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Mechanical wound closure

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https://www.readbyqxmd.com/read/29776969/identifying-genetic-players-in-cell-sheet-morphogenesis-using-a-drosophila-deficiency-screen-for-genes-on-chromosome-2r-involved-in-dorsal-closure
#1
Richard D Mortensen, Regan P Moore, Stephanie M Fogerson, Hellen Y Chiou, Chimdindu V Obinero, Neel K Prabhu, Angela H Wei, Janice M Crawford, Daniel P Kiehart
Cell sheet morphogenesis characterizes key developmental transitions and homeostasis, in vertebrates and throughout phylogeny, including gastrulation, neural tube formation and wound healing. Dorsal closure, a process during Drosophila embryogenesis, has emerged as a model for cell sheet morphogenesis. ∼140 genes are currently known to affect dorsal closure and new genes are identified each year. Many of these genes were identified in screens that resulted in arrested development. Dorsal closure is remarkably robust and many questions regarding the molecular mechanisms involved in this complex biological process remain...
May 18, 2018: G3: Genes—Genomes—Genetics
https://www.readbyqxmd.com/read/29775632/controlled-delivery-of-a-focal-adhesion-kinase-inhibitor-results-in-accelerated-wound-closure-with-decreased-scar-formation
#2
Kun Ma, Sun Hyung Kwon, Jagannath Padmanabhan, Dominik Duscher, Artem A Trotsyuk, Yixiao Dong, Mohammed Inayathullah, Jayakumar Rajadas, Geoffrey C Gurtner
Formation of scars following wounding or trauma represents a significant healthcare burden costing the economy billions of dollars every year. Activation of focal adhesion kinase (FAK) has been shown to play a pivotal role in transducing mechanical signals to elicit fibrotic responses and scar formation during wound repair. We have previously shown that inhibition of FAK using local injections of a small molecule FAK inhibitor (FAKI) can attenuate scar development in a hypertrophic scar model. Clinical translation of FAKI therapy has been challenging, however, due to the lack of an effective drug delivery system for extensive burn injuries, blast injuries, and large excisional injuries...
May 15, 2018: Journal of Investigative Dermatology
https://www.readbyqxmd.com/read/29749798/first-extensive-microscopic-study-of-butternut-defense-mechanisms-following-inoculation-with-the-canker-pathogen-ophiognomonia-clavigignenti-juglandacearum-reveals-compartmentalization-of-tissue-damage
#3
Danny Rioux, Martine Blais, Nicholas Nadeau-Thibodeau, Marie Lagacé, Pierre DesRochers, Krystyna Klimaszewska, Louis Bernier
Ophiognomonia clavigignenti-juglandacearum (Oc-j) endangers the survival of butternut (Juglans cinerea) throughout its native range. While screening for disease resistance, we found that artificial inoculations of 48 butternut seedlings with Oc-j induced the expression of external symptoms, but only after a period of dormancy. Before dormancy, compartmentalized tissues such as necrophylactic periderms (NPs) and xylem reaction zones (RZs) contributed to limiting pathogen invasion. Phenols were regularly detected in RZs, often in continuity with NPs during wound closure, and confocal microscopy revealed their presence in parenchyma cells, vessel plugs and cell walls...
May 11, 2018: Phytopathology
https://www.readbyqxmd.com/read/29748961/growth-hormone-releasing-hormone-receptor-antagonists-modify-molecular-machinery-in-the-progression-of-prostate-cancer
#4
Laura Muñoz-Moreno, Andrew V Schally, Juan C Prieto, M José Carmena, Ana M Bajo
BACKGROUND: Therapeutic strategies should be designed to transform aggressive prostate cancer phenotypes to a chronic situation. To evaluate the effects of the new growth hormone-releasing hormone receptor (GHRH-R) antagonists: MIA-602, MIA-606, and MIA-690 on processes associated with cancer progression as cell proliferation, adhesion, migration, and angiogenesis. METHODS: We used three human prostate cell lines (RWPE-1, LNCaP, and PC3). We analyzed several molecules such as E-cadherin, β-catenin, Bcl2, Bax, p53, MMP2, MMP9, PCNA, and VEGF and signaling mechanisms that are involved on effects exerted by GHRH-R antagonists...
May 10, 2018: Prostate
https://www.readbyqxmd.com/read/29734114/the-early-signaling-pathway-of-live-yeast-cell-derivative-in-thp-1-monocytes
#5
Eric I Gruenstein, Donna J Schlemm, Mridula Bethi, Stephen J Keller
Live yeast cell derivative (LYCD) is a medicinal yeast extract that has been used in the treatment of burns, wounds and hemorrhoids for over 70 years. It has been shown to enhance the closure of skin wounds in diabetic mice by increasing inflammation, angiogenesis, formation of granulation tissue and epithelial migration. An active fraction of LYCD has been identified as a mixture of peptides ranging in size from 5 kDA to 17 kDA. Despite its widespread use over many years, understanding of the mechanism by which LYCD acts to effect tissue repair responses is very limited...
April 22, 2018: Cell Calcium
https://www.readbyqxmd.com/read/29721663/combined-vegf-pdgf-inhibition-using-axitinib-induces-%C3%AE-sma-expression-and-a-pro-fibrotic-phenotype-in-human-pericytes
#6
Jakob Siedlecki, Ben Asani, Christian Wertheimer, Anna Hillenmayer, Andreas Ohlmann, Claudia Priglinger, Siegfried Priglinger, Armin Wolf, Kirsten Eibl-Lindner
PURPOSE: Large trials on anti-VEGF/PDGF (vascular endothelial/platelet-derived growth factor) combination therapy have been established to improve management of neovascular activity in age-related macular degeneration. Targeting pericytes, PDGF is thought to induce vessel regression and reduce fibrovascular scarring. The fate of pericytes exposed to anti-VEGF/PDGF combination therapy is not clear. Therefore, this study was designed to study the influence of anti-VEGF/PDGF on pericyte phenotype and cellular behavior...
May 2, 2018: Graefe's Archive for Clinical and Experimental Ophthalmology
https://www.readbyqxmd.com/read/29721324/the-diversity-of-myeloid-immune-cells-shaping-wound-repair-and-fibrosis-in-the-lung
#7
REVIEW
Laura Florez-Sampedro, Shanshan Song, Barbro N Melgert
In healthy circumstances the immune system coordinates tissue repair responses in a tight balance that entails efficient inflammation for removal of potential threats, proper wound closure, and regeneration to regain tissue function. Pathological conditions, continuous exposure to noxious agents, and even ageing can dysregulate immune responses after injury. This dysregulation can lead to a chronic repair mechanism known as fibrosis. Alterations in wound healing can occur in many organs, but our focus lies with the lung as it requires highly regulated immune and repair responses with its continuous exposure to airborne threats...
March 2018: Regeneration
https://www.readbyqxmd.com/read/29718762/in-wound-repair-vimentin-mediates-the-transition-of-mesenchymal-leader-cells-to-a-myofibroblast-phenotype
#8
J L Walker, B M Bleaken, A R Romisher, A A Alnwibit, A S Menko
Following injury, mesenchymal repair cells are activated to function as leader cells that modulate wound healing. These cells have the potential to differentiate to myofibroblasts, resulting in fibrosis and scarring. The signals underlying these differing pathways are complex and incompletely understood. The ex vivo mock cataract surgery cultures are an attractive model with which to address this question. With this model we study, concurrently, the mechanisms that control mesenchymal leader cell function in injury repair within their native microenvironment, and the signals that induce this same cell population to acquire a myofibroblast phenotype when these cells encounter the environment of the adjacent tissue culture platform...
May 2, 2018: Molecular Biology of the Cell
https://www.readbyqxmd.com/read/29705505/development-of-biosynthesized-silver-nanoparticles-based-formulation-for-treating-wounds-during-nursing-care-in-hospitals
#9
Cui-Ping Gong, Shou-Cun Li, Rong-Ye Wang
Silver nanoparticles (AgNPs) have been emerged as significant wound healing agents because of their improved mechanical properties. However, the green synthesized silver nanoparticleshave reported significant wound healing action in Albino rats which was validated by the measurement of wound closure rate. Silver nanoparticles were efficiently synthesized using Euphorbia milii leaf extract. The UV-visible spectra recorded the effect of the reaction time on AgNPs synthesis and was indentified that the peak became shaper with an increase in time, which corresponds to increase in the number of nanoparticles formed from the reduction of silver ions present in the aqueous solution...
April 18, 2018: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/29689557/microrna-125b-affects-vascular-smooth-muscle-cell-function-by-targeting-serum-response-factor
#10
Zhibo Chen, Mian Wang, Kai Huang, Qiong He, Honghao Li, Guangqi Chang
BACKGROUND/AIMS: Increasing evidence links microRNAs to the pathogenesis of peripheral vascular disease. We recently found microRNA-125b (miR-125b) to be one of the most significantly down‑regulated microRNAs in human arteries with arteriosclerosis obliterans (ASO) of the lower extremities. However, its function in the process of ASO remains unclear. This study aimed to investigate the expression, regulatory mechanisms, and functions of miR-125b in the process of ASO. METHODS: Using the tissue explants adherent method, vascular smooth muscle cells (VSMCs) were prepared for this study...
April 19, 2018: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29684627/bioadhesives-for-internal-medical-applications-a-review
#11
REVIEW
Wenzhen Zhu, Yon Jin Chuah, Dong-An Wang
Bioadhesives such as tissue adhesives, hemostatic agents, and tissue sealants have gained increasing popularity in different areas of clinical operations during the last three decades. Bioadhesives can be categorized into internal and external ones according to their application conditions. External bioadhesives are generally applied in topical medications such as wound closure and epidermal grafting. Internal bioadhesives are mainly used in intracorporal conditions with direct contact to internal environment including tissues, organs and body fluids, such as chronic organ leak repair and bleeding complication reduction...
April 20, 2018: Acta Biomaterialia
https://www.readbyqxmd.com/read/29676583/reticulocalbin-3-deficiency-in-alveolar-epithelium-exacerbated-bleomycin-induced-pulmonary-fibrosis
#12
Jiawei Jin, Xiaoqian Shi, Yongchao Li, Qianyu Zhang, Yu Guo, Chaokun Li, Pingping Tan, Qiuhong Fang, Yingmin Ma, Runlin Z Ma
Reticulocalbin 3 (Rcn3) is an endoplasmic reticulum (ER) lumen protein localized to the secretory pathway. We have reported that Rcn3 plays critical role for alveolar epithelial cell type II (AECII) maturation during perinatal lung development, but its biological role in the adult lung is largely unknown. Herein, we found marked induction of Rcn3 expression in alveolar epithelium during bleomycin-induced pulmonary fibrosis, which is most obvious in AECIIs. To further examine Rcn3 in pulmonary injury-remodeling, we generated transgenic mice to selectively delete Rcn3 in AECIIs in adulthood...
April 20, 2018: American Journal of Respiratory Cell and Molecular Biology
https://www.readbyqxmd.com/read/29667150/topical-application-of-omega-3-omega-6-and-omega-9-rich-oil-emulsions-for-cutaneous-wound-healing-in-rats
#13
Wan Maznah Wan Ishak, Haliza Katas, Ng Pei Yuen, Maizaton Atmadini Abdullah, Mohd Hanif Zulfakar
Wound healing is a physiological event that generates reconstitution and restoration of granulation tissue that ends with scar formation. As omega fatty acids are part of membrane phospholipids and participate in the inflammatory response, we investigated the effects of omega-3, omega-6, and omega-9 fatty acids in the form of oils on wound healing. Linseed (LO), evening primrose (EPO), and olive oils (OO) rich in omega-3, omega-6, and omega-9 fatty acids were formulated into emulsions and were topically applied on rats with excision wounds...
April 17, 2018: Drug Delivery and Translational Research
https://www.readbyqxmd.com/read/29656516/mir-21-ameliorates-aged-associated-skin-wound-healing-defects-in-mice
#14
Shuang Long, Na Zhao, Lan Ge, Guojian Wang, Xinze Ran, Junping Wang, Yongping Su, Tao Wang
BACKGROUND: The cellular and molecular mechanisms for aged-associated delay of cutaneous wound healing are still not well understood. Our previous results show that miR-21 plays key roles during skin wound healing. We presumed that dysregulation of miR-21 may involve in aged-associated defects in wound healing and miR-21 may be one potential therapeutic target to ameliorate wound defects in elderly subjects. METHODS: Circular full thickness excisional wounds were made on the dorsal skin of young (2-month-old) and aged (12-month-old) female mice...
April 15, 2018: Journal of Gene Medicine
https://www.readbyqxmd.com/read/29656072/enhanced-wound-healing-of-tissue-engineered-human-corneas-through-altered-phosphorylation-of-the-creb-and-akt-signal-transduction-pathways
#15
Camille Couture, Pascale Desjardins, Karine Zaniolo, Lucie Germain, Sylvain L Guérin
The cornea is a transparent organ, highly specialized and unique that is continually subjected to abrasive forces and occasional mechanical or chemical trauma because of its anatomical localization. Upon injury, the extracellular matrix (ECM) rapidly changes to promote wound healing through integrin-dependent activation of specific signal transduction mediators whose contribution is to favor faster closure of the wound by altering the adhesive and migratory properties of the cells surrounding the damaged area...
April 12, 2018: Acta Biomaterialia
https://www.readbyqxmd.com/read/29644146/xanthine-oxidoreductase-a-novel-therapeutic-target-for-the-treatment-of-chronic-wounds
#16
REVIEW
Melissa L Fernandez, Dario Stupar, Tristan Croll, David Leavesley, Zee Upton
Significance: Chronic wounds are a major burden to patients and to healthcare systems worldwide. These wounds are difficult to heal and treatment is often lengthy and expensive. This has led to research efforts focussed on the wound environment attempting to understand the underlying pathological mechanisms of impaired wound healing. While some of this research has translated to advancements in wound therapies and implementation of new treatment options, chronic wounds remain a significant challenge to treat...
March 1, 2018: Advances in Wound Care
https://www.readbyqxmd.com/read/29621477/stromal-vascular-fraction-promotes-fibroblast-migration-and-cellular-viability-in-a-hyperglycemic-microenvironment-through-up-regulation-of-wound-healing-cytokines
#17
Shaun S Tan, Xin Yi Yeo, Zhen Chang Liang, Sunil K Sethi, Samuel S W Tay
Diabetic wounds have impaired healing and a propensity for further morbidity, which may result in amputations. Stromal vascular fraction (SVF) is an autologous source of heterogeneous cell population obtained from adipose tissue, which is rich in stem cells and presents little immunogenicity to the host. In this study, we hypothesized that murine fibroblasts subjected to hyperglycemic conditions co-treated with SVF exhibit greater functional activity through the colorimetric MTT assay and a cell-monolayer in-vitro scratch assay...
April 2, 2018: Experimental and Molecular Pathology
https://www.readbyqxmd.com/read/29614431/3d-cell-printing-of-in-vitro-stabilized-skin-model-and-in-vivo-pre-vascularized-skin-patch-using-tissue-specific-extracellular-matrix-bioink-a-step-towards-advanced-skin-tissue-engineering
#18
Byoung Soo Kim, Yang Woo Kwon, Jeong-Sik Kong, Gyu Tae Park, Ge Gao, Wonil Han, Moon-Bum Kim, Hyungseok Lee, Jae Ho Kim, Dong-Woo Cho
3D cell-printing technique has been under spotlight as an appealing biofabrication platform due to its ability to precisely pattern living cells in pre-defined spatial locations. In skin tissue engineering, a major remaining challenge is to seek for a suitable source of bioink capable of supporting and stimulating printed cells for tissue development. However, current bioinks for skin printing rely on homogeneous biomaterials, which has several shortcomings such as insufficient mechanical properties and recapitulation of microenvironment...
March 23, 2018: Biomaterials
https://www.readbyqxmd.com/read/29610452/baicalin-inhibits-human-cervical-cancer-cells-by-suppressing-protein-kinase-c-signal-transducer-and-activator-of-transcription-pkc-stat3-signaling-pathway
#19
Qianqian Wang, Haiou Xu, Xiaofeng Zhao
BACKGROUND Like other human cancers, the malignancy of cervical cancer is also characterized by abilities of proliferation, migration, and invasion. Protein kinase C-zeta (PKCζ) has been highly correlated with several human cancers. Baicalin was proven to regulate PKC. This study aimed to investigate the anti-cancer effect and involved molecular mechanisms of baicalin on human cervical cancer. MATERIAL AND METHODS Baicalin at various concentrations was used to treat 2 human cervical cancer cell lines HeLa and SiHa...
April 3, 2018: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/29608162/a-novel-in-vitro-wound-healing-assay-to-evaluate-cell-migration
#20
Floriana Cappiello, Bruno Casciaro, Maria Luisa Mangoni
The aim of this work is to show a novel method to evaluate the ability of some immunomodulatory molecules, such as antimicrobial peptides (AMPs), to stimulate cell migration. Importantly, cell migration is a rate-limiting event during the wound-healing process to re-establish the integrity and normal function of tissue layers after injury. The advantage of this method over the classical assay, which is based on a manually made scratch in a cell monolayer, is the usage of special silicone culture inserts providing two compartments to create a cell-free pseudo-wound field with a well-defined width (500 μm)...
March 17, 2018: Journal of Visualized Experiments: JoVE
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