterohaemorrhagic Escherichia coli (EHEC)...
December 29, 2017: Veterinaria Italiana
https://www.readbyqxmd.com/read/29305897/cloning-expression-and-purification-of-virb10-protein-of-brucella-melitensis-and-to-evaluate-its-role-as-a-serological-marker-for-brucella-infection-in-experimental-and-natural-hosts
#20
Prachi Pathak, Ashu Kumar, Prabhu Prasad Sarangi, Sameer Bhagyawant, Duraipandian Thavaselvam
Brucellosis is a zoonotic disease caused by various species of the genus Brucella. The control of disease mainly depends on its accurate and early diagnosis. Culture methods employed for diagnosis are time consuming and require well equipped biosafety level 3 laboratories and hence serological tests are favored alternative for brucellosis diagnosis. At present serological diagnosis is based on LPS (lipopolysaccharide) which is less specific as the LPS antigen of Brucella species shows cross reactivity with other gram-negative bacteria...
January 3, 2018: Protein Expression and Purification
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