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OSA oxidative stress

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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
#1
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
#2
Ling Chen, Zahra Heidari Zadi, Jin Zhang, Steven M Scharf, Eung-Kwon Pae
PURPOSE: 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. METHODS: Pregnant Sprague Dawley rats were exposed to reduced ambient O2 from 21 to 4-5 %, approximately once/minute (chronic intermittent hypoxia - CIH) for 8 hours/day during gestation days 3-19. Similarly-handled animals exposed to ambient air served as controls (HC)...
December 14, 2017: 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
#3
Bozkus Fulsen
BACKGROUND: Chronic intermittent hypoxia, 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
#4
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
#5
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
#6
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
#7
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
#8
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
#9
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...
May 29, 2017: 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
#10
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
#11
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
#12
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
#13
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
#14
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
#15
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/peripehral-artery-atherosclerotic-disease-and-sleep-disordered-breathing-paradise-trial-protocol-for-an-observational-cohort-study
#16
Filip M Szymański, Zbigniew Gałązka, Anna E Płatek, Dariusz Górko, Tomasz Ostrowski, Karolina Adamkiewicz, Paweł Łęgosz, Anna Ryś, Karolina Semczuk, 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 that is atherosclerosis. Atherosclerosis is known to be aggravated by several cardiovascular risk factors, including obstructive sleep apnea (OSA). AIM: Following paper is a protocol for Peripehral ARtery Atherosclerotic DIsease and SlEep disordered breathing (PARADISE) trial, which aims to describe the prevalence of OSA in PAD patients scheduled for revascularization and to determine the effect of OSA on the procedure outcomes...
July 17, 2017: Kardiologia Polska
https://www.readbyqxmd.com/read/28659501/diet-and-exercise-in-the-management-of-obstructive-sleep-apnoea-and-cardiovascular-disease-risk
#17
REVIEW
Devon A Dobrosielski, Christopher Papandreou, Susheel P Patil, Jordi Salas-Salvadó
Obstructive sleep apnoea (OSA) is associated with increased cardiovascular disease (CVD) morbidity and mortality. It is accepted that OSA and obesity commonly coexist. The American Academy of Sleep Medicine recommends dietary-induced weight loss and exercise as lifestyle treatment options for OSA. However, most clinical trials upon which this recommendation is based have focused on establishing the effectiveness of calorie-restricted, often low-fat diets for improving OSA severity, whereas less attention has been given to the means through which weight loss is achieved (e...
June 30, 2017: European Respiratory Review: An Official Journal of the European Respiratory Society
https://www.readbyqxmd.com/read/28632190/soluble-pro-renin-receptor-and-obstructive-sleep-apnea-syndrome-oxidative-stress-in-brain
#18
REVIEW
Kazuhiro Takahashi, Koji Ohba, Kazuki Tajima, Tsuguo Nishijima, Shigeru Sakurai
(Pro)renin receptor ((P)RR) is a multi-functional molecule that is related to both the renin-angiotensin system (RAS) and vacuolar H⁺-ATPase (v-ATPase), an ATP-dependent multi-subunit proton pump. Soluble (P)RR (s(P)RR), which consists of the extracellular domain of (P)RR, is present in blood and urine. Elevated plasma s(P)RR concentrations are reported in patients with chronic kidney disease and pregnant women with hypertension or diabetes mellitus. In addition, we have shown that plasma s(P)RR concentrations are elevated in patients with obstructive sleep apnea syndrome (OSAS)...
June 20, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28623125/chronic-intermittent-hypoxia-induces-liver-fibrosis-in-mice-with-diet-induced-obesity-via-tlr4-myd88-mapk-nf-kb-signaling-pathways
#19
Hyeon Hui Kang, In Kyoung Kim, Hye In Lee, Hyonsoo Joo, Jeong Uk Lim, Jongmin Lee, Sang Haak Lee, Hwa Sik Moon
Obstructive sleep apnea (OSA) is associated with nonalcoholic fatty liver disease (NAFLD), and causes chronic intermittent hypoxia (CIH) during sleep. Inflammation is associated with the development of metabolic complications induced by CIH. Research suggests that innate immune mechanisms are involved in the pro-inflammatory pathways of liver fibrosis. The purpose of this study was to investigate whether innate immune responses induce liver fibrosis, and to evaluate mechanisms underlying hepatic inflammation related to CIH in a murine diet-induced obesity (DIO) model...
August 19, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28596432/obstructive-sleep-apnoea-and-related-comorbidities-in-incident-idiopathic-pulmonary-fibrosis
#20
Thomas Gille, Morgane Didier, Marouane Boubaya, Loris Moya, Angela Sutton, Zohra Carton, Fanny Baran-Marszak, Danielle Sadoun-Danino, Dominique Israël-Biet, Vincent Cottin, Frederic Gagnadoux, Bruno Crestani, Marie-Pia d'Ortho, Pierre-Yves Brillet, Dominique Valeyre, Hilario Nunes, Carole Planès
The objectives of this prospective study were: 1) to determine the prevalence and determinants of obstructive sleep apnoea (OSA) in patients with newly diagnosed idiopathic pulmonary fibrosis (IPF); 2) to determine whether OSA was associated with cardiovascular disease (CVD) as well as increased oxidative stress and levels of IPF biomarkers in the blood.A group of 45 patients with newly diagnosed IPF attended polysomnography. The prevalence of CVD and the severity of coronary artery calcification were investigated by high-resolution computed tomography...
June 2017: European Respiratory Journal: Official Journal of the European Society for Clinical Respiratory Physiology
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