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OSA oxidative stress

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https://www.readbyqxmd.com/read/29922222/cognitive-deficits-are-attenuated-in-neuroglobin-overexpressing-mice-exposed-to-a-model-of-obstructive-sleep-apnea
#1
Deepti Nair, Vijay Ramesh, David Gozal
Background: Obstructive sleep apnea (OSA) is a highly prevalent disease manifesting as intermittent hypoxia during sleep (IH) and is increasingly recognized as being independently associated with neurobehavioral deficits. These deficits may be due to increased apoptosis in the hippocampus and cerebral cortex, as well as increased oxidative stress and inflammation. It has been reported that neuroglobin (Ngb) is upregulated in response to hypoxia-ischemia insults and exhibits a protective role in ischemia-reperfusion brain injury...
2018: Frontiers in Neurology
https://www.readbyqxmd.com/read/29911908/effect-of-fixed-orthodontic-appliances-on-nonmicrobial-salivary-parameters
#2
Ioannis P Zogakis, Erez Koren, Shlomit Gorelik, Isaac Ginsburg, Miriam Shalish
OBJECTIVES: To examine possible changes in the levels of salivary antioxidants, C-reactive protein (CRP), cortisol, pH, proteins, and blood in patients treated with fixed orthodontic appliances. MATERIALS AND METHODS: Salivary samples from 21 orthodontic patients who met specific inclusion criteria were collected before the beginning of orthodontic treatment (T0; baseline), 1 hour after bonding (T1), and 4-6 weeks after bonding (T2). Oxidant-scavenging ability (OSA) was quantified using a luminol-dependent chemiluminescence assay...
June 18, 2018: Angle Orthodontist
https://www.readbyqxmd.com/read/29844673/mechanisms-of-oxidative-stress-apoptosis-and-autophagy-involved-in-graphene-oxide-nanomaterial-anti-osteosarcoma-effect
#3
Zhibing Tang, Lin Zhao, Zaixing Yang, Zhaohui Liu, Jia Gu, Bing Bai, Jinlian Liu, Jiaying Xu, Huilin Yang
Background: Graphene and its derivative graphene oxide (GO) have been implicated in a wide range of anticancer effects. Purpose: The objective of this study was to systematically evaluate the toxicity and underlying mechanisms of GO on two osteosarcoma (OSA) cancer cell lines, MG-63 and K7 M2 cells. Methods: MG-63 and K7 M2 cells were treated by GO (0-50 µg/mL) for various time periods. Cell viability was tested by MTT and Live/Dead assays...
2018: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/29804216/oxidative-stress-in-obese-children-and-adolescents-with-and-without-type-2-diabetes-mellitus-is-not-associated-with-obstructive-sleep-apnea
#4
Riva Tauman, Shlomit Shalitin, Lena Lavie
PURPOSE: Obesity, obstructive sleep apnea (OSA), and type 2 diabetes mellitus (T2DM) are associated with chronic low-grade inflammation and oxidative stress. In adults, increased lipid peroxidation, a marker of oxidative stress, was found in both metabolic syndrome and OSA. Studies on oxidative stress in children with T2DM and OSA are scarce. METHODS: Plasma oxidized low-density lipoprotein (Ox-LDL) levels were evaluated in obese children and adolescents with/without T2DM, and the contribution of OSA to oxidative stress was investigated...
May 26, 2018: Sleep & Breathing, Schlaf & Atmung
https://www.readbyqxmd.com/read/29782319/the-relationship-between-obstructive-sleep-apnea-and-alzheimer-s-disease
#5
Andreia G Andrade, Omonigho M Bubu, Andrew W Varga, Ricardo S Osorio
Obstructive sleep apnea (OSA) and Alzheimer's disease (AD) are highly prevalent conditions with growing impact on our aging society. While the causes of OSA are now better characterized, the mechanisms underlying AD are still largely unknown, challenging the development of effective treatments. Cognitive impairment, especially affecting attention and executive functions, is a recognized clinical consequence of OSA. A deeper contribution of OSA to AD pathogenesis is now gaining support from several lines of research...
2018: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/29770919/dl-propargylglycine-protects-against-myocardial-injury-induced-by-chronic-intermittent-hypoxia-through-inhibition-of-endoplasmic-reticulum-stress
#6
Xiufang Zhou, Si Tang, Ke Hu, Zhan Zhang, Pei Liu, Yuchuan Luo, Jing Kang, Lifang Xu
BACKGROUND: Chronic intermittent hypoxia (CIH), an important basis of the pathogenesis of organ damage induced by obstructive sleep apnea syndrome (OSAS), is associated with myocardial injury, such as left ventricular dysfunction, apoptosis, and oxidative stress. Endogenous hydrogen sulfide (H2 S) plays an important role in maintaining cardiovascular functions. Many studies have demonstrated that exogenous H2 S has protective effects against myocardial injury induced by various cardiovascular diseases, and inhibiting the generation of endogenous H2 S has opposite effects...
May 16, 2018: Sleep & Breathing, Schlaf & Atmung
https://www.readbyqxmd.com/read/29766271/obstructive-sleep-apnea-and-cerebral-white-matter-change-a-systematic-review-and-meta-analysis
#7
Bo-Lin Ho, Ping-Tao Tseng, Chiou-Lian Lai, Meng-Ni Wu, Ming-Ju Tsai, Cheng-Fang Hsieh, Tien-Yu Chen, Chung-Yao Hsu
Obstructive sleep apnea (OSA) can cause sleep fragmentation and intermittent hypoxemia, which are linked to oxidative stress. White matter changes (WMCs) representing cerebrovascular burden and are at risk factor for oxidative ischemic injury. The current study explores the mutual relationships between OSA and WMCs. We performed a systematic review of electronic databases for clinical studies investigating OSA and WMCs. Random-effects models were used for pooled estimates calculation. A total of 22 studies were included in the meta-analysis...
May 15, 2018: Journal of Neurology
https://www.readbyqxmd.com/read/29725493/intermittent-hypoxia-increases-the-severity-of-bleomycin-induced-lung-injury-in-mice
#8
Thomas Gille, Morgane Didier, Cécile Rotenberg, Eva Delbrel, Dominique Marchant, Angela Sutton, Nicolas Dard, Liasmine Haine, Nicolas Voituron, Jean-François Bernaudin, Dominique Valeyre, Hilario Nunes, Valérie Besnard, Emilie Boncoeur, Carole Planès
Background: Severe obstructive sleep apnea (OSA) with chronic intermittent hypoxia (IH) is common in idiopathic pulmonary fibrosis (IPF). Here, we evaluated the impact of IH on bleomycin- (BLM-) induced pulmonary fibrosis in mice. Methods: C57BL/6J mice received intratracheal BLM or saline and were exposed to IH (40 cycles/hour; FiO2 nadir: 6%; 8 hours/day) or intermittent air (IA). In the four experimental groups, we evaluated (i) survival; (ii) alveolar inflammation, pulmonary edema, lung oxidative stress, and antioxidant enzymes; (iii) lung cell apoptosis; and (iv) pulmonary fibrosis...
2018: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/29693002/matrix-metalloproteinase-9-is-a-predictive-factor-for-systematic-hypertension-and-heart-dysfunction-in-patients-with-obstructive-sleep-apnea-syndrome
#9
Shuhui Wang, Shisheng Li, Bin Wang, Jiajia Liu, Qinglai Tang
Patients with obstructive sleep apnea syndrome (OSAS) showed higher prevalence in cardiovascular diseases due to aberrant hypoxia and oxidative stress. However, not all OSAS patients end up with cardiovascular disorders, and identification of novel biomarker will be invaluable for differentiating patients at risk. Here we tested the serum matrix metalloproteinase-9 (MMP-9) levels in 47 untreated OSAS patients and found that the MMP-9 level was positively correlated with severity of OSAS, which was consistent with hypoxia degree and duration...
2018: BioMed Research International
https://www.readbyqxmd.com/read/29680435/comparison-of-two-exhaled-biomarkers-in-children-with-and-without-sleep-disordered-breathing
#10
Mario Barreto, Paolo Montuschi, Melania Evangelisti, Susanna Bonafoni, Manuela Cecili, Rugia Shohreh, Giuseppe Santini, Maria Pia Villa
OBJECTIVE: Airway oxidative stress and inflammation are likely to be involved in sleep disordered breathing (SDB) in children. We aimed to measure concentrations of 8-isoprostane (8-IsoP) in the exhaled breath condensate (EBC) and exhaled nitric oxide (FENO ) in patients with SBD and healthy children, in order to assess the relationship between these two biomarkers, disease severity, and overnight changes. METHODS: Patients with SDB (n = 46) and healthy controls (n = 20) aged 4...
May 2018: Sleep Medicine
https://www.readbyqxmd.com/read/29675134/leptin-and-leptin-resistance-in-the-pathogenesis-of-obstructive-sleep-apnea-a-possible-link-to-oxidative-stress-and-cardiovascular-complications
#11
REVIEW
Slava Berger, Vsevolod Y Polotsky
Obesity-related sleep breathing disorders such as obstructive sleep apnea (OSA) and obesity hypoventilation syndrome (OHS) cause intermittent hypoxia (IH) during sleep, a powerful trigger of oxidative stress. Obesity also leads to dramatic increases in circulating levels of leptin, a hormone produced in adipose tissue. Leptin acts in the hypothalamus to suppress food intake and increase metabolic rate. However, obese individuals are resistant to metabolic effects of leptin. Leptin also activates the sympathetic nervous system without any evidence of resistance, possibly because these effects occur peripherally without a need to penetrate the blood-brain barrier...
2018: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/29550481/protective-effect-of-sphingosine-1-phosphate-for-chronic-intermittent-hypoxia-induced-endothelial-cell-injury
#12
Fu-Chao Yu, Chu-Xiao Yuan, Jia-Yi Tong, Guang-Hao Zhang, Fang-Ping Zhou, Fang Yang
Intermittent hypoxia (IH) induced by obstructive sleep apnea (OSA) is the key factor in oxidative stress and the concomitant inflammation of endothelial cells (ECs). In recent years, the lipid sphingosine-1-phosphate (S1P) has been reported to probably play a central role in inflammatory diseases. However, its role in IH-induced endothelial injury remains uncertain. In this study, we investigated the IH-induced ECs inflammation and apoptosis, as well as the role of S1P in both. First, human umbilical vein endothelial cells (HUVECs) were treated with IH to explore the mechanism of S1P and S1P microbubbles (S1P-MBs) in HUVECs with altered function...
April 15, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29522877/metabonomic-profiling-of-chronic-intermittent-hypoxia-in-a-mouse-model
#13
Stéphanie Conotte, Alexandra Tassin, Raphaël Conotte, Jean-Marie Colet, Karim Zouaoui Boudjeltia, Alexandre Legrand
Chronic intermittent hypoxia (ChIH) is a dominant feature of obstructive sleep apnoea (OSA) and is associated to metabolic alterations and oxidative stress (OS). Although management of OSA is well established, the research of new biomarkers that are independent of confounding factors remains necessary to improve the early detection of comorbidity and therapeutic follow-up. In this study, the urinary metabonomic profile associated to intermittent hypoxia was evaluated in a mouse model. When exposed to intermittent hypoxia, animals showed a significant alteration in energy metabolism towards anaerobic pathways and signs of OS imbalance...
March 6, 2018: Respiratory Physiology & Neurobiology
https://www.readbyqxmd.com/read/29482817/elevated-tau-and-interleukin-6-concentrations-in-adults-with-obstructive-sleep-apnea
#14
Vida Motamedi, Rebekah Kanefsky, Panagiotis Matsangas, Sara Mithani, Andreas Jeromin, Matthew S Brock, Vincent Mysliwiec, Jessica Gill
Obstructive sleep apnea (OSA) is characterized by apneas and hypopneas that result in hypoxia, cerebral hypoperfusion, endothelial dysfunction, inflammation, and oxidative stress. These pathophysiologic processes likely contribute to neuronal damage. Tau is a protein that stabilizes microtubules and, along with amyloid beta (Aβ), is associated with neurodegenerative processes. We sought to determine if tau and other biomarkers of inflammation were related to OSA severity. Concentrations of tau, Aβ40, Aβ42, c-reactive protein (CRP), TNF-α, interleukin (IL)-6, and IL-10 were measured in blood and compared between participants with moderate-severe OSA (n = 28), those with mild OSA (n = 22), and healthy controls (n = 24)...
March 2018: Sleep Medicine
https://www.readbyqxmd.com/read/29433520/intermittent-hypoxia-promotes-melanoma-lung-metastasis-via-oxidative-stress-and-inflammation-responses-in-a-mouse-model-of-obstructive-sleep-apnea
#15
Lian Li, Fangyuan Ren, Chao Qi, Leiqian Xu, Yinshan Fang, Maoli Liang, Jing Feng, Baoyuan Chen, Wen Ning, Jie Cao
BACKGROUND: Recently, increased tumor incidence and cancer-related mortality have been reported among patients with obstructive sleep apnea (OSA). Intermittent hypoxia (IH), the hallmark feature of OSA, contributes to the metastasis of tumors. However, the molecular mechanisms by which tumor metastasis is accelerated by OSA-like IH remain to be elucidated. METHODS: C57BL/6 J male mice were subjected to intravenous injection of B16F10 melanoma cells before receiving IH treatment...
February 12, 2018: Respiratory Research
https://www.readbyqxmd.com/read/29357521/intermittent-hypoxia-in-utero-damages-postnatal-growth-and-cardiovascular-function-in-rats
#16
Ling Chen, Zahra Heidari Zadi, Jin Zhang, Steven M Scharf, Eung-Kwon Pae
Obstructive sleep apnea (OSA) is common in pregnancy and may compromise fetal and even postnatal development. We developed an animal model to determine if maternal OSA could have lasting effects in offspring. Pregnant Sprague-Dawley rats were exposed to reduced ambient O2 from 21 to 4-5%, approximately once per minute [chronic intermittent hypoxia (CIH)] for 8 h/day during gestation days 3-19. Similarly handled animals exposed to ambient air served as controls (HC). Offspring were studied for body growth and cardiovascular function for 8 postnatal weeks...
April 1, 2018: Journal of Applied Physiology
https://www.readbyqxmd.com/read/29330970/gamma-glutamyl-transferase-activity-as-a-predictive-marker-for-severity-of-obstructive-sleep-apnea-syndrome-and-concomitant-hypertension
#17
Fulsen Bozkus, Nursel Dikmen, Lutfu Saltuk Demir
BACKGROUND: Chronic intermittent hypia, inflammation and oxidative stress are involved in resultant obstructive sleep apnea syndrome (OSAS), which may affect numerous regulatory mechanisms that play a role in the regulation of blood pressure. Gamma-glutamyl transferase (GGT) is a novel marker in the prediction of cardiovascular risk. OBJECTIVE: The objective of this study was to investigate the correlation of serum levels of GGT with hypertension and the degree of the upper airway obstruction in subjects with OSAS...
January 13, 2018: Clinical Respiratory Journal
https://www.readbyqxmd.com/read/29327118/effect-of-cpap-therapy-on-liver-disease-in-patients-with-osa-a-review
#18
REVIEW
Xin Liu, Yuyang Miao, Fan Wu, Tingting Du, Qiang Zhang
Obstructive sleep apnea (OSA) may play an important role in the progression of nonalcoholic fatty liver disease (NAFLD).The effect of continuous positive airway pressure (CPAP) treatment, the first-line therapy for OSA, on liver disease in OSA patients is still debated. We provide this review of previous studies to summarize the effects of CPAP treatment on liver disease in OSA patients in aspects of liver function, liver steatosis, fibrosis, and incidence of liver disease. CPAP treatment may be beneficial to liver disease in subjects with OSA independent of metabolic risk factors, but a sufficiently long therapeutic duration (perhaps greater than 3 months) may be needed to achieve these positive effects...
January 11, 2018: Sleep & Breathing, Schlaf & Atmung
https://www.readbyqxmd.com/read/29234143/risk-of-glomerular-filtration-rate-decline-in-patients-with-hypertrophic-cardiomyopathy-and-obstructive-sleep-apnoea
#19
Shao-Yun Wang, Jing Luo, Yi-Fei Dong, Xu-Yang Liu, Ying-Li Fan, Ming Deng, Da-Wei Chen, Ping Li, Xiao-Shu Cheng
Sleep apnoea is associated with chronic kidney diseases. A high obstructive sleep apnoea (OSA) prevalence is shown in patients with hypertrophic cardiomyopathy (HCM). Whether the presence of OSA would affect the renal function of patients with HCM is unknown. Forty-five consecutive patients with HCM were divided into the HCM OSA- and OSA+ groups. Forty-three patients with OSA without HCM were recruited as controls. Clinical indices, including estimated glomerular filtration rate (eGFR) and urine 8-hydroxy-2-deoxyguanosine (8-OHdG), were measured...
December 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29172922/thiol-disulfide-homeostasis-in-pregnant-women-with-obstructive-sleep-apnea-syndrome
#20
Yasemin Üstündağ, Hakan Demirci, Rifat Balık, Ozcan Erel, Fahri Özaydın, Bilgen Kücük, Dilber Ertaş, Emin Ustunyurt
BACKGROUND: Repetitive episodes of hypoxia and reoxygenation during sleep in patients with obstructive sleep apnea syndrome (OSAS) resemble an ischemia-reperfusion injury. We aimed to test the hypothesis that oxidative stress occurs in pregnant women with OSAS. We also aimed to compare thiol/disulfide homeostasis with ischemia-modified albumin (IMA) and total antioxidant capacity (TAC) as markers of ischemia-reperfusion injury in pregnant women with and without OSAS and healthy control...
November 27, 2017: Journal of Maternal-fetal & Neonatal Medicine
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