keyword
MENU ▼
Read by QxMD icon Read
search

OSA oxidative stress

keyword
https://www.readbyqxmd.com/read/27896929/impact-of-inflammation-and-oxidative-stress-on-carotid-intima-media-thickness-in-obstructive-sleep-apnea-patients-without-metabolic-syndrome
#1
Ya-Ting Chang, Hsin-Ching Lin, Wen-Neng Chang, Nai-Wen Tsai, Chih-Cheng Huang, Hung-Chen Wang, Chia-Te Kung, Yu-Jih Su, Wei-Che Lin, Ben-Chung Cheng, Chih-Min Su, Ting-Yao Chen, Yi-Fang Chiang, Cheng-Hsien Lu
Obstructive sleep apnea (OSA) increases the risk of cardiovascular diseases, and carotid intima-media thickness (IMT) is a good indicator of the severity of atherosclerotic disease. This study tested the hypothesis that inflammation and oxidative stress determined carotid IMT in patients with OSA. The carotid IMT, mean systolic and diastolic pressure (night and morning) were significantly higher and the level of thiols and high-density lipoprotein were significantly lower in our 121 OSA patients than in 27 controls (P < 0...
November 28, 2016: Journal of Sleep Research
https://www.readbyqxmd.com/read/27876406/adenotonsillectomy-can-decrease-enuresis-and-sympathetic-nervous-activity-in-children-with-obstructive-sleep-apnea-syndrome
#2
Hao Ding, Mengmei Wang, Ke Hu, Jing Kang, Si Tang, Wen Lu, Lifang Xu
BACKGROUND: The nocturnal intermittent hypoxia caused by obstructive sleep apnea syndrome (OSAS) can provoke the sympathetic nervous activity (SNA). Salivary alpha-amylase (sAA) is a sensitive, non-invasive biomarker for reflecting the SNA, and a useful marker for pediatric OSAS subjects. Adenotonsillar hypertrophy (ATH) is the most commonly identified risk factor in OSAS childhood, therefore, several studies showed that the adenotonsillectomy (T&A) may alleviate nocturnal enuresis (NE) in children with OSAS...
November 9, 2016: Journal of Pediatric Urology
https://www.readbyqxmd.com/read/27864139/evening-morning-peroxiredoxin-2-redox-oligomeric-state-changes-in-obstructive-sleep-apnea-red-blood-cells-correlation-with-polysomnographic-and-metabolic-parameters
#3
Amélia Feliciano, Fátima Vaz, Vukosava M Torres, Cristina Valentim-Coelho, Rita Silva, Vesna Prosinecki, Bruno M Alexandre, Ana S Carvalho, Rune Matthiesen, Atul Malhotra, Paula Pinto, Cristina Bárbara, Deborah Penque
We have examined the effects of Obstructive Sleep Apnea (OSA) on red blood cell (RBC) proteome variation at evening/morning day time to uncover new insights into OSA-induced RBC dysfunction that may lead to OSA manifestations. Dysregulated proteins mainly fall in the group of catalytic enzymes, stress response and redox regulators such as peroxiredoxin 2 (PRDX2). Validation assays confirmed that at morning the monomeric/dimeric forms of PRDX2 were more overoxidized in OSA RBC compared to evening samples. Six month of positive airway pressure (PAP) treatment decreased this overoxidation and generated multimeric overoxidized forms associated with chaperone/transduction signaling activity of PRDX2...
November 15, 2016: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/27856716/relationship-between-obstructive-sleep-apnea-and-endogenous-carbon-monoxide
#4
Masanori Azuma, Kimihiko Murase, Ryo Tachikawa, Satoshi Hamada, Takeshi Matsumoto, Takuma Minami, Morito Inouchi, Kiminobu Tanizawa, Tomohiro Handa, Toru Oga, Michiaki Mishima, Kazuo Chin
Endogenous carbon monoxide (CO) levels are recognized as a surrogate marker for activity of heme oxygenase-1 (HO-1), which is induced by various factors including hypoxia and oxidative stress. Few reports have evaluated endogenous CO in patients with obstructive sleep apnea (OSA). Whether exhaled or blood CO is more reflected by OSA is not known. Sixty-nine patients with suspected OSA were prospectively included in this study. Exhaled and blood CO were evaluated at night and morning. Blood and exhaled CO levels were well correlated both at night and morning (r=0...
November 17, 2016: Journal of Applied Physiology
https://www.readbyqxmd.com/read/27843225/glaucoma-and-its-association-with-obstructive-sleep-apnea-a-narrative-review
#5
REVIEW
Aditya Chaitanya, Vijaya H Pai, Aswini Kumar Mohapatra, Ramesh S Ve
Obstructive sleep apnea (OSA) is one of the systemic risk factors for glaucoma which causes irreversible visual field (VF) damage. We reviewed the published data of all types of studies on the association between these two conditions and papers regarding functional and structural changes related to glaucomatous damage using Scopus, web of science, and PubMed databases. There is evidence that the prevalence of glaucoma is higher in OSA patients, which independent of intraocular pressure (IOP). Studies have reported thinning of retinal nerve fiber layer (RNFL), alteration of optic nerve head, choroidal and macular thickness, and reduced VF sensitivity in patients of OSA with no history glaucoma...
September 2016: Oman Journal of Ophthalmology
https://www.readbyqxmd.com/read/27800512/chronic-intermittent-hypoxia-and-obstructive-sleep-apnea-an-experimental-and-clinical-approach
#6
REVIEW
Emilia Sforza, Fréderic Roche
Obstructive sleep apnea (OSA) is a prevalent sleep disorder considered as an independent risk factor for cardiovascular consequences, such as systemic arterial hypertension, ischemic heart disease, cardiac arrhythmias, metabolic disorders, and cognitive dysfunction. The pathogenesis of OSA-related consequence is assumed to be chronic intermittent hypoxia (IH) inducing alterations at the molecular level, oxidative stress, persistent systemic inflammation, oxygen sensor activation, and increase of sympathetic activity...
2016: Hypoxia
https://www.readbyqxmd.com/read/27790155/exercise-attenuates-intermittent-hypoxia-induced-cardiac-fibrosis-associated-with-sodium-hydrogen-exchanger-1-in-rats
#7
Tsung-I Chen, Wei-Chia Tu
Purpose: To investigate the role of sodium-hydrogen exchanger-1 (NHE-1) and exercise training on intermittent hypoxia-induced cardiac fibrosis in obstructive sleep apnea (OSA), using an animal model mimicking the intermittent hypoxia of OSA. Methods: Eight-week-old male Sprague-Dawley rats were randomly assigned to control (CON), intermittent hypoxia (IH), exercise (EXE), or IH combined with exercise (IHEXE) groups. These groups were randomly assigned to subgroups receiving either a vehicle or the NHE-1 inhibitor cariporide...
2016: Frontiers in Physiology
https://www.readbyqxmd.com/read/27774119/role-of-oxidative-stress-in-the-neurocognitive-dysfunction-of-obstructive-sleep-apnea-syndrome
#8
Li Zhou, Ping Chen, Yating Peng, Ruoyun Ouyang
Obstructive sleep apnea syndrome (OSAS) is characterized by chronic nocturnal intermittent hypoxia and sleep fragmentations. Neurocognitive dysfunction, a significant and extraordinary complication of OSAS, influences patients' career, family, and social life and reduces quality of life to some extent. Previous researches revealed that repetitive hypoxia and reoxygenation caused mitochondria and endoplasmic reticulum dysfunction, overactivated NADPH oxidase, xanthine oxidase, and uncoupling nitric oxide synthase, induced an imbalance between prooxidants and antioxidants, and then got rise to a series of oxidative stress (OS) responses, such as protein oxidation, lipid peroxidation, and DNA oxidation along with inflammatory reaction...
2016: Oxidative Medicine and Cellular Longevity
https://www.readbyqxmd.com/read/27699083/oxidative-stress-induced-telomere-length-shortening-of-circulating-leukocyte-in-patients-with-obstructive-sleep-apnea
#9
Kyung Soo Kim, Jin Wook Kwak, Su Jin Lim, Yong Kyun Park, Hoon Shik Yang, Hyun Jik Kim
The main mechanism of pathogenesis which causes systemic complications in obstructive sleep apnea (OSA) patients is believed to be intermittent hypoxia-induced intermediary effect and it depends on the burden of oxidative stress during sleep. We aimed to search the predictive markers which reflect the burden of systemic oxidative stress in patients with OSA and whether excessive telomere length shortening is a characteristic feature that can assess oxidative stress levels. We used quantitative PCR to measure telomere length using peripheral blood genomic DNA...
October 2016: Aging and Disease
https://www.readbyqxmd.com/read/27693594/obstructive-sleep-apnea-and-cardiac-arrhythmogenesis-mechanistic-insights
#10
Anna M May, David R Van Wagoner, Reena Mehra
A surge of data has reproducibly identified strong associations of obstructive sleep apnea (OSA) with cardiac arrhythmias. As an extension of epidemiologic and clinic-based findings, experimental investigations have made strides in advancing our understanding of the putative OSA and cardiac arrhythmogenesis mechanistic underpinnings. While most studies have focused on the links between OSA and atrial fibrillation (AF), relationships with ventricular arrhythmias have also been characterized. Key findings implicate OSA-related autonomic nervous system fluctuations typified by enhanced parasympathetic activation during and sympathetic surges subsequent to respiratory events which contribute to augmented arrhythmic propensity...
September 29, 2016: Chest
https://www.readbyqxmd.com/read/27619033/a-novel-method-for-evaluation-of-oxidative-stress-in-children-with-osa
#11
Fatih Gul, Togay Muderris, Gokhan Yalciner, Halil Ibrahim Mise, Yagmur Canan, Mehmet Ali Babademez, Ozcan Erel
OBJECTIVES: To evaluate the role of adenotonsillar hypertrophy and the outcomes of adenotonsillectomy (AT) on oxidative stress for obstructive sleep apnea (OSA) in children using a new method; thiol/disulfide homeostasis. METHODS: The study is consisted of 45 children with OSA and 38 healthy control subjects with similar age and sex. Children 3-12 years of age with OSA, defined as having an apnea/hypopnea index (AHI) of 5 or more in an overnight polysomnography, underwent adenotonsillectomy...
October 2016: International Journal of Pediatric Otorhinolaryngology
https://www.readbyqxmd.com/read/27617449/vascular-endothelial-dysfunction-caused-by-oxidative-stress-is-a-predictor-factor-for-complications-of-obstructive-sleep-apnea-syndrome
#12
K Kilic, B Aktan, M Sedat-Sakat, A Kızıltunç, O Yoruk
Objective: Obstructive sleep apnea syndrome (OSAS) is characterized by repetitive episodes of upper airway obstruction that occur during sleep which leads to cardiovascular, neurovascular and metabolic diseases. The mechanisms of complications in these patients are unclear. In this report, we aimed to determine the cause of oxidative imbalance in patients with OSAS and to evaluate the vascular endothelial dysfunction as a suspect for complications of the disease. Materials and Methods: Fifty patients diagnosed as moderate or severe OSAS (AHI > 15) by polysomnography and 50 healthy volunteers are included in the study...
February 15, 2016: West Indian Medical Journal
https://www.readbyqxmd.com/read/27600660/serum-levels-of-magnesium-and-their-relationship-with-crp-in-patients-with-osa
#13
H Karamanli, D Kizilirmak, R Akgedik, M Bilgi
BACKGROUND: Low levels of magnesium (Mg) are associated with chronic inflammatory stress. Some animal studies have reported that a moderate deficiency of Mg, similar to that which occurs in humans, may increase inflammatory or oxidative stress stimulated by other factors, such as disrupted sleep or sleep deficiency. PURPOSE: This cross-sectional study evaluated the relationship between serum levels of Mg and the inflammatory response in patients with a new diagnosis of obstructive sleep apnea (OSA)...
September 6, 2016: Sleep & Breathing, Schlaf & Atmung
https://www.readbyqxmd.com/read/27542875/impact-of-obstructive-sleep-apnea-on-neurocognitive-function-and-impact-of-continuous-positive-air-pressure
#14
REVIEW
Charles R Davies, John J Harrington
There is evidence that obstructive sleep apnea (OSA) can negatively impact attention, memory, learning, executive function, and overall intellectual function in adults and children. Imaging techniques, including MRI, MR diffusion tensor imaging, MR spectroscopy, and fMRI, have provided additional insight into the anatomic and functional underpinnings of OSA-related cognitive impairment. Both animal and human studies have looked to elucidate the separate effects of oxygen desaturation and sleep fragmentation on independent aspects of cognition...
September 2016: Sleep Medicine Clinics
https://www.readbyqxmd.com/read/27542874/consequences-of-obstructive-sleep-apnea-cardiovascular-risk-of-obstructive-sleep-apnea-and-whether-continuous-positive-airway-pressure-reduces-that-risk
#15
REVIEW
Rami Khayat, Adam Pleister
Obstructive sleep apnea (OSA) is present in up to 25% of otherwise healthy individuals. OSA is associated with intermittent hypoxia, oxidative stress, sympathetic activation, and an inflammatory response. These perturbations mediate the role of OSA as an independent and modifiable risk factor for cardiovascular disease (CVD). OSA can induce CVD or accelerate the progression of CVD into an end-stage disorder, including heart failure and stroke. Current clinical recommendations are based on existing clinical trial data and the clinical experience of our program; current and future clinical trials will help to optimize management of OSA in the setting of CVD...
September 2016: Sleep Medicine Clinics
https://www.readbyqxmd.com/read/27524971/a-novel-chip-for-cyclic-stretch-and-intermittent-hypoxia-cell-exposures-mimicking-obstructive-sleep-apnea
#16
Noelia Campillo, Ignasi Jorba, Laura Schaedel, Blai Casals, David Gozal, Ramon Farré, Isaac Almendros, Daniel Navajas
Intermittent hypoxia (IH), a hallmark of obstructive sleep apnea (OSA), plays a critical role in the pathogenesis of OSA-associated morbidities, especially in the cardiovascular and respiratory systems. Oxidative stress and inflammation induced by IH are suggested as main contributors of end-organ dysfunction in OSA patients and animal models. Since the molecular mechanisms underlying these in vivo pathological responses remain poorly understood, implementation of experimental in vitro cell-based systems capable of inducing high-frequency IH would be highly desirable...
2016: Frontiers in Physiology
https://www.readbyqxmd.com/read/27502204/obstructive-sleep-apnea-is-associated-with-visit-to-visit-variability-in-low-density-lipoprotein-cholesterol-in-patients-with-coronary-artery-disease
#17
Gavin Ng, Elaine Boey, Chris Frampton, Arthur Mark Richards, Tiong-Cheng Yeo, Chi-Hang Lee
PURPOSE: Visit-to-visit variability in low-density lipoprotein-cholesterol (LDL-C) was found to be a novel predictor of adverse cardiac events. Obstructive sleep apnea (OSA), an emerging cardiovascular risk factor, is characterized by sympathetic activation and increased oxidative stress which are regulators of LDL-C metabolism. We hypothesized that OSA was associated with LDL-C variability. METHODS: We prospectively recruited 190 patients with coronary artery disease for an overnight sleep study...
August 8, 2016: Sleep & Breathing, Schlaf & Atmung
https://www.readbyqxmd.com/read/27501738/nocturnal-hypoxia-induced-oxidative-stress-promotes-progression-of-pediatric-non-alcoholic-fatty-liver-disease
#18
Shikha S Sundaram, Ann Halbower, Zhaoxing Pan, Kristen Robbins, Kelley E Capocelli, Jelena Klawitter, Colin T Shearn, Ronald J Sokol
BACKGROUND & AIMS: Oxidative stress is proposed as a central mediator in NAFLD pathogenesis, but the specific trigger for reactive oxygen species generation has not been clearly delineated. In addition, emerging evidence shows that obesity related obstructive sleep apnea (OSA) and nocturnal hypoxia are associated with NAFLD progression in adults. The aim of this study was to determine if OSA/nocturnal hypoxia-induced oxidative stress promotes the progression of pediatric NAFLD. METHODS: Subjects with biopsy proven NAFLD and lean controls were studied...
September 2016: Journal of Hepatology
https://www.readbyqxmd.com/read/27478683/sleep-disorders-and-cardio-renal-disease-implications-for-minority-populations
#19
Judith Giunta, Moro O Salifu, Samy I McFarlane
Obesity is a major public health problem that is reaching pandemic proportion. Currently two thirds of the American population is either overweight or obese and worldwide, 39% of the population is overweight and 13% are considered obese [1,2]. This rapid rise in obesity is associated with increased in diabetes mellitus type 2 (DM2), hypertension (HTN), chronic kidney disease (CKD) and cardiovascular diseases (CVD), the major killer of adults in the USA. Parallel to this epidemic is the rapid rise of sleep disorders such as Obstructive Sleep Apnea (OSA)...
2016: Epidemiology: Current Research
https://www.readbyqxmd.com/read/27445853/inflammatory-role-of-ros-sensitive-amp-activated-protein-kinase-in-the-hypersensitivity-of-lung-vagal-c-fibers-induced-by-intermittent-hypoxia-in-rats
#20
Chang-Huan Yang, Yan-Jhih Shen, Ching Jung Lai, Yu Ru Kou
Obstructive sleep apnea (OSA), manifested by airway exposure to intermittent hypoxia (IH), is associated with excess reactive oxygen species (ROS) production in airways, airway inflammation, and hyperreactive airway diseases. The cause-effect relationship for these events remains unclear. We investigated the inflammatory role of ROS-sensitive AMP-activated protein kinase (AMPK) in IH-induced airway hypersensitivity mediated by lung vagal C fibers (LVCFs) in rats. Conscious rats were exposed to room air (RA) or IH with or without treatment with N-acetyl-L-cysteine (NAC, an antioxidant), Compound C (an AMPK inhibitor), ibuprofen (a cyclooxygenase inhibitor), or their vehicles...
2016: Frontiers in Physiology
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"