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Wang J, Campos AI, García-Marín LM, Rentería ME, Xu L. Causal associations of sleep apnea and snoring with type 2 diabetes and glycemic traits and the role of BMI. Obesity (Silver Spring) 2023; 31:652-664. [PMID: 36746760 DOI: 10.1002/oby.23669] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/02/2022] [Revised: 11/20/2022] [Accepted: 11/28/2022] [Indexed: 02/08/2023]
Abstract
OBJECTIVE Sleep apnea and snoring have been associated with type 2 diabetes, with BMI playing a role in the pathway, but the directions of causality are unclear. This study examined the causal associations of sleep apnea and snoring with type 2 diabetes while assessing the role of BMI using multiple genetic methods. METHODS Five genetic methods were used: two-sample; bidirectional univariable Mendelian randomization (MR) inverse variance-weighted (MR-IVW); multivariable MR-IVW; network MR; and latent causal variable method. RESULTS Compared with univariable MR-IVW, the odds ratio (95% CI) of type 2 diabetes for genetically predicted sleep apnea and snoring using the largest genome-wide association study decreased dramatically, from 1.61 (95% CI: 1.16-2.23) to 1.08 (95% CI: 0.59-1.97) and from 1.98 (95% CI: 1.25-3.13) to 1.09 (95% CI: 0.64-1.86) after adjustment for BMI. Network MR showed that BMI accounts for 67% and 62% of the total effect of sleep apnea and snoring on type 2 diabetes, respectively. The latent causal variable suggested that sleep apnea and snoring have no direct causal effect on type 2 diabetes. CONCLUSIONS These results first suggest that the associations of sleep apnea and snoring with type 2 diabetes were mainly driven by BMI. The possible indirect effects of sleep apnea and snoring on type 2 diabetes through BMI cannot be ruled out.
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Affiliation(s)
- Jiao Wang
- School of Public Health, Sun Yat-Sen University, Guangzhou, China
| | - Adrian I Campos
- Department of Genetics & Computational Biology, Queensland Institute of Medical Research Berghofer Medical Research Institute, Herston, Queensland, Australia
| | - Luis M García-Marín
- Department of Genetics & Computational Biology, Queensland Institute of Medical Research Berghofer Medical Research Institute, Herston, Queensland, Australia
- School of Biomedical Sciences, Faculty of Medicine, The University of Queensland, Brisbane, Queensland, Australia
| | - Miguel E Rentería
- Department of Genetics & Computational Biology, Queensland Institute of Medical Research Berghofer Medical Research Institute, Herston, Queensland, Australia
| | - Lin Xu
- School of Public Health, Sun Yat-Sen University, Guangzhou, China
- School of Public Health, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong, China
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Sleep Apnea and Serum Serotonin Level Pre- and Post-PAP Therapy: A Preliminary Study. Neurol Ther 2021; 10:1095-1102. [PMID: 34669160 PMCID: PMC8571426 DOI: 10.1007/s40120-021-00290-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/19/2021] [Accepted: 10/05/2021] [Indexed: 12/04/2022] Open
Abstract
Introduction The high prevalence of obstructive sleep apnea (OSA), which impairs quality of life for numerous patients and leads to various OSA complications, has contributed to the continued interest in this disorder. The role of serotonin (5-HT) in many physiological processes, studies on its connection with the circadian system, and relationship to changes in sleep architecture are insufficient to assess the interaction of this neurotransmitter with nocturnal hypoxia. The aim of this study was to determine changes in sleep patterns and serum serotonin levels before and after positive airway pressure (PAP) therapy in patients with OSA. Methods The study involved 30 OSA patients (27 men and 3 women) who were treated with PAP for 3 months. Polysomnography using the GRASS TELEFACTOR (USA) and blood collection were conducted before and after PAP courses. Determination of serum serotonin was performed by high-performance liquid chromatography (HPLC). PAP therapy was performed using an automatic Prisma 20A (Germany) continuous positive airway pressure (CPAP) device. Results The use of PAP for 3 months revealed a significant improvement as measured by sleep data and serotonin levels (before: apnea index [AI] 17.2 eV/h, after: 2.4 eV/h p = 0.001; SpO2 < 90% − 45.7 min vs. 6.2 min p = 0.001; serotonin 20.3 ng/mL vs. 26.03 ng/mL p = 0.036]. Conclusion Our results demonstrate an improvement in sleep patterns. There was an increase in serum serotonin levels in OSA patients following PAP therapy, which could be an effect of intermittent hypoxia decline, and could be used as criteria for the effectiveness of PAP and an improvement in sleep quality.
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Pugliese G, Barrea L, Laudisio D, Salzano C, Aprano S, Colao A, Savastano S, Muscogiuri G. Sleep Apnea, Obesity, and Disturbed Glucose Homeostasis: Epidemiologic Evidence, Biologic Insights, and Therapeutic Strategies. Curr Obes Rep 2020; 9:30-38. [PMID: 31970714 DOI: 10.1007/s13679-020-00369-y] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
PURPOSE OF REVIEW Obstructive sleep apnea (OSA), obesity, and disturbed glucose homeostasis are usually considered distinct clinical condition, although they are tightly related to each other. The aim of our manuscript is to provide an overview of the current evidence on OSA, obesity, and disturbed glucose homeostasis providing epidemiologic evidence, biological insights, and therapeutic strategies. RECENT FINDINGS The mechanisms hypothesized to be involved in this complex interplay are the following: (1) "direct weight-dependent" mechanisms, according to which fat excess compromises respiratory mechanics, and (2) "indirect weight-dependent" mechanisms such as hyperglycemia, insulin resistance and secondary hyperinsulinemia, leptin resistance and other hormonal dysregulations frequently found in subjects with obesity, type 2 diabetes, and/or sleep disorders. Moreover, the treatment of each of these clinical conditions, through weight loss induced by diet or bariatric surgery, the use of anti-obesity or antidiabetic drugs, and continuous positive airway pressure (CPAP), seems to positively influence the others. These recent data suggest not only that there are multiple connections among these diseases but also that treating one of them may result in an improvement of the others.
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Affiliation(s)
- Gabriella Pugliese
- Dipartimento di Medicina Clinica e Chirurgia, Unit of Endocrinology, Federico II University Medical School of Naples, via Sergio Pansini 5, 80131, Naples, Italy
| | - Luigi Barrea
- Dipartimento di Medicina Clinica e Chirurgia, Unit of Endocrinology, Federico II University Medical School of Naples, via Sergio Pansini 5, 80131, Naples, Italy
| | - Daniela Laudisio
- Dipartimento di Medicina Clinica e Chirurgia, Unit of Endocrinology, Federico II University Medical School of Naples, via Sergio Pansini 5, 80131, Naples, Italy
| | - Ciro Salzano
- Dipartimento di Medicina Clinica e Chirurgia, Unit of Endocrinology, Federico II University Medical School of Naples, via Sergio Pansini 5, 80131, Naples, Italy
| | - Sara Aprano
- Dipartimento di Medicina Clinica e Chirurgia, Unit of Endocrinology, Federico II University Medical School of Naples, via Sergio Pansini 5, 80131, Naples, Italy
| | - Annamaria Colao
- Dipartimento di Medicina Clinica e Chirurgia, Unit of Endocrinology, Federico II University Medical School of Naples, via Sergio Pansini 5, 80131, Naples, Italy
| | - Silvia Savastano
- Dipartimento di Medicina Clinica e Chirurgia, Unit of Endocrinology, Federico II University Medical School of Naples, via Sergio Pansini 5, 80131, Naples, Italy
| | - Giovanna Muscogiuri
- Dipartimento di Medicina Clinica e Chirurgia, Unit of Endocrinology, Federico II University Medical School of Naples, via Sergio Pansini 5, 80131, Naples, Italy.
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Philip Esteban J, Dinani A. Lifestyle Interventions Beyond Diet and Exercise for Patients With Nonalcoholic Fatty Liver Disease. Gastroenterol Hepatol (N Y) 2020; 16:119-130. [PMID: 34035711 PMCID: PMC8132696] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Nonalcoholic fatty liver disease (NAFLD) is a growing worldwide concern, affecting approximately 30% of the US adult population. Developing pharmacologic therapies for NAFLD is crucial, especially as there are currently no treatments approved by the US Food and Drug Administration. However, weight loss remains the cornerstone of treatment and has been shown in controlled trials to improve hepatic steatosis, hepatic inflammation, and fibrosis. Healthy diet and exercise are the most well-known and frequently recommended lifestyle modifications for patients with NAFLD. This article presents the data on other aspects of healthy lifestyle modifications for patients with this condition, focusing on light alcohol consumption, coffee, circadian misalignments, and sleep.
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Affiliation(s)
- James Philip Esteban
- Dr Esteban is an assistant professor in the Division of Gastroenterology and Hepatology at the Medical College of Wisconsin in Milwaukee, Wisconsin
- Dr Dinani is an assistant professor in the Division of Liver Diseases at the Icahn School of Medicine at Mount Sinai in New York, New York
| | - Amreen Dinani
- Dr Esteban is an assistant professor in the Division of Gastroenterology and Hepatology at the Medical College of Wisconsin in Milwaukee, Wisconsin
- Dr Dinani is an assistant professor in the Division of Liver Diseases at the Icahn School of Medicine at Mount Sinai in New York, New York
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Relationship Between Intermittent Hypoxia and Type 2 Diabetes in Sleep Apnea Syndrome. Int J Mol Sci 2019; 20:ijms20194756. [PMID: 31557884 PMCID: PMC6801686 DOI: 10.3390/ijms20194756] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2019] [Revised: 09/13/2019] [Accepted: 09/23/2019] [Indexed: 12/17/2022] Open
Abstract
Sleep apnea syndrome (SAS) is a very common disease involving intermittent hypoxia (IH), recurrent symptoms of deoxygenation during sleep, strong daytime sleepiness, and significant loss of quality of life. A number of epidemiological researches have shown that SAS is an important risk factor for insulin resistance and type 2 diabetes mellitus (DM), which is associated with SAS regardless of age, gender, or body habitus. IH, hallmark of SAS, plays an important role in the pathogenesis of SAS and experimental studies with animal and cellular models indicate that IH leads to attenuation of glucose-induced insulin secretion from pancreatic β cells and to enhancement of insulin resistance in peripheral tissues and cells, such as liver (hepatocytes), adipose tissue (adipocytes), and skeletal muscles (myocytes). In this review, we focus on IH-induced dysfunction in glucose metabolism and its underlying molecular mechanisms in several cells and tissues related to glucose homeostasis.
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Song SO, He K, Narla RR, Kang HG, Ryu HU, Boyko EJ. Metabolic Consequences of Obstructive Sleep Apnea Especially Pertaining to Diabetes Mellitus and Insulin Sensitivity. Diabetes Metab J 2019; 43:144-155. [PMID: 30993938 PMCID: PMC6470104 DOI: 10.4093/dmj.2018.0256] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/09/2018] [Accepted: 02/19/2019] [Indexed: 01/25/2023] Open
Abstract
Obstructive sleep apnea (OSA) and diabetes has been known to be closely related to each other and both diseases impact highly on the public health. There are many evidence of reports that OSA is associated with diabetes with a bidirectional correlation. A possible causal mechanism of OSA to diabetes is intermittent hypoxemia and diabetes to OSA is microvascular complication. However, OSA and diabetes have a high prevalence rate in public and shares the common overlap characteristic and risk factors such as age, obesity, and metabolic syndrome that make it difficult to establish the exact pathophysiologic mechanism between them. In addition, studies demonstrating that treatment of OSA may help prevent diabetes or improve glycemic control have not shown convincing result but have become a great field of interest research. This review outlines the bidirectional correlation between OSA and diabetes and explore the pathophysiologic mechanisms by approaching their basic etiologies.
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Affiliation(s)
- Sun Ok Song
- Epidemiologic Research and Information Center, Veterans Affairs Puget Sound Health Care System, Seattle, WA, USA
- Department of Medicine, University of Washington School of Medicine, Seattle, WA, USA
- Department of Endocrinology and Metabolism, National Health Insurance Service Ilsan Hospital, Goyang, Korea
| | - Ken He
- Sleep Medicine Section, Veterans Affairs Pittsburgh Healthcare System, Pittsburgh, PA, USA
| | - Radhika R Narla
- Department of Medicine, University of Washington School of Medicine, Seattle, WA, USA
- Division of Metabolism, Endocrinology and Nutrition, Department of Medicine, University of Washington School of Medicine, Seattle, WA, USA
| | - Hyun Goo Kang
- Department of Neurology, Chonbuk National University Medical School, Jeonju, Korea
| | - Han Uk Ryu
- Department of Neurology, Chonbuk National University Medical School, Jeonju, Korea.
| | - Edward J Boyko
- Epidemiologic Research and Information Center, Veterans Affairs Puget Sound Health Care System, Seattle, WA, USA
- Department of Medicine, University of Washington School of Medicine, Seattle, WA, USA
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Fernandez RC, Moore VM, Van Ryswyk EM, Varcoe TJ, Rodgers RJ, March WA, Moran LJ, Avery JC, McEvoy RD, Davies MJ. Sleep disturbances in women with polycystic ovary syndrome: prevalence, pathophysiology, impact and management strategies. Nat Sci Sleep 2018; 10:45-64. [PMID: 29440941 PMCID: PMC5799701 DOI: 10.2147/nss.s127475] [Citation(s) in RCA: 56] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Polycystic ovary syndrome (PCOS) is a complex endocrine disorder affecting the reproductive, metabolic and psychological health of women. Clinic-based studies indicate that sleep disturbances and disorders including obstructive sleep apnea and excessive daytime sleepiness occur more frequently among women with PCOS compared to comparison groups without the syndrome. Evidence from the few available population-based studies is supportive. Women with PCOS tend to be overweight/obese, but this only partly accounts for their sleep problems as associations are generally upheld after adjustment for body mass index; sleep problems also occur in women with PCOS of normal weight. There are several, possibly bidirectional, pathways through which PCOS is associated with sleep disturbances. The pathophysiology of PCOS involves hyperandrogenemia, a form of insulin resistance unique to affected women, and possible changes in cortisol and melatonin secretion, arguably reflecting altered hypothalamic-pituitary-adrenal function. Psychological and behavioral pathways are also likely to play a role, as anxiety and depression, smoking, alcohol use and lack of physical activity are also common among women with PCOS, partly in response to the distressing symptoms they experience. The specific impact of sleep disturbances on the health of women with PCOS is not yet clear; however, both PCOS and sleep disturbances are associated with deterioration in cardiometabolic health in the longer term and increased risk of type 2 diabetes. Both immediate quality of life and longer-term health of women with PCOS are likely to benefit from diagnosis and management of sleep disorders as part of interdisciplinary health care.
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Affiliation(s)
- Renae C Fernandez
- The University of Adelaide, Robinson Research Institute, Adelaide, SA, Australia
- The University of Adelaide, Adelaide Medical School, Adelaide, SA, Australia
- The University of Adelaide, School of Public Health, Adelaide, SA, Australia
| | - Vivienne M Moore
- The University of Adelaide, Robinson Research Institute, Adelaide, SA, Australia
- The University of Adelaide, School of Public Health, Adelaide, SA, Australia
- The University of Adelaide, Fay Gale Centre for Research on Gender, Adelaide, SA, Australia
| | - Emer M Van Ryswyk
- Adelaide Institute for Sleep Health, Flinders Centre for Research Excellence, Flinders University of South Australia, Bedford Park, SA, Australia
| | - Tamara J Varcoe
- The University of Adelaide, Robinson Research Institute, Adelaide, SA, Australia
- The University of Adelaide, Adelaide Medical School, Adelaide, SA, Australia
| | - Raymond J Rodgers
- The University of Adelaide, Robinson Research Institute, Adelaide, SA, Australia
- The University of Adelaide, Adelaide Medical School, Adelaide, SA, Australia
| | - Wendy A March
- The University of Adelaide, Robinson Research Institute, Adelaide, SA, Australia
- The University of Adelaide, School of Public Health, Adelaide, SA, Australia
| | - Lisa J Moran
- The University of Adelaide, Robinson Research Institute, Adelaide, SA, Australia
- Monash Centre for Health Research Implementation, School of Public Health and Preventive Medicine, Monash University, Melbourne, Vic, Australia
| | - Jodie C Avery
- The University of Adelaide, Robinson Research Institute, Adelaide, SA, Australia
- The University of Adelaide, Adelaide Medical School, Adelaide, SA, Australia
| | - R Doug McEvoy
- Adelaide Institute for Sleep Health, Flinders Centre for Research Excellence, Flinders University of South Australia, Bedford Park, SA, Australia
- Adelaide Sleep Health, Southern Adelaide Local Health Network, Repatriation General Hospital, Daw Park, SA, Australia
| | - Michael J Davies
- The University of Adelaide, Robinson Research Institute, Adelaide, SA, Australia
- The University of Adelaide, Adelaide Medical School, Adelaide, SA, Australia
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Wakabayashi Y, Oka R, Nakaya M, Karashima S, Kometani M, Sakurai M, Yoshimura K, Yoneda T. Associations between Sleep-Disordered Breathing and Metabolic Risk Factors beyond Obesity. J Diabetes Res 2018; 2018:1567683. [PMID: 30426019 PMCID: PMC6217749 DOI: 10.1155/2018/1567683] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/27/2018] [Revised: 09/16/2018] [Accepted: 09/18/2018] [Indexed: 12/12/2022] Open
Abstract
OBJECTIVE Individuals with multiple metabolic risk factors often experience concomitant sleep-disordered breathing (SDB). We aimed to determine the associations of SDB with individual components of metabolic syndrome independent of obesity. METHODS A cross-sectional study was conducted in 1137 employees aged 30-64 years. Apnea-hypopnea index (AHI) was assessed using a portable monitor for obstructive sleep apnea by admission. Of these, 451 participants took an oral glucose tolerance test to assess homeostatic model assessment of insulin resistance (HOMA-IR) and Matsuda insulin sensitivity index (ISI). RESULTS The odds ratio (OR) of the highest category of the AHI (≥15 episodes per hour) compared to the lowest one (<5 episodes per hour) was significantly elevated for hypertension, for hypertriglyceridemia, and for low HDL-cholesterolemia when adjusted for age, sex, and alcohol and smoking status (p < 0.05). After further adjustment for body mass index (BMI) or waist circumference, the associations for hypertension still remained statistically significant (p < 0.05) while those for hypertriglyceridemia and low HDL-cholesterolemia were no longer significant. The association between higher insulin resistance as assessed by HOMA-IR and Matsuda ISI and higher categories of the AHI was also lost after adjustment for BMI. CONCLUSION Obesity was a strong confounding factor in the association between SDB and most metabolic risk factors including insulin resistance, except for hypertension. Further longitudinal study is needed to examine the temporal or causal relationships between SDB and metabolic risk factors. This trial is registered with UMIN-CTR UMIN000028067.
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Affiliation(s)
- Yusuke Wakabayashi
- Department of Internal Medicine, Hokuriku Central Hospital, Toyama, Japan
| | - Rie Oka
- Department of Internal Medicine, Hokuriku Central Hospital, Toyama, Japan
- Internal Medicine, Kanazawa University Graduate School of Medical Science, Kanazawa, Japan
| | - Masako Nakaya
- Department of Internal Medicine, Hokuriku Central Hospital, Toyama, Japan
| | - Shigehiro Karashima
- Internal Medicine, Kanazawa University Graduate School of Medical Science, Kanazawa, Japan
| | - Mitsuhiro Kometani
- Internal Medicine, Kanazawa University Graduate School of Medical Science, Kanazawa, Japan
| | - Masaru Sakurai
- Department of Epidemiology and Public Health, Kanazawa Medical University, Japan
| | - Kenichi Yoshimura
- Department of Biostatistics, Innovative Clinical Research Center (iCREK), Kanazawa University Hospital, Kanazawa, Japan
| | - Takashi Yoneda
- Internal Medicine, Kanazawa University Graduate School of Medical Science, Kanazawa, Japan
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Omentin-A Novel Adipokine in Respiratory Diseases. Int J Mol Sci 2017; 19:ijms19010073. [PMID: 29283409 PMCID: PMC5796023 DOI: 10.3390/ijms19010073] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2017] [Revised: 12/23/2017] [Accepted: 12/26/2017] [Indexed: 02/07/2023] Open
Abstract
Adipokines, secreted by the adipose tissue, are extensively involved in the regulation and maintenance of various physiological and pathological processes, including insulin sensitivity, energy expenditure, glucose and lipid metabolism, inflammatory activity, neuroendocrine activity, immunity, cancer, homeostasis, angiogenesis, cardiovascular function, breeding and bone metabolism, and all functions of the endocrine-reproductive system axis. Omentin is a recently identified adipokine, which has become a research hotspot due to its pleiotropic effects on various diseases. However, the specific receptor for omentin has not been identified so far. In this study, we report that omentin levels fluctuate in various diseases. In addition, we have focused on the pleiotropic roles of omentin in pulmonary diseases, as it may act as a biomarker for malignant pleural mesothelioma (MPM) and is related to disease severity. Omentin may play significant roles in other pulmonary diseases, such as asthma, obstructive sleep apnea syndrome (OSAS), pulmonary arterial hypertension (PAH), acute respiratory distress syndrome (ARDS), and chronic obstructive pulmonary disease (COPD). This review summarizes the advances in current knowledge and future trends, which may provide a concise and general view on omentin and its effects on pulmonary biology.
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Ioachimescu OC, Anthony J, Constantin T, Ciavatta MM, McCarver K, Sweeney ME. VAMONOS (Veterans Affairs' Metabolism, Obstructed and Non-Obstructed Sleep) Study: Effects of CPAP Therapy on Glucose Metabolism in Patients with Obstructive Sleep Apnea. J Clin Sleep Med 2017; 13:455-466. [PMID: 28095965 DOI: 10.5664/jcsm.6502] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2016] [Accepted: 11/23/2016] [Indexed: 01/09/2023]
Abstract
STUDY OBJECTIVES Obstructive sleep apnea (OSA) and type 2 diabetes mellitus (T2DM) are prevalent disorders that pose increased risk of cardiovascular disease and death. The objective of this study was to clarify if continuous positive airway pressure (CPAP) therapy for OSA affects T2DM control and emergence. METHODS Point-of-care, comparative effectiveness study; cross-sectional and longitudinal analyses. RESULTS Our cohort included 928 consecutive patients; 13% were women; 36% were Caucasians and 61% African-Americans. OSA was diagnosed in approximately 738 patients and CPAP was initiated in 718 patients; median duration of therapy was 5 mo (25% to 75% interquartile range [IQR] 3-14). Patients with OSA used CPAP therapy for a median duration of 4.8 h, 34.5% of the nights. Adherence to CPAP was prespecified as follows: good (≥ 70% nights and ≥ 4 h/night), excellent (≥ 80% nights and ≥ 6 h/night) or outstanding (≥ 90% of nights and 8 h/night). Based on objective data, good, excellent, and outstanding compliance were found in only 30%, 20%, and 6%, respectively. Three percent of subjects without CPAP follow-up and less than 4% of those nonadherent to CPAP therapy (based on the established criteria) developed incident T2DM. Incident T2DM developed in only 0.8% of those with good compliance and in none (0%) of those in the excellent and outstanding groups. During follow-up, median weight change was +0.3 kg (IQR -1.8 to 2.7). CONCLUSIONS We found that an outstanding compliance to CPAP reduced fasting blood glucose in patients with OSA. Longitudinally, higher levels of therapeutic adherence may affect the rate of incident impaired fasting glucose, prediabetes, and T2DM, despite the observed weight gains. COMMENTARY A commentary on this article appears in this issue on page 365.
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Affiliation(s)
| | | | - Tina Constantin
- Atlanta VA Medical Center, Decatur, GA.,Emory University, Atlanta, GA
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Interactions between sleep, stress, and metabolism: From physiological to pathological conditions. ACTA ACUST UNITED AC 2015; 8:143-52. [PMID: 26779321 PMCID: PMC4688585 DOI: 10.1016/j.slsci.2015.09.002] [Citation(s) in RCA: 225] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2014] [Revised: 09/15/2015] [Accepted: 09/16/2015] [Indexed: 11/28/2022]
Abstract
Poor sleep quality due to sleep disorders and sleep loss is highly prevalent in the modern society. Underlying mechanisms show that stress is involved in the relationship between sleep and metabolism through hypothalamic–pituitary–adrenal (HPA) axis activation. Sleep deprivation and sleep disorders are associated with maladaptive changes in the HPA axis, leading to neuroendocrine dysregulation. Excess of glucocorticoids increase glucose and insulin and decrease adiponectin levels. Thus, this review provides overall view of the relationship between sleep, stress, and metabolism from basic physiology to pathological conditions, highlighting effective treatments for metabolic disturbances.
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Effects of continuous positive airway pressure therapy on glycaemic control, insulin sensitivity and body mass index in patients with obstructive sleep apnoea and type 2 diabetes: a systematic review and meta-analysis. NPJ Prim Care Respir Med 2015; 25:15005. [PMID: 25719929 PMCID: PMC4373500 DOI: 10.1038/npjpcrm.2015.5] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2014] [Revised: 12/21/2014] [Accepted: 12/28/2014] [Indexed: 12/13/2022] Open
Abstract
Background: Evidence suggests that 15–30% of individuals with obstructive sleep apnoea (OSA) have type 2 diabetes mellitus (T2DM), and that OSA is an independent risk factor for T2DM. There is considerable interest in ascertaining whether OSA treatment improves glycaemic control and insulin sensitivity in patients with OSA and T2DM. Aims: To assess the effects of continuous positive airway pressure (CPAP) therapy on glycosylated haemoglobin (HbA1c) level, insulin sensitivity and body mass index (BMI) in patients with OSA and T2DM. Methods: MEDLINE, EMBASE and the Cochrane Library were searched to identify prospective studies involving patients with OSA and T2DM who had received CPAP, and data on primary outcome (change in HbA1c) and/or secondary outcomes (changes in insulin sensitivity and BMI) were reported. All relevant studies published before 31 January 2014 were included. Results: Six studies were included in the systematic review and meta-analysis. The numbers of patients ranged from 9 to 44 (total=128), and mean age ranged from 50.7 to 66.1 years. For the change in HbA1c (six studies, 128 patients), the combined standardised paired difference revealed no significant effect of CPAP (−0.071, 95% confidence interval (CI)=−0.245, 0.103; P=0.421). Similarly, there was no significant effect of CPAP on the change in BMI (−0.102, 95% CI=−0.296, 0.092; P=0.302; five studies, 103 patients). In contrast, there was a significant effect of CPAP on the change (improvement) in insulin sensitivity (0.330, 95% CI=0.001, 0.658; P=0.049; three studies, 39 patients). Conclusion: The limited available evidence from randomised controlled trials and prospective observational studies suggests that CPAP does not decrease HbA1c level or BMI in patients with OSA and T2DM but may improve insulin sensitivity.
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Biomarkers to improve diagnosis and monitoring of obstructive sleep apnea syndrome: current status and future perspectives. Pulm Med 2014; 2014:930535. [PMID: 25538852 PMCID: PMC4265695 DOI: 10.1155/2014/930535] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2014] [Accepted: 10/23/2014] [Indexed: 02/06/2023] Open
Abstract
Obstructive sleep apnea syndrome (OSAS) is characterized by recurrent episodes of upper airway collapse associated with oxygen desaturation and sleep disruption. It is proposed that these periodic changes lead to molecular variations that can be detected by assessing serum biomarkers. Studies have identified inflammatory, oxidative, and metabolic perturbations attributable to sleep-disordered breathing. Given that OSAS is associated with increased cardiovascular and cerebrovascular morbidity, the ideal biomarker should enable timely recognition with the possibility of intervention. There is accumulating data on the utility of serum biomarkers for the evaluation of disease severity, prognosis, and response to treatment. However, current knowledge is limited by data collection techniques, disease complexity, and potential confounding factors. The current paper reviews the literature on the use of serum biomarkers in OSAS. It is concluded that the ideal serum biomarker still needs to be discovered, while caution is needed in the interpretation of hitherto available results.
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Chen L, Pei JH, Chen HM. Effects of continuous positive airway pressure treatment on glycaemic control and insulin sensitivity in patients with obstructive sleep apnoea and type 2 diabetes: a meta-analysis. Arch Med Sci 2014; 10:637-42. [PMID: 25276145 PMCID: PMC4175764 DOI: 10.5114/aoms.2014.44854] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/18/2013] [Revised: 08/12/2013] [Accepted: 10/23/2013] [Indexed: 01/19/2023] Open
Abstract
INTRODUCTION Obstructive sleep apnoea (OSA) is a prevalent disorder characterised by repetitive upper-airway obstruction during sleep, and it is associated with type 2 diabetes. Continuous positive airway pressure (CPAP) is the primary treatment for OSA. Prior studies investigating whether CPAP can improve insulin resistance or glucose control in OSA patients have resulted in conflicting findings. This meta-analysis investigated whether CPAP treatment could improve glucose metabolism and insulin resistance in patients with OSA and type 2 diabetes. MATERIAL AND METHODS We performed a systematic literature search using Medline, Cochrane, EMBASE, and Google Scholar databases for randomised controlled prospective studies that investigated the effect of CPAP on glycaemic control or insulin sensitivity in subjects with type 2 diabetes. RESULTS The combined standard (STD) paired difference in mean change in the levels of glycated haemoglobin (HbA1c) was -0.073% (standard error (SE): 0.126), indicating that CPAP treatment did not alter HbA1c levels. The combined STD paired difference in mean change of insulin sensitivity was observed as 0.552 µmol/kg • min (SE = 0.196) and indicated insulin sensitivity significantly increased with CPAP treatment (p = 0.005). CONCLUSIONS We found that the CPAP treatment did not alter HbA1c levels but did significantly improve insulin resistance, indicating treating OSA can positively impact the symptoms of type 2 diabetes.
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Affiliation(s)
- Liang Chen
- Guangdong General Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
| | - Jian-Hao Pei
- Guangdong General Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
| | - Hong-Mei Chen
- Guangdong General Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
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Meta-analysis: continuous positive airway pressure improves insulin resistance in patients with sleep apnea without diabetes. Ann Am Thorac Soc 2013; 10:115-20. [PMID: 23607839 DOI: 10.1513/annalsats.201209-081oc] [Citation(s) in RCA: 79] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
RATIONALE Obstructive sleep apnea (OSA) is an independent risk factor for the development of insulin resistance (IR). Treatment with continuous positive airway pressure (CPAP) for OSA has shown conflicting results on IR. OBJECTIVES To conduct a meta-analysis of randomized controlled trials (RCTs) that have evaluated the effect of CPAP on a validated index of IR, the homeostasis model assessment of insulin resistance (HOMA-IR). METHODS PubMed and Embase were searched through August 10, 2012. Two independent reviewers screened citations to identify trials of the effect of CPAP on HOMA-IR. Data were extracted for postintervention HOMA-IR values. MEASUREMENTS AND MAIN RESULTS A total of five studies that enrolled 244 subjects (83% male) met the inclusion criteria. None of the subjects in the included studies had diabetes. The pooled estimate of the difference in means in HOMA-IR between the CPAP and sham CPAP/control groups was -0.44 (95% confidence interval, -0.82 to -0.06; P = 0.02). The funnel plot does not suggest the presence of any publication bias. The I-squared index for the data on difference in means in HOMA-IR between the CPAP and sham CPAP/control groups was 0.00 (P = 0.61). CONCLUSIONS The pooled estimate of RCTs shows a favorable effect of CPAP on insulin resistance as measured by HOMA-IR in patients with OSA without diabetes. The effect size on HOMA-IR is modest, but not insignificant, when compared with the effects of thiazolidinedione in nondiabetic patients with metabolic syndrome. Further research and RCTs are warranted involving a larger number of patients and longer treatment periods to determine the beneficial effects of CPAP on IR.
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Rasche K, Keller T, Hader C, Leidag M, Prinz C. Impact of Obstructive Sleep Apnoea on Type 2 Diabetes and Vice Versa. EUROPEAN ENDOCRINOLOGY 2013; 9:107-109. [PMID: 29922363 PMCID: PMC6003579 DOI: 10.17925/ee.2013.09.02.107] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2013] [Accepted: 07/30/2013] [Indexed: 12/29/2022]
Abstract
Type 2 diabetes and obstructive sleep apnoea (OSA) are diseases with high prevalence and major public health impact. There is evidence that OSA is independently associated with alterations in glucose metabolism. Furthermore, OSA is a significant risk factor for the development of type 2 diabetes. Possible causes might be intermittent hypoxaemia and sleep fragmentation with increased oxidative stress and sympathetic activity, which are typical features of OSA. OSA might also be a reason for ineffective treatment of type 2 diabetes. There is further evidence that the treatment of OSA by continuous positive airway pressure (CPAP) therapy might improve glucose metabolism. On the other hand, there are also hints in the literature that type 2 diabetes might induce sleep apnoea, especially in patients with autonomic neuropathy, but that OSA also facilitates the development of neuropathy in terms of mutual interactions between OSA, type 2 diabetes and diabetic neuropathy. Based on the current scientific data, clinicians have to be aware of the relations between OSA and type 2 diabetes, both from the sleep medical and the diabetological point of view.
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Affiliation(s)
- Kurt Rasche
- Head Pulmonologist and Professor of Internal Medicine, HELIOS Clinic Wuppertal, University of Witten/Herdecke, Wuppertal, Germany
| | - Tanja Keller
- Pulmonologist, Pulmonary Practice Aeroprax Wuppertal, Germany
| | - Claus Hader
- Pulmonologist, Pulmonary Practice Aeroprax Wuppertal, Germany
| | - Markus Leidag
- Deputy Head Pulmonologist, HELIOS Clinic Wuppertal, University of Witten/Herdecke, Wuppertal, Germany
| | - Christian Prinz
- Head Internal Specialist and Professor of Internal Medicine, Chair of Internal Medicine, HELIOS Clinic Wuppertal, University of Witten/Herdecke, Wuppertal, Germany
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