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Nathani A, Attaway A, Mehra R. Hypoxic and Autonomic Mechanisms from Sleep-Disordered Breathing Leading to Cardiopulmonary Dysfunction. Sleep Med Clin 2024; 19:229-237. [PMID: 38692748 DOI: 10.1016/j.jsmc.2024.02.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/03/2024]
Abstract
Obstructive sleep apnea (OSA) is a common sleep-related breathing disorder. Its prevalence has increased due to increasing obesity and improved screening and diagnostic strategies. OSA overlaps with cardiopulmonary diseases to promote intermittent hypoxia and autonomic dysfunction. Intermittent hypoxia increases the risk for oxidative stress and inflammation, which promotes endothelial dysfunction and predisposes to atherosclerosis and other cardiovascular complications. OSA is associated with an increased sympathetic nervous system drive resulting in autonomic dysfunction leading to worsening of cardiopulmonary diseases. Cardiovascular diseases are observed in 40% to 80% of OSA patients. Therefore, it is essential to screen and treat cardiovascular diseases.
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Affiliation(s)
- Avantika Nathani
- Respiratory Institute, Cleveland Clinic, 9500 Euclid Avenue A90, Cleveland, OH 44195, USA.
| | - Amy Attaway
- Respiratory Institute, Cleveland Clinic, 9500 Euclid Avenue A90, Cleveland, OH 44195, USA
| | - Reena Mehra
- Respiratory Institute, Cleveland Clinic, 9500 Euclid Avenue A90, Cleveland, OH 44195, USA; Heart, Vascular and Thoracic Institute, Cleveland Clinic, Cleveland, OH, USA; Neurological Institute, Cleveland Clinic, Cleveland, OH, USA
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Zhang JT, Cui S, Li Q, Li JR, Zhang YF, Zheng YH. Sleep-disordered breathing is related to retinal vein occlusion: A meta-analysis. Medicine (Baltimore) 2023; 102:e35411. [PMID: 37832067 PMCID: PMC10578690 DOI: 10.1097/md.0000000000035411] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Accepted: 09/05/2023] [Indexed: 10/15/2023] Open
Abstract
BACKGROUND Previous studies suggest that sleep-disordered breathing (SDB) may be a potential risk factor of retinal vein occlusion (RVO). We conducted a meta-analysis to systematically explore the relationship between RVO and SDB. METHODS Observational studies assessing the relationship between SDB and RVO were retrieved by searches of electronic databases including the PubMed, Embase, Web of Science, China National Knowledge Infrastructure, and Wan Fang databases from database inception to August 9, 2023. In consideration of intra-study heterogeneity, a random-effects model was adopted to combine the results. RESULTS Seven studies (1 retrospective cohort and 6 case-control studies) were included in this meta-analysis, and among 36,628 adults included in those studies, 6452 (17.6%) had SDB. The combined results indicated that SDB was associated with RVO [risk ratio (RR): 1.92, 95% confidence interval (CI): 1.60-2.30, P < .001] with no significant heterogeneity (I2 = 0%). Subgroup analyses showed consistent relationships between SDB and any RVO (RR: 1.73, 95% CI: 1.13-2.28, P < .001), central RVO (RR: 2.20, 95% CI: 1.57-3.08, P < .001), and branch RVO (RR: 1.85, 95% CI: 1.15-2.99, P = .01). Moreover, the relationship was consistent among patients with mild (RR: 1.82, 95% CI: 1.32-2.53, P < .001), moderate (RR: 2.17, 95% CI: 1.65-2.85, P < .001), and severe SDB (RR: 2.66, 95% CI: 1.96-3.62, P < .001). The association was consistent in studies that adjusted for age and sex (RR: 2.17, 95% CI: 1.50-3.13, P < .001), and in studies with additional adjustment for comorbidities (RR: 1.78, 95% CI: 1.42-2.25, P < .001). CONCLUSION SDB is associated with RVO in adults.
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Affiliation(s)
- Jun-Tao Zhang
- Department Ophthalmology, Xiangyang Central Hospital, Affiliated Hospital of Hubei University of Arts and Science, Xiangyang, China
| | - Sha Cui
- Department Ophthalmology, Xiangyang Central Hospital, Affiliated Hospital of Hubei University of Arts and Science, Xiangyang, China
| | - Qin Li
- Department Ophthalmology, Xiangyang Central Hospital, Affiliated Hospital of Hubei University of Arts and Science, Xiangyang, China
| | - Jin-Rong Li
- Department Ophthalmology, Xiangyang Central Hospital, Affiliated Hospital of Hubei University of Arts and Science, Xiangyang, China
| | - Yan-Fang Zhang
- Department Ophthalmology, Xiangyang Central Hospital, Affiliated Hospital of Hubei University of Arts and Science, Xiangyang, China
| | - Yan-Huang Zheng
- Department Ophthalmology, Xiangyang Central Hospital, Affiliated Hospital of Hubei University of Arts and Science, Xiangyang, China
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Zhang L, Zhang X, Li YM, Xiang BY, Han T, Wang Y, Wang C. Association of Craniofacial and Upper Airway Morphology with Cardiovascular Risk in Adults with OSA. Nat Sci Sleep 2021; 13:1689-1700. [PMID: 34629918 PMCID: PMC8493274 DOI: 10.2147/nss.s332117] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/05/2021] [Accepted: 09/20/2021] [Indexed: 01/01/2023] Open
Abstract
BACKGROUND AND OBJECTIVE Clinical and population-based studies have demonstrated a strong association between obstructive sleep apnea (OSA) and cardiovascular disease (CVD). Anatomical abnormalities of the craniofacial region and upper airway are important risk factors for OSA. The objective of this study was to investigate the association of craniofacial and upper airway morphology with CVD risk biomarkers. METHODS One hundred and sixty-nine male patients with OSA underwent in-laboratory polysomnography (PSG) and upper airway computed tomography (CT) scanning. Ten-year Framingham CVD risk score (FRS) was calculated and categorized into low- and moderate-to-high-risk groups. N-terminal pro B-type natriuretic peptide (NT-proBNP) was measured as a biomarker of increased myocardial wall stress. RESULTS Compared to the low-risk group, total sleep time (TST), the proportion of N3 (N3%) and mean oxygen saturation (SpO2mean) were lower, while the arousal index of non-rapid eye movement (NREM) sleep, apnea index (AI) of NREM sleep, apnea hypopnea index (AHI) of NREM sleep, oxygen desaturation index (ODI) and percentage of total sleep time spent with oxyhemoglobin saturation below 90% (TST90) were higher in the moderate-to-high risk group. The corrected upper airway length (UAL), ANB angle and gonion-gnathion-hyoid angle were larger for subjects in the moderate-to-high risk group than those in the low-risk group. In multiple regression analysis, TST, AINREM and adjusted UAL were independently associated with moderate-to-high CVD risk. Plasma NT-proBNP levels were higher in patients in the moderate- to high-risk group, and among the PSG and CT scan parameters, only SPO2mean was marginally associated with NT-proBNP (r=0.183, P=0.054). CONCLUSION Craniofacial and upper airway features may contain valid cues about CVD risk, and sleep duration, obstructive event type and occurrence phase may be closely related to CVD risk for patients with OSA.
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Affiliation(s)
- Li Zhang
- Department of Pulmonary and Critical Care Medicine, Center of Respiratory Medicine, China-Japan Friendship Hospital, Beijing, People's Republic of China
- National Clinical Research Center for Respiratory Diseases, Beijing, People's Republic of China
- Peking University Health Science Center, Beijing, People's Republic of China
| | - Xiaolei Zhang
- Department of Pulmonary and Critical Care Medicine, Center of Respiratory Medicine, China-Japan Friendship Hospital, Beijing, People's Republic of China
- National Clinical Research Center for Respiratory Diseases, Beijing, People's Republic of China
- Peking University Health Science Center, Beijing, People's Republic of China
- Capital Medical University, Beijing, People's Republic of China
- The Graduate School of Peking Union Medical College, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, People's Republic of China
| | - Yi Ming Li
- Department of Pulmonary and Critical Care Medicine, Center of Respiratory Medicine, China-Japan Friendship Hospital, Beijing, People's Republic of China
- National Clinical Research Center for Respiratory Diseases, Beijing, People's Republic of China
| | - Bo Yun Xiang
- Department of Pulmonary and Critical Care Medicine, Center of Respiratory Medicine, China-Japan Friendship Hospital, Beijing, People's Republic of China
- National Clinical Research Center for Respiratory Diseases, Beijing, People's Republic of China
| | - Teng Han
- Department of Pulmonary and Critical Care Medicine, Center of Respiratory Medicine, China-Japan Friendship Hospital, Beijing, People's Republic of China
- National Clinical Research Center for Respiratory Diseases, Beijing, People's Republic of China
| | - Yan Wang
- Department of Pulmonary and Critical Care Medicine, Center of Respiratory Medicine, China-Japan Friendship Hospital, Beijing, People's Republic of China
- National Clinical Research Center for Respiratory Diseases, Beijing, People's Republic of China
| | - Chen Wang
- Department of Pulmonary and Critical Care Medicine, Center of Respiratory Medicine, China-Japan Friendship Hospital, Beijing, People's Republic of China
- National Clinical Research Center for Respiratory Diseases, Beijing, People's Republic of China
- Peking University Health Science Center, Beijing, People's Republic of China
- Capital Medical University, Beijing, People's Republic of China
- The Graduate School of Peking Union Medical College, Chinese Academy of Medical Science and Peking Union Medical College, Beijing, People's Republic of China
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Zolotoff C, Bertoletti L, Gozal D, Mismetti V, Flandrin P, Roche F, Perek N. Obstructive Sleep Apnea, Hypercoagulability, and the Blood-Brain Barrier. J Clin Med 2021; 10:jcm10143099. [PMID: 34300265 PMCID: PMC8304023 DOI: 10.3390/jcm10143099] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2021] [Revised: 07/05/2021] [Accepted: 07/08/2021] [Indexed: 02/07/2023] Open
Abstract
Obstructive sleep apnea (OSA) is characterized by repeated episodes of intermittent hypoxia (IH) and is recognized as an independent risk factor for vascular diseases that are mediated by a multitude of mechanistic pathophysiological cascades including procoagulant factors. The pro-coagulant state contributes to the development of blood clots and to the increase in the permeability of the blood-brain barrier (BBB). Such alteration of BBB may alter brain function and increase the risk of neurodegenerative diseases. We aim to provide a narrative review of the relationship between the hypercoagulable state, observed in OSA and characterized by increased coagulation factor activity, as well as platelet activation, and the underlying neural dysfunction, as related to disruption of the BBB. We aim to provide a critical overview of the existing evidence about the effect of OSA on the coagulation balance (characterized by increased coagulation factor activity and platelet activation) as on the BBB. Then, we will present the emerging data on the effect of BBB disruption on the risk of underlying neural dysfunction. Finally, we will discuss the potential of OSA therapy on the coagulation balance and the improvement of BBB.
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Affiliation(s)
- Cindy Zolotoff
- U1059, Sainbiose, Dysfonction Vasculaire et Hémostase, Université de Lyon, Université Jean Monnet Saint-Étienne, F-42270 Saint-Priest-en-Jarez, France; (L.B.); (F.R.); (N.P.)
- Correspondence: ; Tel.: +33-477-421-452
| | - Laurent Bertoletti
- U1059, Sainbiose, Dysfonction Vasculaire et Hémostase, Université de Lyon, Université Jean Monnet Saint-Étienne, F-42270 Saint-Priest-en-Jarez, France; (L.B.); (F.R.); (N.P.)
- Service de Médecine Vasculaire et Thérapeutique, CHU Saint-Étienne, F-42270 Saint-Priest-en-Jarez, France
| | - David Gozal
- Department of Child Health and the Child Health Research Institute, MU Women’s and Children’s Hospital, University of Missouri, Columbia, MO 65201, USA;
| | - Valentine Mismetti
- Service de Pneumologie et d’Oncologie Thoracique, CHU Saint-Étienne, F-42270 Saint-Priest-en-Jarez, France;
| | - Pascale Flandrin
- Laboratoire d’Hématologie, Hôpital Nord, CHU Saint-Étienne, F-42270 Saint-Priest-en-Jarez, France;
| | - Frédéric Roche
- U1059, Sainbiose, Dysfonction Vasculaire et Hémostase, Université de Lyon, Université Jean Monnet Saint-Étienne, F-42270 Saint-Priest-en-Jarez, France; (L.B.); (F.R.); (N.P.)
- Service de Physiologie Clinique et de l’Exercice, Centre VISAS, CHU Saint Etienne, F-42270 Saint-Priest-en-Jarez, France
| | - Nathalie Perek
- U1059, Sainbiose, Dysfonction Vasculaire et Hémostase, Université de Lyon, Université Jean Monnet Saint-Étienne, F-42270 Saint-Priest-en-Jarez, France; (L.B.); (F.R.); (N.P.)
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Sex-Specific Differential Responses of Circulating Biomarkers in Obstructive Sleep Apnea Treatment. A Post Hoc Analysis of a Randomized Controlled Trial. Ann Am Thorac Soc 2021; 17:605-613. [PMID: 31860326 DOI: 10.1513/annalsats.201908-593oc] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Rationale: Knowledge of sex-specific changes of cardiovascular biomarkers in response to continuous positive airway pressure (CPAP) therapy for obstructive sleep apnea (OSA) is limited.Objectives: We hypothesized a differential sex-specific cardiovascular biomarker response with CPAP therapy for OSA.Methods: Participants with moderate-severe OSA (apnea-hypopnea index, 15 events/h) were randomized to CPAP versus sham and completed polysomnography and collection of biomarkers of inflammation (myeloperoxidase, fibrinogen, paraoxonase, interleukin [IL]-6, IL-6 soluble receptor, aryl esterase, oxidized low-density lipoprotein, lipoprotein A, plasminogen activator inhibitor 1, and F2-isoprostane urine/creatinine ratio) and vascular measures at baseline and 8 weeks of therapy with either CPAP (n = 72) or sham treatment (n = 70). Post hoc secondary analyses of sex-study arm interaction relative to change in inflammatory biomarkers were evaluated via linear regression with adjustment for baseline biomarker value, age, race, body mass, index, waist circumference, and CPAP adherence. Interactions were further evaluated via sex-stratified analyses.Results: The study sample comprised a total of 149 participants aged 50.8 ± 11.7 years; 55% were male, and 55% were white. Participants had a median apnea-hypopnea index of 26.3 events per hour (interquartile range, 13-37). There were substantial interactions between study arm and sex for myeloperoxidase, paraoxonase, and fibrinogen (P = 0.03, P = 0.03, and P = 0.08, respectively). No significant interactions were found for the vascular measures. Estimates were similar but with decreased power in sex-stratified analyses, with decreased biomarkers in women and increased biomarkers in men.Conclusions: Differential sex-specific responses to CPAP therapy for OSA were observed for circulating inflammatory biomarkers, which persisted after adjustment for confounders. These findings set the stage for validation studies and, if confirmed, biochemical pathway elucidation to inform sex-specific personalized treatment approaches.Clinical trial registered with www.clinicaltrials.gov (NCT00607893).
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Bikov A, Meszaros M, Schwarz EI. Coagulation and Fibrinolysis in Obstructive Sleep Apnoea. Int J Mol Sci 2021; 22:ijms22062834. [PMID: 33799528 PMCID: PMC8000922 DOI: 10.3390/ijms22062834] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2021] [Revised: 03/07/2021] [Accepted: 03/08/2021] [Indexed: 12/29/2022] Open
Abstract
Obstructive sleep apnoea (OSA) is a common disease which is characterised by repetitive collapse of the upper airways during sleep resulting in chronic intermittent hypoxaemia and frequent microarousals, consequently leading to sympathetic overflow, enhanced oxidative stress, systemic inflammation, and metabolic disturbances. OSA is associated with increased risk for cardiovascular morbidity and mortality, and accelerated coagulation, platelet activation, and impaired fibrinolysis serve the link between OSA and cardiovascular disease. In this article we briefly describe physiological coagulation and fibrinolysis focusing on processes which could be altered in OSA. Then, we discuss how OSA-associated disturbances, such as hypoxaemia, sympathetic system activation, and systemic inflammation, affect these processes. Finally, we critically review the literature on OSA-related changes in markers of coagulation and fibrinolysis, discuss potential reasons for discrepancies, and comment on the clinical implications and future research needs.
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Affiliation(s)
- Andras Bikov
- North West Lung Centre, Manchester University NHS Foundation Trust, Manchester M23 9LT, UK
- Division of Infection, Immunity and Respiratory Medicine, University of Manchester, Manchester M13 9MT, UK
- Correspondence: ; Tel.: +44-161-291-2493; Fax: +44-161-291-5730
| | - Martina Meszaros
- Department of Pulmonology, Semmelweis University, 1083 Budapest, Hungary;
- Department of Pulmonology and Sleep Disorders Centre, University Hospital Zurich, 8006 Zurich, Switzerland;
| | - Esther Irene Schwarz
- Department of Pulmonology and Sleep Disorders Centre, University Hospital Zurich, 8006 Zurich, Switzerland;
- Centre of Competence Sleep & Health Zurich, University of Zurich, 8091 Zurich, Switzerland
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Deokar K, Meshram S, Chawla G, Kunjir N, Meshram C, Abrol N, Gaikwad P. Obstructive sleep apnea, intermittent hypoxemia and prothrombotic biomarkers. SLEEP SCIENCE (SAO PAULO, BRAZIL) 2021; 13:230-234. [PMID: 33564369 PMCID: PMC7856672 DOI: 10.5935/1984-0063.20190147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Objective To study the serum levels of fibrinogen and d-dimer in patients with obstructive sleep apnea (OSA) and its correlation with apnea hypopnea index (AHI), oxygen desaturation index (ODI), minimal oxygen saturation and arousal index. Methods It was a case control study in which 23 cases of OSA and 23 controls were enrolled. Morning fasting serum fibrinogen and d-dimer were measured in cases of OSA and controls. Results Serum fibrinogen levels among OSA patients (268.47±53.11mg/dl) were elevated as compared to the levels in controls (221.52±65.84mg/dl) (p<0.05). Serum fibrinogen co-related positively with AHI (r=0.6381, p=0.0011) and ODI (r=0.7434, p=0.0000), negatively with minimal oxygen saturation (r=-0.4461, p=0.0329). There was no statistically significant correlation of fibrinogen with arousal index (r=0.2697, p=0.2133). There was no statistically significant difference between mean fasting d-dimer level in cases (0.12mg/L, 0.06±0.18mg/L) and controls (0.12mg/L, 0.02±0.22mg/L) (p=0.8926). Conclusions The observation of elevated fibrinogen levels with the increasing severity of OSA and hypoxemic events makes OSA one of the important risk factor for cardiovascular disorders.
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Affiliation(s)
- Kunal Deokar
- Government medical college, Pulmonary Medicine - Nagpur - Maharashtra - India
| | - Sushant Meshram
- Government medical college, Pulmonary Medicine - Nagpur - Maharashtra - India
| | - Gopal Chawla
- All India Institute of Medical Sciences, Pulmonary Medicine and Sleep Disorders - New Delhi - Delhi - India
| | - Nana Kunjir
- Government medical college, Pulmonary Medicine - Nagpur - Maharashtra - India
| | - Chetna Meshram
- Government medical college, Pharmacology - Nagpur - Maharashtra - India
| | - Nupur Abrol
- All India Institute of Medical Sciences, Anaesthesia - Delhi - Delhi - India
| | - Priyanka Gaikwad
- Bhaktivedanta hospital, Paediatrics - Mumbai - Maharashtra - India
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Wang F, Liu Y, Xu H, Qian Y, Zou J, Yi H, Guan J, Yin S. Association between Upper-airway Surgery and Ameliorative Risk Markers of Endothelial Function in Obstructive Sleep Apnea. Sci Rep 2019; 9:20157. [PMID: 31882827 PMCID: PMC6934655 DOI: 10.1038/s41598-019-56601-w] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2019] [Accepted: 12/13/2019] [Indexed: 12/01/2022] Open
Abstract
The objective of our study was to evaluate the effects of upper-airway surgery on improvement of endothelial function-related markers in patients with obstructive sleep apnea (OSA). Subjects with moderate to severe OSA who underwent upper-airway surgery, with a follow-up duration of at least 6 months, were included. Pre- and postoperative polysomnographic variables and endothelial function-related markers were compared. Subgroup and correlation analyses were conducted to find possible indicators for better endothelial function-related markers after upper-airway surgery. In total, 44 patients with OSA were included. The mean follow-up duration was 1.72 ± 0.92 years. Serum VEGFA [-20.29 (CI: -35.27, -5.31), p < 0.05], Ang2 [-0.06 (CI: -0.16, 0.03), p < 0.05], E-selectin [-7.21 (CI: -11.01, -3.41), p < 0.001], VWF [-58.83 (CI: -103.93, -13.73), p < 0.05], VWFCP [-33.52 (CI: -66.34, -0.70), p < 0.05], and TM [-0.06 (CI: -0.09, -0.03), p < 0.05] were significantly lower after upper-airway surgery. However, other risk markers of endothelial function, such as Ang1, ICAM1, VEGFR1, and VCAM, did not change significantly. Correlations between improved endothelial function-related markers and ameliorated oxyhemoglobin saturation and glucolipid metabolism were established. Upper-airway surgery might be associated with an improvement in endothelial function in patients with OSA. These changes may be associated with improved oxygen saturation after upper-airway surgery.
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Affiliation(s)
- Fan Wang
- Department of Otolaryngology Head and Neck Surgery & Center of Sleep Medicine, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Yishan Road 600, Shanghai, 200233, China
- Shanghai Key Laboratory of Sleep Disordered Breathing, Yishan Road 600, Shanghai, 200233, China
| | - Yuenan Liu
- Department of Otolaryngology Head and Neck Surgery & Center of Sleep Medicine, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Yishan Road 600, Shanghai, 200233, China
- Shanghai Key Laboratory of Sleep Disordered Breathing, Yishan Road 600, Shanghai, 200233, China
| | - Huajun Xu
- Department of Otolaryngology Head and Neck Surgery & Center of Sleep Medicine, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Yishan Road 600, Shanghai, 200233, China.
- Shanghai Key Laboratory of Sleep Disordered Breathing, Yishan Road 600, Shanghai, 200233, China.
- Clinical Research Center, Shanghai Jiao Tong University School of Medicine, South Chongqing Road 225, 200020, Shanghai, China.
| | - Yingjun Qian
- Department of Otolaryngology Head and Neck Surgery & Center of Sleep Medicine, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Yishan Road 600, Shanghai, 200233, China
- Shanghai Key Laboratory of Sleep Disordered Breathing, Yishan Road 600, Shanghai, 200233, China
- Clinical Research Center, Shanghai Jiao Tong University School of Medicine, South Chongqing Road 225, 200020, Shanghai, China
| | - Jianyin Zou
- Department of Otolaryngology Head and Neck Surgery & Center of Sleep Medicine, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Yishan Road 600, Shanghai, 200233, China.
- Shanghai Key Laboratory of Sleep Disordered Breathing, Yishan Road 600, Shanghai, 200233, China.
- Clinical Research Center, Shanghai Jiao Tong University School of Medicine, South Chongqing Road 225, 200020, Shanghai, China.
| | - Hongliang Yi
- Department of Otolaryngology Head and Neck Surgery & Center of Sleep Medicine, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Yishan Road 600, Shanghai, 200233, China
- Shanghai Key Laboratory of Sleep Disordered Breathing, Yishan Road 600, Shanghai, 200233, China
- Clinical Research Center, Shanghai Jiao Tong University School of Medicine, South Chongqing Road 225, 200020, Shanghai, China
| | - Jian Guan
- Department of Otolaryngology Head and Neck Surgery & Center of Sleep Medicine, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Yishan Road 600, Shanghai, 200233, China
- Shanghai Key Laboratory of Sleep Disordered Breathing, Yishan Road 600, Shanghai, 200233, China
- Clinical Research Center, Shanghai Jiao Tong University School of Medicine, South Chongqing Road 225, 200020, Shanghai, China
| | - Shankai Yin
- Department of Otolaryngology Head and Neck Surgery & Center of Sleep Medicine, Shanghai Jiao Tong University Affiliated Sixth People's Hospital, Yishan Road 600, Shanghai, 200233, China
- Shanghai Key Laboratory of Sleep Disordered Breathing, Yishan Road 600, Shanghai, 200233, China
- Clinical Research Center, Shanghai Jiao Tong University School of Medicine, South Chongqing Road 225, 200020, Shanghai, China
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Obstructive sleep apnea and venous thromboembolism: Overview of an emerging relationship. Sleep Med Rev 2019; 50:101233. [PMID: 31838272 DOI: 10.1016/j.smrv.2019.101233] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2018] [Revised: 11/05/2019] [Accepted: 11/06/2019] [Indexed: 12/16/2022]
Abstract
Obstructive sleep apnea (OSA) is a risk factor for cardiovascular syndromes. Venous thromboembolism (VTE) is a chronic disease, and pulmonary embolism (PE) is the major expression of VTE and the third most frequent cardiovascular disease. An increasing and emerging number of cross-sectional and longitudinal studies have linked OSA to VTE, and have postulated different putative pathways to explain how OSA might increase the risk of PE. We aim to provide a critical overview of the existing evidence about the complex relationship between these two conditions, with some factors and confounding variables still to be clarified. A global interpretation of the studies shows OSA is highly prevalent in VTE patients. This association represents a major public health burden, given the high prevalence and the mortality rates of both disorders. Although still not proven, OSA may induce a persistent hypercoagulable state that may contribute to increase VTE rate and its recurrence. Coagulant activity, platelet function and fibrinolytic system may improve after continuous positive airway pressure (CPAP) in OSA. However, there is a still a lack of randomized controlled trials to evaluate the potential of CPAP and/or extend oral anticoagulation to reduce PE incidence, recurrence and mortality by PE in patients with OSA.
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von Känel R, Princip M, Schmid JP, Barth J, Znoj H, Schnyder U, Meister-Langraf RE. Association of sleep problems with neuroendocrine hormones and coagulation factors in patients with acute myocardial infarction. BMC Cardiovasc Disord 2018; 18:213. [PMID: 30463526 PMCID: PMC6249741 DOI: 10.1186/s12872-018-0947-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2018] [Accepted: 11/01/2018] [Indexed: 12/14/2022] Open
Abstract
Background Obstructive sleep apnea (OSA) and insomnia are frequent sleep problems that are associated with poor prognosis in patients with coronary heart disease. The mechanisms linking poor sleep with an increased cardiovascular risk are incompletely understood. We examined whether a high risk of OSA as well as insomnia symptoms are associated with neuroendocrine hormones and coagulation factors in patients admitted with acute myocardial infarction. Methods We assessed 190 patients (mean age 60 years, 83% men) in terms of OSA risk (STOP screening tool for the assessment of high vs. low OSA risk) and severity of insomnia symptoms (Jenkins Sleep Scale for the assessment of subjective sleep difficulties) within 48 h of an acute coronary intervention. Circulating concentrations of epinephrine, norepinephrine, cortisol, fibrinogen, D-dimer, and von Willebrand factor were measured the next morning. The association of OSA risk and insomnia symptoms with neuroendocrine hormones and coagulation factors was computed using multivariate models adjusting for demographic factors, health behaviors, somatic and psychiatric comorbidities, cardiac disease-related variables, and OSA risk in the model for insomnia symptoms, respectively, for insomnia symptoms in the model for OSA risk. Results High OSA risk was identified in 41% of patients and clinically relevant insomnia symptoms were reported by 27% of patients. Compared to those with low OSA risk, patients with high OSA risk had lower levels of epinephrine (p = 0.015), norepinephrine (p = 0.049) and cortisol (p = 0.001). More severe insomnia symptoms were associated with higher levels of fibrinogen (p = 0.037), driven by difficulties initiating sleep, and with lower levels of norepinephrine (p = 0.024), driven by difficulties maintaining sleep. Conclusions In patients with acute myocardial infarction, sleep problems are associated with neuroendocrine hormones and coagulation activity. The pattern of these relationships is not uniform for patients with a high risk of OSA and those with insomnia symptoms, and whether they contribute to adverse cardiovascular outcomes needs to be established. Trial registration ClinicalTrials.gov NCT01781247.
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Affiliation(s)
- Roland von Känel
- Department of Consultation-Liaison Psychiatry and Psychosomatic Medicine, University Hospital Zurich, Culmannstrasse 8, CH-8091, Zurich, Switzerland.
| | - Mary Princip
- Department of Consultation-Liaison Psychiatry and Psychosomatic Medicine, University Hospital Zurich, Culmannstrasse 8, CH-8091, Zurich, Switzerland
| | - Jean-Paul Schmid
- Department of Cardiology, Clinic Barmelweid, Barmelweid, Switzerland
| | - Jürgen Barth
- Complementary and Integrative Medicine, University of Zurich, Zurich, Switzerland
| | - Hansjörg Znoj
- Department of Clinical Psychology and Psychotherapy, University of Bern, Bern, Switzerland
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11
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May AM, Van Wagoner DR, Mehra R. OSA and Cardiac Arrhythmogenesis: Mechanistic Insights. Chest 2017; 151:225-241. [PMID: 27693594 PMCID: PMC5989643 DOI: 10.1016/j.chest.2016.09.014] [Citation(s) in RCA: 96] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2016] [Revised: 09/14/2016] [Accepted: 09/16/2016] [Indexed: 12/13/2022] Open
Abstract
A surge of data has reproducibly identified strong associations of 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. Although 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 respiratory events and sympathetic surges subsequent to respiratory events, which contribute to augmented arrhythmic propensity. Other more immediate pathophysiologic influences of OSA-enhancing arrhythmogenesis include intermittent hypoxia, intrathoracic pressure swings leading to atrial stretch, and hypercapnia. Intermediate pathways by which OSA may trigger arrhythmia include increased systemic inflammation, oxidative stress, enhanced prothrombotic state, and vascular dysfunction. Long-term OSA-associated sequelae such as hypertension, atrial enlargement and fibrosis, ventricular hypertrophy, and coronary artery disease also predispose to cardiac arrhythmia. These factors can lead to a reduction in atrial effective refractory period, triggered and abnormal automaticity, and promote slowed and heterogeneous conduction; all of these mechanisms increase the persistence of reentrant arrhythmias and prolong the QT interval. Cardiac electrical and structural remodeling observed in OSA animal models can progress the arrhythmogenic substrate to further enhance arrhythmia generation. Future investigations clarifying the contribution of specific OSA-related mechanistic pathways to arrhythmia generation may allow targeted preventative therapies to mitigate OSA-induced arrhythmogenicity. Furthermore, interventional studies are needed to clarify the impact of OSA pathophysiology reversal on cardiac arrhythmogenesis and related adverse outcomes.
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Affiliation(s)
- Anna M May
- Division of Pulmonary, Critical Care, and Sleep Medicine, University Hospitals Cleveland Medical Center, Cleveland, OH.
| | - David R Van Wagoner
- Department of Molecular Cardiology, Lerner Research Institute, Cleveland Clinic Lerner College of Medicine of Case Western Reserve University, Cleveland, OH
| | - Reena Mehra
- Neurologic Institute, Respiratory Institute, Heart and Vascular Institute and Molecular Cardiology Department, Lerner Research Institute, Cleveland Clinic Lerner College of Medicine of Case Western Reserve University, Cleveland, OH
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12
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Liang J, Cade BE, Wang H, Chen H, Gleason KJ, Larkin EK, Saxena R, Lin X, Redline S, Zhu X. Comparison of Heritability Estimation and Linkage Analysis for Multiple Traits Using Principal Component Analyses. Genet Epidemiol 2016; 40:222-32. [PMID: 27027516 DOI: 10.1002/gepi.21957] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2015] [Revised: 11/30/2015] [Accepted: 12/14/2015] [Indexed: 12/16/2022]
Abstract
A disease trait often can be characterized by multiple phenotypic measurements that can provide complementary information on disease etiology, physiology, or clinical manifestations. Given that multiple phenotypes may be correlated and reflect common underlying genetic mechanisms, the use of multivariate analysis of multiple traits may improve statistical power to detect genes and variants underlying complex traits. The literature, however, has been unclear as to the optimal approach for analyzing multiple correlated traits. In this study, heritability and linkage analysis was performed for six obstructive sleep apnea hypopnea syndrome (OSAHS) related phenotypes, as well as principal components of the phenotypes and principal components of the heritability (PCHs) using the data from Cleveland Family Study, which include both African and European American families. Our study demonstrates that principal components generally result in higher heritability and linkage evidence than individual traits. Furthermore, the PCHs can be transferred across populations, strongly suggesting that these PCHs reflect traits with common underlying genetic mechanisms for OSAHS across populations. Thus, PCHs can provide useful traits for using data on multiple phenotypes and for genetic studies of trans-ethnic populations.
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Affiliation(s)
- Jingjing Liang
- Department of Epidemiology and Biostatistics, School of Medicine, Case Western Reserve University, Cleveland, Ohio, United States of America
| | - Brian E Cade
- Division of Sleep and Circadian Disorders, Brigham and Women's Hospital, Boston, Massachusetts, United States of America.,Division of Sleep Medicine, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Heming Wang
- Department of Epidemiology and Biostatistics, School of Medicine, Case Western Reserve University, Cleveland, Ohio, United States of America
| | - Han Chen
- Department of Biostatistics, Harvard T.H. Chan School of Public Health, Boston, Massachusetts, United States of America
| | - Kevin J Gleason
- Division of Sleep and Circadian Disorders, Brigham and Women's Hospital, Boston, Massachusetts, United States of America.,Division of Sleep Medicine, Harvard Medical School, Boston, Massachusetts, United States of America
| | - Emma K Larkin
- Department of Medicine, Division of Allergy, Pulmonary and Critical Care, Vanderbilt University Medical Center, Nashville, Tennessee, United States of America
| | - Richa Saxena
- Division of Sleep and Circadian Disorders, Brigham and Women's Hospital, Boston, Massachusetts, United States of America.,Division of Sleep Medicine, Harvard Medical School, Boston, Massachusetts, United States of America.,Center for Human Genetic Research and Department of Anesthesia, Pain, and Critical Care Medicine, Massachusetts General Hospital, Boston, Massachusetts, United States of America.,Program in Medical and Population Genetics, Broad Institute, Cambridge, Massachusetts, United States of America
| | - Xihong Lin
- Department of Biostatistics, Harvard T.H. Chan School of Public Health, Boston, Massachusetts, United States of America
| | - Susan Redline
- Division of Sleep and Circadian Disorders, Brigham and Women's Hospital, Boston, Massachusetts, United States of America.,Division of Sleep Medicine, Harvard Medical School, Boston, Massachusetts, United States of America.,Division of Pulmonary, Critical Care, and Sleep Medicine, Beth Israel Deaconess Medical Center, Boston, Massachusetts, United States of America
| | - Xiaofeng Zhu
- Department of Epidemiology and Biostatistics, School of Medicine, Case Western Reserve University, Cleveland, Ohio, United States of America
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13
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D'Silva L, Wilczynska M, Lewis K, Lawrence M, Hawkins K, Williams R, Stanford S, Davidson S, Morris K, Evans A. Altered clot microstructure detected in obstructive sleep apnoea hypopnoea syndrome. ACTA ACUST UNITED AC 2016; 9:14-9. [PMID: 27226818 PMCID: PMC4867923 DOI: 10.1016/j.slsci.2016.02.175] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2015] [Revised: 01/19/2016] [Accepted: 02/11/2016] [Indexed: 11/26/2022]
Abstract
Abnormal clot microstructure plays a pivotal role in the pathophysiology of thromboembolic diseases. Assessing the viscoelastic properties of clot microstructure using novel parameters, Time to Gel Point (TGP), Fractal Dimension (df) and clot elasticity (G׳GP) could explain the increased cardiovascular and thromboembolic events in patients with Obstructive Sleep Apnoea Hypopnea Syndrome (OSAHS). We wanted to compare TGP, df, and G׳GP and their diurnal variation in OSAHS and symptomatic comparators. thirty six patients attending a sleep disturbed breathing clinic with symptoms of OSAHS were recruited. TGP, df and G׳GP were measured alongside standard coagulation screening, thrombin generation assays, and platelet aggregometry at 16:00 h and immediately after an in-patient sleep study at 07:30 h. OSAHS group had significantly lower afternoon df than comparators (1.705±0.033 vs. 1.731±0.031, p<0.05). df showed diurnal variation and only in the OSAHS group, being significantly lower in the afternoon than morning (p<0.05). Diurnal changes in df correlated with 4% DR, even after controlling for BMI (r=0.37, p=0.02). The lower df in the afternoon in OSAHS suggests a partial compensatory change that may make up for other pro-clotting abnormalities/hypertension during the night. The change to the thrombotic tendency in the afternoon is biggest in severe OSAHS. df Shows promise as a new microstructural indicator for abnormal haemostasis in OSAHS.
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Affiliation(s)
- Lindsay D'Silva
- College of Medicine, Institute of Life Science, Swansea University, Swansea, United Kingdom; NISCHR Haemostasis Biomedical Research Unit, Morriston Hospital, Swansea, Abertawe Bro Morgannwg University Health Board, Swansea SA6 6NL, United Kingdom
| | - Maria Wilczynska
- Respiratory Department, Prince Philip Hospital, Llanelli, Hywel Dda University Health Board, United Kingdom
| | - Keir Lewis
- College of Medicine, Institute of Life Science, Swansea University, Swansea, United Kingdom; Respiratory Department, Prince Philip Hospital, Llanelli, Hywel Dda University Health Board, United Kingdom
| | - Matthew Lawrence
- NISCHR Haemostasis Biomedical Research Unit, Morriston Hospital, Swansea, Abertawe Bro Morgannwg University Health Board, Swansea SA6 6NL, United Kingdom
| | - Karl Hawkins
- College of Medicine, Institute of Life Science, Swansea University, Swansea, United Kingdom; NISCHR Haemostasis Biomedical Research Unit, Morriston Hospital, Swansea, Abertawe Bro Morgannwg University Health Board, Swansea SA6 6NL, United Kingdom
| | - Rhodri Williams
- College of Engineering, Swansea University, Swansea, United Kingdom
| | - Sophia Stanford
- NISCHR Haemostasis Biomedical Research Unit, Morriston Hospital, Swansea, Abertawe Bro Morgannwg University Health Board, Swansea SA6 6NL, United Kingdom
| | - Simon Davidson
- Department of Haematology, Royal Brompton Hospital, London, United Kingdom
| | - Keith Morris
- School of Applied Sciences, Cardiff Metropolitan University, Cardiff, United Kingdom
| | - Adrian Evans
- College of Medicine, Institute of Life Science, Swansea University, Swansea, United Kingdom; NISCHR Haemostasis Biomedical Research Unit, Morriston Hospital, Swansea, Abertawe Bro Morgannwg University Health Board, Swansea SA6 6NL, United Kingdom
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14
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Emin M, Wang G, Castagna F, Rodriguez-Lopez J, Wahab R, Wang J, Adams T, Wei Y, Jelic S. Increased internalization of complement inhibitor CD59 may contribute to endothelial inflammation in obstructive sleep apnea. Sci Transl Med 2016; 8:320ra1. [PMID: 26738794 PMCID: PMC5485919 DOI: 10.1126/scitranslmed.aad0634] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Obstructive sleep apnea (OSA), characterized by intermittent hypoxia (IH) during transient cessation of breathing, triples the risk for cardiovascular diseases. We used a phage display peptide library as an unbiased approach to investigate whether IH, which is specific to OSA, activates endothelial cells (ECs) in a distinctive manner. The target of a differentially bound peptide on ECs collected from OSA patients was identified as CD59, a major complement inhibitor that protects ECs from the membrane attack complex (MAC). A decreased proportion of CD59 is located on the EC surface in OSA patients compared with controls, suggesting reduced protection against complement attack. In vitro, IH promoted endothelial inflammation predominantly via augmented internalization of CD59 and consequent MAC deposition. Increased internalization of endothelial CD59 in IH appeared to be cholesterol-dependent and was reversed by statins in a CD59-dependent manner. These studies suggest that reduced complement inhibition may mediate endothelial inflammation and increase vascular risk in OSA patients.
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Affiliation(s)
- Memet Emin
- Division of Pulmonary, Allergy, and Critical Care Medicine, Columbia University College of Physicians and Surgeons, New York, NY 10032, USA
| | - Gang Wang
- Division of Pulmonary, Allergy, and Critical Care Medicine, Columbia University College of Physicians and Surgeons, New York, NY 10032, USA
| | - Francesco Castagna
- Division of Pulmonary, Allergy, and Critical Care Medicine, Columbia University College of Physicians and Surgeons, New York, NY 10032, USA
| | - Josanna Rodriguez-Lopez
- Division of Pulmonary, Allergy, and Critical Care Medicine, Columbia University College of Physicians and Surgeons, New York, NY 10032, USA
| | - Romina Wahab
- Division of Pulmonary, Allergy, and Critical Care Medicine, Columbia University College of Physicians and Surgeons, New York, NY 10032, USA
| | - Jing Wang
- Division of Pulmonary, Allergy, and Critical Care Medicine, Columbia University College of Physicians and Surgeons, New York, NY 10032, USA
| | - Tessa Adams
- Division of Pulmonary, Allergy, and Critical Care Medicine, Columbia University College of Physicians and Surgeons, New York, NY 10032, USA
| | - Ying Wei
- Division of Biostatistics, Columbia University College of Physicians and Surgeons, New York, NY 10032, USA
| | - Sanja Jelic
- Division of Pulmonary, Allergy, and Critical Care Medicine, Columbia University College of Physicians and Surgeons, New York, NY 10032, USA,Corresponding author.
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15
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García Suquia A, Alonso-Fernández A, de la Peña M, Romero D, Piérola J, Carrera M, Barceló A, Soriano JB, Arque M, Fernández-Capitán C, Lorenzo A, García-Río F. High D-dimer levels after stopping anticoagulants in pulmonary embolism with sleep apnoea. Eur Respir J 2015. [DOI: 10.1183/13993003.02041-2014] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Obstructive sleep apnoea is a risk factor for pulmonary embolism. Elevated D-dimer levels and other biomarkers are associated with recurrent pulmonary embolism. The objectives were to compare the frequency of elevated D-dimer levels (>500 ng·mL−1) and further coagulation biomarkers after oral anticoagulation withdrawal in pulmonary embolism patients, with and without obstructive sleep apnoea, including two control groups without pulmonary embolism.We performed home respiratory polygraphy. We also measured basic biochemical profile and haemogram, and coagulation biomarkers (D-dimer, prothrombin fragment 1+2, thrombin-antithrombin complex, plasminogen activator inhibitor 1, and soluble P-selectin).64 (74.4%) of the pulmonary embolism cases and 41 (46.11%) of the controls without pulmonary embolism had obstructive sleep apnoea. Plasmatic D-dimer was higher in PE patients with OSA than in those without obstructive sleep apnoea. D-dimer levels were significantly correlated with apnoea–hypopnoea index, and nocturnal hypoxia. There were more patients with high D-dimer after stopping anticoagulants in those with pulmonary embolism and obstructive sleep apnoea compared with PE without obstructive sleep apnoea (35.4% versus 19.0%, p=0.003). Apnoea–hypopnoea index was independently associated with high D-dimer.Pulmonary embolism patients with obstructive sleep apnoea had higher rates of elevated D-dimer levels after anticoagulation discontinuation for pulmonary embolism than in patients without obstructive sleep apnoea and, therefore, higher procoagulant state that might increase the risk of pulmonary embolism recurrence.
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16
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Arzt M, Hetzenecker A, Steiner S, Buchner S. Sleep-Disordered Breathing and Coronary Artery Disease. Can J Cardiol 2015; 31:909-17. [DOI: 10.1016/j.cjca.2015.03.032] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2014] [Revised: 03/06/2015] [Accepted: 03/25/2015] [Indexed: 01/02/2023] Open
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17
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Hoyos CM, Melehan KL, Liu PY, Grunstein RR, Phillips CL. Does obstructive sleep apnea cause endothelial dysfunction? A critical review of the literature. Sleep Med Rev 2015; 20:15-26. [PMID: 25088969 DOI: 10.1016/j.smrv.2014.06.003] [Citation(s) in RCA: 86] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2014] [Revised: 06/09/2014] [Accepted: 06/12/2014] [Indexed: 01/29/2023]
Affiliation(s)
- Camilla M Hoyos
- NHMRC Centre for Integrated Research and Understanding of Sleep (CIRUS), Woolcock Institute of Medical Research, University of Sydney, Sydney, Australia.
| | - Kerri L Melehan
- NHMRC Centre for Integrated Research and Understanding of Sleep (CIRUS), Woolcock Institute of Medical Research, University of Sydney, Sydney, Australia; Department of Respiratory and Sleep Medicine, Royal Prince Alfred Hospital, Sydney, Australia
| | - Peter Y Liu
- Division of Endocrinology, Department of Medicine, Harbor-UCLA Medical Center and Los Angeles Biomedical Research Institute, Torrance, CA, USA
| | - Ronald R Grunstein
- NHMRC Centre for Integrated Research and Understanding of Sleep (CIRUS), Woolcock Institute of Medical Research, University of Sydney, Sydney, Australia; Department of Respiratory and Sleep Medicine, Royal Prince Alfred Hospital, Sydney, Australia
| | - Craig L Phillips
- NHMRC Centre for Integrated Research and Understanding of Sleep (CIRUS), Woolcock Institute of Medical Research, University of Sydney, Sydney, Australia; Department of Respiratory and Sleep Medicine, Royal North Shore Hospital, Sydney, Australia
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18
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Bargagli E, Madioni C, Bianchi N, Refini RM, Cappelli R, Rottoli P. Serum analysis of coagulation factors in IPF and NSIP. Inflammation 2014; 37:10-6. [PMID: 23912648 DOI: 10.1007/s10753-013-9706-z] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Recent literature and our previous proteomic findings prompted us to study the coagulation system in idiopathic pulmonary fibrosis (IPF), the pathogenesis of which remains unclear. The aim of this study was to compare coagulation factors in idiopathic pulmonary fibrosis and idiopathic nonspecific interstitial pneumonia (NSIP) patients and healthy controls. Thirty-three IPF patients (23 acute exacerbation and 10 stable IPF patients), 7 NSIP patients, and 44 controls were enrolled. Concentrations of D-dimer, homocysteine, functional protein C, protein C antigen, free and total protein S antigen and activity, fibrinogen and factor VIIIc were analyzed in serum of patients and controls. The lupus anticoagulant (LAC) test was also performed. Factor VIIIc levels were significantly higher in acute exacerbation IPF patients than controls (p = 0.0001) and in stable IPF patients than controls (p = 0.002). Factor VIIIc levels were higher and PT levels were lower in acute exacerbation IPF patients who died after exacerbation than in patients who survived (p = 0.04 and p = 0.003, respectively). D-dimer, fibrinogen, and homocysteine levels were also significantly higher in IPF patients than controls (p < 0.01). Protein C activity was increased in acute exacerbation IPF patients than controls (p = 0.005). The LAC test was positive in seven IPF patients and negative in controls. Procoagulant status was demonstrated in IPF patients (mainly in acute exacerbation/IPF) than controls and NSIP patients, probably due to endothelial activation and microvascular injury. These preliminary results are of interest because of their potential implications in the pathogenesis and treatment of this disease.
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Affiliation(s)
- E Bargagli
- Respiratory Diseases Section, Department of Clinical Medicine and Immunological Sciences, Siena University, Policlinico S. Maria Le Scotte Viale M. Bracci 16, 53100, Siena, Italy,
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19
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Adhesion molecule increases in sleep apnea: beneficial effect of positive airway pressure and moderation by obesity. Int J Obes (Lond) 2014; 39:472-9. [PMID: 25042863 PMCID: PMC4302066 DOI: 10.1038/ijo.2014.123] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/10/2014] [Revised: 07/02/2014] [Accepted: 07/06/2014] [Indexed: 11/08/2022]
Abstract
BACKGROUND Elevated levels of intercellular adhesion molecule 1 (ICAM-1) and vascular cell adhesion molecule 1 (VCAM-1) may contribute to cardiovascular disease and are associated with obstructive sleep apnea (OSA) and obesity. The relationship between OSA and obesity in determining ICAM-1 and VCAM-1 levels, and the effect of treatment, is unclear. OBJECTIVE Our aim was to study whether positive airway pressure (PAP) usage resulted in changes in ICAM-1 and VCAM-1 after 2 years within 309 OSA patients from the Icelandic Sleep Apnea Cohort, and determine how obesity affected such changes. SUBJECTS/METHODS The mean body mass index (BMI) was 32.4±5.1 kg m(-2); subjects had moderate-to-severe OSA (apnea-hypopnea index=45.0±20.2) and 79% were male. There were 177 full PAP users (⩾4 h per night and ⩾20 of last 28 nights), 44 partial (<4 h per night or <20 nights) and 88 nonusers. RESULTS ICAM-1 (P<0.001) and VCAM-1 (P=0.012) change was significantly different among the PAP groups. The largest ICAM-1 differences were among the most obese subjects (P<0.001). At follow-up, nonusers had increased ICAM-1 compared with decreased levels in full users. All groups had increased VCAM-1, but nonusers had a significantly larger increase than full users. CONCLUSIONS Within moderate-to-severe OSA patients, PAP usage prevents increases in adhesion molecules observed in nonusers after 2 years. For ICAM-1, the largest effect is in the most obese subjects. As OSA and obesity commonly coexist, the usage of PAP to limit increases in adhesion molecules may decrease the rate of progression of OSA-related cardiovascular disease.
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20
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Weng LC, Tang W, Rich SS, Smith NL, Redline S, O'Donnell CJ, Basu S, Reiner AP, Delaney JA, Tracy RP, Palmer CD, Young T, Yang Q, Folsom AR, Cushman M. A genetic association study of D-dimer levels with 50K SNPs from a candidate gene chip in four ethnic groups. Thromb Res 2014; 134:462-7. [PMID: 24908450 DOI: 10.1016/j.thromres.2014.05.018] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2014] [Revised: 04/19/2014] [Accepted: 05/13/2014] [Indexed: 11/15/2022]
Abstract
INTRODUCTION D-dimer, a fibrin degradation product, is related to risk of cardiovascular disease and venous thromboembolism. Genetic determinants of D-dimer are not well characterized; notably, few data have been reported for African American (AA), Asian, and Hispanic populations. MATERIALS AND METHODS We conducted a large-scale candidate gene association study to identify variants in genes associated with D-dimer levels in multi-ethnic populations. Four cohorts, comprising 6,848 European Americans (EAs), 2,192 AAs, 670 Asians, and 1,286 Hispanics in the National Heart, Lung, and Blood Institute Candidate Gene Association Resource consortium, were assembled. Approximately 50,000 genotyped single nucleotide polymorphisms (SNPs) in 2,000 cardiovascular disease gene loci were analyzed by linear regression, adjusting for age, sex, study site, and principal components in each cohort and ethnic group. Results across studies were combined within each ethnic group by meta-analysis. RESULTS Twelve SNPs in coagulation factor V (F5) and 3 SNPs in the fibrinogen alpha chain (FGA) were significantly associated with D-dimer level in EAs with p<2.0×10(-6). The signal for the most associated SNP in F5 (rs6025, factor V Leiden) was replicated in Hispanics (p=0.023), while that for the top functional SNP in FGA (rs6050) was replicated in AAs (p=0.006). No additional SNPs were significantly associated with D-dimer. CONCLUSIONS Our study replicated previously reported associations of D-dimer with SNPs in F5 and FGA in EAs; we demonstrated replication of the association of D-dimer with FGA rs6050 in AAs and the factor V Leiden variant in Hispanics.
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Affiliation(s)
- Lu-Chen Weng
- Division of Epidemiology and Community Health, School of Public Health, University of Minnesota, Minneapolis, MN, USA
| | - Weihong Tang
- Division of Epidemiology and Community Health, School of Public Health, University of Minnesota, Minneapolis, MN, USA.
| | - Stephen S Rich
- Department of Public Health Sciences and the Center for Public Health Genomics, University of Virginia, Charlottesville, VA, USA
| | - Nicholas L Smith
- Department of Epidemiology, School of Public Health, University of Washington, Seattle, WA, USA; Group Health Research Institute, Group Health Cooperative, Seattle, WA, USA; Seattle Epidemiologic Research and Information Center, Department of Veterans Affairs Office of Research and Development, Seattle, WA, USA
| | - Susan Redline
- Division of Sleep Medicine, Department of Medicine, Brigham and Women's Hospital and Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA
| | | | - Saonli Basu
- Division of Biostatistics, School of Public Health, University of Minnesota, Minneapolis, MN, USA
| | - Alexander P Reiner
- Department of Epidemiology, School of Public Health, University of Washington, Seattle, WA, USA
| | - Joseph A Delaney
- Department of Epidemiology, School of Public Health, University of Washington, Seattle, WA, USA
| | - Russell P Tracy
- Departments of Pathology and Biochemistry, University of Vermont, Burlington, VT, USA
| | - Cameron D Palmer
- Broad Institute of Harvard and Massachusetts Institute of Technology (MIT), Cambridge, MA, USA
| | - Taylor Young
- Broad Institute of Harvard and Massachusetts Institute of Technology (MIT), Cambridge, MA, USA
| | - Qiong Yang
- The NHLBI's Framingham Heart Study, Framingham, MA, USA; Department of Biostatistics, School of Public Health, Boston University, Boston, MA, USA
| | - Aaron R Folsom
- Division of Epidemiology and Community Health, School of Public Health, University of Minnesota, Minneapolis, MN, USA
| | - Mary Cushman
- Departments of Medicine and Pathology, University of Vermont, Burlington, VT, USA
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21
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Tosur Z, Green D, De Chavez PJ, Knutson KL, Goldberger JJ, Zee P, Liu K, Kim KY, Carnethon MR. The association between sleep characteristics and prothrombotic markers in a population-based sample: Chicago Area Sleep Study. Sleep Med 2014; 15:973-8. [PMID: 24924657 DOI: 10.1016/j.sleep.2014.04.005] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/18/2014] [Revised: 03/21/2014] [Accepted: 04/14/2014] [Indexed: 12/15/2022]
Abstract
BACKGROUND AND AIM Short sleep duration and poor quality sleep are associated with coronary heart disease (CHD) mortality; however, the underlying pathophysiologic process remains unclear. Sleep apnea may confound the association because of its relationship with formation of thrombi, the vascular occlusive process in CHD. We tested whether sleep duration and quality were associated with prothrombotic biomarkers in adults with a low probability of apnea. METHODS We included adults aged 35-64 years recruited from the community and who had an apnea hypopnea index <15 after one night of screening (n=506). Sleep duration and maintenance were determined from 7 days of wrist actigraphy; daytime sleepiness was estimated using the Epworth Sleepiness Scale. Factor VIII (FVIII), von Willebrand factor (vWF), thrombin antithrombin (TAT) complexes, and plasminogen activator inhibitor-1 (PAI-1) were measured in fasting blood. RESULTS Sleep duration, maintenance, and daytime sleepiness were not associated with FVIII, vWf, or TAT. Sleep maintenance was modestly inversely associated with higher levels of log-transformed PAI-1 (β = -0.07, standard error (SE)=0.03 per 4.8%, p=0.04) following adjustment for demographic characteristics, cardiovascular risk factors, and body mass index (BMI). CONCLUSIONS Mild impairment in sleep was modestly associated with activation of coagulation; further study is needed to evaluate the role of fibrinolytic factors in sleep-mediated coronary thrombosis.
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Affiliation(s)
- Zehra Tosur
- Division of Hematology/Oncology, Department of Medicine, Chicago, IL, USA
| | - David Green
- Division of Hematology/Oncology, Department of Medicine, Chicago, IL, USA
| | - Peter John De Chavez
- Department of Preventive Medicine, Feinberg School of Medicine of Northwestern University, Chicago, IL, USA
| | | | - Jeffrey J Goldberger
- Department of Preventive Medicine, Feinberg School of Medicine of Northwestern University, Chicago, IL, USA
| | - Phyllis Zee
- Department of Preventive Medicine, Feinberg School of Medicine of Northwestern University, Chicago, IL, USA
| | - Kiang Liu
- Department of Preventive Medicine, Feinberg School of Medicine of Northwestern University, Chicago, IL, USA
| | - Kwang-Youn Kim
- Department of Preventive Medicine, Feinberg School of Medicine of Northwestern University, Chicago, IL, USA
| | - Mercedes R Carnethon
- Department of Preventive Medicine, Feinberg School of Medicine of Northwestern University, Chicago, IL, USA.
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22
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The Additive Impact of Periodic Limb Movements during Sleep on Inflammation in Patients with Obstructive Sleep Apnea. Ann Am Thorac Soc 2014; 11:375-82. [DOI: 10.1513/annalsats.201306-144oc] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
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Shamsuzzaman A, Szczesniak RD, Fenchel MC, Amin RS. Glucose, insulin, and insulin resistance in normal-weight, overweight and obese children with obstructive sleep apnea. Obes Res Clin Pract 2013; 8:e584-91. [PMID: 25434914 DOI: 10.1016/j.orcp.2013.11.006] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/29/2013] [Revised: 11/06/2013] [Accepted: 11/21/2013] [Indexed: 10/25/2022]
Abstract
BACKGROUND Obstructive sleep apnea (OSA) is associated with components of metabolic syndrome. Both body weight and OSA independently influence metabolic measurements. The goal of this study was to determine whether OSA in normal-weight, overweight or obese children, compared to matched control groups, was associated with increased levels of glucose, insulin and insulin resistance (IR). METHODS Age- and gender-specific body mass index (BMI) percentiles were determined and used to categorize subjects into normal-weight (BMI<85%) and overweight-obese (BMI≥85%) groups. In addition, subjects were divided into normal-weight (BMI<85%), overweight (BMI≥85% and <95%) and obese (BMI≥95%) groups. Polysomnography was conducted and morning levels of glucose and insulin were measured and IR was determined from the blood samples collected early in the morning after overnight fast. Results were compared between the subject groups. Effects of severity of OSA defined by apnea hypopnea index (AHI) and oxygen desaturation index (ODI) on glucose, insulin, and HOMA-IR were analyzed. RESULTS Glucose, insulin, and HOMA-IR in OSA and matched control groups were not significantly different for normal-weight, overweight and obese subjects. The ODI was significantly associated with elevated levels of glucose and HOMA-IR after adjustment for age, gender, race, and BMI Z-score. CONCLUSIONS IR levels between OSA and control for both normal-weight, overweight and obese subjects were not significantly different. The ODI was associated with increased IR in children with OSA. OSA-induced hypoxic events during sleep may be a potential mechanism of increased IR in children with OSA, independent of body weight.
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Affiliation(s)
- Abu Shamsuzzaman
- Cincinnati Children's Hospital Medical Center, Cincinnati, OH, United States.
| | - Rhonda D Szczesniak
- Cincinnati Children's Hospital Medical Center, Cincinnati, OH, United States
| | - Matthew C Fenchel
- Cincinnati Children's Hospital Medical Center, Cincinnati, OH, United States
| | - Raouf S Amin
- Cincinnati Children's Hospital Medical Center, Cincinnati, OH, United States
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Kalucy MJ, Grunstein R, Lambert T, Glozier N. Obstructive sleep apnoea and schizophrenia – A research agenda. Sleep Med Rev 2013; 17:357-65. [DOI: 10.1016/j.smrv.2012.10.003] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2011] [Revised: 10/08/2012] [Accepted: 10/09/2012] [Indexed: 01/10/2023]
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Blomster H, Laitinen T, Lyyra-Laitinen T, Vanninen E, Gylling H, Peltonen M, Martikainen T, Sahlman J, Kokkarinen J, Randell J, Smirnov G, Seppä J, Tuomilehto H. Endothelial function is well preserved in obese patients with mild obstructive sleep apnea. Sleep Breath 2013; 18:177-86. [PMID: 23733256 DOI: 10.1007/s11325-013-0867-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2012] [Revised: 02/16/2013] [Accepted: 05/21/2013] [Indexed: 01/10/2023]
Abstract
PURPOSE Endothelial dysfunction is one of the early markers of cardiovascular complications in obstructive sleep apnea (OSA). The aim of our study was to evaluate whether overweight patients with mild OSA displayed endothelial dysfunction, and to assess the effect of 1-year lifestyle intervention with an early very low calorie diet in endothelial function. METHODS At baseline, the study population consisted of 83 overweight patients with mild OSA and 46 weight-matched non-OSA subjects. OSA patients were further randomized into a 1-year supervised lifestyle intervention group or control group which received routine lifestyle counselling. Endothelial function measured by brachial artery flow-mediated dilatation (FMD), apnea-hypopnea index (AHI), body mass index (BMI), and metabolic parameters were assessed at baseline and 12 months. RESULTS No correlations between endothelial function and mild OSA were detected. However, patients with impaired endothelial function had lower mean saturation and impaired endothelial function correlated significantly with glucose intolerance and dyslipidemia. After the lifestyle intervention and successful weight reduction, AHI, BMI, serum triglycerides and insulin improved significantly; however, no improvement in FMD was detected. CONCLUSIONS Mild OSA was not observed to be associated with endothelial dysfunction. Although in mild OSA endothelial function is still preserved, lifestyle intervention with weight reduction did achieve an improvement in other obesity-related risk factors for cardiovascular diseases, thus highlighting the importance of early intervention.
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Affiliation(s)
- Henry Blomster
- Institute of Clinical Medicine, Department of Otorhinolaryngology, Kuopio University Hospital, and University of Eastern Finland, P.O. Box 1777, 70211, Kuopio, Finland,
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Seif F, Patel SR, Walia H, Rueschman M, Bhatt DL, Gottlieb DJ, Lewis EF, Patil SP, Punjabi NM, Babineau DC, Redline S, Mehra R. Association between obstructive sleep apnea severity and endothelial dysfunction in an increased background of cardiovascular burden. J Sleep Res 2013; 22:443-51. [PMID: 23331757 DOI: 10.1111/jsr.12026] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2012] [Accepted: 11/25/2012] [Indexed: 12/22/2022]
Abstract
The objective of this study is to examine whether increasing obstructive sleep apnea (OSA) severity is associated with worsening endothelial function. The design is a cross-sectional examination of the baseline assessment of a multi-centre randomized controlled clinical trial examining the effects of oxygen, continuous positive airway pressure (CPAP) therapy or lifestyle modifications on cardiovascular biomarkers. Participants were recruited from cardiology clinics at four sites. Participants with an apnea-hypopnea index (AHI) of 15-50 and known cardio/cerebrovascular disease (CVD) or CVD risk factors were included. OSA severity indices [oxygen desaturation index (ODI), AHI and percentage of sleep time below 90% oxygen saturation (total sleep time <90)] and a measure of endothelium-mediated vasodilatation [Framingham reactive hyperaemia index (F-RHI) derived from peripheral arterial tonometry (PAT)] were assessed. The sample included 267 individuals with a mean AHI of 25.0 ± 8.5 SD and mean F-RHI 0.44 ± 0.38. In adjusted models, the slope of the relationship between ODI and F-RHI differed above and below an ODI of 24.6 (P = 0.04), such that above an ODI of 24.6 there was a marginally significant decline in the geometric mean of the PAT ratio by 3% [95% confidence interval (CI): 0%, 5%; P = 0.05], while below this point, there was a marginally significant incline in the geometric mean of the PAT ratio by 13% (95% CI: 0%, 27%; P = 0.05) per 5-unit increase in ODI. A similar pattern was observed between AHI and F-RHI. No relation was noted with total sleep time <90 and F-RHI. There was evidence of a graded decline in endothelial function in association with higher levels of intermittent hypoxaemia.
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Affiliation(s)
- Fadi Seif
- Department of Medicine, Case School of Medicine, Cleveland, OH, USA
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von Känel R, Natarajan L, Ancoli-Israel S, Mills PJ, Wolfson T, Gamst AC, Loredo JS, Dimsdale JE. Effect of continuous positive airway pressure on day/night rhythm of prothrombotic markers in obstructive sleep apnea. Sleep Med 2013; 14:58-65. [PMID: 23036264 PMCID: PMC3540139 DOI: 10.1016/j.sleep.2012.07.009] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/13/2012] [Revised: 06/02/2012] [Accepted: 07/26/2012] [Indexed: 11/22/2022]
Abstract
OBJECTIVE Obstructive sleep apnea (OSA) has been associated with an increased risk of atherothrombotic events. A prothrombotic state might partially explain this link. This study investigated OSA patients' day/night rhythm of several prothrombotic markers and their potential changes with therapeutic continuous positive airway pressure (CPAP). METHODS The study included 51 OSA patients [apnea hypopnea index (AHI) ⩾10] and 24 non-OSA controls (AHI<10). Of the 51 OSA patients, 25 were randomized to CPAP and 26 to placebo-CPAP. Twelve blood samples were collected over a 24h period to measure prothrombotic markers. For the apneic patients these samples were collected before treatment and after 3weeks of treatment with either CPAP or placebo-CPAP. Day/night variation in prothrombotic markers was examined using a cosinor analysis. RESULTS Compared with controls, OSA patients showed lower mesor (mean) and amplitude (difference between maximum and minimum activity) of D-dimer. In unadjusted (but not in adjusted) analysis, patients showed higher mesor of plasminogen activator inhibitor-1 (p<0.05 in all cases). No significant group differences were seen in mesor and amplitude for either soluble tissue factor or von Willebrand factor, or the acrophase (time of the peak) and periodic pattern for any prothrombotic markers. There were no significant differences in changes of periodic pattern and in day/night rhythm parameters of prothrombotic markers pre- to post-treatment between the CPAP and placebo condition. CONCLUSIONS There may be altered day/night rhythm of some prothrombotic markers in OSA patients compared with controls. CPAP treatment for 3weeks did not affect day/night rhythm of prothrombotic markers in OSA patients differently from placebo-CPAP.
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Affiliation(s)
- Roland von Känel
- Department of General Internal Medicine, Inselspital, Bern University Hospital, and University of Bern, Switzerland
- Department of Psychiatry, University of California, San Diego, USA
| | - Loki Natarajan
- Department of Family and Preventive Medicine, University of California, San Diego, USA
| | - Sonia Ancoli-Israel
- Department of Psychiatry, University of California, San Diego, USA
- Department of Medicine, University of California, San Diego, USA
| | - Paul J. Mills
- Department of Psychiatry, University of California, San Diego, USA
| | - Tanya Wolfson
- Computational and Applied Statistics Laboratory, San Diego, Supercomputer Center University of California, San Diego, USA
| | - Anthony C. Gamst
- Computational and Applied Statistics Laboratory, San Diego, Supercomputer Center University of California, San Diego, USA
| | - José S. Loredo
- Department of Medicine, University of California, San Diego, USA
| | - Joel E. Dimsdale
- Department of Psychiatry, University of California, San Diego, USA
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Affiliation(s)
- Takatoshi Kasai
- Sleep Research Laboratory, Centre for Sleep Health and Research, and Department of Medicine of the University Health Network Toronto Rehabilitation Institute, Ontario, Canada
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The role of obesity, different fat compartments and sleep apnea severity in circulating leptin levels: the Icelandic Sleep Apnea Cohort study. Int J Obes (Lond) 2012; 37:835-42. [PMID: 22964793 PMCID: PMC3537909 DOI: 10.1038/ijo.2012.138] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Objectives To assess whether sleep apnea severity has an independent relationship with leptin levels in blood after adjusting for different measures of obesity and whether the relationship between OSA severity and leptin levels differs depending on obesity level. Methods Cross-sectional study of 452 untreated obstructive sleep apnea (OSA) patients (377 males and 75 females), in the Icelandic Sleep Apnea Cohort (ISAC), age 54.3±10.6 (mean±SD), BMI 32.7±5.3 kg/m2 and apnea-hypopnea index (AHI) 40.2 ± 16.1 events/hour. A sleep study and magnetic resonance imaging of abdominal visceral and subcutaneous fat volume were performed as well as fasting serum morning leptin levels measured. Results Leptin levels were more highly correlated with body mass index (BMI), total abdominal and subcutaneous fat volume than visceral fat volume per se. No relationship was found between sleep apnea severity and leptin levels, assessed within three BMI groups (BMI<30, BMI 30–35 and BMI>35 kg/m2). In a multiple linear regression model, adjusted for gender, BMI explained 38.7% of the variance in leptin levels, gender explained 21.2% but OSA severity did not have a significant role and no interaction was found between OSA severity and BMI on leptin levels. However, hypertension had a significant effect on the interaction between OSA severity and obesity (p=0.04). In post-hoc analysis for nonhypertensive OSA subjects (n=249), the association between leptin levels and OSA severity explained a minor but significant variance (3.2%) in leptin levels. This relationship was greatest for nonobese nonhypertensive subjects (significant interaction with obesity level). No relationship of OSA severity and leptin levels was found for hypertensive subjects (n=199). Conclusion Obesity and gender are the dominant determinants of leptin levels. OSA severity is not related to leptin levels except to a minor degree in nonhypertensive nonobese OSA subjects.
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Perkins JN, Liang C, Gao D, Shultz L, Friedman NR. Risk of post-tonsillectomy hemorrhage by clinical diagnosis. Laryngoscope 2012; 122:2311-5. [PMID: 22778043 DOI: 10.1002/lary.23421] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2011] [Revised: 03/13/2012] [Accepted: 04/18/2012] [Indexed: 11/09/2022]
Abstract
OBJECTIVES/HYPOTHESIS Obstructive sleep apnea (OSA) has been associated with upregulation of prothrombotic factors. We hypothesize that diagnosis of OSA may be protective against postoperative hemorrhage. This study investigates the relationships between preoperative clinical diagnosis and postoperative hemorrhage. STUDY DESIGN Seven-year retrospective case-control study. METHODS Medical records of tonsillectomy subjects with and without hemorrhage were reviewed for demographics, clinical diagnosis, and treatment. Clinical diagnoses included OSA confirmed by polysomnogram, sleep-disordered breathing (SDB), chronic tonsillitis, and a mixed group. RESULTS A total of 9,023 tonsillectomy patients were identified (52.0% male, 48.0% female; mean age, 6.9 years). Of these, 2.4% (n = 212) presented with hemorrhage. There were 48 (22.6%) primary and 164 (77.4%) secondary hemorrhages. The control group consisted of 1,488 nonhemorrhage patients. A multivariate logistic regression analysis compared the two groups controlling for age, sex, and clinical diagnosis. OSA patients were half as likely to hemorrhage compared to chronic tonsillitis patients (P = .04). SDB patients also had a lower chance of hemorrhage compared to chronic tonsillitis patients; this result was not significant (P = .09). Patients older than 6 years had a higher hemorrhage rate (P < .001). CONCLUSIONS This study demonstrates that patients with OSA may be less likely to have postoperative hemorrhage than patients with chronic tonsillitis. Younger age was associated with fewer hemorrhages.
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Affiliation(s)
- Jonathan N Perkins
- Department of Pediatric Otolaryngology, Children's Hospital Colorado, Aurora, Colorado 80045, USA
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Chou KT, Huang CC, Tsai DC, Chen YM, Perng DW, Shiao GM, Lee YC, Leu HB. Sleep apnea and risk of retinal vein occlusion: a nationwide population-based study of Taiwanese. Am J Ophthalmol 2012; 154:200-205.e1. [PMID: 22464364 DOI: 10.1016/j.ajo.2012.01.011] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2011] [Revised: 01/09/2012] [Accepted: 01/10/2012] [Indexed: 12/12/2022]
Abstract
PURPOSE To explore the relationship of sleep apnea and the subsequent development of retinal vein occlusion (RVO). DESIGN A retrospective nonrandomized, matched-control cohort study using the Taiwan National Health Insurance Research Database. METHODS From 1997 through 2007, we identified newly diagnosed sleep apnea cases in the database. A control group without sleep apnea, matched for age, gender, and comorbidities, was selected for comparison. The 2 cohorts were followed up, and the occurrence of RVO was observed. RESULTS Of the 35 634 sampled patients (5965 sleep apnea patients vs 29 669 controls), 52 (0.15%) experienced RVO during a mean follow-up period of 3.72 years, including 13 (0.22%, all branch RVO) from the sleep apnea cohort and 39 (0.13%, 39 branch RVO and 10 central RVO) from the control group. Kaplan-Meier analysis revealed the tendency of sleep apnea patients toward RVO development (P = .048, log-rank test). Patients with sleep apnea experienced a 1.94-fold increase (95% confidence interval, 1.03 to 3.65; P = .041) in incident RVO, which was independent of age, gender, and comorbidities. CONCLUSIONS Sleep apnea may be an independent risk factor for RVO.
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Affiliation(s)
- Kun-Ta Chou
- Department of Chest, Taipei Veterans General Hospital, Taipei, Taiwan
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Arnardottir ES, Maislin G, Schwab RJ, Staley B, Benediktsdottir B, Olafsson I, Juliusson S, Romer M, Gislason T, Pack AI. The interaction of obstructive sleep apnea and obesity on the inflammatory markers C-reactive protein and interleukin-6: the Icelandic Sleep Apnea Cohort. Sleep 2012; 35:921-32. [PMID: 22754038 DOI: 10.5665/sleep.1952] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
STUDY OBJECTIVES To assess the relative roles and interaction of obstructive sleep apnea (OSA) severity and obesity on interleukin-6 (IL-6) and C-reactive protein (CRP) levels. DESIGN Cross-sectional cohort. SETTING The Icelandic Sleep Apnea Cohort. PARTICIPANTS 454 untreated OSA patients (380 males and 74 females), mean ± standard deviation age 54.4 ± 10.6 yr. INTERVENTIONS N/A. MEASUREMENTS AND RESULTS Participants underwent a sleep study, abdominal magnetic resonance imaging to measure total abdominal and visceral fat volume, and had fasting morning IL-6 and CRP levels measured in serum. A significantly higher correlation was found for BMI than visceral fat volume with CRP and IL-6 levels. Oxygen desaturation index, hypoxia time, and minimum oxygen saturation (SaO₂) significantly correlated with IL-6 and CRP levels, but apnea-hypopnea index did not. When stratified by body mass index (BMI) category, OSA severity was associated with IL-6 levels in obese participants only (BMI > 30 kg/m²). A multiple linear regression model with interaction terms showed an independent association of OSA severity with IL-6 levels and an interaction between OSA severity and BMI, i.e., degree of obesity altered the relationship between OSA and IL-6 levels. An independent association of OSA severity with CRP levels was found for minimum SaO₂ only. A similar interaction of OSA severity and BMI on CRP levels was found for males and postmenopausal women. CONCLUSIONS OSA severity is an independent predictor of levels of IL-6 and CRP but interacts with obesity such that this association is found only in obese patients.
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Affiliation(s)
- Erna S Arnardottir
- Department of Respiratory Medicine and Sleep, Landspitali-The National University Hospital of Iceland, Reykjavik, Iceland
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Abstract
PURPOSE OF REVIEW To provide an update on the connection between obstructive sleep apnea (OSA) and cardiovascular disease. RECENT FINDINGS Large prospective studies have established that OSA is associated with an increased incidence of hypertension and, in men, of coronary disease, stroke, and heart failure. Advances in understanding the pathophysiologic basis for these associations include identification of a role for OSA in inducing abnormalities in hepatic lipid-metabolizing enzymes, endothelial dysfunction, and upregulation of pro-inflammatory and pro-thrombotic mediators. A large body of data implicates OSA as playing a significant role in the occurrence and resistance to treatment of atrial fibrillation. Clinical trials have shown small-to-modest improvements in blood pressure associated with continuous positive airway pressure (CPAP) use, with smaller or uncontrolled studies suggesting that CPAP may improve cardiovascular outcomes or intermediate markers. SUMMARY OSA and cardiovascular disease commonly co-aggregate. Multiple studies indicate that OSA contributes to or exacerbates cardiovascular disease, and thus may be a novel target for cardiovascular risk reduction. Although the evidence supports screening and treatment of OSA in patients at risk for cardiovascular disease, it also underscores a need for well powered clinical trials to examine the role of CPAP and other therapies in these populations.
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Affiliation(s)
- Babak Mokhlesi
- Section of Pulmonary and Critical Care Medicine, Department of Medicine, University of Chicago Pritzker School of Medicine, Chicago, IL 60637, USA.
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Sakakibara H, Romanowski CP, Jakubcakova V, Flachskamm C, Shimoi K, Kimura M. Feeble awake effects of plasminogen activator inhibitor type-1 in mice. Behav Brain Res 2011; 220:354-7. [DOI: 10.1016/j.bbr.2011.02.023] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2010] [Revised: 02/04/2011] [Accepted: 02/12/2011] [Indexed: 11/25/2022]
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Mehra R, Patel SR, Redline S, Xu F, Babineau DC, Tracy RP, Jenny NS. Impact of Sleep-Disordered Breathing on Coagulation: the Role of COPD Should Be Clarified. Am J Respir Crit Care Med 2011. [DOI: 10.1164/ajrccm.183.12.1731a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Su YF, Chou KT. Impact of Sleep-Disordered Breathing on Coagulation: the Role of COPD Should Be Clarified. Am J Respir Crit Care Med 2011; 183:1731; author response 1731-2. [DOI: 10.1164/ajrccm.183.12.1731] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Affiliation(s)
- Yi-Fong Su
- Taipei Veterans General Hospital Taipei, Taiwan
| | - Kun-Ta Chou
- National Yang-Ming University Taipei, Taiwan
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Cistulli PA, Phillips CL. Expanding the clinical spectrum of OSA--an association with pulmonary embolism? Sleep 2010; 33:1009-10. [PMID: 20815181 DOI: 10.1093/sleep/33.8.1009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Peter A Cistulli
- Centre for Sleep Health & Research, Department of Respiratory Medicine, Royal North Shore Hospital, Woolock Institute of Medical Research, University of Sydney, Australia.
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