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https://www.readbyqxmd.com/read/28648041/-effects-of-hypoxia-on-the-phenotype-transformation-of-human-dermal-fibroblasts-to-myofibroblasts-and-the-mechanism
#1
B Zhao, F Han, W Zhang, X J Wang, J Zhang, F F Yang, J H Shi, L L Su, D H Hu
Objective: To investigate the effects of hypoxia on the phenotype transformation of human dermal fibroblasts to myofibroblasts and the mechanism. Methods: The third passage of healthy adult human dermal fibroblasts in logarithmic phase were cultured in DMEM medium containing 10% fetal bovine serum for the following five experiments. (1) In experiments 1, 2, and 3, cells were divided into normoxia group and hypoxia group according to the random number table, with 10 dishes in each group. Cells of normoxia group were cultured in incubator containing 21% oxygen, while those of hypoxia group with 1% oxygen...
June 20, 2017: Zhonghua Shao Shang za Zhi, Zhonghua Shaoshang Zazhi, Chinese Journal of Burns
https://www.readbyqxmd.com/read/28648040/-effects-of-seawater-immersion-on-the-inflammatory-response-and-oxygen-free-radical-injury-of-rats-with-superficial-partial-thickness-scald-at-early-stage
#2
Y X Yang, J H Wang, L Liu, Q Zou, Y Zhang, Z Bai
Objective: To study the effects of seawater immersion on the inflammatory response and oxygen free radical injury of rats with superficial-thickness scald at early stage. Methods: Seventy Wistar rats were divided into healthy control group (HC, n=7), pure scald group (PS, n=21), scald+ fresh water immersion group (SF, n=21), and scald+ seawater immersion group (SS, n=21) according to the random number table. Rats in group HC did not receive any treatment, while 5% total body surface area superficial partial-thickness scald was made on the back of rats in the latter three groups...
June 20, 2017: Zhonghua Shao Shang za Zhi, Zhonghua Shaoshang Zazhi, Chinese Journal of Burns
https://www.readbyqxmd.com/read/28648026/-serum-uric-acid-is-associated-with-disease-severity-and-an-important-predictor-for-clinical-outcome-in-patients-with-pulmonary-hypertension
#3
D L Luo, C J Zhang, Y G Huang, T Huang, H Z Li
Objective: The growing body of literature showed a link between uric acid and pulmonary hypertension (PH), but the impact of hyperuremia on outcome of patients with PH has not been well defined. Therefore, the present study was performed to analyze the impact of uric acid on outcome of PH patients. Methods: One hundred seventy-three PH patients (112 females, mean age 38 years old), who were hospitalized in our department between January 2010 and December 2015, were included in our study, the PH diagnosis was made based on right heart catheterization examination result (mean pulmonary artery pressure≥25 mmHg(1 mmHg=0...
June 24, 2017: Zhonghua Xin Xue Guan Bing za Zhi
https://www.readbyqxmd.com/read/28647926/importance-of-gold-guidelines-for-chronic-obstructive-pulmonary-disease
#4
J Sadlonova, D Osinova, E Rozborilova, O Osina, E Novakova, V Sadlonova
In December 2011, a major revision of GOLD 2011 guidelines was published based on the evidence-based medicine. The goal of GOLD 2011 is to determine the severity of the disease, its impact on the patient's health, and the risk of future events; all of which eventually guide therapy. A combined COPD assessment according to GOLD 2011 considers the patient's level of symptoms, spirometry abnormalities, risk of exacerbation, and the presence of comorbidities. GOLD 2011 stratifies patients into four basic groups labeled A, B, C, and D...
June 25, 2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28647924/comparative-expression-analysis-of-rice-and-arabidopsis-peroxiredoxin-genes-suggests-conserved-or-diversified-roles-between-the-two-species-and-leads-to-the-identification-of-tandemly-duplicated-rice-peroxiredoxin-genes-differentially-expressed-in-seeds
#5
Yun-Shil Gho, Sun-A Park, Sung-Ruyl Kim, Anil Kumar Nalini Chandran, Gynheung An, Ki-Hong Jung
BACKGROUND: Peroxiredoxins (PRXs) have recently been identified as plant antioxidants. Completion of various genome sequencing projects has provided genome-wide information about PRX genes in major plant species. Two of these -- Oryza sativa (rice) and Arabidopsis -- each have 10 PRX members. Although significant progress has been made in understanding their biological roles in Arabidopsis, those functions in rice, a model crop plant, have not been well studied. RESULTS: We performed a comparative expression analysis of rice and Arabidopsis PRXs...
December 2017: Rice
https://www.readbyqxmd.com/read/28647909/organic-matter-export-to-the-seafloor-in-the-baltic-sea-drivers-of-change-and-future-projections
#6
Tobias Tamelander, Kristian Spilling, Monica Winder
The impact of environmental change and anthropogenic stressors on coastal marine systems will strongly depend on changes in the magnitude and composition of organic matter exported from the water column to the seafloor. Knowledge of vertical export in the Baltic Sea is synthesised to illustrate how organic matter deposition will respond to climate warming, climate-related changes in freshwater runoff, and ocean acidification. Pelagic heterotrophic processes are suggested to become more important in a future warmer climate, with negative feedbacks to organic matter deposition to the seafloor...
June 24, 2017: Ambio
https://www.readbyqxmd.com/read/28647878/selection-of-zygosaccharomyces-rouxii-strains-resistant-to-cadmium-with-improved-removal-abilities-through-ultraviolet-diethyl-sulfate-cooperative-mutagenesis
#7
Yu Liu, Ying Xu, Dongfeng Wang, Wei Jiang
Cd(2+) resistance and bioaccumulation capacity were selected from parental Zygosaccharomyces rouxii (CRZ-0) while maintaining NaCl tolerance using protoplast mutagenesis technology. Ultraviolet-diethyl sulfate (UV-DES) cooperative mutagenesis, followed by preliminary screening and rescreening, was used to select the mutant strain CRZ-9. CRZ-9 grew better than CRZ-0 in YPD medium with 20 or 50 mg L(-1) of Cd(2+). Scanning electron microscopy observations and flow cytometry tests indicated that CRZ-9 was more effective at eliminating reactive oxygen species (ROS) generated by Cd(2+), which led to less cellular structural damage and lower lethality...
June 25, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28647868/effects-of-high-altitude-exposure-on-supraspinal-fatigue-and-corticospinal-excitability-and-inhibition
#8
Mathieu Marillier, Pierrick J Arnal, Thibault Le Roux Mallouf, Thomas Rupp, Guillaume Y Millet, Samuel Verges
PURPOSE: While acute hypoxic exposure enhances exercise-induced central fatigue and can alter corticospinal excitability and inhibition, the effect of prolonged hypoxic exposure on these parameters remains to be clarified. We hypothesized that 5 days of altitude exposure would (i) normalize exercise-induced supraspinal fatigue during isolated muscle exercise to sea level (SL) values and (ii) increase corticospinal excitability and inhibition. METHODS: Eleven male subjects performed intermittent isometric elbow flexions at 50% of maximal voluntary contraction to task failure at SL and after 1 (D1) and 5 (D5) days at 4350 m...
June 24, 2017: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/28647857/ros-modulated-therapeutic-approaches-in-cancer-treatment
#9
REVIEW
Muhammad Hassan Raza, Sami Siraj, Abida Arshad, Usman Waheed, Fahad Aldakheel, Shatha Alduraywish, Muhammad Arshad
PURPOSE: Reactive oxygen species (ROS) are produced in cancer cells as a result of increased metabolic rate, dysfunction of mitochondria, elevated cell signaling, expression of oncogenes and increased peroxisome activities. Certain level of ROS is required by cancer cells, above or below which lead to cytotoxicity in cancer cells. This biochemical aspect can be exploited to develop novel therapeutic agents to preferentially and selectively target cancer cells. METHODS: We searched various electronic databases including PubMed, Web of Science, and Google Scholar for peer-reviewed english-language articles...
June 24, 2017: Journal of Cancer Research and Clinical Oncology
https://www.readbyqxmd.com/read/28647854/the-influence-of-head-of-bed-elevation-in-patients-with-obstructive-sleep-apnea
#10
Fábio José Fabrício de Barros Souza, Pedro Rodrigues Genta, Albino José de Souza Filho, Andrew Wellman, Geraldo Lorenzi-Filho
PURPOSE: The purpose of this study is to test the effects of a mild degree of head-of-bed elevation (HOBE) (7.5°) on obstructive sleep apnea (OSA) severity and sleep quality. METHODS: OSA patients were recruited from a single sleep clinic (Criciúma, Santa Catarina, Brazil). Following a baseline polysomnography (PSG), all patients underwent a PSG with HOBE (within 2 weeks). In addition, a subset of patients performed a third PSG without HOBE. RESULTS: Fifty-two patients were included in the study (age 53...
June 24, 2017: Sleep & Breathing, Schlaf & Atmung
https://www.readbyqxmd.com/read/28647835/resveratrol-alleviates-inflammatory-hyperalgesia-by-modulation-of-reactive-oxygen-species-ros-antioxidant-enzymes-and-erk-activation
#11
Ajeet Kumar Singh, Manjula Vinayak
OBJECTIVES: Impact of ROS in development of hyperalgesia has recently motivated scientists to focus on ROS as novel target of anti-hyperalgesic interventions. However, role of ROS in molecular signaling of hyperalgesia is still poorly understood. The present study is aimed to analyze the effect of dietary antioxidant resveratrol on antioxidant defense system, ROS level and TNFR1-ERK signaling pathway during early and late phase of inflammatory hyperalgesia. METHODS AND MATERIALS: Hyperalgesia was assessed by paw withdrawal latency test in complete Freund's adjuvant-induced hyperalgesic rats...
June 24, 2017: Inflammation Research: Official Journal of the European Histamine Research Society ... [et Al.]
https://www.readbyqxmd.com/read/28647826/numerical-simulation-of-a-glucose-sensitive-composite-membrane-closed-loop-insulin-delivery-system
#12
Shashi Bajaj Mukherjee, Debabrata Datta, Soumyendu Raha, Debnath Pal
Closed-loop insulin delivery system works on pH modulation by gluconic acid production from glucose, which in turn allows regulation of insulin release across membrane. Typically, the concentration variation of gluconic acid can be numerically modeled by a set of non-linear, non-steady state reaction diffusion equations. Here, we report a simpler numerical approach to time and position dependent diffusivity of species using finite difference and differential quadrature (DQ) method. The results are comparable to that obtained by analytical method...
June 24, 2017: Bioprocess and Biosystems Engineering
https://www.readbyqxmd.com/read/28647787/using-stem-cell-oxygen-physiology-to-optimize-blastocyst-culture-while-minimizing-hypoxic-stress
#13
REVIEW
Alan Bolnick, Awoniyi O Awonuga, Yu Yang, Mohammed Abdulhasan, Yufen Xie, Sichang Zhou, Elizabeth E Puscheck, Daniel A Rappolee
This review is a response to the Fellows Forum on testing 2% oxygen for best culture of human blastocysts (J Ass Reprod Gen 34:303-8, 1; J Ass Reprod Gen 34:309-14, 2) prior to embryo transfer. It is a general analysis in support of the position that an understanding of stem cell physiology and responses to oxygen are necessary for optimization of blastocyst culture in IVF and to enhance reproductive success in fertile women.
June 24, 2017: Journal of Assisted Reproduction and Genetics
https://www.readbyqxmd.com/read/28647734/mir-4673-modulates-paclitaxel-induced-oxidative-stress-and-loss-of-mitochondrial-membrane-potential-by-targeting-8-oxoguanine-dna-glycosylase-1
#14
Hai-Li Huang, Ya-Peng Shi, Hui-Juan He, Ya-Hong Wang, Ting Chen, La-Wei Yang, Teng Yang, Jie Chen, Jun Cao, Wei-Min Yao, Gang Liu
BACKGROUND: Our previous study identified a novel microRNA, miR-4673, which is upregulated in A549 cells exposed to paclitaxel (PTX). In this study, we investigated the role of miR-4673 in PTX-induced cytotoxicity. METHODS: 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide (MTT) assay, apoptosis assay, 5,5',6,6'-Tetrachloro-1,1',3,3'-tetraethyl-imidacarbocyanine iodide (JC-1) staining and 2',7'-Dichlorofluorescein (DCFH) staining were used to evaluate cell viability, apoptosis, mitochondrial membrane potential (MMP) loss and reactive oxygen species (ROS) generation in A549 and H1299 cells...
June 26, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28647695/the-warburg-effect-and-mass-spectrometry-based-proteomic-analysis
#15
REVIEW
Weidong Zhou, Lance A Liotta, Emanuel F Petricoin
Compared to normal cells, cancer cells have a unique metabolism by performing lactic acid fermentation in the presence of oxygen, also known as the Warburg effect. Researchers have proposed several hypotheses to elucidate the phenomenon, but the mechanism is still an enigma. In this review, we discuss three typical models, such as "damaged mitochondria", "adaptation to hypoxia", and "cell proliferation requirement", as well as contributions from mass spectrometry analysis toward our understanding of the Warburg effect...
July 2017: Cancer Genomics & Proteomics
https://www.readbyqxmd.com/read/28647616/photodynamic-therapy-in-dermatology-beyond-non-melanoma-cancer-an-update
#16
REVIEW
Xiang Wen, Yong Li, Michael R Hamblin
Photodynamic therapy (PDT) employs a photosensitizer (PS) and visible light in the presence of oxygen, leading to production of cytotoxic reactive oxygen species, which can damage the cellular organelles and cause cell death. In dermatology PDT has usually taken the form of topical application of a precursor in the heme biosynthesis pathway, called 5-aminolevulinic acid (or its methyl ester), so that an active PS, protoporphyrin IX accumulates in the skin. As PDT enhances dermal remodeling and resolves chronic inflamation, it has been used to treat cutaneous disorders include actinic keratoses, acne, viral warts, skin rejuvenation, psoriasis, localized scleroderma, some non-melanoma skin cancers and port-wine stains...
June 21, 2017: Photodiagnosis and Photodynamic Therapy
https://www.readbyqxmd.com/read/28647611/autophagy-suppresses-isoprenaline-induced-m2-macrophage-polarization-via-the-ros-erk-and-mtor-signaling-pathway
#17
Meihua Shan, Junfang Qin, Fengjiao Jin, Xiao Han, Haitao Guan, Xiaoge Li, Jiahui Zhang, Hongyao Zhang, Yue Wang
The objective of this study was to examine the effect of autophagy on stress-induced M2 macrophage polarization in the tumor microenvironment of breast cancer and to determine whether the underlying mechanism was related to the reactive oxygen species (ROS)/ERK and mTOR pathway. In vitro, we found that the basal autophagy level in mouse RAW 264.7 macrophages decreased with the incubation of tumor cell culture supernatant. Similarly, the polarization of RAW 264.7 to M2 macrophages was inhibited by the autophagy inducer rapamycin and increased by the autophagy inhibitor 3-MA or by siBeclin1...
June 21, 2017: Free Radical Biology & Medicine
https://www.readbyqxmd.com/read/28647604/hydrogen-rich-water-induces-aluminum-tolerance-in-maize-seedlings-by-enhancing-antioxidant-capacities-and-nutrient-homeostasis
#18
Xueqiang Zhao, Qiuhong Chen, Yanmei Wang, Zhenguo Shen, Wenbiao Shen, Xiaoming Xu
The ameliorative effect of H2 on aluminum (Al)-induced stress remains poorly understood. We treated maize seedlings with Al and hydrogen-rich water (HRW) to determine the roles of H2 in the alleviation of Al toxicity. Our results demonstrated that Al stress triggered damage to the photosynthetic apparatus, plant growth inhibition, and reactive oxygen species (ROS) production, and boosted lipid peroxidation. However, the addition of HRW at 75% saturation markedly alleviated Al toxicity symptoms through the promotion of root elongation...
June 22, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28647597/hypoxic-postconditioning-improves-behavioural-deficits-at-6-weeks-following-hypoxic-ischemic-brain-injury-in-neonatal-rats
#19
Jonathan D Teo, Margaret J Morris, Nicole M Jones
Hypoxic-ischemic (HI) brain injury in newborns is associated with high morbidity and mortality, with many babies suffering neurological deficits. Recently, we showed that hypoxic postconditioning (PostC) immediately post injury can protect against HI up to one week in neonatal rats. Here, we aimed to examine whether long term functional deficits were also improved by PostC. Sprague-Dawley rats were assigned to control (C) or HI group on postnatal day 7 (P7). The HI group underwent unilateral carotid artery occlusion followed by hypoxia (7% oxygen, 3h)...
June 21, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/28647514/aqueous-cigarette-tar-extracts-disrupt-corticogenesis-from-human-embryonic-stem-cells-in-vitro
#20
Aynun N Begum, Jose S Aguilar, Yiling Hong
BACKGROUND: Cigarette butts are the most common form of litter in the world, and approximately 4.5 trillion smoked cigarettes are discarded every year worldwide. Cigarette butts contain over 4000 chemicals, many of which are known to have neurotoxic effects. Stem cell neuronal differentiation provides an excellent cellular model with which to examine the impact of aqueous cigarette tar extracts (ACTEs) on neurodevelopment. METHODS: We have developed a neurosphere-based stem cell neuronal differentiation protocol that can recapitulate corticogenesis and produce cell types that are similar to upper and lower layer cortical projection neurons found in the germinal zone of the developing human cortex...
June 22, 2017: Environmental Research
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