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Hany M, Abouelnasr AA, Abdelkhalek MH, Ibrahim M, Aboelsoud MR, Hozien AI, Torensma B. Effects of obstructive sleep apnea on non-alcoholic fatty liver disease in patients with obesity: a systematic review. Int J Obes (Lond) 2023; 47:1200-1213. [PMID: 37696927 PMCID: PMC10663145 DOI: 10.1038/s41366-023-01378-2] [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: 03/27/2023] [Revised: 08/16/2023] [Accepted: 08/30/2023] [Indexed: 09/13/2023]
Abstract
INTRODUCTION Obesity has been linked to non-alcoholic fatty liver disease (NAFLD), a widespread chronic liver ailment, as well as obstructive sleep apnea (OSA). The development of NAFLD is influenced by repeated intermittent hypoxia, a feature of OSA. METHODS This systematic review (SR) investigated CENTRAL, PubMed, and EMBASE databases. The endpoint of this SR was to assess which OSA-related indicators could predict the presence of NAFLD and the effect of bariatric metabolic surgery (BMS) on improving OSA and NAFLD over time. RESULTS Compared to previous SRs published in 2013, 14 new publications were added to our SR, alongside studies conducted prior to 2013. The SR ultimately included 28 studies (18 cross-sectional and 10 cohort trials). In the majority of studies, significant correlations were observed between OSA, OSA-related outcomes, and NAFLD. However, the apnea-hypopnea index (AHI) alone proved to be an inadequate predictor of NAFLD. Instead, respiratory and metabolic changes were found to alleviate oxidative stress induced by hypoxemia. Six studies involved patients who underwent BMS, with one evaluating patients before and after BMS, revealing associations between increased OSA and NAFLD improvement following BMS. Six months after surgery, 100% of patients in the mild-to-moderate OSA group were free from fatty liver, and an 89% reduction was observed in the severe OSA group. CONCLUSION For the first time, BMS has been tested in treating both OSA and NAFLD pre and postoperative with positive results. Further research, ideally with histological and functional data, is needed to confirm these findings. The SR identified 14 distinct liver outcome tests; however, high heterogeneity and incomplete data precluded a meta-analysis. It is imperative to pay greater attention to the influence of OSA-related factors and uniformity in liver outcomes testing concerning NAFLD. To accomplish this, study designs should be enhanced by incorporating more comprehensive pre- and postoperative evaluations, extending follow-up periods, and employing a more consistent methodology for liver diagnosis in patients with obesity.
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Affiliation(s)
- Mohamed Hany
- Department of Surgery, Medical Research Institute, Alexandria University, Alexandria Governorate, Egypt.
- Madina Women's Hospital (IFSO certified center, European chapter), Alexandria Governorate, Egypt.
| | - Anwar Ashraf Abouelnasr
- Department of Surgery, Medical Research Institute, Alexandria University, Alexandria Governorate, Egypt
| | | | - Mohamed Ibrahim
- Department of Surgery, Medical Research Institute, Alexandria University, Alexandria Governorate, Egypt
| | - Mostafa R Aboelsoud
- Department of Surgery, Medical Research Institute, Alexandria University, Alexandria Governorate, Egypt
| | - Adel Ibrahim Hozien
- Department of Anesthesia and pain management, Medical Research Institute Alexandria University, Alexandria Governorate, Egypt
| | - Bart Torensma
- Leiden University Medical Center (LUMC), Leiden, The Netherlands
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The association between obstructive sleep apnea and non-alcoholic steatohepatitis: a retrospective nationwide inpatient sample analysis. Clin Exp Hepatol 2021; 7:25-29. [PMID: 34027112 PMCID: PMC8122103 DOI: 10.5114/ceh.2021.104488] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Accepted: 10/24/2020] [Indexed: 12/13/2022] Open
Abstract
Aim of the study The primary purpose of this study was to assess the association of obstructive sleep apnea (OSA) and non-alcoholic steatohepatitis (NASH) from a large national inpatient sample database. Material and methods We conducted a retrospective analysis using the Healthcare Cost and Utilization Project-Nationwide Inpatient Sample. OSA and NASH patients were identified using the ICD-10-CM code G47.33 and K75.81. Non-NASH patients (control) were randomly selected and matched by age and gender to each NASH patient in a 4 : 1 ratio. Weighted logistic regression models were used to calculate the association between OSA and NASH in addition to different comorbidities. Results A total of 54,169 participants were included in our analysis; 10,740 cases of NASH were matched to 43,429 controls (non-NASH). NASH was significantly higher in the white population (82.12% vs. 76.64%, p < 0.001). The prevalence of OSA among NASH patients was significantly higher compared to the control group (15.8% vs. 8.9%, adjusted OR: 1.34, 95% CI: 1.14-1.56, p = 0.0003). The prevalence of celiac disease and Crohn’s disease was significantly higher in patients with NASH (0.7% vs. 0.2%, p < 0.0002 and 1.28% vs. 0.76%, p < 0.0001). Multiple comorbidities were significantly elevated in the NASH group compared to the non-NASH group, including diabetes mellitus (DM; 36% vs. 17.6%, p < 0.0001), obesity (36.4% vs. 18.2%, p < 0.0001) and metabolic syndrome (0.86% vs. 0.06%, p < 0.0001). The mortality rate was significantly higher in the NASH group (3.8% vs. 2%, p < 0.0001). Conclusions This is the first study using the ICD-10-CM code with a specific search code for NASH. Our large population database results emphasize that there is a significant association between OSA and NASH.
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Li J, Zhang YL, Chen R, Wang Y, Xiong KP, Huang JY, Han F, Liu CF. Elevated Serum Liver Enzymes in Patients with Obstructive Sleep Apnea-hypopnea Syndrome. Chin Med J (Engl) 2015; 128:2983-7. [PMID: 26608975 PMCID: PMC4795259 DOI: 10.4103/0366-6999.168943] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2015] [Indexed: 12/22/2022] Open
Abstract
BACKGROUND Obstructive sleep apnea-hypopnea syndrome (OSAS) is associated with elevated liver enzymes and fatty liver. The purpose of this study was to measure serum liver enzyme levels in patients evaluated by polysomnography (PSG) and the factors associated with liver injury in OSAS patients. METHODS All patients referred to PSG for evaluation of sleep apnea symptoms between June 2011 and November 2014 were included in this study. Demographic data and PSG parameters were recorded. Serum alanine aminotransferase, aspartate aminotransferase, and gamma-glutamyl transferase levels were systematically measured. OSAS patients were divided into mild, moderate, and severe groups according to the apnea-hypopnea index (AHI) values of 5-14 events/h, 15-29 events/h, and ≥30 events/h. RESULTS A total of 540 patients were enrolled in this study; among these patients, 386 were male. Elevated liver enzymes were present in 42.3% of OSAS patients (32.4% in mild/moderate group; 51.0% in severe group) and 28.1% patients without OSAS. Patients with OSAS had higher body mass index (BMI) (P < 0.01). In the bivariate correlation, the liver enzymes level was negatively correlated with age and the lowest arterial oxygen saturation (SaO 2 ), and was positively correlated with BMI, oxygen desaturation index, percent of total time with oxygen saturation level <90% (TS90%), AHI, total cholesterol (TC), and triglyceride (TG). In logistic regression analysis, Age, BMI, TS90%, TC, and TG were included in the regression equation. CONCLUSIONS Our data suggest that OSAS is a risk factor for elevated liver enzymes. The severity of OSAS is correlated with liver enzyme levels; we hypothesize that hypoxia is one of main causes of liver damage in patients with OSAS.
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Affiliation(s)
- Jie Li
- Department of Neurology and Sleep Center, Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215004, China
| | - Yan-Lin Zhang
- Department of Neurology and Sleep Center, Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215004, China
| | - Rui Chen
- Department of Neurology and Sleep Center, Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215004, China
| | - Yi Wang
- Department of Neurology and Sleep Center, Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215004, China
| | - Kang-Ping Xiong
- Department of Neurology and Sleep Center, Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215004, China
| | - Jun-Ying Huang
- Department of Neurology and Sleep Center, Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215004, China
| | - Fei Han
- Department of Neurology and Sleep Center, Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215004, China
| | - Chun-Feng Liu
- Department of Neurology and Sleep Center, Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215004, China
- Institute of Neuroscience, Soochow University, Suzhou, Jiangsu 215123, China
- Beijing Key Laboratory for Parkinson's Disease, Beijing 100053, China
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Sookoian S, Pirola CJ. Obstructive sleep apnea is associated with fatty liver and abnormal liver enzymes: a meta-analysis. Obes Surg 2014. [PMID: 23740153 DOI: 10.1007/s11695-13-0981-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
BACKGROUND Obstructive sleep apnea (OSA) is associated with the cluster of clinical conditions that comprise the metabolic syndrome, including nonalcoholic fatty liver disease (NAFLD). Our primary purpose was to estimate the effect of OSA on serum alanine aminotransferase (ALT) and aspartate aminotransferase (AST). Our secondary purpose was to investigate the potential influence of OSA on histological severity of NAFLD to explore whether chronic intermittent hypoxia is associated with inflammation and fibrosis. METHODS Our literature search identified 11 studies, from which we extracted information about numbers of control subjects and OSA patients, and ALT, AST, and NAFLD. RESULTS From a total of 668 OSA patients and 404 controls, we found that the standardized difference in mean values of ALT and AST levels in patients with OSA was significantly different from that in the controls. Meta-regression showed that the association was independent of body mass index and type 2 diabetes. Fatty liver was associated with OSA in five studies with 400 subjects. OSA was significantly associated with liver fibrosis in 208 subjects, but not with lobular inflammation. CONCLUSIONS Routine assessment of liver enzymes and liver damage should be implemented in OSA patients because they have an increase of 13.3% of ALT and 4.4% of AST levels, and a 2.6-fold higher risk of liver fibrosis when they have NAFLD, which is 2.6 times more frequent in OSA patients.
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Affiliation(s)
- Silvia Sookoian
- Department of Clinical and Molecular Hepatology, Institute of Medical Research A Lanari-IDIM, University of Buenos Aires-National Council of Scientific and Technological Research (CONICET), Ciudad Autónoma de Buenos Aires, Argentina,
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Sookoian S, Pirola CJ. Obstructive sleep apnea is associated with fatty liver and abnormal liver enzymes: a meta-analysis. Obes Surg 2014; 23:1815-25. [PMID: 23740153 DOI: 10.1007/s11695-013-0981-4] [Citation(s) in RCA: 64] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
BACKGROUND Obstructive sleep apnea (OSA) is associated with the cluster of clinical conditions that comprise the metabolic syndrome, including nonalcoholic fatty liver disease (NAFLD). Our primary purpose was to estimate the effect of OSA on serum alanine aminotransferase (ALT) and aspartate aminotransferase (AST). Our secondary purpose was to investigate the potential influence of OSA on histological severity of NAFLD to explore whether chronic intermittent hypoxia is associated with inflammation and fibrosis. METHODS Our literature search identified 11 studies, from which we extracted information about numbers of control subjects and OSA patients, and ALT, AST, and NAFLD. RESULTS From a total of 668 OSA patients and 404 controls, we found that the standardized difference in mean values of ALT and AST levels in patients with OSA was significantly different from that in the controls. Meta-regression showed that the association was independent of body mass index and type 2 diabetes. Fatty liver was associated with OSA in five studies with 400 subjects. OSA was significantly associated with liver fibrosis in 208 subjects, but not with lobular inflammation. CONCLUSIONS Routine assessment of liver enzymes and liver damage should be implemented in OSA patients because they have an increase of 13.3% of ALT and 4.4% of AST levels, and a 2.6-fold higher risk of liver fibrosis when they have NAFLD, which is 2.6 times more frequent in OSA patients.
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Affiliation(s)
- Silvia Sookoian
- Department of Clinical and Molecular Hepatology, Institute of Medical Research A Lanari-IDIM, University of Buenos Aires-National Council of Scientific and Technological Research (CONICET), Ciudad Autónoma de Buenos Aires, Argentina,
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Sun Y, Yuan H, Zhao MQ, Wang Y, Xia M, Li YZ. Cardiac structural and functional changes in old elderly patients with obstructive sleep apnoea-hypopnoea syndrome. J Int Med Res 2014; 42:395-404. [PMID: 24445697 DOI: 10.1177/0300060513502890] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
OBJECTIVE To investigate cardiac structural changes in elderly patients with obstructive sleep apnoea-hypopnoea syndrome (OSAHS) and the impact on left ventricular systolic and diastolic function. METHODS The study enrolled elderly patients with OSAHS and age-matched healthy control subjects. Cardiac structure, left ventricular diastolic function and left ventricular systolic function were measured using a Doppler ultrasound scanner and compared between the two groups. RESULTS The study included 136 patients with OSAHS and 50 healthy control subjects. There were significant differences in the echocardiography indicators that reflect cardiac structure, including interventricular septum, left ventricle posterior wall thickness, and left ventricular mass and mass index between the two groups. There were significant differences between the two groups in the ventricular septal early diastolic myocardial peak velocity/late diastolic myocardial peak velocity (Em/Am), mitral annulus Em/Am, and left ventricle posterior wall Em/Am. There were also significant differences in the indicators of interventricular septum, mitral annulus and left ventricular posterior wall systolic peak velocity between the two groups. CONCLUSION Elderly patients with OSAHS demonstrated cardiac structural changes and their left ventricular diastolic and systolic functions were significantly diminished.
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Affiliation(s)
- Yi Sun
- Department of Emergency Medicine, Qilu Hospital, Shandong University, Jinan, Shandong Province, China
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Musso G, Cassader M, Olivetti C, Rosina F, Carbone G, Gambino R. Association of obstructive sleep apnoea with the presence and severity of non-alcoholic fatty liver disease. A systematic review and meta-analysis. Obes Rev 2013; 14:417-31. [PMID: 23387384 DOI: 10.1111/obr.12020] [Citation(s) in RCA: 169] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/30/2012] [Revised: 01/08/2013] [Accepted: 01/09/2013] [Indexed: 02/06/2023]
Abstract
Obstructive sleep apnoea syndrome (OSAS) and non-alcoholic fatty liver disease (NAFLD) are common in clinical practice. NAFLD encompasses simple steatosis and non-alcoholic steatohepatitis (NASH): both confer an increased risk of cardiovascular disease and diabetes; NASH increases also liver-related risk. Growing experimental evidence connects chronic intermittent hypoxia of OSAS to NAFLD. We reviewed English and non-English articles and international meeting abstracts through December 2012. Observational studies were included if they assessed OSAS by polysomnography and NAFLD by histological, radiological or biochemical criteria. Two reviewers evaluated retrieved articles by appropriate quality scores. Main outcomes were pooled using random- or fixed-effects models. The effect of age, sex and body mass index (BMI) on effect estimates was assessed by meta-regression. Eighteen cross-sectional studies (2,183 participants) were included. Pooled odds ratios (ORs) of OSAS for the presence of NAFLD, as defined by histology, radiology, and AST or ALT elevation, were 2.01(95% CI: 1.36-2.97), 2.99(1.79-4.99), 2.36(1.46-3.82) and 2.60(1.88-3.61), respectively. Pooled ORs of OSAS for NASH, fibrosis-any stage, or advanced fibrosis in biopsy-proven NAFLD patients were 2.37(1.59-3.51), 2.16(1.45-3.20) and 2.30(1.21-4.38). The magnitude and direction of effects were unaffected by age, sex and BMI. In conclusion, OSAS is associated with an increased risk of NAFLD, NASH and fibrosis. OSAS patients should be screened for the presence and severity of NAFLD.
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Affiliation(s)
- G Musso
- Gradenigo Hospital, Turin, Italy.
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Daltro C, Araújo L, Cotrim HP. Obstructive sleep apnoea and nonalcoholic fatty liver disease: risk factor or just coincidence? Liver Int 2008; 28:1047-9. [PMID: 18783546 DOI: 10.1111/j.1478-3231.2008.01819.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/13/2023]
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Jun J, Savransky V, Nanayakkara A, Bevans S, Li J, Smith PL, Polotsky VY. Intermittent hypoxia has organ-specific effects on oxidative stress. Am J Physiol Regul Integr Comp Physiol 2008; 295:R1274-81. [PMID: 18703411 DOI: 10.1152/ajpregu.90346.2008] [Citation(s) in RCA: 90] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Obstructive sleep apnea is characterized by upper airway collapse, leading to intermittent hypoxia (IH). It has been postulated that IH-induced oxidative stress may contribute to several chronic diseases associated with obstructive sleep apnea. We hypothesize that IH induces systemic oxidative stress by upregulating NADPH oxidase, a superoxide-generating enzyme. NADPH oxidase is regulated by a cytosolic p47(phox) subunit, which becomes phosphorylated during enzyme activation. Male C57BL/6J mice were exposed to IH with an inspired O(2) fraction nadir of 5% 60 times/h during the 12-h light phase (9 AM-9 PM) for 1 or 4 wk. In the aorta and heart, IH did not affect lipid peroxidation [malondialdehyde (MDA) level], nitrotyrosine level, or p47(phox) expression and phosphorylation. In contrast, in the liver, exposure to IH for 1 wk resulted in a trend to an increase in MDA levels, whereas IH for 4 wk resulted in a 38% increase in MDA levels accompanied by upregulation of p47(phox) expression and phosphorylation. Administration of an NADPH oxidase inhibitor, apocynin, during IH exposure attenuated IH-induced increases in hepatic MDA. In p47(phox)-deficient mice, MDA levels were higher at baseline and, unexpectedly, decreased during IH. In conclusion, oxidative stress levels and pathways under IH conditions are organ and duration specific.
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Affiliation(s)
- Jonathan Jun
- Division of Pulmonary and Critical Care Medicine, Johns Hopkins Asthma and Allergy Center, 5501 Hopkins Bayview Circle, Baltimore, MD 21224, USA.
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