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https://www.readbyqxmd.com/read/28805824/flexible-shape-memory-scaffold-for-minimally-invasive-delivery-of-functional-tissues
#1
Miles Montgomery, Samad Ahadian, Locke Davenport Huyer, Mauro Lo Rito, Robert A Civitarese, Rachel D Vanderlaan, Jun Wu, Lewis A Reis, Abdul Momen, Saeed Akbari, Aric Pahnke, Ren-Ke Li, Christopher A Caldarone, Milica Radisic
Despite great progress in engineering functional tissues for organ repair, including the heart, an invasive surgical approach is still required for their implantation. Here, we designed an elastic and microfabricated scaffold using a biodegradable polymer (poly(octamethylene maleate (anhydride) citrate)) for functional tissue delivery via injection. The scaffold's shape memory was due to the microfabricated lattice design. Scaffolds and cardiac patches (1 cm × 1 cm) were delivered through an orifice as small as 1 mm, recovering their initial shape following injection without affecting cardiomyocyte viability and function...
August 14, 2017: Nature Materials
https://www.readbyqxmd.com/read/28798534/a-case-of-spontaneous-purulent-granulomatous-pericarditis-in-a-beagle
#2
Kyohei Kamio, Yutaka Nakanishi, Kenta Matsue, Minoru Sasaki
The present report describes a case of spontaneous purulent granulomatous pericarditis in a 16-month-old beagle. A gross necropsy revealed pericardial effusion and multiple nodules on the surface of the heart and around the aorta adjacent to the heart. The cut surface of these nodules was solid and white in color, containing partially yellowish white regions. Microscopically, granulomatous inflammation characterized by central necrotic cellular debris surrounded by neutrophils, macrophages, lymphocytes, plasma cells, fibroblasts and collagen fibers was observed in the epicardium...
July 2017: Journal of Toxicologic Pathology
https://www.readbyqxmd.com/read/28798316/the-proton-sensing-g-protein-coupled-receptor-t-cell-death-associated-gene-8-tdag8-shows-cardioprotective-effects-against-myocardial-infarction
#3
Akiomi Nagasaka, Chihiro Mogi, Hiroki Ono, Toshihide Nishi, Yuma Horii, Yuki Ohba, Koichi Sato, Michio Nakaya, Fumikazu Okajima, Hitoshi Kurose
Myocardial infarction (MI) is an ischaemic heart condition caused by the occlusion of coronary arteries. Following MI, lactic acid from anaerobic glycolysis increases and infiltrating immune cells produce severe inflammation, which leads to acidosis in the ischaemic heart. However, the physiological implication of this pH reduction remains largely unknown. T-cell death-associated gene 8 (TDAG8) is a proton-sensing G protein-coupled receptor found on cardiac macrophages that recognise increases in extracellular protons...
August 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28775077/chronic-rejection-of-cardiac-allografts-is-associated-with-increased-lymphatic-flow-and-cellular-trafficking
#4
Lindsey A Edwards, Anna K Nowocin, Nazila V Jafari, Lucy Meader, Kathryn Brown, Aurélien Sarde, Carolyn Lam, Alex Murray, Wilson Wong
Background -Cardiac transplantation is an excellent treatment for end-stage heart disease. However, rejection of the donor graft, particularly by chronic rejection leading to cardiac allograft vasculopathy, remains a major cause of graft loss. The lymphatic system plays a crucial role in the alloimmune response, facilitating trafficking of antigen presenting cells (APCs) to draining lymph nodes (dLN). The encounter of APCs with T lymphocytes in secondary lymphoid organs is essential for the initiation of alloimmunity...
August 3, 2017: Circulation
https://www.readbyqxmd.com/read/28774883/the-cardiac-microenvironment-uses-non-canonical-wnt-signaling-to-activate-monocytes-after-myocardial-infarction
#5
Ingmar Sören Meyer, Andreas Jungmann, Christoph Dieterich, Min Zhang, Felix Lasitschka, Susann Werkmeister, Jan Haas, Oliver J Müller, Michael Boutros, Matthias Nahrendorf, Hugo A Katus, Stefan E Hardt, Florian Leuschner
A disturbed inflammatory response following myocardial infarction (MI) is associated with poor prognosis and increased tissue damage. Monocytes are key players in healing after MI, but little is known about the role of the cardiac niche in monocyte activation. This study investigated microenvironment-dependent changes in inflammatory monocytes after MI RNA sequencing analysis of murine Ly6C(high) monocytes on day 3 after MI revealed differential regulation depending on location. Notably, the local environment strongly impacted components of the WNT signaling cascade...
August 3, 2017: EMBO Molecular Medicine
https://www.readbyqxmd.com/read/28771943/overexpression-of-integrin-%C3%AE-11-induces-cardiac-fibrosis-in-mice
#6
Andreas Romaine, Ida W Sørensen, Cédric Zeltz, Ning Lu, Pugazendhi Murugan Erusappan, Arne Olav Melleby, Lili Zhang, Bård Bendiksen, Emma Louise Robinson, Jan Magnus Aronsen, Kate M Herum, Håvard Danielsen, Ivar Sjaastad, Geir Christensen, Donald Gullberg
AIM: To understand the role of the collagen-binding integrin α11 in vivo we have used a classical approach of creating a mouse strain overexpressing integrin α11. A transgenic mouse strain overexpressing α11 in muscle tissues was analysed in the current study with special reference to the heart tissue. METHODS: We generated and phenotyped integrin α11 transgenic (TG) mice by echocardiography, magnetic resonance imaging and histology. Wild-type (WT) mice were subjected to aortic banding (AB) and the expression of integrin α11 was measured in flow cytometry sorted cardiomyocytes and non-myocytes...
August 3, 2017: Acta Physiologica
https://www.readbyqxmd.com/read/28768721/the-glucocorticoid-receptor-in-monocyte-derived-macrophages-is-critical-for-cardiac-infarct-repair-and-remodeling
#7
Paolo Galuppo, Sabine Vettorazzi, Julian Hövelmann, Claus-Jürgen Scholz, Jan Peter Tuckermann, Johann Bauersachs, Daniela Fraccarollo
Cell- and tissue-specific actions of glucocorticoids are mediated by the glucocorticoid receptor. Here, we demonstrate that the glucocorticoid receptor (GR) in macrophages is essential for cardiac healing after myocardial infarction. Compared with GR(flox) (wild-type controls), GR(LysMCre) mice that lacked GR in myeloid cells showed increased acute mortality as a result of cardiac rupture. Seven days after left coronary artery ligation, GR(LysMCre) mice exhibited worse cardiac function and adverse remodeling associated with impaired scar formation and angiogenic response to ischemic injury...
August 2, 2017: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/28766520/-the-peculiarities-of-the-relationship-between-the-effector-cells-of-the-local-immune-system-in-the-broncho-vascular-barrier-of-the-breast-fed-infants-presenting-with-certain-acute-respiratory-viral-infections
#8
O D Yagmurov, S N Litus
The acute respiratory viral infections (ARVI) are ranked among the most widespread diseases affecting the children in the early infancy. They account for 60 to 85.4% of all infections recorded in the young children. AIM: The objective of the present study was to elucidate the peculiar features of the accumulation of the effector cells of the local immunity system and intercellular interplay in the broncho-vascular barrier of the breast-fed infants presenting with various ARVIs. MATERIAL AND METHODS: We undertook the analysis of 32 cases of infections caused by influenza A and B viruses and of the adenovirus infection verified by the immunofluorescence assay...
2017: Sudebno-meditsinskaia Ekspertiza
https://www.readbyqxmd.com/read/28764744/a-case-study-of-desmozoon-lepeophtherii-infection-in-farmed-atlantic-salmon-associated-with-gill-disease-peritonitis-intestinal-infection-stunted-growth-and-increased-mortality
#9
Simon Chioma Weli, Ole Bendik Dale, Haakon Hansen, Mona Cecilie Gjessing, Liv Birte Rønneberg, Knut Falk
BACKGROUND: In September 2008, a disease outbreak characterized by acute, severe gill pathology and peritonitis, involving the gastrointestinal tract, was observed in an Atlantic salmon (Salmo salar L.) farm in north-western Norway. During subsequent sampling in November 2008 and January 2009, chronic proliferative gill inflammation and peritonitis was observed. Cumulative mortalities of 5.6-12.8% and severe growth retardation were observed. Routine diagnostic analysis revealed no diseases known to salmon at the time, but microsporidian infection of tissues was observed...
August 2, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28761077/il-4-as-a-repurposed-biological-drug-for-myocardial-infarction-through-augmentation-of-reparative-cardiac-macrophages-proof-of-concept-data-in-mice
#10
Yusuke Shintani, Tomoya Ito, Laura Fields, Manabu Shiraishi, Yuki Ichihara, Nobuhiko Sato, Mihai Podaru, Satoshi Kainuma, Hiroyuki Tanaka, Ken Suzuki
Recent research has shown that reparative (alternatively activated or M2) macrophages play a role in repair of damaged tissues, including the infarcted hearts. Administration of IL-4 is known to augment M2 macrophages. This translational study thus aimed to investigate whether IL-4 administration is useful for the treatment of myocardial infarction. Long-acting IL-4 complex (IL-4c; recombinant IL-4 mixed with anti-IL-4 monoclonal antibody as a stabilizer) was administered after coronary artery ligation in mice...
July 31, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28759310/ultrastructure-and-pathology-of-prion-protein-amyloid-accumulation-and-cellular-damage-in-extraneural-tissues-of-scrapie-infected-transgenic-mice-expressing-anchorless-prion-protein
#11
Brent Race, Martin Jeffrey, Gillian McGovern, David Dorward, Bruce Chesebro
In most human and animal prion diseases the abnormal disease-associated prion protein (PrPSc) is deposited as non-amyloid aggregates in CNS, spleen and lymphoid organs. In contrast, in humans and transgenic mice with PrP mutations which cause expression of PrP lacking a glycosylphosphatidylinositol (GPI)-anchor, most PrPSc is in the amyloid form. In transgenic mice expressing only anchorless PrP (tg anchorless), PrPSc is deposited not only in CNS and lymphoid tissues, but also in extraneural tissues including heart, brown fat, white fat, and colon...
July 4, 2017: Prion
https://www.readbyqxmd.com/read/28757538/the-roles-of-hypoxia-signaling-in-the-pathogenesis-of-cardiovascular-diseases
#12
Hajime Abe, Hiroaki Semba, Norihiko Takeda
The circulatory system distributes blood flow to each tissue and transports oxygen and nutrients. Peripheral circulation is required to maintain the physiological function in each tissue. Disturbance of circulation, therefore, decreases oxygen delivery, leading to tissue hypoxia which takes place in several cardiovascular disorders including atherosclerosis, pulmonary arterial hypertension and heart failure. While tissue hypoxia can be induced because of cardiovascular disorders, hypoxia signaling itself has a potential to modulate tissue remodeling processes or the severity of the cardiovascular disorders...
July 28, 2017: Journal of Atherosclerosis and Thrombosis
https://www.readbyqxmd.com/read/28744126/gold-nanoparticle-based-mir155-antagonist-macrophage-delivery-restores-the-cardiac-function-in-ovariectomized-diabetic-mouse-model
#13
Chengming Jia, Hui Chen, Mengying Wei, Xiangjie Chen, Yajun Zhang, Liang Cao, Ping Yuan, Fangyuan Wang, Guodong Yang, Jing Ma
Diabetic cardiomyopathy is a common disease in postmenopausal women, in whom the estrogen deficiency aggravates the pathology. In this study, we have found that estrogen deficiency due to ovariectomy aggravates the inflammation in the hearts of diabetic mice, as depicted by excessive proinflammatory type 1 macrophages (M1) over anti-inflammatory type 2 macrophages (M2). Accordingly, an additional increase of reactive oxygen species, cell apoptosis, cardiac hypertrophy, and fibrosis was observed in the hearts of ovariectomized diabetic mice, in comparison with the diabetes-only group...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/28734077/integrative-studies-implicate-matrix-metalloproteinase-12-as-a-culprit-gene-for-large-artery-atherosclerotic-stroke
#14
Hovsep Mahdessian, Ljubica Perisic Matic, Mariette Lengquist, Karl Gertow, Bengt Sennblad, Damiano Baldassarre, Fabrizio Veglia, Steve E Humphries, Rainer Rauramaa, Ulf de Faire, Andries J Smit, Philippe Giral, Sudhir Kurl, Elmo Mannarino, Elena Tremoli, Anders Hamsten, Per Eriksson, Ulf Hedin, Anders Mälarstig
BACKGROUND: Ischemic stroke and coronary heart disease are important contributors to the global disease burden and share atherosclerosis as the main underlying cause. Recent evidence from a genome-wide association study (GWAS) suggested that single nucleotide polymorphisms (SNP) near the MMP12 gene at chromosome 11q22.3 were associated with large-vessel ischemic stroke. Here we evaluated and extended these results by examining the relationship between MMP12 and atherosclerosis in clinical and experimental studies...
July 22, 2017: Journal of Internal Medicine
https://www.readbyqxmd.com/read/28724795/alx-receptor-ligands-define-a-biochemical-endotype-for-severe-asthma
#15
Isabell Ricklefs, Ioanna Barkas, Melody G Duvall, Manuela Cernadas, Nicole L Grossman, Elliot Israel, Eugene R Bleecker, Mario Castro, Serpil C Erzurum, John V Fahy, Benjamin M Gaston, Loren C Denlinger, David T Mauger, Sally E Wenzel, Suzy A Comhair, Andrea M Coverstone, Merritt L Fajt, Annette T Hastie, Mats W Johansson, Michael C Peters, Brenda R Phillips, Bruce D Levy
BACKGROUND: In health, inflammation resolution is an active process governed by specialized proresolving mediators and receptors. ALX/FPR2 receptors (ALX) are targeted by both proresolving and proinflammatory ligands for opposing signaling events, suggesting pivotal roles for ALX in the fate of inflammatory responses. Here, we determined if ALX expression and ligands were linked to severe asthma (SA). METHODS: ALX expression and levels of proresolving ligands (lipoxin A4 [LXA4], 15-epi-LXA4, and annexin A1 [ANXA1]), and a proinflammatory ligand (serum amyloid A [SAA]) were measured in bronchoscopy samples collected in Severe Asthma Research Program-3 (SA [n = 69], non-SA [NSA, n = 51] or healthy donors [HDs, n = 47])...
July 20, 2017: JCI Insight
https://www.readbyqxmd.com/read/28721450/smad3-and-bmal1-regulate-p21-and-s100a4-expression-in-myocardial-stromal-fibroblasts-via-tnf-%C3%AE
#16
Fuyuki Sato, Akira Kohsaka, Kana Takahashi, Saki Otao, Yusuke Kitada, Yoshiyuki Iwasaki, Yasuteru Muragaki
Bmal1, a clock gene, is associated with depression, hypertrophy, metabolic syndrome and diabetes. Smad3, which is involved in the TGF-β signaling pathway, plays an important role in the regulation of tumor progression, fibrosis, obesity and diabetes. Our previous report showed that Smad3 has circadian expression in mouse livers. In the current study, we focused on the heart, especially on the myocardial stromal fibroblasts because the roles of Bmal1 and Smad3 in this tissue are poorly understood. Bmal1 and Smad3 have circadian expression in mouse hearts, and their circadian expression patterns were similar...
July 18, 2017: Histochemistry and Cell Biology
https://www.readbyqxmd.com/read/28716663/time-course-of-plasma-inflammatory-mediators-in-a-rat-model-of-brain-death
#17
Majid Esmaeilzadeh, Mahmoud Sadeghi, Roland Galmbacher, Volker Daniel, Jürgen Knapp, Hans E Heissler, Joachim K Krauss, Arianeb Mehrabi
BACKGROUND: Brain death (BD) is a donor-associated risk factor that negatively affects transplantation outcome. The inflammation associated with BD appears to have a negative effect on organ quality. Complement activation, apoptosis, and pro-inflammatory cytokine and chemokine expression are significantly increased after BD. To better understand this process, we investigated plasma chemokine and cytokine levels for 8h after BD in a rodent model. METHODS: Thirteen healthy adult male Sprague Dawley rats were intubated and mechanically ventilated...
July 15, 2017: Transplant Immunology
https://www.readbyqxmd.com/read/28705316/cell-specific-pathways-supporting-persistent-fibrosis-in-heart-failure
#18
Stephen D Farris, Creighton Don, Deri Helterline, Christopher Costa, Tabitha Plummer, Susanne Steffes, Claudius Mahr, Nahush A Mokadam, April Stempien-Otero
BACKGROUND: Only limited data exist describing the histologic and noncardiomyocyte function of human myocardium in end-stage heart failure (HF). OBJECTIVES: The authors sought to determine changes in noncardiomyocyte cellular activity in patients with end-stage HF after left ventricular assist device (LVAD)-induced remodeling to identify mechanisms impeding recovery. METHODS: Myocardium was obtained from subjects undergoing LVAD placement and/or heart transplantation...
July 18, 2017: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/28704660/pathway-analysis-of-systemic-transcriptome-responses-to-injected-polystyrene-particles-in-zebrafish-larvae
#19
Wouter J Veneman, Herman P Spaink, Nadja R Brun, Thijs Bosker, Martina G Vijver
Microplastics are a contaminant of emergent concern in the environment, however, to date there is a limited understanding on their movement within organisms and the response of organisms. In the current study zebrafish embryos at different development stages were exposed to 700nm fluorescent polystyrene (PS) particles and the response pathway after exposure was investigated using imaging and transcriptomics. Our results show limited spreading of particles within the larvae after injection during the blastula stage...
September 2017: Aquatic Toxicology
https://www.readbyqxmd.com/read/28703031/lower-circulating-migration-inhibitory-factor-protein-is-associated-with-metabolic-syndrome-and-diabetes
#20
Altan Onat, Evin Ademoğlu, Günay Can, Neslihan Çoban, Ayşem Kaya, Hüsniye Yüksel
AIM: The controversial relationship between macrophage migration inhibitory factor (MIF) and the likelihood of cardiometabolic diseases was investigated. Results/methodology: Assayed MIF protein from 1225 adults was cross-sectionally analyzed. MIF was independently inversely associated with age, total testosterone and positively with high-density lipoprotein-cholesterol. In men MIF correlation with age, testosterone and waist circumference converted from inverse in the upper to positive in the bottom MIF third...
July 2017: Biomarkers in Medicine
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