keyword
MENU ▼
Read by QxMD icon Read
search

OSA oxidative stress

keyword
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
#1
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
#2
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
#3
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
#4
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
#5
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
#6
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
#7
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
#8
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
#9
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
#10
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
https://www.readbyqxmd.com/read/29153412/role-of-lung-volume-and-airway-inflammation-in-obstructive-sleep-apnea
#11
REVIEW
Andras Bikov, Gyorgy Losonczy, Laszlo Kunos
Obstructive sleep apnea (OSA) is a prevalent disorder that affects not only the upper airways but also the intrathoracic airways. In this review, we summarize the results of studies on lung function and airway inflammation. We provide evidence that the alterations in intrathoracic airways observed in OSA are not purely consequences of mechanical trauma and oxidative stress during apneic events but have a causal role in the structural changes associated with OSA and increasing severity of this disorder.
November 2017: Respiratory Investigation
https://www.readbyqxmd.com/read/29114876/translating-carotid-body-function-into-clinical-medicine
#12
Rodrigo Iturriaga
The carotid body (CB) is considered the main O2 chemoreceptor, which contributes to the cardiorespiratory homeostasis and ventilatory acclimatization. In clinical medicine, the most common pathology associated with the CB are tumours. However, a growing body of evidences supports the novel idea that an enhanced CB chemosensory discharge contributes to the autonomic dysfunction and pathological consequences in obstructive sleep apnoea (OSA), hypertension, systolic heart failure (HF) and cardiometabolic diseases...
November 8, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/29107469/diseases-of-the-retina-and-the-optic-nerve-associated-with-obstructive-sleep-apnea
#13
REVIEW
Marielle Mentek, Florent Aptel, Diane Godin-Ribuot, Renaud Tamisier, Jean-Louis Pepin, Christophe Chiquet
Many associations between ocular disorders and obstructive sleep apnea (OSA) have been studied, such as nonarteritic anterior ischemic optic neuropathy, glaucoma, papilledema, retinal vein occlusion, eyelid hyperlaxity, lower-eyelid ectropion and recurrent corneal erosions. The objective of this review is to synthetize the possible vascular disorders of the retina and the optic nerve associated with sleep apnea patients and to discuss the underlying pathophysiological hypotheses. Main mechanisms involved in the ocular complications of OSA are related to intermittent hypoxia, sympathetic system activation, oxidant stress, and deleterious effects of endothelin 1...
April 2018: Sleep Medicine Reviews
https://www.readbyqxmd.com/read/29042934/intermittent-hypoxia-simulating-obstructive-sleep-apnea-causes-pulmonary-inflammation-and-activates-the-nrf2-ho-1-pathway
#14
Yeying Wang, Yanling Chai, Xiaojie He, Li Ai, Xia Sun, Yiling Huang, Yongxia Li
Obstructive sleep apnea (OSA) is a disorder with high morbidity in adults. OSA damages multiple organs and tissues, including the cardiovascular and cerebrovascular systems, the metabolism system, the lungs, liver and heart. OSA-induced damage is earliest and greatest to the pulmonary tissue. The present study established a rat OSA model of differing severity by inducing intermittent hypoxia with different concentrations of O2 and it was determined that OSA caused a severe oxidative stress response and pulmonary inflammation in a dose-dependent manner...
October 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29036393/angiotensin-receptor-expression-and-vascular-endothelial-dysfunction-in-obstructive-sleep-apnea
#15
Rami N Khayat, Saradhadevi Varadharaj, Kyle Porter, Angela Sow, David Jarjoura, Mikhail A Gavrilin, Jay L Zweier
Background: Obstructive sleep apnea (OSA) is associated with vascular endothelial dysfunction (VED) in otherwise healthy patients. The role of renin-angiotensin system (RAS) in the OSA induced VED is not well understood. Methods: Recently diagnosed OSA patients with very low cardiovascular disease (CVD) risk (Framingham score <5%) were studied at diagnosis and after 12 weeks of verified continuous positive airway pressure (CPAP) therapy. Participants underwent biopsy of gluteal subcutaneous tissue at baseline and after CPAP...
September 27, 2017: American Journal of Hypertension
https://www.readbyqxmd.com/read/28922718/tanshinone-iia-protects-against-chronic-intermittent-hypoxia-induced-myocardial-injury-via-activating-the-endothelin-1-pathway
#16
Na Wang, Yue Chang, Lingling Chen, Ya-Jing Guo, Ya-Shuo Zhao, Qiu-Hong Guo, En-Sheng Ji
Tanshinone IIA (Tan IIA) may exert significant protective effects against heart oxidative stress damage in obstructive sleep apnoea (OSA) syndrome. Chronic intermittent hypoxia (CIH)-triggered left ventricular dysfunction is used in a rat model to mimic CIH in OSA patients. 48 rats were randomly divided into three groups: normal control (NC) group, CIH group and CIH+Tan IIA group with 16 rats in each group. At the end of experiment (day 21), the blood pressure, Plasma ET-1 and NO content, hemodynamic indexes, heart histology, myocardial apoptosis as well as the expression of eNOS, ET-1, ETA receptor and ETB receptor were compared among different groups...
November 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28893651/obstructive-sleep-apnea-is-associated-with-altered-midbrain-chemical-concentrations
#17
Paul M Macey, Manoj K Sarma, Janani P Prasad, Jennifer A Ogren, Ravi Aysola, Ronald M Harper, M Albert Thomas
Obstructive sleep apnea (OSA) is accompanied by altered structure and function in cortical, limbic, brainstem, and cerebellar regions. The midbrain is relatively unexamined, but contains many integrative nuclei which mediate physiological functions that are disrupted in OSA. We therefore assessed the chemistry of the midbrain in OSA in this exploratory study. We used a recently developed accelerated 2D magnetic resonance spectroscopy (2D-MRS) technique, compressed sensing-based 4D echo-planar J-resolved spectroscopic imaging (4D-EP-JRESI), to measure metabolites in the midbrain of 14 OSA (mean age±SD:54...
November 5, 2017: Neuroscience
https://www.readbyqxmd.com/read/28871193/estradiol-regulates-txnip-and-prevents-intermittent-hypoxia-induced-vascular-injury
#18
Xiao Fei Lan, Xiu Juan Zhang, Ying Ni Lin, Qiong Wang, Hua Jun Xu, Li Na Zhou, Pei Li Chen, Qing Yun Li
Chronic intermittent hypoxia (IH) contributes to obstructive sleep apnea (OSA)-related cardiovascular diseases through increasing oxidative stress. It has been widely recognized that estradiol decreases the risk for cardiovascular disease, but the estrogen replacement therapy is limited for its side effects. Thioredoxin (Trx) and its endogenous inhibitor, thioredoxin-interacting protein (Txnip), are associated with the protective effect of estradiol in some conditions. In this study, we aimed to explore whether estradiol could protect against IH-induced vascular injury, and the possible effect of Trx-1/Txnip in this process...
September 4, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28822761/down-regulation-of-vascular-ppar-%C3%AE-contributes-to-endothelial-dysfunction-in-high-fat-diet-induced-obese-mice-exposed-to-chronic-intermittent-hypoxia
#19
Yanan Zhang, Chunlian Zhang, Haiou Li, Jingdong Hou
Obstructive sleep apnea (OSA), characterized by chronic intermittent hypoxia (CIH), is associated with endothelial dysfunction. The prevalence of OSA is linked to an epidemic of obesity. CIH has recently been reported to cause endothelial dysfunction in diet-induced obese animals by exaggerating oxidative stress and inflammation, but the underlying mechanism remains unclear. PPAR-γ, a ligand-inducible transcription factor that exerts anti-oxidant and anti-inflammatory effects, is down-regulated in the peripheral tissues in diet-induce obesity...
October 14, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28715063/peripheral-artery-atherosclerotic-disease-and-sleep-disordered-breathing-paradise-trial-protocol-for-an-observational-cohort-study
#20
Filip M Szymański, Zbigniew Gałązka, Anna E Płatek, Dariusz Górko, Tomasz Ostrowski, Karolina Adamkiewicz, Paweł Łęgosz, Anna Ryś, Karolina Semczuk-Kaczmarek, Krzysztof Celejewski, Krzysztof J Filipiak
BACKGROUND: Peripheral arterial disease (PAD) is in fact a group of disease entities with different symptoms and course but a common underlying cause, i.e. atherosclerosis. Atherosclerosis is known to be aggravated by several cardiovascular risk factors, including obstructive sleep apnoea (OSA). AIM: Following paper is a protocol for the Peripheral ARtery Atherosclerotic DIsease and SlEep disordered breathing (PARADISE) trial, which aims to describe the prevalence of OSA in PAD patients scheduled for revascularisation, and to determine the effect of OSA on the procedure outcomes...
2017: Kardiologia Polska
keyword
keyword
83963
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"