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Wound healing and oxygenation

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https://www.readbyqxmd.com/read/28724216/the-extract-from-punica-granatum-pomegranate-peel-induces-apoptosis-and-impairs-metastasis-in-prostate-cancer-cells
#1
Yuanle Deng, Yali Li, Fangfang Yang, Anqi Zeng, Shuping Yang, Yi Luo, Yiwen Zhang, Yongmei Xie, Tinghong Ye, Yong Xia, Wenya Yin
Prostate cancer is a big threat to male for its poor prognosis and high mortality rate. Natural compounds are important resources of many anticancer drugs. Pomegranate is a kind of antioxidant-rich fruit and its peel and seed has potential anticancer activities. In this study, we aimed to investigate the effects of pomegranate peel extract (PoPx) on the apoptosis and metastasis of prostate cancer cells and the related mechanism. We found that PoPx showed growth inhibition on prostate cancer cells. Nuclei morphological and flow cytometer (FCM) analysis indicated that PoPx could induce prostate cancer apoptosis...
July 14, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28704790/pharmacological-activities-of-an-eye-drop-containing-matricaria-chamomilla-and-euphrasia-officinalis-extracts-in-uvb-induced-oxidative-stress-and-inflammation-of-human-corneal-cells
#2
Elisabetta Bigagli, Lorenzo Cinci, Mario D'Ambrosio, Cristina Luceri
Ultraviolet B (UVB) exposure is a risk factor for corneal damage resulting in oxidative stress, inflammation and cell death. The aim of this study was to investigate the potential protective effects of a commercial eye drop (Dacriovis™) containing Matricaria chamomilla and Euphrasia officinalis extracts on human corneal epithelial cells (HCEC-12) against UVB radiation-induced oxidative stress and inflammation as well as the underlying mechanisms. The antioxidant potential of the eye drops was evaluated by measuring the ferric reducing antioxidant power and the total phenolic content by Folin-Ciocalteu reagent...
June 24, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28704726/bnip3-induction-by-hypoxia-stimulates-fasn-dependent-free-fatty-acid-production-enhancing-therapeutic-potential-of-umbilical-cord-blood-derived-human-mesenchymal-stem-cells
#3
Hyun Jik Lee, Young Hyun Jung, Gee Euhn Choi, So Hee Ko, Sei-Jung Lee, Sang Hun Lee, Ho Jae Han
Mitophagy under hypoxia is an important factor for maintaining and regulating stem cell functions. We previously demonstrated that fatty acid synthase (FASN) induced by hypoxia is a critical lipid metabolic factor determining the therapeutic efficacy of umbilical cord blood-derived human mesenchymal stem cells (UCB-hMSCs). Therefore, we investigated the mechanism of a major mitophagy regulator controlling lipid metabolism and therapeutic potential of UCB-hMSCs. This study revealed that Bcl2/adenovirus E1B 19kDa protein-interacting protein 3 (BNIP3)-dependent mitophagy is important for reducing mitochondrial reactive oxygen species accumulation, anti-apoptosis, and migration under hypoxia...
July 4, 2017: Redox Biology
https://www.readbyqxmd.com/read/28704149/amputation-predictors-in-diabetic-foot-ulcers-treated-with-hyperbaric-oxygen
#4
S T Kaplan, D Hemsinli, S Kaplan, A Arslan
OBJECTIVE: Although hyperbaric oxygen therapy (HBOT) has long been used for diabetic foot ulcers (DFUs), its effectiveness is still controversial. The aim of this study was to investigate the efficacy of HBOT in the management of DFUs and identify amputation predictors. METHOD: Patients with chronic DFUs (Wanger grade 2-5) were included in the study, which took place between January 2010 and December 2012. HBOT, 100% oxygen, 2.4 atmosphere absolute (ATA) for 120 minutes, was administered to all patients in addition to standard treatment...
July 2, 2017: Journal of Wound Care
https://www.readbyqxmd.com/read/28702902/oxygenation-status-in-chronic-leg-ulcer-after-topical-hemoglobin-application-may-act-as-a-surrogate-marker-to-find-the-best-treatment-strategy-and-to-avoid-ineffective-conservative-long-term-therapy
#5
Maximilian Petri, Ingo Stoffels, Klaus Griewank, Jithin Jose, Peter Engels, Andrea Schulz, Harald Pötzschke, Philipp Jansen, Dirk Schadendorf, Joachim Dissemond, Joachim Klode
PURPOSE: Chronic leg ulcers can be a challenge to treat and long-term therapy a significant cost factor in western public health budgets. Objective wound assessment assays enabling selection of appropriate wound therapy regimes would be desirable. Oxygenation status in ulcer tissue has obtained increased attention as a relevant factor in wound healing. To increase oxygenation in wounds, a topical hemoglobin spray was developed. Although favorable results have been noted, the link between clinical efficacy and the mode of action has not been demonstrated...
July 12, 2017: Molecular Imaging and Biology: MIB: the Official Publication of the Academy of Molecular Imaging
https://www.readbyqxmd.com/read/28702585/graphene-oxide-stabilized-perfluorocarbon-emulsions-for-controlled-oxygen-delivery
#6
Ghulam Jalani, Dhanalakshmi Jeyachandran, Richard Bertram Church, Marta Cerruti
Perfluorocarbon (PFC) emulsions are capable of absorbing large quantities of oxygen. They are widely used as blood alternates for quick oxygenation of tissues. However, they are unsuitable for applications where sustained oxygen supply is desired over an extended period of time. Here, we have designed a new PFC oxygen delivery system that combines perfluorodecalin with graphene oxide (GO), where GO acts both as an emulsifier and a stabilizing agent. The resulting emulsions (PFC@GO) release oxygen at least one order of magnitude slower than emulsions prepared with other common surfactants...
July 12, 2017: Nanoscale
https://www.readbyqxmd.com/read/28699352/redox-signaling-in-diabetic-wound-healing-regulates-extracellular-matrix-deposition
#7
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/28698076/synthesis-and-characterization-of-chitosan-pvp-nanocellulose-composites-for-in-vitro-wound-dressing-application
#8
R Poonguzhali, S Khaleel Basha, V Sugantha Kumari
Biocompatible Chitosan/Poly (vinyl pyrrolidone)/Nanocellulose (CPN) composites were successfully prepared by solution casting method. The prepared bionanocomposites were characterized by Transmission electron microscopy (TEM), Thermo gravimetric analysis (TGA), X-ray diffraction (XRD) and Attenuated total reflectance-Fourier transform infrared spectroscopy (ATR-FTIR) spectra. TEM images revealed the average particle size of the nanocellulose is 6.1nm. Thermogravimetric analysis indicated that the thermal stability of the composites was decreased with increasing concentration of nanocellulose...
July 8, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28697694/midterm-outcomes-from-a-pilot-study-of-percutaneous-deep-vein-arterialization-for-the-treatment-of-no-option-critical-limb-ischemia
#9
Steven Kum, Yih Kai Tan, Michiel A Schreve, Roberto Ferraresi, Ramon L Varcoe, Andrej Schmidt, Dierk Scheinert, Jihad A Mustapha, Darryl M Lim, Derek Ho, Tjun Y Tang, Vlad-Adrian Alexandrescu, Pramook Mutirangura
PURPOSE: To report the initial clinical experience with percutaneous deep vein arterialization (PDVA) to treat critical limb ischemia (CLI) via the creation of an arteriovenous fistula. METHODS: Seven patients (median age 85 years; 5 women) with CLI and no traditional endovascular or surgical revascularization options (no-option CLI) were recruited in a pilot study to determine the safety of PDVA. All patients were diabetic; 4 had Rutherford category 6 ischemia...
July 1, 2017: Journal of Endovascular Therapy
https://www.readbyqxmd.com/read/28693848/does-penile-tourniquet-application-alter-bacterial-adhesion-to-rat-urethral-cells-an-in-vitro-study
#10
Ozlem Boybeyi-Turer, Birgul Kacmaz, Esra Arat, Pınar Atasoy, Ucler Kisa, Yasemin Dere Gunal, Mustafa Kemal Aslan, Tutku Soyer
PURPOSE: To investigate the effects of penile tourniquet (PT) application on bacterial adhesion to urothelium. METHODS: Fifty-six rats were allocated into control group (CG), sham group (SG), PT group (PTG). No intervention was applied in CG. A 5mm-length urethral repair was performed in SG and PTG. In PTG, a 10-min duration of PT was applied during the procedure and the tissue oxygenation monitor was used to adjust the same degree of ischemia in all subjects. Samples were examined for wound healing parameters and tissue levels of inflammatory markers, eNOS, e-selectin, and ICAM-1antibodies...
June 28, 2017: Journal of Pediatric Surgery
https://www.readbyqxmd.com/read/28693576/cell-based-cytotoxicity-assays-for-engineered-nanomaterials-safety-screening-exposure-of-adipose-derived-stromal-cells-to-titanium-dioxide-nanoparticles
#11
Yan Xu, M Hadjiargyrou, Miriam Rafailovich, Tatsiana Mironava
BACKGROUND: Increasing production of nanomaterials requires fast and proper assessment of its potential toxicity. Therefore, there is a need to develop new assays that can be performed in vitro, be cost effective, and allow faster screening of engineered nanomaterials (ENMs). RESULTS: Herein, we report that titanium dioxide (TiO2) nanoparticles (NPs) can induce damage to adipose derived stromal cells (ADSCs) at concentrations which are rated as safe by standard assays such as measuring proliferation, reactive oxygen species (ROS), and lactate dehydrogenase (LDH) levels...
July 11, 2017: Journal of Nanobiotechnology
https://www.readbyqxmd.com/read/28687409/ephb2-signaling-mediated-sirt3-expression-reduces-msc-senescence-by-maintaining-mitochondrial-ros-homeostasis
#12
Young Hyun Jung, Hyun Jik Lee, Jun Sung Kim, Sei-Jung Lee, Ho Jae Han
Disruption of mitochondrial reactive oxygen species (mtROS) homeostasis is a key factor inducing UCB-MSC senescence. Accordingly, preventing mtROS accumulation will help in suppressing the UCB-MSC senescence. In this study, we observed that the expressions of EphrinB2 and EphB2 were inversely regulated by UCB-MSC passage-dependent manner. EphB2 signaling induced mitochondrial translocation of Sirt3. The knockdown of SIRT3 inhibited the effect of EphB2 signaling in UCB-MSCs. Subsequently, EphrinB2-Fc induced the nuclear translocation of Nrf-2 via c-Src phosphorylation dependent manner, and Sirt3 expression was regulated by Nrf-2...
July 4, 2017: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/28686979/high-mannose-n-glycan-binding-lectin-from-remusatia-vivipara-rvl-limits-cell-growth-motility-and-invasiveness-of-human-breast-cancer-cells
#13
B R Sindhura, Prajna Hegde, Vishwanath B Chachadi, Shashikala R Inamdar, Bale M Swamy
Breast cancer known for its high metastatic potential is responsible for large mortality rate amongst women; hence it is imperative to search for effective anti-metastatic molecules despite anticancer drugs. The current study describes the potential of Remusatia vivipara lectin (RVL), inducing apoptosis in breast cancer cells there by limiting motility and invasiveness. RVL binds to the cell surface glycans of MDA-MB-468 and MCF-7 cells, exhibiting strong glycan mediated cytotoxic effect, but show marginal effect on non-tumorigenic MCF-10A cells...
July 4, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28681187/intermittent-hypoxia-and-unsaturated-aldehydes-effects-on-oral-epithelial-wound-healing
#14
Katia Avezov, Lena Lavie, Dror Aizenbud
Obstructive sleep apnea (OSA) is a highly prevalent sleep breathing disorder characterized by intermittent hypoxia (IH), leading to blood hypoxemia, hypercapnia, and sleep fragmentation. Studies on the effects of OSA on oral epithelial tissue healing are limited. Smoking is considered a risk factor for OSA through the exposure to chemically active toxins, present in the smoke. Acrolein is the most chemically active unsaturated aldehyde, impairing a variety of biological processes. The aim of this study was to determine the effect of IH on oral epithelial tissue healing, with and without acrolein...
July 6, 2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28677217/age-associated-intracellular-superoxide-dismutase-deficiency-potentiates-dermal-fibroblast-dysfunction-during-wound-healing
#15
Toshihiro Fujiwara, Teruyuki Dohi, Zeshaan N Maan, Kristine C Rustad, Sun Hyung Kwon, Jagannath Padmanabhan, Alexander J Whittam, Hirotaka Suga, Dominik Duscher, Melanie Rodrigues, Geoffrey C Gurtner
Reactive oxygen species (ROS) impair wound healing through destructive oxidation of intracellular proteins, lipids, and nucleic acids. Intracellular superoxide dismutase (SOD1) regulates ROS levels and plays a critical role in tissue homeostasis. Recent evidence suggests that age-associated wound healing impairments may partially result from decreased SOD1 expression. We investigated the mechanistic basis by which increased oxidative stress links to age-associated impaired wound healing. Fibroblasts were isolated from unwounded skin of young and aged mice, and myofibroblast differentiation was assessed by measuring α-smooth muscle actin and collagen gel contraction...
July 4, 2017: Experimental Dermatology
https://www.readbyqxmd.com/read/28665427/effects-of-bioactive-compounds-on-senescence-and-components-of-senescence-associated-secretory-phenotypes-in-vitro
#16
REVIEW
Janubová Mária, Žitňanová Ingrid
Senescence is a permanent cell cycle arrest that is accompanied by changes in cell morphology and physiology occurring in vitro and in vivo. Senescence evolved as a beneficial response to damage promoting wound healing, limiting fibrosis, fighting against cancer and helping embryonic development. However, excessive accumulation of senescent cells is considered to play a substantial role in the development of aging-related diseases and other morphological and physiological changes associated with aging. Therefore, the aim of many researchers is to find out a way to eliminate senescent cells and improve the health condition of aging people...
July 19, 2017: Food & Function
https://www.readbyqxmd.com/read/28663896/evaluation-of-non-thermal-plasma-induced-anticancer-effects-on-human-colon-cancer-cells
#17
Jae-Sun Choi, Jeongho Kim, Young-Jun Hong, Woom-Yee Bae, Eun Ha Choi, Joo-Won Jeong, Hun-Kuk Park
Non-thermal atmospheric-pressure plasma has been introduced in various applications such as sterilization, wound healing, blood coagulation, and other biomedical applications. The most attractive application of non-thermal atmospheric-pressure plasma is in cancer treatment, where the plasma is used to produce reactive oxygen species (ROS) to facilitate cell apoptosis. We investigate the effects of different durations of exposure to dielectric-barrier discharge (DBD) plasma on colon cancer cells using measurement of cell viability and ROS levels, western blot, immunocytochemistry, and Raman spectroscopy...
May 1, 2017: Biomedical Optics Express
https://www.readbyqxmd.com/read/28654620/evidence-based-medicine-wound-management
#18
Christine M Jones, Alexis T Rothermel, Donald R Mackay
LEARNING OBJECTIVES: After reading this article, the participant should be able to: 1. Describe the basic science of chronic wounds. 2. Discuss the general and local factors that should be considered in any patient with a chronic wound. 3. Discuss the rationale of converting a chronic wound into an acute wound. 4. Describe techniques used to prepare chronic wounds. 5. Discuss the appropriate use of different dressings presented in this article. 6. Discuss the pros and cons of the adjuncts to wound healing discussed in this article...
July 2017: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/28654304/a-prospective-randomized-double-blind-multicenter-study-comparing-continuous-diffusion-of-oxygen-therapy-to-sham-therapy-in-the-treatment-of-diabetic-foot-ulcers
#19
Mark Q Niederauer, Joel E Michalek, David G Armstrong
BACKGROUND: Over the past generation, preclinical data have suggested that there is a potential physiologic benefit to applying oxygen topically to wounds. However, we are unaware of any studies in the literature that have robustly assessed whether this would lead to a higher proportion of healing in similarly treated people without oxygen. Therefore, the purpose of this study was to assess this in people being treated for chronic diabetic foot ulcers (DFUs). METHODS: We enrolled and randomized 100 subjects with DFUs (79% male, aged 58...
February 1, 2017: Journal of Diabetes Science and Technology
https://www.readbyqxmd.com/read/28642292/frequency-and-magnitude-of-intermittent-hypoxia-modulate-endothelial-wound-healing-in-a-cell-culture-model-of-sleep-apnea
#20
Noelia Campillo, Bryan Falcones, Josep M Montserrat, David Gozal, Ana Obeso, Teresa Gallego-Martin, Daniel Navajas, Isaac Almendros, Ramon Farre
Intermittent hypoxia (IH) has been implicated in the cardiovascular consequences of obstructive sleep apnea (OSA). However, the lack of suitable experimental systems has precluded assessment as to whether IH is detrimental, protective or both for the endothelium. The aim of the work was to determine the effects of frequency and amplitude of IH oxygenation swings on aortic endothelial wound healing. Monolayers of human primary endothelial cells were wounded, and subjected to constant oxygenation (1%, 4%, 13% or 20% O2) or IH at different frequencies (0...
June 22, 2017: Journal of Applied Physiology
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