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Matrix Biology: Journal of the International Society for Matrix Biology

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https://www.readbyqxmd.com/read/28062282/coupling-of-vinculin-to-f-actin-demands-syndecan-4-proteoglycan
#1
R P Cavalheiro, M A Lima, T R Jarrouge-Bouças, G M Viana, C C Lopes, V J Coulson-Thomas, J L Dreyfuss, E A Yates, I L S Tersariol, H B Nader
Syndecans are heparan sulfate proteoglycans characterized as transmembrane receptors that act cooperatively with the cell surface and extracellular matrix proteins. Syn4 knockdown was performed in order to address its role in endothelial cells (EC) behavior. Normal EC and shRNA-Syn4-EC cells were studied comparatively using complementary confocal, super-resolution and non-linear microscopic techniques. Confocal and super-resolution microscopy revealed that Syn4 knockdown alters the level and arrangement of essential proteins for focal adhesion, evidenced by the decoupling of vinculin from F-actin filaments...
January 3, 2017: Matrix Biology: Journal of the International Society for Matrix Biology
https://www.readbyqxmd.com/read/28043890/integrin-alpha6-maintains-the-structural-integrity-of-the-kidney-collecting-system
#2
Olga M Viquez, Eugenia M Yazlovitskaya, Tianxing Tu, Glenda Mernaugh, Pablo Secades, Karen K McKee, Vito Quaranta, Peter Yurchenco, Leslie C Gewin, Arnoud Sonnenberg, Ambra Pozzi, Roy Zent
Laminins are a major constituent of the basement membranes of the kidney collecting system. Integrins, transmembrane receptors formed by non-covalently bound α and β subunits, serve as laminin receptors, but their role in development and homeostasis of the kidney collecting system are poorly defined. Integrin α3β1, one of the major laminin receptors, plays a minor role in kidney collecting system development, while the role of α6 containing integrins (α6β1 and α6β4), the other major laminin receptors, is unknown...
December 30, 2016: Matrix Biology: Journal of the International Society for Matrix Biology
https://www.readbyqxmd.com/read/28043889/emt-induced-by-egf-and-wounding-activates-hyaluronan-synthesis-machinery-and-ev-shedding-in-rat-primary-mesothelial-cells
#3
Ville Koistinen, Kai Härkönen, Riikka Kärnä, Uma Thanigai Arasu, Sanna Oikari, Kirsi Rilla
The mesothelium is a membrane that forms the lining of several body cavities. It is composed of simple squamous mesothelial cells that secrete a glycosaminoglycan-rich lubricating fluid between inner organs. One of the most abundant glycosaminoglycans of those fluids is hyaluronan, which is synthesized on a plasma membrane and especially on apical filopodia of cultured cells. Our recent study showed that similar hyaluronan-rich protrusions are found in mesothelial lining in vivo, which suggests that hyaluronan synthesis in plasma membrane protrusions is a general process...
December 30, 2016: Matrix Biology: Journal of the International Society for Matrix Biology
https://www.readbyqxmd.com/read/28040522/the-nature-and-biology-of-basement-membranes
#4
REVIEW
Ambra Pozzi, Peter D Yurchenco, Renato V Iozzo
Basement membranes are delicate, nanoscale and pliable sheets of extracellular matrices that often act as linings or partitions in organisms. Previously considered as passive scaffolds segregating polarized cells, such as epithelial or endothelial cells, from the underlying mesenchyme, basement membranes have now reached the center stage of biology. They play a multitude of roles from blood filtration to muscle homeostasis, from storing growth factors and cytokines to controlling angiogenesis and tumor growth, from maintaining skin integrity and neuromuscular structure to affecting adipogenesis and fibrosis...
December 28, 2016: Matrix Biology: Journal of the International Society for Matrix Biology
https://www.readbyqxmd.com/read/28025167/force-dependent-breaching-of-the-basement-membrane
#5
REVIEW
Tammy T Chang, Dhruv Thakar, Valerie M Weaver
Clinically, non-invasive carcinomas are confined to the epithelial side of the basement membrane and are classified as benign, whereas invasive cancers invade through the basement membrane and thereby acquire the potential to metastasize. Recent findings suggest that, in addition to protease-mediated degradation and chemotaxis-stimulated migration, basement membrane invasion by malignant cells is significantly influenced by the stiffness of the associated interstitial extracellular matrix and the contractility of the tumor cells that is dictated in part by their oncogenic genotype...
December 23, 2016: Matrix Biology: Journal of the International Society for Matrix Biology
https://www.readbyqxmd.com/read/28011198/cell-autonomous-antxr1-mediated-regulation-of-extracellular-matrix-components-in-primary-fibroblasts
#6
Kai Hu, Bjorn R Olsen, Tatiana Y Besschetnova
Our previous studies of Antxr1 knockout mice suggested that fibrotic skin abnormalities in these mice are associated with increased VEGF signaling. Here, based on studies of primary fibroblasts isolated from skin of Antx1+/+ and Antxr1-/- mice at embryonic stage E17.5 and postnatal day P49, we conclude that increased Col1a1 and Fn1 expression in Antxr1-deficient fibroblasts is partly mediated by a cell-autonomous ANTXR1-dependent mechanism. In turn, this may act in parallel with VEGF-dependent regulation of collagen type I and fibronectin production...
December 20, 2016: Matrix Biology: Journal of the International Society for Matrix Biology
https://www.readbyqxmd.com/read/28007568/hyaluronic-acid-decreases-the-mechanical-stability-but-increases-the-lytic-resistance-of-fibrin-matrices
#7
Erzsébet Komorowicz, Nóra Balázs, Zoltán Varga, László Szabó, Attila Bóta, Krasimir Kolev
Hyaluronic acid (HA) is a large, non-sulfated glucosaminoglycan abundantly present at sites where fibrin is also formed (during wound healing, in arterial restenotic lesions and eroded atherosclerotic plaques). The aim of the present study was to characterize the structure of composite fibrin-HA clots with scanning electron microscopy (SEM), pressure-driven permeation and small-angle X-ray scattering (SAXS) and their viscoelastic properties with an oscillation rheometer. In addition the efficiency of fibrinolysis in these clots was investigated by kinetic turbidimetric and chromogenic assays for dissolution of fibrin and plasminogen activation by tissue-type plasminogen activator (tPA)...
December 19, 2016: Matrix Biology: Journal of the International Society for Matrix Biology
https://www.readbyqxmd.com/read/27988350/quantitative-proteomics-analysis-of-cartilage-response-to-mechanical-injury-and-cytokine-treatment
#8
Yang Wang, Yang Li, Areej Khabut, Susan Chubinskaya, Alan J Grodzinsky, Patrik Önnerfjord
Mechanical damage at the time of joint injury and the ensuing inflammatory response associated with elevated levels of pro-inflammatory cytokines in the synovial fluid, are reported to contribute to the progression to osteoarthritis after injury. In this exploratory study, we used a targeted proteomics approach to follow the progression of matrix degradation in response to mechanical damage and cytokine treatment of human knee cartilage explants, and thereby to study potential molecular biomarkers. This proteomics approach allowed us to unambiguously identify and quantify multiple peptides and proteins in the cartilage medium and explants upon treatment with ±injurious compression ±cytokines, treatments that mimic the earliest events in post-traumatic OA...
December 15, 2016: Matrix Biology: Journal of the International Society for Matrix Biology
https://www.readbyqxmd.com/read/27964993/laminin-is-instructive-and-calmodulin-dependent-kinase-ii-is-non-permissive-for-the-formation-of-complex-aggregates-of-acetylcholine-receptors-on-myotubes-in-culture
#9
Raphael Vezina-Audette, Mathieu Tremblay, Salvatore Carbonetto
Previous work has shown that myotubes cultured on laminin-coated substrates form complex aggregates of synaptic proteins that are similar in shape and composition to neuromuscular junctions (NMJs). Here we show that laminin instructs the location of complex aggregates which form only on the lower surface when laminin is coated onto culture dishes but over the entire cell when laminin is added in solution. Silencing of myotubes by agents that block electrical activity (tetrodotoxin, verapamil) or by inhibitors of calmodulin dependent kinase (CaMKII) render the myotube permissive for the formation of complex aggregates...
December 10, 2016: Matrix Biology: Journal of the International Society for Matrix Biology
https://www.readbyqxmd.com/read/27932299/provisional-matrix-a-role-for-versican-and-hyaluronan
#10
REVIEW
Thomas N Wight
Hyaluronan and versican are extracellular matrix (ECM) components that are enriched in the provisional matrices that form during the early stages of development and disease. These two molecules interact to create pericellular "coats" and "open space" that facilitate cell sorting, proliferation, migration, and survival. Such complexes also impact the recruitment of leukocytes during development and in the early stages of disease. Once thought to be inert components of the ECM that help hold cells together, it is now quite clear that they play important roles in controlling cell phenotype, shaping tissue response to injury and maintaining tissue homeostasis...
December 6, 2016: Matrix Biology: Journal of the International Society for Matrix Biology
https://www.readbyqxmd.com/read/27915093/discoidin-domain-receptor-1-kinase-activity-is-required-for-regulating-collagen-iv-synthesis
#11
Corina M Borza, Yan Su, Truc-Linh Tran, Ling Yu, Nick Steyns, Kayla J Temple, Marcin J Skwark, Jens Meiler, Craig W Lindsley, Brennan R Hicks, Birgit Leitinger, Roy Zent, Ambra Pozzi
Discoidin domain receptor 1 (DDR1) is a receptor tyrosine kinase that binds to and is activated by collagens. DDR1 expression increases following kidney injury and accumulating evidence suggests that it contributes to the progression of injury. To this end, deletion of DDR1 is beneficial in ameliorating kidney injury induced by angiotensin infusion, unilateral ureteral obstruction, or nephrotoxic nephritis. Most of the beneficial effects observed in the DDR1-null mice are attributed to reduced inflammatory cell infiltration to the site of injury, suggesting that DDR1 plays a pro-inflammatory effect...
December 1, 2016: Matrix Biology: Journal of the International Society for Matrix Biology
https://www.readbyqxmd.com/read/27913195/breast-cancer-derived-extracellular-vesicles-stimulate-myofibroblast-differentiation-and-pro-angiogenic-behavior-of-adipose-stem-cells
#12
Young Hye Song, Christine Warncke, Sung Jin Choi, Siyoung Choi, Aaron E Chiou, Lu Ling, Han-Yuan Liu, Susan Daniel, Marc A Antonyak, Richard A Cerione, Claudia Fischbach
Adipose-derived stem cells (ASCs) are abundantly present in the mammary microenvironment and can promote breast cancer malignancy by differentiating into myofibroblasts. However, it remains largely unclear which role tumor-derived extracellular vesicles (TEVs) play in this process. Here, we used microfabricated, type I collagen-based 3-D tissue culture platforms to investigate the effect of breast cancer cell-derived TEVs on ASCs myofibroblast differentiation and consequential changes in extracellular matrix remodeling and vascular sprouting...
November 29, 2016: Matrix Biology: Journal of the International Society for Matrix Biology
https://www.readbyqxmd.com/read/27890389/heparanase-confers-a-growth-advantage-to-differentiating-murine-embryonic-stem-cells-and-enhances-oligodendrocyte-formation
#13
Anqi Xiong, Soumi Kundu, Maud Forsberg, Yuyuan Xiong, Tobias Bergström, Tanja Paavilainen, Lena Kjellén, Jin-Ping Li, Karin Forsberg-Nilsson
Heparan sulfate proteoglycans (HSPGs), ubiquitous components of mammalian cells, play important roles in development and homeostasis. These molecules are located primarily on the cell surface and in the pericellular matrix, where they interact with a multitude of macromolecules, including many growth factors. Manipulation of the enzymes involved in biosynthesis and modification of HSPG structures alters the properties of stem cells. Here, we focus on the involvement of heparanase (HPSE), the sole endo-glucuronidase capable of cleaving of HS, in differentiation of embryonic stem cells into the cells of the neural lineage...
November 23, 2016: Matrix Biology: Journal of the International Society for Matrix Biology
https://www.readbyqxmd.com/read/27884778/expression-of-adipokines-in-osteoarthritis-osteophytes-and-their-effect-on-osteoblasts
#14
Susann Junker, Klaus W Frommer, Grit Krumbholz, Lali Tsiklauri, Rüdiger Gerstberger, Stefan Rehart, Jürgen Steinmeyer, Markus Rickert, Sabine Wenisch, Georg Schett, Ulf Müller-Ladner, Elena Neumann
OBJECTIVE: Osteophyte formation in osteoarthritis (OA) is mediated by increased osteoblast activity, which is -in turn- regulated by the Wnt signaling pathway. Obesity is regarded a risk factor in OA, yet little is known about the interaction between adipose tissue-derived factors, the adipokines, and bone formation, although adipokines are associated with the pathogenesis of OA. Therefore, the effect of adipokines on bone and cartilage forming cells and osteophyte development was analyzed...
November 22, 2016: Matrix Biology: Journal of the International Society for Matrix Biology
https://www.readbyqxmd.com/read/27856308/dysregulation-of-hyaluronan-homeostasis-during-aortic-valve-disease
#15
Varun K Krishnamurthy, Andrew J Stout, Matthew C Sapp, Brittany Matuska, Mark E Lauer, K Jane Grande-Allen
Aortic valve disease (AVD) is one of the leading causes of cardiovascular mortality. Abnormal expression of hyaluronan (HA) and its synthesizing/degrading enzymes have been observed during latent AVD however, the mechanism of impaired HA homeostasis prior to and after the onset of AVD remains unexplored. Transforming growth factor beta (TGFβ) pathway defects and biomechanical dysfunction are hallmarks of AVD, however their association with altered HA regulation is understudied. Expression of HA homeostatic markers was evaluated in diseased human aortic valves and TGFβ1-cultured porcine aortic valve tissues using histology, immunohistochemistry and Western blotting...
November 15, 2016: Matrix Biology: Journal of the International Society for Matrix Biology
https://www.readbyqxmd.com/read/27856309/hedgehog-signalling-acts-upstream-of-laminin-alpha1-transcription-in-the-zebrafish-paraxial-mesoderm
#16
Joseph Pickering, Vincent T Cunliffe, Freek Van Eeden, Anne-Gaëlle Borycki
Laminin-111 (α1β1γ1) is a member of the Laminin family of extra-cellular matrix proteins that comprises 16 members, components of basement membranes. Laminin-111, one of the first Laminin proteins synthesised during embryogenesis, is required for basement membrane deposition and has essential roles in tissue morphogenesis and patterning. Yet, the mechanisms controlling Laminin-111 expression are poorly understood. We generated a zebrafish transgenic reporter line that reproduces faithfully the expression pattern of lama1, the gene encoding Laminin α1, and we used this reporter line to investigate lama1 transcriptional regulation...
November 14, 2016: Matrix Biology: Journal of the International Society for Matrix Biology
https://www.readbyqxmd.com/read/27845198/hyaluronan-35kda-treatment-protects-mice-from-citrobacter-rodentium-infection-and-induces-epithelial-tight-junction-protein-zo-1-in-vivo
#17
Yeojung Kim, Sean P Kessler, Dana R Obery, Craig R Homer, Christine McDonald, Carol A de la Motte
Maintaining a healthy intestinal barrier, the primary physical barrier between intestinal microbiota and the underlying lamina propria, is critical for optimal health. Epithelial integrity is essential for the prevention of the entrance of luminal contents, such as bacteria and their products, through the large intestinal barrier. In this study, we investigated the protective functions of biosynthetic, specific sized, hyaluronan around 35kDa (HA35) on intestinal epithelium in healthy mice, as well as mice infected Citrobacter rodentium, an established model that mimics infection with a serious human pathogen, enteropathogenic E...
November 11, 2016: Matrix Biology: Journal of the International Society for Matrix Biology
https://www.readbyqxmd.com/read/27794444/genotype-phenotype-correlations-in-pathology-caused-by-collagen-type-iv-alpha-1-and-2-mutations
#18
REVIEW
Marion Jeanne, Douglas B Gould
COL4A1 and COL4A2 are extracellular matrix proteins that form heterotrimers and are present in nearly all basement membranes in every organ. In the past decade, COL4A1 and COL4A2 mutations have been identified to cause a multi-system disorder for which penetrance and severity of constituent phenotypes can greatly vary. Here, we compare the outcomes of more than 100 mutations identified in patients and data from a murine allelic series to explore the presence of genotype-phenotype correlations - many of which are shared among other types of collagen...
October 26, 2016: Matrix Biology: Journal of the International Society for Matrix Biology
https://www.readbyqxmd.com/read/27793636/extracellular-matrix-downregulation-in-the-drosophila-heart-preserves-contractile-function-and-improves-lifespan
#19
Ayla O Sessions, Gaurav Kaushik, Sarah Parker, Koen Raedschelders, Rolf Bodmer, Jennifer E Van Eyk, Adam J Engler
Aging is associated with extensive remodeling of the heart, including basement membrane (BM) components that surround cardiomyocytes. Remodeling is thought to impair cardiac mechanotransduction, but the contribution of specific BM components to age-related lateral communication between cardiomyocytes is unclear. Using a genetically tractable, rapidly aging model with sufficient cardiac genetic homology and morphology, e.g. Drosophila melanogaster, we observed differential regulation of BM collagens between laboratory strains, correlating with changes in muscle physiology leading to cardiac dysfunction...
October 25, 2016: Matrix Biology: Journal of the International Society for Matrix Biology
https://www.readbyqxmd.com/read/27914520/matrix-biologists-in-action
#20
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December 2016: Matrix Biology: Journal of the International Society for Matrix Biology
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