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Wound healing and oxygenation

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https://www.readbyqxmd.com/read/29157036/epigallocatechin-3-o-gallate-alleviates-the-malignant-phenotype-in-a-431-epidermoid-and-sk-br-3-breast-cancer-cell-lines
#1
Alexandru Filippi, Tiphanie Picot, Carmen Mariana Aanei, Péter Nagy, János Szöllősi, Lydia Campos, Constanţa Ganea, Maria-Magdalena Mocanu
In this study, we evaluated the effects of epigallocatechin-3-O-gallate (EGCG) in two cancer cell lines, A-431 overexpressing ErbB1 and SK-BR-3, overexpressing ErbB2. EGCG treatment showed dose-dependent collapse of mitochondrial membrane potential (Δψm), increase in reactive oxygen species (ROS) production, changes in nuclear morphology and reduced viability. Flow cytometry data indicated that EGCG partially decreases the phosphorylation of several proteins involved in cell proliferation and survival: pErbB1(Y1173, Y1068), pAkt(S473) and pERK(Y204)...
November 21, 2017: International Journal of Food Sciences and Nutrition
https://www.readbyqxmd.com/read/29156153/hyperbaric-oxygen-therapy-is-not-associated-with-oxidative-stress-assessed-using-plasma-f2-isoprostanes-and-isofurans
#2
Tomas Corcoran, Sonya Ting, Emilie Mas, Michael Phillips, Edmond O'Loughlin, Anne Barden, Trevor A Mori
BACKGROUND AND AIMS: Hyperbaric oxygen (HBO) therapy is increasingly used in medical practice as a means of enhancing the formation of collagen matrix and angiogenesis, thus promoting healing in wounds and necrotic tissue. However, there are concerns that oxygen can also associate with increased production of oxygen free radicals and oxidative stress. F2-Isoprostanes (F2-IsoPs) formed by non-enzymatic oxidation of arachidonic acid (AA) are reliable measures for assessing oxidative stress in vivo...
December 2017: Prostaglandins, Leukotrienes, and Essential Fatty Acids
https://www.readbyqxmd.com/read/29152067/propoxur-enhances-mmp-2-expression-and-the-corresponding-invasion-of-human-breast-cancer-cells-via-the-erk-nrf2-signaling-pathway
#3
Yunxiang Shi, Daizhi An, Yiping Liu, Qiong Feng, Xu Fang, Guilan Pan, Qiang Wang
Propoxur is considered a prime etiological suspect of increasing tumor incidence, but the role is still undefined. In this study, two human breast cancer cells lines, MCF-7 and MDA-MB-231 cells, were used as cell models. Cells were respectively treated with 0, 0.01, 1, or 100 μM propoxur. PD98059, a MEK inhibitor, was administered to block the ERK/MAPK pathway. Migration and reactive oxygen species were measured by wound healing and Transwell assays, and flow cytometry. Protein expression and subcellular location were detected by western blotting and immunofluorescence staining, respectively...
October 20, 2017: Oncotarget
https://www.readbyqxmd.com/read/29151322/intralesional-epidermal-growth-factor-therapy-fordiabetic-foot-ulcers-an-evaluation-of-15-cases
#4
Meltem Işıkgöz Taşbakan, Ilgın Yıldırım Şimşir, Sinan Mermer, Serhat Uysal, Murat Öztürk, Şevki Çetinkalp
Background/aim: Intralesional recombinant epidermal growth factor (EGF) is a new treatment approach for diabetic foot ulcer, approved in 2006. EGF therapy is given as an adjunct to the standard treatment regimen of antibiotics, surgery, and hyperbaric oxygen. EGF accelerates the healing of diabetic foot ulcers and reduces healing time. This single-center study was conducted to evaluate the outcomes of intralesional EGF therapy in patients with diabetic foot ulcers.Materials and methods: We present the data of the follow-up patients treated in our clinics...
November 13, 2017: Turkish Journal of Medical Sciences
https://www.readbyqxmd.com/read/29131751/a-diabetic-foot-ulcer-treated-with-hydrogel-and-hyperbaric-oxygen-therapy-a-case-study
#5
P Aguiar, C Amaral, A Rodrigues, A H de Souza
This study reports on the case of an elderly patient, with diabetes, and a bullous wound on the left big toe that led to an amputation of the first and second left toes. The amputation was because of deep injury as it was not able to heal with a conventional treatment. After completing the normal treatment and the removal of a bacterial infection in the lesion, the patient underwent a treatment that was based on a hydrogel gel (0.9% saline solution) and hyperbaric oxygen therapy (HBOT). After 60 sessions of the therapy, almost complete closure of the wound was observed...
November 2, 2017: Journal of Wound Care
https://www.readbyqxmd.com/read/29131746/topical-oxygen-therapy-promotes-the-healing-of-chronic-diabetic-foot-ulcers-a-pilot-study
#6
P D Hayes, N Alzuhir, G Curran, I M Loftus
OBJECTIVE: Interventions that can heal or reduce diabetic foot ulcer (DFU) size may reduce the incidence of infection and amputation, and reduce associated social and economic costs. Many chronic wounds exhibit a degree of hypoxia and this leads to a reduction in healing processes including cell division and differentiation, angiogenesis, infection prevention, and collagen production. The aim of this pilot study was to assess the effects of a device supplying continuous oxygen ambulatory therapy on healing in chronic DFUs...
November 2, 2017: Journal of Wound Care
https://www.readbyqxmd.com/read/29130595/naphthoquinones-a-continuing-source-for-discovery-of-therapeutic-antineoplastic-agents
#7
REVIEW
Han-Yue Qiu, Peng-Fei Wang, Hong-Yan Lin, Cheng-Yi Tang, Hai-Liang Zhu, Yong-Hua Yang
Naturally occurring naphthoquinones, usually in forms of botanical extracts, have been implicated with human life since ancient time, far earlier than their isolation and identification in modern era. The long use history of naphthoquinones has witnessed their functional shift from the original purposes as dyes and ornaments towards medicinal benefits. Hitherto, numerous studies have been carried out to elucidate the pharmacological profile of both natural and artificial naphthoquinones. A number of entities have been identified with promising therapeutic potential...
November 11, 2017: Chemical Biology & Drug Design
https://www.readbyqxmd.com/read/29117227/kojic-acid-mediated-damage-responses-induce-mycelial-regeneration-in-the-basidiomycete-hypsizygus-marmoreus
#8
Jinjing Zhang, Hui Chen, Mingjie Chen, Hong Wang, Qian Wang, Xiaoxia Song, Haibo Hao, Zhiyong Feng
Mechanical damage can induce fruiting body production in fungi. In this study, the antioxidant kojic acid (KA) was found to enhance injured mycelial regeneration and increase fruiting body production in Hypsizygus marmoreus. KA reduced the level of reactive oxygen species (ROS), which are harmful to mycelia when excessively generated by mechanical damage. Moreover, KA increased catalase and superoxide dismutase activities and glutathione and ascorbic acid contents by up-regulating antioxidant gene expression...
2017: PloS One
https://www.readbyqxmd.com/read/29101802/corin-protects-h2o2-induced-apoptosis-through-pi3k-akt-and-nf-%C3%AE%C2%BAb-pathway-in-cardiomyocytes
#9
Yansong Li, Jingwen Xia, Nianxin Jiang, Yuqiong Xian, Haining Ju, Yong Wei, Xuan Zhang
BACKGROUND: The functional role of corin in H2O2-induced apoptosis is largely unexplored. The present study investigated the protective role of corin against cell injury by possible involvement of PI3K/AKT and NF-kB signaling pathways in cardiomyocytes. METHOD: Cardiomyocytes H9c2 and HL-1 cells were used in the study. Cell viability was measured using CCK-8 assay; cell apoptosis was analyzed by flow cytometry, TUNEL assay, and western blot; and cell migration was measured using wound healing assay...
November 1, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29101755/sub-cytotoxic-concentrations-of-ionic-silver-promote-the-proliferation-of-human-keratinocytes-by-inducing-the-production-of-reactive-oxygen-species
#10
Xiaodong Duan, Daizhi Peng, Yilan Zhang, Yalan Huang, Xiao Liu, Ruifu Li, Xin Zhou, Jing Liu
Silver-containing preparations are widely used in the management of skin wounds, but the effects of silver ions on skin wound healing remain poorly understood. This study investigated the effects of silver ions (Ag(+)) on the proliferation of human skin keratinocytes (HaCaT) and the production of intracellular reactive oxygen species (ROS). After treating HaCaT cells with Ag(+) and/or the active oxygen scavenger N-acetyl cysteine (NAC), cell proliferation and intracellular ROS generation were assessed using CCK-8 reagent and DCFH-DA fluorescent probe, respectively...
November 3, 2017: Frontiers of Medicine
https://www.readbyqxmd.com/read/29078897/investigation-of-blood-coagulation-effect-of-nonthermal-multigas-plasma-jet-in%C3%A2-vitro-and-in%C3%A2-vivo
#11
Yudai Nomura, Toshihiro Takamatsu, Hiroaki Kawano, Hidekazu Miyahara, Akitoshi Okino, Masaru Yoshida, Takeshi Azuma
BACKGROUND: Nonthermal atmospheric pressure plasma (NTAPP) has recently received attention as a novel tool in medicine. It is thought that plasma components yield plasma effects such as sterilization, blood coagulation, and wound healing. These effects are produced without thermal damage. We investigated the blood coagulation effect of NTAPP by using a multigas plasma jet. MATERIALS AND METHODS: Multigas plasma jets can generate NTAPP by several gas species. In this study, argon, oxygen, helium, nitrogen, mock air, and carbon dioxide were used to generate NTAPP, and blood coagulation times were compared with each plasma-treated sample...
November 2017: Journal of Surgical Research
https://www.readbyqxmd.com/read/29078200/ceria-nanocrystals-decorated-mesoporous-silica-nanoparticle-based-ros-scavenging-tissue-adhesive-for-highly-efficient-regenerative-wound-healing
#12
Haibin Wu, Fangyuan Li, Shuaifei Wang, Jingxiong Lu, Jinquan Li, Yang Du, Xiaolian Sun, Xiaoyuan Chen, Jianqing Gao, Daishun Ling
Restoration of tissue integrity and tissue function of wounded skin are both essential for wound repair and regeneration, while synergistic promotion of the two remains elusive. Since elevated reactive oxygen species (ROS) production in the injured site has been implicated in triggering a set of deleterious effects such as cellular senescence, fibrotic scarring, and inflammation, it is speculated that alleviating oxidative stress in the microenvironment of injured site would be beneficial to promote regenerative wound healing...
October 12, 2017: Biomaterials
https://www.readbyqxmd.com/read/29076318/polydeoxyribonucleotide-improves-peripheral-tissue-oxygenation-and-accelerates-angiogenesis-in-diabetic-foot-ulcers
#13
Seoyoung Kim, Junhyung Kim, Jaehoon Choi, Woonhyeok Jeong, Sunyoung Kwon
BACKGROUND: Polydeoxyribonucleotide (PDRN) is known to have anti-inflammatory and angiogenic effects and to accelerate wound healing. The aim of this study was to investigate whether PDRN could improve peripheral tissue oxygenation and angiogenesis in diabetic foot ulcers. METHODS: This was a prospective randomized controlled clinical trial. Twenty patients with a non-healing diabetic foot ulcer were randomly distributed into a control group (n=10) and a PDRN group (n=10)...
November 2017: Archives of Plastic Surgery
https://www.readbyqxmd.com/read/29076251/extracorporeal-magnetic-approach-to-reduce-the-unwanted-side-effects-and-improve-antibacterial-activity-of-ag-fe3-o4-nanocomposites-in-rat
#14
Chao Chen, Dong-Lin Xia, Ling-Yan Guo, Yan-Pei Chen, Xiao-Dong Li, Yu-Fei Wang, Duo Zhang, Yu-Ying Wang, Yu-Xin Zhang, Hong He, Hai-Ying Gu
While Ag nanoparticles hold great promise for broad spectrum antibacterial activity, the potential risks of Ag nanoparticles (NPs) on human health remain a challenge. In this study, Ag/Fe3 O4 composites have been successfully prepared and characterized by transmission electron microscopy, X-ray powder diffraction, and Fourier-transform infrared spectroscopy, and their magnetic and antibacterial properties have been assessed. In vivo results show that the antibacterial effect of 500 μg/mL Ag/Fe3 O4 nanocomposites was significantly higher than that of 1000 μg/mL AgNPs after 72 h of treatment (p < 0...
October 27, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/29076239/use-of-epidermal-skin-grafts-in-chronic-wounds-a-case-series
#15
Peter Am Everts, Marco Warbout, Diana de Veth, Merel Cirkel, Nicole E Spruijt, Jaap Buth
In stalled, chronic wounds, more aggressive and proactive wound closure efforts are needed. We describe adjunctive use of epidermal grafting in patients with chronic wounds. Wound bed preparation consisted of surgical necrotectomy or sharp debridement, hyperbaric oxygen therapy, negative pressure wound therapy, compression therapy, platelet-rich plasma therapy and/or heparan sulphate agents. Epidermal grafts were harvested from the patient's thigh and applied to the wound. Wound and donor site healing was monitored...
October 27, 2017: International Wound Journal
https://www.readbyqxmd.com/read/29074815/hyperbaric-oxygen-therapy-in-the-treatment-of-ischemic-lower-extremity-ulcers-in-patients-with-diabetes-results-of-the-damo2cles-multicenter-randomized-clinical-trial
#16
Katrien T B Santema, Robert M Stoekenbroek, Mark J W Koelemay, Jim A Reekers, Laura M C van Dortmont, Arno Oomen, Luuk Smeets, Jan J Wever, Dink A Legemate, Dirk T Ubbink
OBJECTIVE: Conflicting evidence exists on the effects of hyperbaric oxygen therapy (HBOT) in the treatment of chronic ischemic leg ulcers. The aim of this trial was to investigate whether additional HBOT would benefit patients with diabetes and ischemic leg ulcers. RESEARCH DESIGN AND METHODS: Patients with diabetes with an ischemic wound (n = 120) were randomized to standard care (SC) without or with HBOT (SC+HBOT). Primary outcomes were limb salvage and wound healing after 12 months, as well as time to wound healing...
October 26, 2017: Diabetes Care
https://www.readbyqxmd.com/read/29073253/nrf2-is-highly-expressed-in-neutrophils-but-myeloid-cell-derived-nrf2-is-dispensable-for-wound-healing-in-mice
#17
Natasha Joshi, Sabine Werner
Immune cells of the myeloid lineage are key players in skin wound healing, since they secrete various cytokines and growth factors that orchestrate the repair process. In addition, they are crucial for the defense against invading pathogens through their capacity to produce high levels of reactive oxygen species (ROS). To limit the toxicity of ROS, cells have developed antioxidant defense strategies, including expression of the cytoprotective NRF2 transcription factor. Here we show that murine neutrophils and to a lesser extent macrophages strongly express Nrf2 already when present in the circulation and in particular at the wound site...
2017: PloS One
https://www.readbyqxmd.com/read/29062634/septic-shock-following-prostate-biopsy-aggressive-limb-salvage-for-extremities-after-pressor-induced-ischemic-gangrene
#18
Jocelyn Lu, Tammer Elmarsafi, Chrisovalantis Lakhiani, Sarah R Sher, Christopher Attinger, Karen K Evans
Vasopressors used to treat patients with septic shock can cause ischemic necrosis of appendages such as the ears and nose, as well as the extremities. Cases of quadruple-extremity necrosis have high morbidity and mortality, and a profound negative impact on quality of life. This case report details the successful limb salvage and return to function using free tissue transfer as a means to salvage bilateral lower extremities in a patient who suffered vasopressor-induced ischemia of upper and lower extremities after prostate biopsy-induced septic shock...
September 2017: Plastic and Reconstructive Surgery. Global Open
https://www.readbyqxmd.com/read/29049260/a-quantitative-analysis-of-microcirculation-in-skin-defects-covered-with-topical-wound-dressings-or-a-newly-developed-collagen-matrix
#19
Manuel Held, Fabian Medved, Wiebke Petersen, Dascha Sophie Tolzmann, Afshin Rahmanian-Schwarz, Hans-Eberhard Schaller, Jens Rothenberger
OBJECTIVE: Innovative skin substitutes and temporary wound dressings are frequently used in the treatment of superficial and partial-thickness wounds. The aim of this study was to compare 2 commonly used temporary skin dressings with a newly developed collagen matrix to determine changes in microcirculation as measured by blood flow, hemoglobin oxygenation, and relative hemoglobin values during healing of partial-thickness skin defects. METHODS: This animal study involved 28 adult male Lewis rats...
November 2017: Advances in Skin & Wound Care
https://www.readbyqxmd.com/read/29042175/calcitriol-promotes-proangiogenic-molecules-in-keratinocytes-in-a-diabetic-foot-ulcer-model
#20
Valentin Trujillo, Paulina Marín-Luevano, Irma González-Curiel, Adrián Rodríguez-Carlos, Maira Ramírez-Reyes, Esther Layseca-Espinosa, José A Enciso-Moreno, Lorenza Díaz, Bruno Rivas-Santiago
Foot ulceration is one of the most common and complex sequelae of diabetes mellitus, generally posing a therapeutic challenge due to poor healing responses and high rates of complications, including peripheral vascular disease, ischemia and infections. Calcitriol, the most active vitamin D metabolite, induces antimicrobial peptides production in keratinocytes from diabetic foot ulcers (DFU); however, little is known about its effects on angiogenic factors in this pathology. Herein we aimed at studying whether calcitriol induces angiogenic molecules in keratinocytes under normoxic and hypoxic conditions, and if these molecules are able to improve cell migration in vitro...
November 2017: Journal of Steroid Biochemistry and Molecular Biology
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