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Wound healing and oxygenation

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https://www.readbyqxmd.com/read/29772758/antioxidant-capacity-of-rigenase-%C3%A2-a-specific-aqueous-extract-of-triticum-vulgare
#1
Immacolata Antonucci, Gabriella Fiorentino, Patrizia Contursi, Massimiliano Minale, Rodolfo Riccio, Salvatore Riccio, Danila Limauro
Reactive species of oxygen (ROS), responsible for oxidative stress, accumulate in various tissues damaged by burns, decubitus ulcers, and vascular lesions. Antioxidants play an important and well-documented role in healing of chronic and acute wounds. Rigenase® , a specific extract of Triticum vulgare manufactured by Farmaceutici Damor, is employed in products used for the regeneration of tissue injuries. In this work, we show that Rigenase® exhibits a scavenging effect toward free radicals, thus pointing to its relevant antioxidant activity...
May 17, 2018: Antioxidants (Basel, Switzerland)
https://www.readbyqxmd.com/read/29765329/the-role-of-macrophages-in-acute-and-chronic-wound-healing-and-interventions-to-promote-pro-wound-healing-phenotypes
#2
REVIEW
Paulina Krzyszczyk, Rene Schloss, Andre Palmer, François Berthiaume
Macrophages play key roles in all phases of adult wound healing, which are inflammation, proliferation, and remodeling. As wounds heal, the local macrophage population transitions from predominantly pro-inflammatory (M1-like phenotypes) to anti-inflammatory (M2-like phenotypes). Non-healing chronic wounds, such as pressure, arterial, venous, and diabetic ulcers indefinitely remain in inflammation-the first stage of wound healing. Thus, local macrophages retain pro-inflammatory characteristics. This review discusses the physiology of monocytes and macrophages in acute wound healing and the different phenotypes described in the literature for both in vitro and in vivo models...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29755977/wearable-technology-for-chronic-wound-monitoring-current-dressings-advancements-and-future-prospects
#3
REVIEW
Matthew S Brown, Brandon Ashley, Ahyeon Koh
Chronic non-healing wounds challenge tissue regeneration and impair infection regulation for patients afflicted with this condition. Next generation wound care technology capable of in situ physiological surveillance which can diagnose wound parameters, treat various chronic wound symptoms, and reduce infection at the wound noninvasively with the use of a closed loop therapeutic system would provide patients with an improved standard of care and an accelerated wound repair mechanism. The indicating biomarkers specific to chronic wounds include blood pressure, temperature, oxygen, pH, lactate, glucose, interleukin-6 (IL-6), and infection status...
2018: Frontiers in Bioengineering and Biotechnology
https://www.readbyqxmd.com/read/29749547/salidroside-inhibits-the-proliferation-and-migration-of-gastric-cancer-cells-via-suppression-of-src%C3%A2-associated-signaling-pathway-activation-and-heat-shock-protein-70-expression
#4
Zhilin Qi, Tuo Tang, Lili Sheng, Yunfei Ma, Yinhua Liu, Liang Yan, Shimei Qi, Liefeng Ling, Yao Zhang
Salidroside, an active ingredient extracted from the Rhodiola rosea plant, has potential anti‑tumor effects. However, the effects of salidroside on gastric cancer cell proliferation and migration remain unclear. In the present study, the inhibitory effects of salidroside on gastric cancer cell proliferation, migration and invasion and the molecular mechanisms underlying these effects were investigated. The human gastric cancer cell line, BGC‑823, was treated with different concentrations of salidroside (200, 400 and 600 µg/ml)...
May 3, 2018: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29744458/antioxidative-study-of-cerium-oxide-nanoparticle-functionalised-pcl-gelatin-electrospun-fibers-for-wound-healing-application
#5
Hilal Ahmad Rather, Ria Thakore, Ragini Singh, Dhwani Jhala, Sanjay Singh, Rajesh Vasita
Skin wound healing involves a coordinated cellular response to achieve complete reepithelialisation. Elevated levels of reactive oxygen species (ROS) in the wound environment often pose a hindrance in wound healing resulting in impaired wound healing process. Cerium oxide nanoparticles (CeNPs) have the ability to protect the cells from oxidative damage by actively scavenging the ROS. Furthermore, matrices like nanofibers have also been explored for enhancing wound healing. In the current study CeNP functionalised polycaprolactone (PCL)-gelatin nanofiber (PGNPNF) mesh was fabricated by electrospinning and evaluated for its antioxidative potential...
June 2018: Bioactive Materials
https://www.readbyqxmd.com/read/29742498/fg-4592-accelerates-cutaneous-wound-healing-by-epidermal-stem-cell-activation-via-hif-1%C3%AE-stabilization
#6
Di Tang, Junhui Zhang, Tiantian Yan, Jingyu Wei, Xupin Jiang, Dongxia Zhang, Qiong Zhang, Jiezhi Jia, Yuesheng Huang
BACKGROUND/AIMS: Regional hypoxia promptly develops after trauma because of microvascular injury and increased oxygen consumption. This acute hypoxia plays a positive role in early skin wound healing. One of the mechanisms underlying the beneficial effects of acute hypoxia on wound healing may be increased hypoxia-inducible factor-1 (HIF-1α) expression. HIF-1α may affect the wound-healing process through many aspects, including angiogenesis, metabolism, and extra-cellular matrix synthesis and remodelling...
May 5, 2018: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29737151/oxygen-releasing-antioxidant-cryogel-scaffolds-with-sustained-oxygen-delivery-for-tissue-engineering-applications
#7
Parvaiz Ahmad Shiekh, Anamika Singh, Ashok Kumar
With the advancement in biomaterial sciences, tissue engineered scaffolds are developing as a promising strategy for the regeneration of damaged tissues. However, only a few of these scaffolds have been translated into clinical applications. One of the primary drawbacks of the existing scaffolds is the lack of adequate oxygen supply within the scaffolds. Oxygen producing biomaterials have been developed as an alternate strategy but are faced with two major concerns. One is controlling the rate of oxygen generation, and the other is the production of reactive oxygen species...
May 8, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29730283/photodynamic-therapy-as-an-alternative-to-antibiotic-therapy-for-the-treatment-of-infected-leg-ulcers
#8
REVIEW
Aleksandra Kawczyk-Krupka, Barbara Pucelik, Anna Międzybrodzka, Aleksander Sieroń, Janusz M Dąbrowski
Infected leg ulcers are painful, debilitating and immensely reducing patient's quality of life, therefore they are becoming a more and more significant clinical and socioeconomic problems nowadays. Increasing resistance to antibiotics, drugs and therapies is one of the most urgent challenge in medicine worldwide and requires searching for a new, innovative and more efficient medical strategies. One of the opportunities for the cure of leg ulcers is photodynamic inactivation (PDI), that has been widely used in the treatment of various bacterial, fungal and viral infections...
May 3, 2018: Photodiagnosis and Photodynamic Therapy
https://www.readbyqxmd.com/read/29727297/hyperspectral-imaging-innovative-diagnostics-to-visualize-hemodynamic-effects-of-cold-plasma-in-wound-therapy
#9
Georg Daeschlein, Rico Rutkowski, Stine Lutze, Sebastian von Podewils, Claudia Sicher, Thomas Wild, Hans-Robert Metelmann, Thomas von Woedkte, Michael Jünger
An important clinical potential of cold atmospheric plasma (CAP) lies in tumor and wound treatment, whereby the last-mentioned is well-referenced already. However, the underlying mechanisms of improved wound healing have not been sufficiently clarified yet, in particular the influence of CAP on microcirculation. Hyperspectral imaging (HSI) enables the visualization of microcirculation of large tissue areas, thus this technique seems to be a candidate to examine CAP effects on perfusion and oxygen saturation in wounds...
May 4, 2018: Biomedizinische Technik. Biomedical Engineering
https://www.readbyqxmd.com/read/29723596/combination-of-urea-crosslinked-hyaluronic-acid-and-sodium-ascorbyl-phosphate-for-the-treatment-of-inflammatory-lung-diseases-an-in-vitro-study
#10
Arianna Fallacara, Laura Busato, Michele Pozzoli, Maliheh Ghadiri, Hui Xin Ong, Paul M Young, Stefano Manfredini, Daniela Traini
This in vitro study evaluated, for the first time, the safety and the biological activity of a novel urea-crosslinked hyaluronic acid component and sodium ascorbyl phosphate (HA-CL - SAP), singularly and/or in combination, intended for the treatment of inflammatory lung diseases. The aim was to understand if the combination HA-CL - SAP had an enhanced activity with respect to the combination native hyaluronic acid (HA) - SAP and the single SAP, HA and HA-CL components. Sample solutions displayed pH, osmolality and viscosity values suitable for lung delivery, and showed to be not toxic on epithelial Calu-3 cells at the concentration used in this study...
April 30, 2018: European Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/29722526/hydrogen-peroxide-releasing-hydrogels-for-enhanced-endothelial-cell-activities-and-neovascularization
#11
Yunki Lee, Joo Young Son, Jeon Il Kang, Kyung Min Park, Ki Dong Park
Reactive oxygen species (ROS) have been implicated as a critical modulator for various therapeutic applications such as treatment of vascular disorders, wound healing, and cancer treatment. Specifically, growing evidence has recently demonstrated that transient or low levels of hydrogen peroxide (H2 O2 ) facilitate tissue regeneration and wound repair through acute oxidative stress that can evaluate intracellular ROS levels in cells or tissues. Herein, we report a gelatin-based H2O2-releasing hydrogel formed by dual enzyme-mediated reaction using horseradish peroxidase (HRP) and glucose oxidase (GOx)...
May 3, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29705809/high-glucose-induced-reactive-oxygen-species-stimulates-human-mesenchymal-stem-cell-migration-through-snail-and-ezh2-dependent-e-cadherin-repression
#12
Ji Young Oh, Gee Euhn Choi, Hyun Jik Lee, Young Hyun Jung, So Hee Ko, Chang Woo Chae, Jun Sung Kim, Seo Yihl Kim, Jae Ryong Lim, Chang-Kyu Lee, Ho Jae Han
BACKGROUND/AIMS: Glucose plays an important role in stem cell fate determination and behaviors. However, it is still not known how glucose contributes to the precise molecular mechanisms responsible for stem cell migration. Thus, we investigate the effect of glucose on the regulation of the human umbilical cord blood-derived mesenchymal stem cell (hUCB-MSC) migration, and analyze the mechanism accompanied by this effect. METHODS: Western blot analysis, wound healing migration assays, immunoprecipitation, and chromatin immunoprecipitation assay were performed to investigate the effect of high glucose on hUCB-MSC migration...
April 25, 2018: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29679687/a-novel-technique-indocyanine-green-angiography-to-prognosticate-healing-of-foot-ulcer-in-critical-limb-ischemia
#13
Hiten M Patel, Shahzad S Bulsara, Shubhabrata Banerjee, Tapish Sahu, Virender K Sheorain, Tarun Grover, Rajiv Parakh
BACKGROUND: To predict wound healing in patients with critical limb ischemia(CLI) is ongoing issue. Currents methods like ankle-brachial index (ABI), color doppler and transcutaneous oxygen pressure (TCPO2 ), CT angiography are lacking in demonstrating regional perfusion. Indocyanine green angiography (ICGA) has the potential to provide regional perfusion information lacking in other methods. To demonstrate successes of revascularization procedure in CLI patients based on ICGA data this study was conducted...
April 18, 2018: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/29675337/highly-diluted-acetylcholine-promotes-wound-repair-in-an-in-vivo-model
#14
Francesca Uberti, Vera Morsanuto, Sabrina Ghirlanda, Sara Ruga, Nausicaa Clemente, Cristina Boieri, Renzo Boldorini, Claudio Molinari
Objective: Wound healing is a dynamic, interactive, and complex process that involves a series of events, including inflammation, migration, proliferation, granulation tissue formation, and matrix remodeling. Despite the high frequency of serious slow-healing wounds, there is still no adequate therapy. The aim of this study is to evaluate a new highly diluted acetylcholine (Ach) formulation obtained through a sequential kinetic activation (SKA) method applied to a wound healing in vivo model to verify the hypothesis that a low dose of Ach could be a more physiological stimulus for healing, by stimulating muscarinic and nicotinic receptors and their related intracellular pathways...
April 1, 2018: Advances in Wound Care
https://www.readbyqxmd.com/read/29672850/ursolic-acid-ameliorates-ccl4-induced-liver-fibrosis-through-the-noxs-ros-pathway
#15
Dakai Gan, Wang Zhang, Chenkai Huang, Jiang Chen, Wenhua He, Anjiang Wang, Bimin Li, Xuan Zhu
Liver fibrosis is a reversible wound-healing response that occurs after liver injury. NADPH oxidases (NOXs) and reactive oxygen species (ROS) which are expressed in hepatocytes (HCs), hepatic stellate cells (HSCs), and Kupffer cells (KCs) play an important role in the development of hepatic fibrosis. In in vitro studies, we had shown that ursolic acid (UA) could reverse liver fibrosis by inhibiting the activation of NOX-mediated fibrotic signaling networks in HSCs. In this study, we verified that UA could alleviate CCl4-induced liver fibrosis by reducing the expression of NOXs/ROS in HCs, HSCs, KCs...
April 19, 2018: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/29672303/bevacizumab-improves-achilles-tendon-repair-in-a-rat-model
#16
Herbert Tempfer, Alexandra Kaser-Eichberger, Christine Lehner, Renate Gehwolf, Stefanie Korntner, Nadja Kunkel, Andrea Wagner, Moritz Gruetz, Ludwig M Heindl, Falk Schroedl, Andreas Traweger
BACKGROUND/AIMS: Effective wound-healing generally requires efficient re-vascularization after injury, ensuring sufficient supply with oxygen, nutrients, and various cell populations. While this applies to most tissues, tendons are mostly avascular in nature and harbor relatively few cells, probably contributing to their poor regenerative capacity. Considering the minimal vascularization of healthy tendons, we hypothesize that controlling angiogenesis in early tendon healing is beneficial for repair tissue quality and function...
April 16, 2018: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29671368/the-efficacy-of-topical-human-amniotic-membrane-mesenchymal-stem-cell-conditioned-medium-hammsc-cm-and-a-mixture-of-topical-hammsc-cm-vitamin-c-and-hammsc-cm-vitamin-e-on-chronic-plantar-ulcers-in-leprosy-a-randomized-control-trial
#17
Crs Prakoeswa, F R Natallya, D Harnindya, A Thohiroh, R N Oktaviyanti, K D Pratiwi, M A Rubianti, B Yogatri, P I Primasari, N Herwanto, M D Alinda, B H Kusumaputra, L Astari, M Y Listiawan, I Agusni, F A Rantam
BACKGROUND: Healing of chronic plantar ulcers in leprosy (CPUL) typically takes a long time due to impaired neurological function, thereby reducing the levels of growth factors and cytokines. Cytokines can be found in metabolite products from amniotic membrane stem cells. Chronic ulcers are frequently characterized by high levels of reactive oxygen species. Vitamin E (α-tocopherol) is widely used in skin lesions, owing to its antioxidant and anti-inflammatory properties. Vitamin C also has antioxidant, anti-inflammatory, and collagen synthesis properties useful in wound healing...
April 19, 2018: Journal of Dermatological Treatment
https://www.readbyqxmd.com/read/29665018/differential-response-of-human-dermal-fibroblast-subpopulations-to-visible-and-near-infrared-light-potential-of-photobiomodulation-for-addressing-cutaneous-conditions
#18
Charles Mignon, Natallia E Uzunbajakava, Irene Castellano-Pellicena, Natalia V Botchkareva, Desmond J Tobin
BACKGROUND OBJECTIVES: The past decade has witnessed a rapid expansion of photobiomodulation (PBM), demonstrating encouraging results for the treatment of cutaneous disorders. Confidence in this approach, however, is impaired not only by a lack of understanding of the light-triggered molecular cascades but also by the significant inconsistency in published experimental outcomes, design of the studies and applied optical parameters. This study aimed at characterizing the response of human dermal fibroblast subpopulations to visible and near-infrared (NIR) light in an attempt to identify the optical treatment parameters with high potential to address deficits in aging skin and non-healing chronic wounds...
April 17, 2018: Lasers in Surgery and Medicine
https://www.readbyqxmd.com/read/29658630/lumbar-sympathectomy-versus-prostanoids-for-critical-limb-ischaemia-due-to-non-reconstructable-peripheral-arterial-disease
#19
REVIEW
Indrani Sen, Sunil Agarwal, Prathap Tharyan, Rachel Forster
BACKGROUND: Peripheral arterial disease (PAD) is a common circulatory problem that can lead to reduced blood flow to the limbs, which may result in critical limb ischaemia (CLI), a painful manifestation that occurs when a person is at rest. The mainstay of treatment for CLI is surgical or endovascular repair. However, when these means of treatment are not suitable, due to anatomical reasons or comorbidities, treatment for pain is limited. Lumbar sympathectomy and prostanoids have both been shown to reduce pain from CLI in people who suffer from non-reconstructable PAD, but there is currently insufficient evidence to determine if one treatment is superior...
April 16, 2018: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/29657902/inhibitory-effects-of-angiotensin-ii-receptor-blockade-on-human-tenon-fibroblast-migration-and-reactive-oxygen-species-production-in-cell-culture
#20
Duri Kim, Ushasree Pattamatta, Elizabeth Kelly, Paul R Healey, Nicole Carnt, Hans Zoellner, Andrew J R White
Purpose: We investigate the effect of angiotensin receptor blockade on the migration of human Tenon fibroblasts (HTF), using irbesartan, an angiotensin II receptor type 1 (AT1R) blocker (ARB) as a potential antifibrotic agent in glaucoma filtration surgery. Methods: Confluent HTF cultures were scratched with a 1 mL pipette tip and treated with either irbesartan (10, 50, and 100 μg/mL) or angiotensin II (2 μg/mL). The extent of HTF migration up to 30 hours, and cell number and morphology at 72 hours was evaluated...
April 2018: Translational Vision Science & Technology
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