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Extracellular matrix chronic wounds

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https://www.readbyqxmd.com/read/28714933/macrophage-phenotypes-regulate-scar-formation-and-chronic-wound-healing
#1
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
#2
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...
June 30, 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
#3
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
#4
Britta Kunkemoeller, Themis Kyriakides
SIGNIFICANCE: Impaired wound healing is a major complication of diabetes, and can lead to development of chronic foot ulcers in a significant portion of patient. 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...
July 12, 2017: Antioxidants & Redox Signaling
https://www.readbyqxmd.com/read/28690200/functional-electrospun-fibers-for-the-treatment-of-human-skin-wounds
#5
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 patient́s 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...
July 6, 2017: European Journal of Pharmaceutics and Biopharmaceutics
https://www.readbyqxmd.com/read/28682297/wound-biofilm-current-perspectives-and-strategies-on-biofilm-disruption-and-treatments
#6
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
https://www.readbyqxmd.com/read/28676094/cultured-epidermal-stem-cells-in-regenerative-medicine
#7
REVIEW
Catherine J Jackson, Kim Alexander Tønseth, Tor Paaske Utheim
Transplantation of cultured epidermal cell sheets (CES) has long been used to treat patients with burns, chronic wounds, and stable vitiligo. In patients with large area burns this can be a life-saving procedure. The ultimate goal, however, is to restore all normal functions of the skin and prevent scar formation. Increased focus on the incorporation of epidermal stem cells (EpiSCs) within CES transplants may ultimately prove to be key to achieving this. Transplanted EpiSCs contribute to restoring the complete epidermis and provide long-term renewal...
July 4, 2017: Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/28665039/anterior-gradient-2-agr2-is-induced-in-cutaneous-wound-and-promotes-wound-healing-through-its-adhesion-domain
#8
Qi Zhu, Hitesh Bhagavanbhai Mangukiya, Dhahiri Saidi Mashausi, Hao Guo, Hema Negi, Siva Bharath Merugu, Zhenghua Wu, Dawei Li
Anterior Gradient 2 (AGR2), a member of protein disulfide isomerase (PDI) family, is both located in cytoplasm and secreted into extracellular matrix. The orthologs of AGR2 have been linked to limb regeneration in newt and wound healing in zebrafish. In mammals, AGR2 influences multiple cell signaling pathways in tumor formation as well as in normal cell functions related to new tissue formation like angiogenesis. However, the function of AGR2 in mammalian wound healing remains unknown. This study aimed to investigate AGR2 expression and its function during skin wound healing and the possible application of external AGR2 in cutaneous wound to accelerate the healing process...
June 30, 2017: FEBS Journal
https://www.readbyqxmd.com/read/28656009/role-of-microbial-agents-in-pulmonary-fibrosis%C3%A2
#9
REVIEW
Ozioma S Chioma, Wonder P Drake
Pulmonary fibrosis is a form of lung disease that develops due to aberrant wound-healing following repeated alveoli injury in genetically susceptible individuals, resulting in chronic inflammation, excess deposition of the extracellular matrix components, mainly collagen, and scarring of lung tissue. In addition to irradiation, environmental agents such occupational inhalants, and chemotherapeutic agents, microbial agents also play a role in the etiology of the disease. While viruses have received the most attention, emerging evidence suggest that bacteria and fungi also play a part in the etiology of pulmonary fibrosis...
June 2017: Yale Journal of Biology and Medicine
https://www.readbyqxmd.com/read/28650705/current-and-emerging-treatments-for-postsurgical-cleft-lip-scarring-effectiveness-and-mechanisms
#10
E Papathanasiou, C A Trotman, A R Scott, T E Van Dyke
Cleft lip with or without cleft palate is the most common congenital malformation of the head and the third-most common birth defect. Surgical repair of the lip is the only treatment and is usually performed during the first year of life. Hypertrophic scar (HTS) formation is a frequent postoperative complication that impairs soft tissue form, function, or movement. Multiple lip revision operations are often required throughout childhood, attempting to optimize aesthetics and function. The mechanisms guiding HTS formation are multifactorial and complex...
June 1, 2017: Journal of Dental Research
https://www.readbyqxmd.com/read/28646530/pirfenidone-reduces-subchondral-bone-loss-and-fibrosis-after-murine-knee-cartilage-injury
#11
Deva D Chan, Jun Li, Wei Luo, Dan N Predescu, Brian J Cole, Anna Plaas
Pirfenidone is an anti-inflammatory and anti-fibrotic drug that has shown efficacy in lung and kidney fibrosis. Because inflammation and fibrosis have been linked to the progression of osteoarthritis, we investigated the effects of oral Pirfenidone in a mouse model of cartilage injury, which results in chronic inflammation and joint-wide fibrosis in mice that lack hyaluronan synthase 1 (Has1(-/-) ) in comparison to wild-type. Femoral cartilage was surgically injured in wild-type and Has1(-/-) mice, and Pirfenidone was administered in food starting after 3 days...
June 23, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/28636254/a-histological-and-reference-system-for-the-analysis-of-mouse-intervertebral-disc
#12
Vivian Tam, Wilson C W Chan, Victor Y L Leung, Kathryn S E Cheah, Kenneth M C Cheung, Daisuke Sakai, Matthew R McCann, Jake Bedore, Cheryle A Séguin, Danny Chan
A new scoring system based on histo-morphology of mouse intervertebral disc (IVD) was established to assess changes in different mouse models of IVD degeneration and repair. IVDs from mouse strains of different ages, transgenic mice, or models of artificially-induced IVD degeneration were assessed. Morphological features consistently observed in normal, and early/later stages of degeneration were categorised into a scoring system focused on nucleus pulposus (NP) and annulus fibrosus (AF) changes. "Normal NP" exhibited a highly cellularised cell mass that decreased with natural ageing and in disc degeneration...
June 21, 2017: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/28598758/management-of-fournier-s-gangrene-non-healing-wounds-by-autologous-skin-micrograft-biotechnology-a-new-technique
#13
M A Bocchiotti, P Bogetti, A Parisi, F Rivarossa, A Frenello, E A Baglioni
Fournier's gangrene is an acute bacterial infection producing necrosis of the perineum and external genitalia that generally affects elderly men. Although skin grafts and flaps are the standard procedure for reconstruction, sometimes wounds can become chronic. Rigenera Protocol is a new technique based on autologous skin micrografts that reactivates and supports wound healing. A 40-year-old male with Fournier's gangrene, due to a rectal microperforation following diarrhoea, was treated with surgical debridement, negative pressure wound therapy and subsequently coverage with skin grafts...
June 2, 2017: Journal of Wound Care
https://www.readbyqxmd.com/read/28579065/engineering-a-sprayable-and-elastic-hydrogel-adhesive-with-antimicrobial-properties-for-wound-healing
#14
Nasim Annabi, Devyesh Rana, Ehsan Shirzaei Sani, Roberto Portillo-Lara, Jessie L Gifford, Mohammad M Fares, Suzanne M Mithieux, Anthony S Weiss
Hydrogel-based bioadhesives have emerged as alternatives for sutureless wound closure, since they can mimic the composition and physicochemical properties of the extracellular matrix. However, they are often associated with poor mechanical properties, low adhesion to native tissues, and lack of antimicrobial properties. Herein, a new sprayable, elastic, and biocompatible composite hydrogel, with broad-spectrum antimicrobial activity, for the treatment of chronic wounds is reported. The composite hydrogels were engineered using two ECM-derived biopolymers, gelatin methacryloyl (GelMA) and methacryloyl-substituted recombinant human tropoelastin (MeTro)...
September 2017: Biomaterials
https://www.readbyqxmd.com/read/28561757/implications-of-extracellular-matrix-production-by-adipose-tissue-derived-stem-cells-for-development-of-wound-healing-therapies
#15
REVIEW
Kathrine Hyldig, Simone Riis, Cristian Pablo Pennisi, Vladimir Zachar, Trine Fink
The synthesis and deposition of extracellular matrix (ECM) plays an important role in the healing of acute and chronic wounds. Consequently, the use of ECM as treatment for chronic wounds has been of special interest-both in terms of inducing ECM production by resident cells and applying ex vivo produced ECM. For these purposes, using adipose tissue-derived stem cells (ASCs) could be of use. ASCs are recognized to promote wound healing of otherwise chronic wounds, possibly through the reduction of inflammation, induction of angiogenesis, and promotion of fibroblast and keratinocyte growth...
May 31, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28561086/diabetic-wound-regeneration-using-heparin-mimetic-peptide-amphiphile-gel-in-db-db-mice
#16
Berna Senturk, Burak M Demircan, Alper D Ozkan, Sehmus Tohumeken, Tuncay Delibasi, Mustafa O Guler, Ayse B Tekinay
There is an urgent need for more efficient treatment of chronic wounds in diabetic patients especially with a high risk of leg amputation. Biomaterials capable of presenting extracellular matrix-mimetic signals may assist in the recovery of diabetic wounds by creating a more conducive environment for blood vessel formation and modulating the immune system. In a previous study, we showed that glycosaminoglycan-mimetic peptide nanofibers are able to increase the rate of closure in STZ-induced diabetic rats by induction of angiogenesis...
June 27, 2017: Biomaterials Science
https://www.readbyqxmd.com/read/28537645/use-of-an-ovine-collagen-dressing-with-intact-extracellular-matrix-to-improve-wound-closure-times-and-reduce-expenditures-in-a-us-military-veteran-hospital-outpatient-wound-center
#17
Daniel T Ferreras, Sean Craig, Rebecca Malcomb
A novel, comprehensive decision-making and treatment algorithm was established within a US government-run military veteran hospital in an attempt to standardize the process of outpatient wound care and streamline costs. All patients were systematically evaluated and treated using the comprehensive algorithm over a span of nine months. After three months of adherence to the algorithm, the algorithm was modified to include ovine-based collagen extracellular matrix (CECM) dressings as a first-line conventional treatment strategy for all appropriate wounds...
May 24, 2017: Surgical Technology International
https://www.readbyqxmd.com/read/28529754/chitosan-poly-caprolactone-nanofibers-for-skin-repair
#18
Sheeny Lan Levengood, Ariane E Erickson, Fei-Chien Chang, Miqin Zhang
Dermal wounds, both acute and chronic, represent a significant clinical challenge and therefore the development of novel biomaterial-based skin substitutes to promote skin repair is essential. Nanofibers have garnered attention as materials to promote skin regeneration due to the similarities in morphology and dimensionality between nanofibers and native extracellular matrix proteins, which are critical in guiding cutaneous wound healing. Electrospun chitosan-poly(caprolactone) (CPCL) nanofiber scaffolds, which combine the important intrinsic biological properties of chitosan and the mechanical integrity and stability of PCL, were evaluated as skin tissue engineering scaffolds using a mouse cutaneous excisional skin defect model...
March 7, 2017: Journal of Materials Chemistry. B, Materials for Biology and Medicine
https://www.readbyqxmd.com/read/28520219/plasminogen-activator-inhibitor-type-1-as-a-regulator-of-fibrosis
#19
Reyhaneh Rabieian, Maryam Boshtam, Mahshid Zareei, Shirin Kouhpayeh, Aria Masoudifar, Hamed Mirzaei
Fibrosis is known as a frequent and irreversible pathological condition which is associated with organ failure. Tissue fibrosis is a central process in a variety of chronic progressive diseases such as diabetes, hypertension, and persistent inflammation. This state could contribute to chronic injury and the initiation of tissue repair. Fibrotic disorders represent abnormal wound healing with defective matrix turnover and clearance that lead to excessive accumulation of extracellular matrix components. A variety of identified growth factors, cytokines, and persistently activated myofibroblasts have critical roles in the pathogenesis of fibrosis...
May 18, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/28501566/dna-methylation-regulated-gene-expression-in-organ-fibrosis
#20
REVIEW
Xiangyu Zhang, Min Hu, Xing Lyu, Chun Li, Victor J Thannickal, Yan Y Sanders
DNA methylation is a major epigenetic mechanism to regulate gene expression. Epigenetic regulation, including DNA methylation, histone modifications and RNA interference, results in heritable changes in gene expression independent of alterations in DNA sequence. Epigenetic regulation often occurs in response to aging and environment stimuli, including exposures and diet. Studies have shown that DNA methylation is critical in the pathogenesis of fibrosis involving multiple organs sytems, contributing to significant morbidity and mortality...
May 10, 2017: Biochimica et Biophysica Acta
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