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Extracellular matrix chronic wounds

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https://www.readbyqxmd.com/read/27891773/cigarette-smoke-alters-the-secretome-of-lung-epithelial-cells
#1
Alessandra Mossina, Christina Lukas, Juliane Merl-Pham, Franziska E Uhl, Kathrin Mutze, Andrea Schamberger, Claudia Staab-Weijnitz, Jie Jia, Ali Ö Yildirim, Melanie Königshoff, Stefanie M Hauck, Oliver Eickelberg, Silke Meiners
Cigarette smoke is the most relevant risk factor for the development of lung cancer and chronic obstructive pulmonary disease (COPD). Many of its more than 4500 chemicals are highly reactive thereby altering protein structure and function. Here, we used subcellular fractionation coupled to label-free quantitative mass spectrometry to globally assess alterations in the proteome of different compartments of lung epithelial cells upon exposure to cigarette smoke extract. Proteomic profiling of the human alveolar-derived cell line A549 revealed the most pronounced changes within the cellular secretome with preferential downregulation of proteins involved in wound healing and extracellular matrix (ECM) organization...
November 28, 2016: Proteomics
https://www.readbyqxmd.com/read/27883184/epigenetics-in-reactive-and-reparative-cardiac-fibrogenesis-the-promise-of-epigenetic-therapy
#2
REVIEW
Asish K Ghosh, Rahul Rai, Panagiotis Flevaris, Douglas E Vaughan
Epigenetic changes play a pivotal role in the development of a wide spectrum of human diseases including cardiovascular diseases, cancer, diabetes, and intellectual disabilities. Cardiac fibrogenesis is a common pathophysiological process seen during chronic and stress-induced accelerated cardiac aging. While adequate production of extracellular matrix (ECM) proteins is necessary for post-injury wound healing, excessive synthesis and accumulation of extracellular matrix protein in the stressed or injured hearts causes decreased or loss of lusitropy that leads to cardiac failure...
November 24, 2016: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/27875272/tenascin-c-at-a-glance
#3
REVIEW
Kim S Midwood, Matthias Chiquet, Richard P Tucker, Gertraud Orend
Tenascin-C (TNC) is a hexameric, multimodular extracellular matrix protein with several molecular forms that are created through alternative splicing and protein modifications. It is highly conserved amongst vertebrates, and molecular phylogeny indicates that it evolved before fibronectin. Tenascin-C has many extracellular binding partners, including matrix components, soluble factors and pathogens; it also influences cell phenotype directly through interactions with cell surface receptors. Tenascin-C protein synthesis is tightly regulated, with widespread protein distribution in embryonic tissues, but restricted distribution of tenascin-C in adult tissues...
December 1, 2016: Journal of Cell Science
https://www.readbyqxmd.com/read/27867754/a-small-chimeric-fibronectin-fragment-accelerates-dermal-wound-repair-in-diabetic-mice
#4
Denise C Hocking, James R Brennan, Carol H Raeman
Objective: During wound repair, soluble fibronectin is converted into biologically active, insoluble fibrils via a cell-mediated process. This fibrillar, extracellular matrix (ECM) form of fibronectin stimulates cell processes critical to tissue repair. Nonhealing wounds show reduced levels of ECM fibronectin fibrils. The objective of this study was to produce a small, recombinant wound supplement with the biological activity of insoluble fibronectin fibrils. Approach: A chimeric fibronectin fragment was produced by inserting the integrin-binding Arg-Gly-Asp (RGD) loop from the tenth type III repeat of fibronectin (FNIII10) into the analogous site within the heparin-binding, bioactive fragment of the first type III repeat (FNIII1H)...
November 1, 2016: Advances in Wound Care
https://www.readbyqxmd.com/read/27864804/activity-of-norspermidine-on-bacterial-biofilms-of-multidrug-resistant-clinical-isolates-associated-with-persistent-extremity-wound-infections
#5
Anthony P Cardile, Ronald L Woodbury, Carlos J Sanchez, Sandra C Becerra, Rebecca A Garcia, Katrin Mende, Joseph C Wenke, Kevin S Akers
Biofilm formation is a major virulence factor for numerous pathogenic bacteria and is cited as a central event in the pathogenesis of chronic human infections, which is in large part due to excessive extracellular matrix secretion and metabolic changes that occur within the biofilm rendering them highly tolerant to antimicrobial treatments. Polyamines, including norspermidine, play central roles in bacterial biofilm development, but have also recently been shown to inhibit biofilm formation in select strains of various pathogenic bacteria...
November 19, 2016: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/27853690/superficial-burn-wound-healing-with-intermittent-negative-pressure-wound-therapy-under-limited-access-and-conventional-dressings
#6
Thittamaranahalli Muguregowda Honnegowda, Echalasara Govindarama Padmanabha Udupa, Pragna Rao, Pramod Kumar, Rekha Singh
BACKGROUND: Thermal injury is associated with several biochemical and histopathological alteration in tissue. Analysis of these objective parameters in research and clinical field are common to determine healing rate of burn wound. Negative pressure wound therapy has been achieved wide success in treating chronic wounds. This study determines superficial burn wound healing with intermittent negative pressure wound therapy under limited access and conventional dressings. METHODS: A total 50 patients were randomised into two equal groups: limited access and conventional dressing groups...
September 2016: World Journal of Plastic Surgery
https://www.readbyqxmd.com/read/27826469/a-novel-reticular-dermal-graft-leverages-architectural-and-biological-properties-to-support-wound-repair
#7
Anouska Dasgupta, Dennis Orgill, Robert D Galiano, Charles M Zelen, Yen-Chen Huang, Evangelia Chnari, William W Li
BACKGROUND: Acellular dermal matrices (ADMs) are frequently used in reconstructive surgery and as scaffolds to treat chronic wounds. The 3-dimensional architecture and extracellular matrix provide structural and signaling cues for repair and remodeling. However, most ADMs are not uniformly porous, which can lead to heterogeneous host engraftment. In this study, we hypothesized that a novel human reticular ADM (HR-ADM; AlloPatch Pliable, Musculoskeletal Transplant Foundation, Edison, N...
October 2016: Plastic and Reconstructive Surgery. Global Open
https://www.readbyqxmd.com/read/27825864/novel-nanofibrous-dressings-containing-rhegf-and-aloe-vera-for-wound-healing-applications
#8
I García-Orue, G Gainza, F B Gutierrez, J J Aguirre, C Evora, J L Pedraz, R M Hernandez, A Delgado, M Igartua
Nanofibrous membranes produced by electrospinning possess a large surface area-to-volume ratio, which mimics the three-dimensional structure of the extracellular matrix. Thus, nanofibrous dressings are a promising alternative for chronic wound healing, since they can replace the natural ECM until it is repaired. Therefore, in this study we have developed a PLGA nanofibrous membrane that contains recombinant human Epidermal Growth Factor (rhEGF) and Aloe vera (AV) extract. Both of them promote wound healing, as EGF is a wound healing mediator and AV stimulates the proliferation and activity of fibroblast...
November 4, 2016: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/27785379/extracellular-bacterial-proteases-in-chronic-wounds-a-potential-therapeutic-target
#9
REVIEW
Louise Suleman
Significance: Bacterial biofilms are considered to be responsible for over 80% of persistent infections, including chronic lung infections, osteomyelitis, periodontitis, endocarditis, and chronic wounds. Over 60% of chronic wounds are colonized with bacteria that reside within a biofilm. The exaggerated proteolytic environment of chronic wounds, more specifically elevated matrix metalloproteinases, is thought to be one of the possible reasons as to why chronic wounds fail to heal. However, the role of bacterial proteases within chronic wounds is not fully understood...
October 1, 2016: Advances in Wound Care
https://www.readbyqxmd.com/read/27701126/management-of-open-distal-lower-extremity-wounds-with-exposed-tendons-using-porcine-urinary-bladder-matrix
#10
Scott E Geiger, Olivier A Deigni, John Tracy Watson, Bruce A Kraemer
: Open wounds of the distal third of the leg and foot with an exposed tendon present a challenge in wound management and in attaining stable, durable coverage. The mobility of the tendon often leads to chronic inflammation that impedes wound closure, while the desiccation of the exposed tendon leads to progressive tendon necrosis. For the authors' cases, the ability of extracellular matrix (ECM) products to modulate wound bed inflammation and facilitate constructive remodeling of a wound seemed a reasonable approach in treating these wounds, especially in patients who are often poor surgical candidates for more advanced reconstructive procedures...
September 2016: Wounds: a Compendium of Clinical Research and Practice
https://www.readbyqxmd.com/read/27679957/transcriptional-analysis-reveals-evidence-of-chronically-impeded-ecm-turnover-and-epithelium-to-mesenchyme-transition-in-scar-tissue-giving-rise-to-marjolin-s-ulcer
#11
Sarthak Sinha, Samuel Su, Matthew Workentine, Natacha Agabalyan, Min Cheng, Vincent Gabriel, Jeff Biernaskie
Marjolin's ulcer (MU) is an aggressive malignancy arising within chronic wounds. A major cause is unhealed burn injuries. This results in well-differentiated squamous cell carcinoma (SCC). This study aimed to elucidate transcriptional changes leading to malignancy by investigating differentially expressed genes in squamous cells present in a SCC compared with MU. MU tumor cells were isolated from histologically confirmed biopsy of SCC within an unhealed burn scar. Epithelial cells (ECs) adjacent to the tumor were co-isolated and a SCC cell line was commercially purchased...
September 20, 2016: Journal of Burn Care & Research: Official Publication of the American Burn Association
https://www.readbyqxmd.com/read/27633729/anti-hepatic-fibrosis-effects-of-a-novel-turtle-shell-decoction-by-inhibiting-hepatic-stellate-cell-proliferation-and-blocking-tgf-%C3%AE-1-smad-signaling-pathway-in-rats
#12
Ganping Bai, Guohe Yan, Guojian Wang, Ping Wan, Ronghua Zhang
Hepatic fibrosis (HF), a wound-healing response to a variety of chronic stimuli, is characterized by the excessive synthesis of extracellular matrix (ECM) proteins by hepatic stellate cells (HSC) and eventually the development of hepatic cirrhosis. Turtle shell pill (TSP) is a common traditional Chinese medicine used for preventing and treating HF and early hepatic cirrhosis, but its side-effects and the shortage of ingredients limit its clinical application. In addition, its mechanism of action is not clear...
September 9, 2016: Oncology Reports
https://www.readbyqxmd.com/read/27556754/a-review-of-cellular-and-acellular-matrix-products-indications-techniques-and-outcomes
#13
Olivia B Hughes, Adele Rakosi, Flor Macquhae, Ingrid Herskovitz, Joshua D Fox, Robert S Kirsner
BACKGROUND: Wound healing is a dynamic process whereby cells, growth factors (GFs), and the extracellular matrix (ECM) interact to restore the architecture of damaged tissue. Chronic wounds can be difficult to treat due to the increased presence of inflammatory cells that degrade the ECM, GF, and cells necessary for wound healing to occur. Cellular and acellular matrix products can be used in the management of a variety of chronic wounds including venous, diabetic, and pressure ulcers and other conditions such as burns, epidermolysis bullosa, pyoderma gangrenosum, and surgical wounds...
September 2016: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/27556351/the-role-of-plasminogen-activator-inhibitor-type-1-in-fibrosis
#14
Panagiotis Flevaris, Douglas Vaughan
Extracellular matrix (ECM) deposition during wound healing is a physiological response to an insult. Wound healing becomes deregulated in the setting of chronic injury or long-standing metabolic disease, leading to the accumulation of ECM components and fibrosis. Matrix protein turnover is determined by the rate of synthesis as well as the rate of proteolytic degradation and clearance by matrix metalloproteinases (MMPs). The persistent activation of interstitial myofibroblasts, coupled with defects in matrix proteolysis, ultimately disrupts tissue architecture and leads to biochemical and mechanical organ dysfunction with eventual organ failure...
August 24, 2016: Seminars in Thrombosis and Hemostasis
https://www.readbyqxmd.com/read/27547189/engineered-biopolymeric-scaffolds-for-chronic-wound-healing
#15
REVIEW
Laura E Dickinson, Sharon Gerecht
Skin regeneration requires the coordinated integration of concomitant biological and molecular events in the extracellular wound environment during overlapping phases of inflammation, proliferation, and matrix remodeling. This process is highly efficient during normal wound healing. However, chronic wounds fail to progress through the ordered and reparative wound healing process and are unable to heal, requiring long-term treatment at high costs. There are many advanced skin substitutes, which mostly comprise bioactive dressings containing mammalian derived matrix components, and/or human cells, in clinical use...
2016: Frontiers in Physiology
https://www.readbyqxmd.com/read/27545813/structural-and-functional-insights-into-the-interaction-of-sulfated-glycosaminoglycans-with-tissue-inhibitor-of-metalloproteinase-3-a-possible-regulatory-role-on-extracellular-matrix-homeostasis
#16
Sandra Rother, Sergey A Samsonov, Tommy Hofmann, Joanna Blaszkiewicz, Sebastian Köhling, Stephanie Moeller, Matthias Schnabelrauch, Jörg Rademann, Stefan Kalkhof, Martin von Bergen, M Teresa Pisabarro, Dieter Scharnweber, Vera Hintze
: An imbalance between tissue-degrading matrix metalloproteinases (MMPs) and their counterparts' tissue inhibitors of metalloproteinases (TIMPs) causes pathologic extracellular matrix (ECM) degradation in chronic wounds and requires new adaptive biomaterials that interact with these regulators to re-establish their balance. Sulfated glycosaminoglycans (GAGs) and TIMP-3 are key modulators of tissue formation and remodeling. However, little is known about their molecular interplay. GAG/TIMP-3 interactions were characterized combining surface plasmon resonance, ELISA, molecular modeling and hydrogen/deuterium exchange mass spectrometry...
November 2016: Acta Biomaterialia
https://www.readbyqxmd.com/read/27534415/hepatic-stellate-cells-in-liver-fibrosis-and-sirna-based-therapy
#17
Refaat Omar, Jiaqi Yang, Haoyuan Liu, Neal M Davies, Yuewen Gong
Hepatic fibrosis is a reversible wound-healing response to either acute or chronic liver injury caused by hepatitis B or C, alcohol, and toxic agents. Hepatic fibrosis is characterized by excessive accumulation and reduced degradation of extracellular matrix (ECM). Excessive accumulation of ECM alters the hepatic architecture leading to liver fibrosis and cirrhosis. Cirrhosis results in failure of common functions of the liver. Hepatic stellate cells (HSC) play a major role in the development of liver fibrosis as HSC are the main source of the excessive production of ECM in an injured liver...
2016: Reviews of Physiology, Biochemistry and Pharmacology
https://www.readbyqxmd.com/read/27503828/significantly-accelerated-wound-healing-of-full-thickness-skin-using-a-novel-composite-gel-of-porcine-acellular-dermal-matrix-and-human-peripheral-blood-cells
#18
Vijay K Kuna, Arvind M Padma, Joakim Håkansson, Jan Nygren, Robert Sjöback, Sarunas Petronis, Suchitra Sumitran-Holgersson
Herein, we report the fabrication of a novel composite gel from decellularized gal-gal-knockout porcine skin and human peripheral blood mononuclear cells (hPBMC) for full-thickness skin wound healing. Decellularized skin extracellular matrix (ECM) powder was prepared via chemical treatment, freeze-drying and homogenization. The powder was mixed with culture medium containing hyaluronic acid to generate a pig skin gel (PSG). The effect of the gel in regeneration of full-thickness wound was studied in nude mice...
August 5, 2016: Cell Transplantation
https://www.readbyqxmd.com/read/27450733/thymosin-beta-4-is-a-potential-regulator-of-hepatic-stellate-cells
#19
J Kim, Y Jung
Liver fibrosis, a major characteristic of chronic liver disease, is inappropriate tissue remodeling caused by prolonged parenchymal cell injury and inflammation. During liver injury, hepatic stellate cells (HSCs) undergo transdifferentiation from quiescent HSCs into activated HSCs, which promote the deposition of extracellular matrix proteins, leading to liver fibrosis. Thymosin beta 4 (Tβ4), a major actin-sequestering protein, is the most abundant member of the highly conserved β-thymosin family and controls cell morphogenesis and motility by regulating the dynamics of the actin cytoskeleton...
2016: Vitamins and Hormones
https://www.readbyqxmd.com/read/27405842/evaluation-of-physiological-risk-factors-oxidant-antioxidant-imbalance-proteolytic-and-genetic-variations-of-matrix-metalloproteinase-9-in-patients-with-pressure-ulcer
#20
Khlifi Latifa, Sahli Sondess, Graiet Hajer, Ben-Hadj-Mohamed Manel, Khelil Souhir, Bouzidi Nadia, Jaballah Abir, Ferchichi Salima, Miled Abdelhedi
Pressure ulcer (PU) remains a common worldwide problem in all health care settings, it is synonymous with suffering. PU is a complex disease that is dependent on a number of interrelated factors. It involves multiple mechanisms such as physiological risk factors, chronic inflammation, oxidant-antioxidant imbalance and proteolytic attack on extracellular matrix by matrix metalloproteinases (MMP). Therefore, we propose that these wounds lead to molecular variations that can be detected by assessing biomarkers...
2016: Scientific Reports
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