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Fibronectin assembly

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https://www.readbyqxmd.com/read/28887577/periostin-and-its-interacting-proteins-in-the-construction-of-extracellular-architectures
#1
REVIEW
Isao Kii, Harumi Ito
Periostin is a matricellular protein that is composed of a multi-domain structure with an amino-terminal EMI domain, a tandem repeat of four FAS 1 domains, and a carboxyl-terminal domain. These distinct domains have been demonstrated to bind to many proteins including extracellular matrix proteins (Collagen type I and V, fibronectin, tenascin, and laminin), matricellular proteins (CCN3 and βig-h3), and enzymes that catalyze covalent crosslinking between extracellular matrix proteins (lysyl oxidase and BMP-1)...
September 8, 2017: Cellular and Molecular Life Sciences: CMLS
https://www.readbyqxmd.com/read/28867487/arp2-3-complex-is-required-for-macrophage-integrin-functions-but-is-dispensable-for-fcr-phagocytosis-and-in%C3%A2-vivo-motility
#2
Jeremy D Rotty, Hailey E Brighton, Stephanie L Craig, Sreeja B Asokan, Ning Cheng, Jenny P Ting, James E Bear
The Arp2/3 complex nucleates branched actin, forming networks involved in lamellipodial protrusion, phagocytosis, and cell adhesion. We derived primary bone marrow macrophages lacking Arp2/3 complex (Arpc2(-/-)) and directly tested its role in macrophage functions. Despite protrusion and actin assembly defects, Arpc2(-/-) macrophages competently phagocytose via FcR and chemotax toward CSF and CX3CL1. However, CR3 phagocytosis and fibronectin haptotaxis, both integrin-dependent processes, are disrupted. Integrin-responsive actin assembly and αM/β2 integrin localization are compromised in Arpc2(-/-) cells...
September 11, 2017: Developmental Cell
https://www.readbyqxmd.com/read/28860021/disruption-of-fibronectin-matrix-affects-type-iv-collagen-fibrillin-and-laminin-deposition-into-extracellular-matrix-of-human-trabecular-meshwork-htm-cells
#3
Mark S Filla, Kaylee D Dimeo, Tiegang Tong, Donna M Peters
Fibronectin fibrils are a major component of the extracellular matrix (ECM) of the trabecular meshwork (TM). They are a key mediator of the formation of the ECM which controls aqueous humor outflow and contributes to the pathogenesis of glaucoma. The purpose of this work was to determine if a fibronectin-binding peptide called FUD, derived from the Streptococcus pyogenes Functional Upstream Domain of the F1 adhesin protein, could be used to control fibronectin fibrillogenesis and hence ECM formation under conditions where its expression was induced by treatment with the glucocorticoid dexamethasone...
August 30, 2017: Experimental Eye Research
https://www.readbyqxmd.com/read/28844950/mir-4516-a-microrna-downregulated-in-psoriasis-inhibits-keratinocyte-motility-by-targeting-fibronectin-integrin-%C3%AE-9-signaling
#4
Shruti Chowdhari, Kabir Sardana, Neeru Saini
Psoriasis is recognized as a T cell mediated inflammatory hyperproliferative skin disorder. Several microRNAs (miRNAs) have been implicated in the pathogenesis of psoriasis however, understanding of their mechanistic involvement remains unclear. Previously, we have shown that PUVA induced miR-4516 downregulates signal transducer and activator of transcription 3 (STAT3) by direct binding to its 3' untranslated region (3'UTR) and suppresses STAT3 downstream genes (Bcl xl, Cyclin D1). Here, we demonstrate for the first time that expression of miR-4516 is significantly downregulated in psoriatic skin...
August 24, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28771968/metabolic-potential-and-in-situ-activity-of-marine-marinimicrobia-bacteria-in-an-anoxic-water-column
#5
Anthony D Bertagnolli, Cory C Padilla, Jennifer B Glass, Bo Thamdrup, Frank J Stewart
Marinimicrobia bacteria are widespread in sub-euphotic areas of the oceans and particularly abundant in oxygen minimum zones (OMZs). Information on Marinimicrobia metabolism is sparse, making the biogeochemical influence of this group challenging to predict. Here, metagenome-assembled genomes representing Marinimicrobia subgroups PN262000N21 and ARCTIC96B-7 were retrieved to near completion (97% and 94%) from OMZ metagenomes, with contamination (14.1%) observed only in ARCTIC96B-7. Genes for aerobic carbon monoxide (CO) oxidation, polysulfide metabolism, and hydrogen utilization were identified only in PN262000N21, while genes for partial denitrification occurred in both genomes...
August 3, 2017: Environmental Microbiology
https://www.readbyqxmd.com/read/28745050/fibronectin-conformation-and-assembly-analysis-of-fibronectin-deletion-mutants-and-fibronectin-glomerulopathy-gfnd-mutants
#6
Tomoo Ohashi, Christopher A Lemmon, Harold P Erickson
To study fibronectin (FN) conformation and assembly, we generated several deletion mutants: FNΔ(I)1-5, FNΔ(III)1-3, FNΔ(III)4-8, and FNΔ(III)11-14. A monomeric form, FNmono, which lacked the C-terminal dimerization region, was also created. FNtnA-D was generated by swapping FNIII domains 1-8 in FNΔ(III)11-14 with seven FNIII domains from tenascin-C. The conformations of these mutants were analyzed by glycerol gradient sedimentation under low-salt (20 mM NaCl) and high-salt (200 mM NaCl) conditions. Surprisingly, most of the mutants showed a compact conformation under low-salt conditions, except for FNtnA-D...
August 29, 2017: Biochemistry
https://www.readbyqxmd.com/read/28726917/engineering-micromyocardium-to-delineate-cellular-and-extracellular-regulation-of-myocardial-tissue-contractility
#7
Nethika R Ariyasinghe, Caitlin H Reck, Alyssa A Viscio, Andrew P Petersen, Davi M Lyra-Leite, Nathan Cho, Megan L McCain
Cardiovascular diseases are a leading cause of death, in part due to limitations of existing models of the myocardium. Myocardium consists of aligned, contractile cardiac myocytes interspersed with fibroblasts that synthesize extracellular matrix (ECM). The cellular demographics and biochemical and mechanical properties of the ECM remodel in many different cardiac diseases. However, the impact of diverse cellular and extracellular remodeling on the contractile output of the myocardium are poorly understood...
September 18, 2017: Integrative Biology: Quantitative Biosciences From Nano to Macro
https://www.readbyqxmd.com/read/28722504/role-of-tenascin-c-in-articular-cartilage
#8
Masahiro Hasegawa, Toshimichi Yoshida, Akihiro Sudo
Tenascin-C (TN-C) is a glycoprotein component of the extracellular matrix (ECM). TN-C consists of four distinct domains, including the tenascin assembly domain, epidermal growth factor-like repeats, fibronectin type III-like repeats, and the fibrinogen-like globe (FBG) domain. This review summarizes the role of TN-C in articular cartilage. Expression of TN-C is associated with the development of articular cartilage but markedly decreases during maturation of chondrocytes and disappears almost completely in adult articular cartilage...
July 19, 2017: Modern Rheumatology
https://www.readbyqxmd.com/read/28713337/the-s-layer-associated-serine-protease-homolog-prtx-impacts-cell-surface-mediated-microbe-host-interactions-of-lactobacillus-acidophilus-ncfm
#9
Brant R Johnson, Sarah O'Flaherty, Yong Jun Goh, Ian Carroll, Rodolphe Barrangou, Todd R Klaenhammer
Health-promoting aspects attributed to probiotic microorganisms, including adhesion to intestinal epithelia and modulation of the host mucosal immune system, are mediated by proteins found on the bacterial cell surface. Notably, certain probiotic and commensal bacteria contain a surface (S-) layer as the outermost stratum of the cell wall. S-layers are non-covalently bound semi-porous, crystalline arrays of self-assembling, proteinaceous subunits called S-layer proteins (SLPs). Recent evidence has shown that multiple proteins are non-covalently co-localized within the S-layer, designated S-layer associated proteins (SLAPs)...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28675230/one-pot-synthesis-of-nanochain-particles-for-targeting-brain-tumors
#10
V S Perera, G Covarrubias, M Lorkowski, P Atukorale, A Rao, S Raghunathan, R Gopalakrishnan, B O Erokwu, Y Liu, D Dixit, S M Brady-Kalnay, D Wilson, C Flask, J Rich, P M Peiris, E Karathanasis
To synthesize multi-component nanochains, we developed a simple 'one-pot' synthesis, which exhibited high yield and consistency. The nanochains particles consist of parent nanospheres chemically linked into a higher-order, chain-like assembly. The one-pot synthesis is based on the addition of two types of parent nanospheres in terms of their surface chemical functionality (e.g., decorated with PEG-NH2 or PEG-COOH). By reacting the two types of parent nanospheres at a specific ratio (∼2 : 1) for a short period of time (∼30 min) under rigorous stirring, nanochains were formed...
July 13, 2017: Nanoscale
https://www.readbyqxmd.com/read/28623309/fibronectin-promotes-directional-persistence-in-fibroblast-migration-through-interactions-with-both-its-cell-binding-and-heparin-binding-domains
#11
Dimitris Missirlis, Tamás Haraszti, Horst Kessler, Joachim P Spatz
The precise mechanisms through which insoluble, cell-adhesive ligands induce and regulate directional cell migration remain obscure. We recently demonstrated that elevated surface density of physically adsorbed plasma fibronectin (FN) promotes high directional persistence in fibroblast migration. While cell-FN association through integrins α5β1 and αvβ3 was necessary, substrates that selectively engaged these integrins did not support the phenotype. We here show that high directional persistence necessitates a combination of the cell-binding and C-terminal heparin-binding domains of FN, but does not require the engagement of syndecan-4 or integrin α4β1...
June 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28612067/stretch-dependent-changes-in-molecular-conformation-in-fibronectin-nanofibers
#12
John M Szymanski, Emily N Sevcik, Kairui Zhang, Adam W Feinberg
Fibronectin (FN) is an extracellular matrix (ECM) glycoprotein that plays an important role in a wide range of biological processes including embryonic development, wound healing, and fibrosis. Recent evidence has demonstrated that FN is mechanosensitive, where the application of force induces conformational changes within the FN molecule to expose otherwise cryptic binding domains. However, it has proven technically challenging to dynamically monitor how the nanostructure of FN fibers changes as a result of force-induced extension, due in part to the inherent complexity of FN networks within tissue and cell-generated extracellular matrix (ECM)...
July 25, 2017: Biomaterials Science
https://www.readbyqxmd.com/read/28576007/a-dual-layer-macro-mesoporous-structured-tio2-surface-improves-the-initial-adhesion-of-osteoblast-like-cells
#13
Ranran Zhang, Tarek A Elkhooly, Qianli Huang, Xujie Liu, Xing Yang, Hao Yan, Zhiyuan Xiong, Jing Ma, Qingling Feng, Zhijian Shen
A dual-layer TiO2 surface with hierarchical macro and mesoporous structure was prepared by a combinational approach of micro-arc oxidation followed by evaporation-induced self-assembly of nano-crystallites. The mesoporous layer contains pores with an average size of <10nm and consists of anatase TiO2 nanocrystallites. The dual-layer hierarchical macro/mesoporous structured TiO2 surface improves the hydrophilicity and fibronectin adsorption ability in comparison with the sole macroporous or smooth TiO2 surface...
September 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28544963/fibronectin-based-multilayer-thin-films
#14
Adeline Gand, Maud Tabuteau, Coline Chat, Guy Ladam, Hassan Atmani, Paul R Van Tassel, Emmanuel Pauthe
Thin films mimicking the structure and composition of the extra-cellular matrix (ECM) are potentially attractive as biomaterials for cell contacting applications. Layer-by-layer (LbL) assembly of a biological polycation, poly(l-lysine) (PLL), and a common ECM protein, fibronectin (Fn), was employed here to construct nanoscale, ECM mimicking films. Incremental film thickness and interfacial charge magnitude are observed to diminish with layer number, resulting in sub-linear film growth scaling and saturation after about 10 layers...
May 10, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28517972/glycated-collagen-stimulates-the-differentiation-of-gingival-myofibroblasts
#15
Ignacio N Retamal, Romina Hernández, Francisco Melo, Paulina Zapata, Constanza Martínez, Jorge Martínez, Patricio C Smith
BACKGROUND: Glucose-derived metabolites may alter the structure and biological properties of important proteins in the periodontium such as collagens. As a consequence, it is possible that collagen-binding cells may change their phenotypic traits. Though the glucose derived product methylglyoxal has been detected in periodontal lesions, the precise effect of collagen glycation on gingival connective tissue biology is far from being understood. In the present study we have evaluated whether collagen glycation by methylglyoxal may affect the phenotypic properties and remodeling capacity of human gingival fibroblasts...
May 18, 2017: Journal of Periodontology
https://www.readbyqxmd.com/read/28494966/mechanotransduction-dynamics-at-the-cell-matrix-interface
#16
Seth H Weinberg, Devin B Mair, Christopher A Lemmon
The ability of cells to sense and respond to mechanical cues from the surrounding environment has been implicated as a key regulator of cell differentiation, migration, and proliferation. The extracellular matrix (ECM) is an oft-overlooked component of the interface between cells and their surroundings. Cells assemble soluble ECM proteins into insoluble fibrils with unique mechanical properties that can alter the mechanical cues a cell receives. In this study, we construct a model that predicts the dynamics of cellular traction force generation and subsequent assembly of fibrils of the ECM protein fibronectin (FN)...
May 9, 2017: Biophysical Journal
https://www.readbyqxmd.com/read/28486777/double-hydrophobic-elastin-like-polypeptides-with-added-functional-motifs-self-assembly-and-cytocompatibility
#17
Duc H T Le, Yoko Tsutsui, Ayae Sugawara-Narutaki, Hiroshi Yukawa, Yoshinobu Baba, Chikara Ohtsuki
We have recently developed a novel double-hydrophobic elastin-like triblock polypeptide called GPG, designed after the uneven distribution of two different hydrophobic domains found in elastin, an extracellular matrix protein providing elasticity and resilience to tissues. Upon temperature trigger, GPG undergoes a sequential self-assembling process to form flexible beaded nanofibers with high homogeneity and excellent dispersibility in water. Given that GPG might be a potential elastin-mimetic material, we sought to explore the biological activities of this block polypeptide...
May 9, 2017: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/28456951/s1p-synergizes-with-wall-shear-stress-and-other-angiogenic-factors-to-induce-endothelial-cell-sprouting-responses
#18
Camille L Duran, Roland Kaunas, Kayla J Bayless
Angiogenesis is the process of new blood vessel growth from pre-existing structures. During sprout initiation, endothelial cells (ECs) are activated by pro-angiogenic factors to degrade the basement membrane, migrate into the surrounding matrix, and form structures that anastomose to connect neighboring vessels. Sphingosine 1-phosphate (S1P) is a biologically active lysosphingolipid that is secreted by platelets and promotes angiogenesis under normal and pathological conditions by acting on ECs. In addition to biochemical factors, the endothelium is continuously subjected to mechanical forces in the form of wall shear stress (WSS) from fluid forces...
April 30, 2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28407433/spatiotemporal-evolution-of-the-wound-repairing-process-in-a-3d-human-dermis-equivalent
#19
Bernadette Lombardi, Costantino Casale, Giorgia Imparato, Francesco Urciuolo, Paolo Antonio Netti
Several skin equivalent models have been developed to investigate in vitro the re-epithelialization process occurring during wound healing. Although these models recapitulate closure dynamics of epithelial cells, they fail to capture how a wounded connective tissue rebuilds its 3D architecture until the evolution in a scar. Here, the in vitro tissue repair dynamics of a connective tissue is replicated by using a 3D human dermis equivalent (3D-HDE) model composed of fibroblasts embedded in their own extracellular matrix (ECM)...
April 13, 2017: Advanced Healthcare Materials
https://www.readbyqxmd.com/read/28393762/engineering-a-functional-three-dimensional-human-cardiac-tissue-model-for-drug-toxicity-screening
#20
Hong Fang Lu, Meng Fatt Leong, Tze Chiun Lim, Ying Ping Chua, Jia Kai Lim, Chan Du, Andrew C A Wan
Cardiotoxicity is one of the major reasons for clinical drug attrition. In vitro tissue models that can provide efficient and accurate drug toxicity screening are highly desired for preclinical drug development and personalized therapy. Here, we report the fabrication and characterization of a human cardiac tissue model for high throughput drug toxicity studies. Cardiac tissues were fabricated via cellular self-assembly of human transgene-free induced pluripotent stem cells-derived cardiomyocytes in pre-fabricated polydimethylsiloxane molds...
May 11, 2017: Biofabrication
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