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Extracellular matrix chronic wounds

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https://www.readbyqxmd.com/read/28933697/enhanced-skin-regeneration-using-a-novel-amniotic-derived-tissue-graft
#1
Katie C Mowry, Paul P Bonvallet, Susan L Bellis
BACKGROUND: Chronic and recalcitrant wounds present a significant therapeutic challenge. Amniotic tissues contain many regenerative cytokines, growth factors, and extracellular matrix molecules including proteoglycans, hyaluronic acid, and collagens I, III, and IV. Dehydrated amnion/chorion grafts are currently used to treat a variety of wounds such as diabetic foot ulcers and burns. OBJECTIVE: The investigators hypothesized that processing methodologies, dehydration, and hypothermic processing and storage of amniotic tissues would affect overall quality of wound healing; they compared dehydrated amnion/chorion (dHACM) grafts to a novel hypothermically stored amniotic membrane (HSAM) graft in a full-thickness rat wound model...
September 2017: Wounds: a Compendium of Clinical Research and Practice
https://www.readbyqxmd.com/read/28931761/periodontal-induced-chronic-inflammation-triggers-macrophage-secretion-of-ccl12-to-inhibit-fibroblast-mediated-cardiac-wound-healing
#2
Kristine Y DeLeon-Pennell, Rugmani Padmanabhan Iyer, Osasere K Ero, Courtney A Cates, Elizabeth R Flynn, Presley L Cannon, Mira Jung, De'Aries Shannon, Michael R Garrett, William Buchanan, Michael E Hall, Yonggang Ma, Merry L Lindsey
Chronic inflammatory diseases, such as periodontal disease, associate with adverse wound healing in response to myocardial infarction (MI). The goal of this study was to elucidate the molecular basis for impaired cardiac wound healing in the setting of periodontal-induced chronic inflammation. Causal network analysis of 168 inflammatory and extracellular matrix genes revealed that chronic inflammation induced by a subseptic dose of Porphyromonas gingivalis lipopolysaccharide (LPS) exacerbated infarct expression of the proinflammatory cytokine Ccl12...
September 21, 2017: JCI Insight
https://www.readbyqxmd.com/read/28880053/liver-fibrosis-the-2017-state-of-art
#3
Gian P Caviglia, Chiara Rosso, Sharmila Fagoonee, Giorgio M Saracco, Rinaldo Pellicano
Liver fibrosis is a wound-healing response to a wide spectrum of chronic liver injuries. It is characterized by loss of hepatocytes and alteration in hepatic architecture following an imbalance between extracellular matrix synthesis and degradation. Irrespectively of underlying etiology, fibrosis may progress to cirrhosis and specific pathogenetic mechanisms as well as different disease patterns may be identified according to etiology. Liver biopsy is still considered the gold standard for fibrosis assessment, despite the fact that it is invasive, has poor patient compliance and is not exempt of complications...
September 5, 2017: Panminerva Medica
https://www.readbyqxmd.com/read/28867635/effect-of-human-placental-extract-in-the-management-of-biofilm-mediated-drug-resistance-a-focus-on-wound-management
#4
Sutapa Goswami, Ratul Sarkar, Pritam Saha, Amit Maity, Tridib Sarkar, Debmalya Das, Piyali Datta Chakraborty, Subhasri Bandyopadhyay, Chandan Kumar Ghosh, Sanmoy Karmakar, Tuhinadri Sen
Management of infectious wounds, particularly chronic wounds and burn injuries, is a matter of global concern. Worldwide estimates reveal that, billions of dollars are being spent annually for the management of such chronic ailments. Evidently, bacterial biofilms pose a greater problem in the effective management of infection in chronic wounds, since most of the currently available antibiotics are unable to act on the microorganisms residing inside the protected environment of the biofilms. Accordingly, in the present study, we have attempted to evaluate the anti-biofilm properties of human placental extract (PLX) and also other virulence factors that are mediated via the quorum sensing (QS) signalling system...
September 1, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/28863189/opposing-effects-of-in-vitro-differentiated-macrophages-sub-type-on-epithelial-wound-healing
#5
Julia A Gindele, Samuel Mang, Nicolas Pairet, Ingrid Christ, Florian Gantner, Jürgen Schymeinsky, David J Lamb
Inappropriate repair responses to pulmonary epithelial injury have been linked to perturbation of epithelial barrier function and airway remodelling in a number of respiratory diseases, including chronic obstructive pulmonary disease and idiopathic pulmonary fibrosis. We developed an in vitro mechanical scratch injury model in air-liquid interface differentiated primary human small airway epithelial cells that recapitulates many of the characteristics observed during epithelial wound injury in both human tissue and small animal models...
2017: PloS One
https://www.readbyqxmd.com/read/28829074/recent-advances-in-biomaterials-for-the-treatment-of-diabetic-foot-ulcers
#6
REVIEW
Lisa N Kasiewicz, Kathryn A Whitehead
Diabetes mellitus is one of the most challenging epidemics facing the world today, with over 300 million patients affected worldwide. A significant complication associated with diabetes is hyperglycemia, which impairs wound healing. The rise in the diabetic patient population in recent years has precipitated an increase in the incidence and prevalence of chronic diabetic wounds, most commonly the diabetic foot ulcer. Although foot ulcers are difficult to treat due to their complicated pathology, outcomes have improved with the development of increasingly sophisticated biomaterials that accelerate healing...
August 22, 2017: Biomaterials Science
https://www.readbyqxmd.com/read/28777013/investigational-drugs-for-idiopathic-pulmonary-fibrosis
#7
REVIEW
Francesco Varone, Giuliano Montemurro, Francesco Macagno, Mariarosaria Calvello, Emanuele Conte, Enrica Intini, Bruno Iovene, Paolo Maria Leone, Pier-Valerio Mari, Luca Richeldi
IPF is a specific form of chronic fibrosing interstitial pneumonia of unknown cause, characterized by progressive worsening in lung function and an unfavorable prognosis. Current concepts on IPF pathogenesis are based on a dysregulated wound healing response, leading to an over production of extracellular matrix. Based on recent research however, several other mechanisms are now proposed as potential targets for novel therapeutic strategies. Areas covered: This review analyzes the current investigational strategies targeting extracellular matrix deposition, tyrosine-kinase antagonism, immune and autoimmune response, and cell-based therapy...
September 2017: Expert Opinion on Investigational Drugs
https://www.readbyqxmd.com/read/28763512/a-glycan-based-approach-to-therapeutic-angiogenesis
#8
Jie Shi Chua, Vy M Tran, Mausam Kalita, Maritza V Quintero, Orlando Antelope, Geethu Muruganandam, Yukio Saijoh, Balagurunathan Kuberan
Angiogenesis, the sprouting of new blood vessels from existing vasculature, involves multiple complex biological processes, and it is an essential step for hemostasis, tissue healing and regeneration. Angiogenesis stimulants can ameliorate human disease conditions including limb ischemia, chronic wounds, heart disease, and stroke. The current strategies to improve the bioavailability of pro-angiogenic growth factors, including VEGF and FGF2, have remained largely unsuccessful. This study demonstrates that small molecules, termed click-xylosides, can promote angiogenesis in the in vitro matrigel tube formation assay and the ex ovo chick chorioallantoic membrane assay, depending on their aglycone moieties...
2017: PloS One
https://www.readbyqxmd.com/read/28760545/reactive-carbonyl-compounds-impair-wound-healing-by-vimentin-collapse-and-loss-of-the-primary-cilium
#9
Lara Rodríguez-Ribera, Craig Slattery, Tara Mc Morrow, Ricard Marcos, Susana Pastor
In renal pathologies tubulo-interstitial fibrosis results from an aberrant wound-healing ability where the normal epithelial tissue is substituted for scar tissue caused by accumulation of extracellular matrix proteins (ECM). During the wound-healing process, epithelial cells may undergo epithelial-mesenchymal transition (EMT) acquiring a mesenchymal-like phenotype that allows cells to migrate and re-epithelialize the wound site. It has been reported that chronic inflammation and uremic milieu are involved in wound-healing and enhanced kidney damage in chronic kidney disease (CKD) patients...
July 29, 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/28759431/venous-ulcers-treated-with-a-hyaluronic-acid-extracellular-matrix-and-compression-therapy-interim-analysis-of-a-randomized-controlled-trial
#10
Oscar M Alvarez, Lee Makowitz, Mayank Patel
Diabetic foot ulcers (DFUs) are a severe and costly complication of diabetes and may result in foot amputation. CASE REPORT: A 69-year-old man with a 10-year history of type 2 diabetes, who was undergoing routine care for diabetes in the authors' clinic, developed a DFU of his right foot of 4 years' duration. The wound did not respond to conventional treatments, and imaging studies were normal. His 2 biopsies tested negative for malignancy. The DFU was fully removed surgically. Following surgical removal, squamous cell carcinoma (SCC) was diagnosed in the histologic study of the wound...
July 2017: Wounds: a Compendium of Clinical Research and Practice
https://www.readbyqxmd.com/read/28757565/the-pharmaceutical-device-prisma-%C3%A2-skin-promotes-in-vitro-angiogenesis-through-endothelial-to-mesenchymal-transition-during-skin-wound-healing
#11
Raffaella Belvedere, Valentina Bizzarro, Luca Parente, Francesco Petrella, Antonello Petrella
Glycosaminoglycans are polysaccharides of the extracellular matrix supporting skin wound closure. Mesoglycan is a mixture of glycosaminoglycans such as chondroitin-, dermatan-, heparan-sulfate and heparin and is the main component of Prisma(®) Skin, a pharmaceutical device developed by Mediolanum Farmaceutici S.p.a. Here, we show the in vitro effects of this device in the new vessels formation by endothelial cells, since angiogenesis represents a key moment in wound healing. We found a strong increase of migration and invasion rates of these cells treated with mesoglycan and Prisma(®) Skin which mediate the activation of the pathway triggered by CD44 receptor...
July 25, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28752029/advances-in-ultrasound-targeted-microbubble-mediated-gene-therapy-for-liver-fibrosis
#12
REVIEW
Cuiyuan Huang, Hong Zhang, Ruidan Bai
Hepatic fibrosis develops as a wound-healing scar in response to acute and chronic liver inflammation and can lead to cirrhosis in patients with chronic hepatitis B and C. The condition arises due to increased synthesis and reduced degradation of extracellular matrix (ECM) and is a common pathological sequela of chronic liver disease. Excessive deposition of ECM in the liver causes liver dysfunction, ascites, and eventually upper gastrointestinal bleeding as well as a series of complications. However, fibrosis can be reversed before developing into cirrhosis and has thus been the subject of extensive researches particularly at the gene level...
July 2017: Acta Pharmaceutica Sinica. B
https://www.readbyqxmd.com/read/28740415/the-extracellular-matrix-of-eggshell-displays-anti-inflammatory-activities-through-nf-%C3%AE%C2%BAb-in-lps-triggered-human-immune-cells
#13
Tram T Vuong, Sissel B Rønning, Henri-Pierre Suso, Ralf Schmidt, Kristian Prydz, Marlene Lundström, Anders Moen, Mona E Pedersen
Avian eggshell membrane (ESM) is a natural biomaterial that has been used as an alternative natural bandage on burned and cut skin injuries for >400 years in Asian countries, and is available in large quantities from egg industries. Our aim was to characterize ESM that was separated and processed from egg waste, and to study whether this material possesses anti-inflammatory properties, making it suitable as an ingredient in industrial production of low cost wound healing products. Our results show that the processed ESM particles retain a fibrous structure similar to that observed for the native membrane, and contain collagen, and carbohydrate components such as hyaluronic acid and sulfated glycosaminoglycans, as well as N-glycans, mostly with uncharged structures...
2017: Journal of Inflammation Research
https://www.readbyqxmd.com/read/28730726/changes-in-the-extracellular-matrix-surrounding-human-chronic-wounds-revealed-by-2-photon-imaging
#14
Jessica E S Sutcliffe, Christopher Thrasivoulou, Thomas E Serena, Leigh Madden, Toby Richards, Anthony R J Phillips, David L Becker
Chronic wounds are a growing problem worldwide with no effective therapeutic treatments available. Our objective was to understand the composition of the dermal tissue surrounding venous leg ulcers and diabetic foot ulcers (DFU). We used novel 2-photon imaging techniques alongside classical histology to examine biopsies from the edges of two common types of chronic wound, venous leg ulcers and DFU. Compared to normal intact skin, we found that collagen levels are significantly reduced throughout the dermis of venous leg ulcer biopsies and DFU, with a reduction in both fibril thickness and abundance...
July 20, 2017: International Wound Journal
https://www.readbyqxmd.com/read/28714933/macrophage-phenotypes-regulate-scar-formation-and-chronic-wound-healing
#15
REVIEW
Mark Hesketh, Katherine B Sahin, Zoe E West, Rachael Z Murray
Macrophages and inflammation play a beneficial role during wound repair with macrophages regulating a wide range of processes, such as removal of dead cells, debris and pathogens, through to extracellular matrix deposition re-vascularisation and wound re-epithelialisation. To perform this range of functions, these cells develop distinct phenotypes over the course of wound healing. They can present with a pro-inflammatory M1 phenotype, more often found in the early stages of repair, through to anti-inflammatory M2 phenotypes that are pro-repair in the latter stages of wound healing...
July 17, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28712679/the-molecular-biology-in-wound-healing-non-healing-wound
#16
REVIEW
Chun Qing
The development of molecular biology and other new biotechnologies helps us to recognize the wound healing and non-healing wound of skin in the past 30 years. This review mainly focuses on the molecular biology of many cytokines (including growth factors) and other molecular factors such as extracellular matrix (ECM) on wound healing. The molecular biology in cell movement such as epidermal cells in wound healing was also discussed. Moreover many common chronic wounds such as pressure ulcers, leg ulcers, diabetic foot wounds, venous stasis ulcers, etc...
August 2017: Chinese Journal of Traumatology, Zhonghua Chuang Shang za Zhi
https://www.readbyqxmd.com/read/28711023/gingival-crevicular-fluid-and-plasma-oxidative-stress-markers-and-tgm-2-levels-in-chronic-periodontitis
#17
Sema Becerik, Veli Özgen Öztürk, Peter Celec, Natalia Kamodyova, Gül Atilla, Gülnur Emingil
OBJECTIVE: This study was aimed to evaluate the gingival crevicular fluid (GCF) and plasma transglutaminase-2 (TGM-2), total antioxidant capacity (TAC), total oxidant status (TOS), ferric reducing antioxidant power (FRAP) and thiobarbituric acid reactive substances (TBARS) in patients with chronic periodontal disease. MATERIALS AND METHODS: Twenty patients with chronic periodontitis (CP), 20 patients with gingivitis and 20 healthy subjects were enrolled in the study...
June 29, 2017: Archives of Oral Biology
https://www.readbyqxmd.com/read/28699352/redox-signaling-in-diabetic-wound-healing-regulates-extracellular-matrix-deposition
#18
Britta Kunkemoeller, Themis R Kyriakides
SIGNIFICANCE: Impaired wound healing is a major complication of diabetes, and can lead to development of chronic foot ulcers in a significant number of patients. Despite the danger posed by poor healing, very few specific therapies exist, leaving patients at risk of hospitalization, amputation, and further decline in overall health. Recent Advances: Redox signaling is a key regulator of wound healing, especially through its influence on the extracellular matrix (ECM). Normal redox signaling is disrupted in diabetes leading to several pathological mechanisms that alter the balance between reactive oxygen species (ROS) generation and scavenging...
October 20, 2017: Antioxidants & Redox Signaling
https://www.readbyqxmd.com/read/28690200/functional-electrospun-fibers-for-the-treatment-of-human-skin-wounds
#19
REVIEW
Jing Wang, Maike Windbergs
Wounds are trauma induced defects of the human skin involving a multitude of endogenous biochemical events and cellular reactions of the immune system. The healing process is extremely complex and affected by the patient's physiological conditions, potential implications like infectious pathogens and inflammation as well as external factors. Due to increasing incidence of chronic wounds and proceeding resistance of infection pathogens, there is a strong need for effective therapeutic wound care. In this context, electrospun fibers with diameters in the nano- to micrometer range gain increasing interest...
October 2017: European Journal of Pharmaceutics and Biopharmaceutics
https://www.readbyqxmd.com/read/28682297/wound-biofilm-current-perspectives-and-strategies-on-biofilm-disruption-and-treatments
#20
Robert J Snyder, Greg Bohn, Jason Hanft, Larry Harkless, Paul Kim, Larry Lavery, Greg Schultz, Randy Wolcott
The presence of bio lm remains a challenging factor that contributes to the delayed healing of many chronic wounds. The major threat of chronic wound bio lms is their substantial protection from host immunities and extreme tolerance to antimicrobial agents. To help guide the development of wound treatment strategies, a panel of experts experienced in clinical and laboratory aspects of biofilm convened to discuss what is understood and not yet understood about biofilms and what is needed to better identify and treat chronic wounds in which biofilm is suspected...
June 2017: Wounds: a Compendium of Clinical Research and Practice
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