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Mao Z, Gao ZX, Ji T, Huan S, Yin GP, Chen L. Bidirectional two-sample mendelian randomization analysis identifies causal associations of MRI-based cortical thickness and surface area relation to NAFLD. Lipids Health Dis 2024; 23:58. [PMID: 38395962 PMCID: PMC10885469 DOI: 10.1186/s12944-024-02043-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2023] [Accepted: 02/05/2024] [Indexed: 02/25/2024] Open
Abstract
BACKGROUND Non-alcoholic fatty liver disease (NAFLD) patients have exhibited extra-hepatic neurological changes, but the causes and mechanisms remain unclear. This study investigates the causal effect of NAFLD on cortical structure through bidirectional two-sample Mendelian randomization analysis. METHODS Genetic data from 778,614 European individuals across four NAFLD studies were used to determine genetically predicted NAFLD. Abdominal MRI scans from 32,860 UK Biobank participants were utilized to evaluate genetically predicted liver fat and volume. Data from the ENIGMA Consortium, comprising 51,665 patients, were used to evaluate the associations between genetic susceptibility, NAFLD risk, liver fat, liver volume, and alterations in cortical thickness (TH) and surface area (SA). Inverse-variance weighted (IVW) estimation, Cochran Q, and MR-Egger were employed to assess heterogeneity and pleiotropy. RESULTS Overall, NAFLD did not significantly affect cortical SA or TH. However, potential associations were noted under global weighting, relating heightened NAFLD risk to reduced parahippocampal SA and decreased cortical TH in the caudal middle frontal, cuneus, lingual, and parstriangularis regions. Liver fat and volume also influenced the cortical structure of certain regions, although no Bonferroni-adjusted p-values reached significance. Two-step MR analysis revealed that liver fat, AST, and LDL levels mediated the impact of NAFLD on cortical structure. Multivariable MR analysis suggested that the impact of NAFLD on the cortical TH of lingual and parstriangularis was independent of BMI, obesity, hyperlipidemia, and diabetes. CONCLUSION This study provides evidence that NAFLD causally influences the cortical structure of the brain, suggesting the existence of a liver-brain axis in the development of NAFLD.
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Affiliation(s)
- Zun Mao
- Jiangsu Key Laboratory for Molecular and Medical Biotechnology, College of Life Sciences, Nanjing Normal University, Nanjing, 210023, P. R. China
| | - Zhi-Xiang Gao
- Jiangsu Key Laboratory for Molecular and Medical Biotechnology, College of Life Sciences, Nanjing Normal University, Nanjing, 210023, P. R. China
| | - Tong Ji
- Jiangsu Key Laboratory for Molecular and Medical Biotechnology, College of Life Sciences, Nanjing Normal University, Nanjing, 210023, P. R. China
| | - Sheng Huan
- Department of Anesthesiology and Perioperative Medicine, the First Affiliated Hospital of Nanjing Medical University, Nanjing, 210000, P. R. China
| | - Guo-Ping Yin
- Department of Anesthesiology, Nanjing Second Hospital, Nanjing, 210000, P. R. China.
| | - Long Chen
- Jiangsu Key Laboratory for Molecular and Medical Biotechnology, College of Life Sciences, Nanjing Normal University, Nanjing, 210023, P. R. China.
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Deng Y, Huang J, Wong MCS. Associations of non-alcoholic fatty liver disease and cirrhosis with liver cancer in European and East Asian populations: A Mendelian randomization study. Cancer Rep (Hoboken) 2024; 7:e1913. [PMID: 37840448 PMCID: PMC10809194 DOI: 10.1002/cnr2.1913] [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] [Received: 07/14/2023] [Revised: 08/27/2023] [Accepted: 10/02/2023] [Indexed: 10/17/2023] Open
Abstract
BACKGROUND The positive relationships of non-alcoholic fatty liver disease (NAFLD) and cirrhosis with liver cancer were shown in previous observational studies, while further Mendelian randomization (MR) investigations are needed to confirm the possible causal associations. AIMS This study aimed to explore whether NAFLD and cirrhosis were causally related to liver cancer using MR in European and East Asian populations. METHODS AND RESULTS For European populations, NAFLD data were obtained from a genome-wide meta-analysis (8434 patients and 770 180 controls). The data on chronic elevation of alanine aminotransferase (cALT), a proxy of NAFLD, were derived from Million Veteran Program (68 725 patients and 95 472 controls). Cirrhosis data were collected from two sources: a genome-wide association study of five cohorts (4829 patients and 72 705 controls) and FinnGen (1931 patients and 216 861 controls). Liver cancer data were collected from FinnGen (304 patients and 174 006 controls). For East Asian populations, the data on cirrhosis (2184 patients and 210 269 controls) and hepatocellular carcinoma (1866 patients and 195 745 controls) were obtained from Biobank Japan. Three, 41, seven, six, and three single-nucleotide polymorphisms were used for NAFLD (European), cALT (European), cirrhosis (European-five cohorts), cirrhosis (European-FinnGen), and cirrhosis (East Asian), respectively. We used inverse-variance weighted as the primary method to calculate the odds ratio (OR) and 95% confidence interval (CI). Among European populations, genetically-predicted NAFLD, cALT, cirrhosis (five cohorts), and cirrhosis (FinnGen) were positively associated with liver cancer, with ORs (95% CIs) of 6.62 (3.81-11.50) (p < .001), 2.59 (1.70-3.94) (p < .001), 3.38 (2.41-4.75) (p < .001), and 2.62 (1.20-5.72) (p = .015). Among East Asian populations, there was also a positive association between genetically-predicted cirrhosis and hepatocellular carcinoma (OR = 2.12; 95% CI = 1.78-2.52; p < .001). CONCLUSION This study utilized MR to complementarily confirm the positive connections of NAFLD and cirrhosis with liver cancer, as identified in earlier observational research. Subsequent MR investigations involving more liver cancer cases are needed.
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Affiliation(s)
- Yunyang Deng
- The Jockey Club School of Public Health and Primary Care, Faculty of MedicineThe Chinese University of Hong KongHong Kong SARChina
| | - Junjie Huang
- The Jockey Club School of Public Health and Primary Care, Faculty of MedicineThe Chinese University of Hong KongHong Kong SARChina
| | - Martin Chi Sang Wong
- The Jockey Club School of Public Health and Primary Care, Faculty of MedicineThe Chinese University of Hong KongHong Kong SARChina
- School of Public HealthThe Chinese Academy of Medical Sciences and Peking Union Medical CollegeBeijingChina
- School of Public HealthPeking UniversityBeijingChina
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Wu J, Guo J, Wang A, Zhang Y, Wu S, Zhao X. Lack of association between nonalcoholic fatty liver disease and intracerebral hemorrhage: A community-based cohort study. J Clin Neurosci 2023; 118:7-11. [PMID: 37832266 DOI: 10.1016/j.jocn.2023.09.027] [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] [Received: 03/14/2023] [Revised: 09/24/2023] [Accepted: 09/28/2023] [Indexed: 10/15/2023]
Abstract
BACKGROUND The association between nonalcoholic fatty liver disease (NAFLD) and intracerebral hemorrhage (ICH) remains unclear. This study aimed to investigate whether NAFLD and its severity predict incident ICH. METHODS Participants free of other liver diseases, prior stroke, myocardial infarction, cancer, or alcohol abuse in the Kailuan cohort were enrolled in this study. Abdominal ultrasonography was used to diagnose NAFLD and assess its severity. Participants were stratified into different groups including nonfatty liver, mild, moderate and severe NAFLD. Multivariable Cox proportional hazards regression models were used to evaluate the hazard ratios (HRs) and 95% CIs of ICH events in the 11-year follow-up. RESULTS A total of 77,461 participants were enrolled in our study. Among them, NAFLD was diagnosed in 23,890 (30.83 %) participants, including 15,581 (20.11 %) with mild NAFLD, 6839 (8.83 %) with moderate NAFLD and 1470 (1.90 %) with severe NAFLD. We documented 692 ICH events during 848,579 person years of follow-up. Patients with more severe NAFLD tended to be older, had higher levels of BMI, higher proportions of hypertension, diabetes and other known risk factors for cerebrovascular disease. However, there was no significant associations between NAFLD, its severity and incident ICH events. Relative to nonfatty liver participants, the HRs for participants with mild NAFLD, moderate and severe NAFLD were 0.98 (95 % CI, 0.80 to 1.20), 1.19 (95 % CI, 0.92 to 1.54) and 1.29 (95 % CI, 0.81 to 2.06), respectively. CONCLUSIONS NAFLD and its severity did not appear to be significantly associated with ICH after adjustment for potential risk factors.
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Affiliation(s)
- Jianwei Wu
- Department of Neurology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China; China National Clinical Research Center for Neurological Diseases, Beijing Tiantan Hospital, Capital Medical University, Beijing, China; Research Unit of Artificial Intelligence in Cerebrovascular Disease, Chinese Academy of Medical Sciences, Beijing, China
| | - Jiahuan Guo
- Department of Neurology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China; China National Clinical Research Center for Neurological Diseases, Beijing Tiantan Hospital, Capital Medical University, Beijing, China; Research Unit of Artificial Intelligence in Cerebrovascular Disease, Chinese Academy of Medical Sciences, Beijing, China
| | - Anxin Wang
- Department of Neurology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China; China National Clinical Research Center for Neurological Diseases, Beijing Tiantan Hospital, Capital Medical University, Beijing, China; Research Unit of Artificial Intelligence in Cerebrovascular Disease, Chinese Academy of Medical Sciences, Beijing, China
| | - Yijun Zhang
- Department of Neurology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China; China National Clinical Research Center for Neurological Diseases, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Shouling Wu
- Department of Cardiology, Kailuan Hospital, North China University of Science and Technology, China.
| | - Xingquan Zhao
- Department of Neurology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China; China National Clinical Research Center for Neurological Diseases, Beijing Tiantan Hospital, Capital Medical University, Beijing, China; Research Unit of Artificial Intelligence in Cerebrovascular Disease, Chinese Academy of Medical Sciences, Beijing, China; Center of Stroke, Beijing Institute of Brain Disorders, Capital Medical University, Beijing, China.
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Lee Y, Seo JH. Potential Causal Association between Elevated Gamma-Glutamyl Transferase Level and Stroke: A Two-Sample Mendelian Randomization Study. Biomolecules 2023; 13:1592. [PMID: 38002274 PMCID: PMC10669367 DOI: 10.3390/biom13111592] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Revised: 10/22/2023] [Accepted: 10/27/2023] [Indexed: 11/26/2023] Open
Abstract
Researchers have suggested a potential relationship between gamma-glutamyl transferase (GGT) level and stroke. We investigated a potential causal relationship between GGT level as exposures and stroke and stroke subtypes (cardioembolic, small vessel, and large artery) in a European population. We performed a two-sample Mendelian randomization (MR) study using the genome-wide association study (GWAS) data from the UK Biobank as the exposure set. For the outcome set, we used stroke in the GWAS data from the GIGASTROKE Consortium. We considered alcohol consumption, atrial fibrillation, and body mass index as confounders. We used PhenoScanner searches for removal of SNPs and multivariable MR analysis for assessing confounders. We observed significant causal associations between GGT level and stroke (odds ratio [OR] = 1.23, 95% CI = [1.05-1.44], and p = 0.012 with IVW; OR = 1.19, 95% CI= [1.02-1.39], and p = 0.031 with MR-PRESSO). These results were consistent after removing SNPs related to confounding factors. Similarly, in multivariable MR, GGT was associated with stroke after adjusting for confounding factors (OR = 1.30, 95% CI 1.07-1.60), p = 0.010). Because GGT level has a causal relationship with stroke, researchers should test its significance as a potential risk factor for stroke. Additional research is required to validate these results.
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Affiliation(s)
- Young Lee
- Veterans Medical Research Institute, Veterans Health Service Medical Center, Seoul 05368, Republic of Korea;
- Department of Applied Statistics, Chung-Ang University, Seoul 06974, Republic of Korea
| | - Je Hyun Seo
- Veterans Medical Research Institute, Veterans Health Service Medical Center, Seoul 05368, Republic of Korea;
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Lim J, Sang H, Kim HI. Impact of metabolic risk factors on hepatic and cardiac outcomes in patients with alcohol- and non-alcohol-related fatty liver disease. JHEP Rep 2023; 5:100721. [PMID: 37138675 PMCID: PMC10149369 DOI: 10.1016/j.jhepr.2023.100721] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/07/2022] [Revised: 01/31/2023] [Accepted: 02/18/2023] [Indexed: 05/05/2023] Open
Abstract
Background & Aims Metabolic risk factors (MetRs) are associated with hepatic and cardiac outcomes in patients with fatty liver disease (FLD). We evaluated whether MetRs have different effects on alcoholic FLD (AFLD) and non-alcoholic FLD (NAFLD). Methods We used a standardised common data model to analyse data from seven university hospital databases between 2006 and 2015. MetRs included diabetes mellitus, hypertension, dyslipidaemia, and obesity. Follow-up data were analysed for the incidence of hepatic outcomes, cardiac outcomes, and death in patients with AFLD or NAFLD and based on MetRs within AFLD and NAFLD. Results Out of 3,069 and 17,067 patients with AFLD and NAFLD, respectively, 2,323 (75.7%) and 13,121 (76.9%) had one or more MetR, respectively. Patients with AFLD were at a higher risk of hepatic outcomes (adjusted risk ratio [aRR], 5.81) compared with those with NAFLD irrespective of MetR. The risk of cardiac outcomes in AFLD and NAFLD became similar with the increasing number of MetRs. Patients with NAFLD without MetRs demonstrated a lower risk of cardiac outcomes, but not hepatic outcomes, compared with those with MetRs (aRR, 0.66 and 0.61 for MetR ≥1 and MetR ≥2, respectively; p <0.05). In patients with AFLD, hepatic and cardiac outcomes were not associated with MetRs. Conclusions The clinical impact of MetRs in patients with FLD may differ between patients with AFLD and those with NAFLD. Impact and Implications With the increasing prevalence of fatty liver disease (FLD) and metabolic syndrome, the increase in associated complications, such as liver and heart diseases, has become an important social issue. Particularly in patients with FLD with excessive alcohol consumption, the incidence of liver and heart disease is pronounced because of the dominant effect of alcohol over the effects of other factors. Thus, appropriate screening and management of alcohol consumption in patients with FLD are vital.
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Affiliation(s)
- Jihye Lim
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, The Catholic University College of Medicine, Seoul, Republic of Korea
| | - Hyunji Sang
- Department of Endocrinology and Metabolism, Kyung Hee University Hospital, Kyung Hee University School of Medicine, Seoul, Republic of Korea
| | - Ha Il Kim
- Department of Gastroenterology and Hepatology, Hanyang University Guri Hospital, Guri, Republic of Korea
- Corresponding author. Address: Department of Gastroenterology and Hepatology, Hanyang University Guri Hospital, 153 Gyeongchun-ro, 11923, Guri, Republic of Korea. Tel.: +82-31-560-2232.
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Armandi A, Bugianesi E. Extrahepatic Outcomes of Nonalcoholic Fatty Liver Disease: Cardiovascular Diseases. Clin Liver Dis 2023; 27:239-250. [PMID: 37024205 DOI: 10.1016/j.cld.2023.01.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/08/2023]
Abstract
Patients with nonalcoholic fatty liver disease (NAFLD) are at high risk of cardiovascular disease, including carotid atherosclerosis, coronary artery disease, heart failure, and arrhythmias. The risk is partially due to shared risk factors, but it may vary according to liver injury. A fatty liver may induce an atherogenic profile, the local necro-inflammatory changes of nonalcoholic steatohepatitis may enhance systemic metabolic inflammation, and fibrogenesis can run parallel in the liver and in the myocardium and precedes heart failure. The detrimental impact of a Western diet combines with polymorphisms in genes associated with atherogenic dyslipidemia. Shared clinical/diagnostic algorithms are needed to manage the cardiovascular risk in NAFLD.
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Affiliation(s)
- Angelo Armandi
- Department of Medical Sciences, University of Turin, Corso Dogliotti 14, Torino 10126, Italy
| | - Elisabetta Bugianesi
- Department of Medical Sciences, University of Turin, Corso Dogliotti 14, Torino 10126, Italy.
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Manikat R, Nguyen MH. Nonalcoholic fatty liver disease and non-liver comorbidities. Clin Mol Hepatol 2023; 29:s86-s102. [PMID: 36603574 PMCID: PMC10029963 DOI: 10.3350/cmh.2022.0442] [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: 12/09/2022] [Accepted: 01/03/2023] [Indexed: 01/07/2023] Open
Abstract
Non-alcoholic fatty liver disease (NAFLD) is a chronic liver disease characterized by excess fat accumulation in the liver. It is closely associated with metabolic syndrome, and patients with NAFLD often have comorbidities such as obesity, type 2 diabetes mellitus, and dyslipidemia. In addition to liver-related complications, NAFLD has been associated with a range of non-liver comorbidities, including cardiovascular disease, chronic kidney disease, and sleep apnea. Cardiovascular disease is the most common cause of mortality in patients with NAFLD, and patients with NAFLD have a higher risk of developing cardiovascular disease than the general population. Chronic kidney disease is also more common in patients with NAFLD, and the severity of NAFLD is associated with a higher risk of developing chronic kidney disease. Sleep apnea, a disorder characterized by breathing interruptions during sleep, is also more common in patients with NAFLD and is associated with the severity of NAFLD. The presence of non-liver comorbidities in patients with NAFLD has important implications for the management of this disease. Treatment of comorbidities such as obesity, type 2 diabetes mellitus, and dyslipidemia may improve liver-related outcomes in patients with NAFLD. Moreover, treatment of non-liver comorbidities may also improve overall health outcomes in patients with NAFLD. Therefore, clinicians should be aware of the potential for non-liver comorbidities in patients with NAFLD and should consider the management of these comorbidities as part of the overall management of this disease.
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Affiliation(s)
- Richie Manikat
- Division of Gastroenterology and Hepatology, Stanford University Medical Center, Palo Alto, CA, USA
| | - Mindie H Nguyen
- Division of Gastroenterology and Hepatology, Stanford University Medical Center, Palo Alto, CA, USA
- Department of Epidemiology and Population Health, Stanford University School of Medicine, Stanford, CA, USA
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Zhang Y, Yang Y, Feng Y, Chen Z, He L, Xie S, Shi J, Yang B, Tang Y. The association between liver fibrosis and depression in patients after ischemic stroke. BMC Neurol 2023; 23:50. [PMID: 36721101 PMCID: PMC9887868 DOI: 10.1186/s12883-023-03091-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2022] [Accepted: 01/27/2023] [Indexed: 02/02/2023] Open
Abstract
BACKGROUND AND OBJECTIVE Liver fibrosis has been considered a predictor of cardiovascular disease. This study aimed to evaluate whether the degree of liver fibrosis is related to post-stroke depression (PSD) at 3 months follow-up. METHODS We prospectively and continuously enrolled patients with first-ever ischemic stroke from June 2020 to January 2022. Liver fibrosis was measured after admission by calculating the Fibrosis-4 index (FIB-4) and stratified into two categories (< 2.67 versus ≥ 2.67). Patients with a 17-item Hamilton Depression Scale score > 7 were further evaluated using the Chinese version of the structured clinical interview of DSM-IV, for diagnosing PSD at 3 months. RESULTS A total of 326 patients (mean age 66.6 years, 51.5% male) were recruited for the study. As determined by the FIB-4 score, 80 (24.5%) patients had advanced liver fibrosis. During the follow-up, PSD was observed in 91 patients, which accounted for 27.9% (95% confidence interval [CI] 25.5%-30.5%) of the cohort. The prevalence of advanced liver fibrosis was higher in PSD patients than those without PSD (40.0% versus 24.0%; P = 0.006). After adjustment for covariates in the multivariate logistic analysis, advanced fibrosis was significantly associated with PSD (odds ratio [OR], 1.88; 95% CI, 1.03-3.42; P = 0.040). Similar results were found when the FIB-4 was analyzed as a continuous variable. CONCLUSIONS This study found that advanced liver fibrosis was associated with an increased risk of 3-month PSD. FIB-4 score may be valuable for screening depressive symptoms in ischemic stroke patients.
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Affiliation(s)
- Yun Zhang
- grid.490255.f0000 0004 7594 4364Department of Psychosomatic Medicine, School of Medicine, Mianyang Central Hospital, University of Electronic Science and Technology of China, 12 Changjia Alley, Mianyang, 621000 Sichuan China
| | - Yao Yang
- grid.490255.f0000 0004 7594 4364Department of Psychosomatic Medicine, School of Medicine, Mianyang Central Hospital, University of Electronic Science and Technology of China, 12 Changjia Alley, Mianyang, 621000 Sichuan China
| | - Yue Feng
- grid.490255.f0000 0004 7594 4364Department of Clinical Laboratory, School of Medicine, Mianyang Central Hospital, University of Electronic Science and Technology of China, Mianyang, 621000 Sichuan China
| | - Zhonglun Chen
- grid.490255.f0000 0004 7594 4364Department of Neurology, School of Medicine, Mianyang Central Hospital, University of Electronic Science and Technology of China, 12 Changjia Alley, Mianyang, 621000 Sichuan China
| | - Lin He
- grid.490255.f0000 0004 7594 4364Department of Psychosomatic Medicine, School of Medicine, Mianyang Central Hospital, University of Electronic Science and Technology of China, 12 Changjia Alley, Mianyang, 621000 Sichuan China
| | - Shu Xie
- grid.490255.f0000 0004 7594 4364Department of Psychosomatic Medicine, School of Medicine, Mianyang Central Hospital, University of Electronic Science and Technology of China, 12 Changjia Alley, Mianyang, 621000 Sichuan China
| | - Jian Shi
- grid.490255.f0000 0004 7594 4364Department of Psychosomatic Medicine, School of Medicine, Mianyang Central Hospital, University of Electronic Science and Technology of China, 12 Changjia Alley, Mianyang, 621000 Sichuan China
| | - Bufan Yang
- grid.490255.f0000 0004 7594 4364Department of Neurology, School of Medicine, Mianyang Central Hospital, University of Electronic Science and Technology of China, 12 Changjia Alley, Mianyang, 621000 Sichuan China
| | - Yufeng Tang
- grid.490255.f0000 0004 7594 4364Department of Neurology, School of Medicine, Mianyang Central Hospital, University of Electronic Science and Technology of China, 12 Changjia Alley, Mianyang, 621000 Sichuan China
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Zhou XD, Cai J, Targher G, Byrne CD, Shapiro MD, Sung KC, Somers VK, Chahal CAA, George J, Chen LL, Zhou Y, Zheng MH. Metabolic dysfunction-associated fatty liver disease and implications for cardiovascular risk and disease prevention. Cardiovasc Diabetol 2022; 21:270. [PMID: 36463192 PMCID: PMC9719631 DOI: 10.1186/s12933-022-01697-0] [Citation(s) in RCA: 45] [Impact Index Per Article: 22.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Accepted: 11/14/2022] [Indexed: 12/07/2022] Open
Abstract
The newly proposed term "metabolic dysfunction-associated fatty liver disease" (MAFLD) is replacing the old term "non-alcoholic fatty liver disease" (NAFLD) in many global regions, because it better reflects the pathophysiology and cardiometabolic implications of this common liver disease. The proposed change in terminology from NAFLD to MAFLD is not simply a single-letter change in an acronym, since MAFLD is defined by a set of specific and positive diagnostic criteria. In particular, the MAFLD definition specifically incorporates within the classification recognized cardiovascular risk factors. Although convincing evidence supports a significant association between both NAFLD and MAFLD, with increased risk of CVD morbidity and mortality, neither NAFLD nor MAFLD have received sufficient attention from the Cardiology community. In fact, there is a paucity of scientific guidelines focusing on this common and burdensome liver disease from cardiovascular professional societies. This Perspective article discusses the rationale and clinical relevance for Cardiologists of the newly proposed MAFLD definition.
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Affiliation(s)
- Xiao-Dong Zhou
- grid.414906.e0000 0004 1808 0918Department of Cardiovascular Medicine, the Heart Center, the First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Jingjing Cai
- grid.216417.70000 0001 0379 7164Department of Cardiology, the Third Xiangya Hospital, Central South University, Changsha, China
| | - Giovanni Targher
- grid.5611.30000 0004 1763 1124Department of Medicine, Section of Endocrinology, Diabetes, and Metabolism, University of Verona, Verona, Italy
| | - Christopher D. Byrne
- grid.123047.30000000103590315Southampton National Institute for Health and Care Research Biomedical Research Centre, University Hospital Southampton, Southampton General Hospital, Southampton, UK
| | - Michael D. Shapiro
- grid.241167.70000 0001 2185 3318Center for Prevention of Cardiovascular Disease, Section On Cardiovascular Medicine, Wake Forest University School of Medicine, Winston-Salem, NC USA
| | - Ki-Chul Sung
- grid.264381.a0000 0001 2181 989XDepartment of Internal Medicine, Division of Cardiology, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Virend K. Somers
- grid.66875.3a0000 0004 0459 167XDepartment of Cardiovascular Medicine, Mayo Clinic College of Medicine, Rochester, USA
| | - C. Anwar A. Chahal
- grid.411115.10000 0004 0435 0884Division of Cardiovascular Medicine, Hospital of the University of Pennsylvania, Philadelphia, PA USA
| | - Jacob George
- grid.1013.30000 0004 1936 834XStorr Liver Centre, Westmead Institute for Medical Research, Westmead Hospital and University of Sydney, Sydney, NSW Australia
| | - Li-Li Chen
- grid.414906.e0000 0004 1808 0918MAFLD Research Center, Department of Hepatology, the First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Yong Zhou
- grid.16821.3c0000 0004 0368 8293Clinical Research Institute, Shanghai General Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Ming-Hua Zheng
- grid.414906.e0000 0004 1808 0918MAFLD Research Center, Department of Hepatology, the First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China ,grid.268099.c0000 0001 0348 3990Institute of Hepatology, Wenzhou Medical University, Wenzhou, China ,Key Laboratory of Diagnosis and Treatment for the Development of Chronic Liver Disease in Zhejiang Province, Wenzhou, China
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Yi M, Peng W, Feng X, Teng F, Tang Y, Kong Q, Chen Z. Extrahepatic morbidities and mortality of NAFLD: an umbrella review of meta-analyses. Aliment Pharmacol Ther 2022; 56:1119-1130. [PMID: 35989292 DOI: 10.1111/apt.17165] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Revised: 05/08/2022] [Accepted: 07/16/2022] [Indexed: 01/30/2023]
Abstract
BACKGROUND Nonalcoholic fatty liver disease (NAFLD) has reached pandemic proportions currently and may contribute to multiple extrahepatic outcomes. AIM To comprehensively summarise evidence of associations between NAFLD and risk of extrahepatic outcomes. METHODS We conducted an umbrella review. We searched PubMed, Web of Science and Cochrane database from inception to 27 November 2021. RESULTS We included 22 meta-analyses with 374 original studies in our analysis. Subjects with NAFLD had an increased risk of mortality, multiple cardiovascular complications, extrahepatic cancers, diabetes and chronic kidney disease (CKD) than those without NAFLD. Excess risks of several other extrahepatic outcomes including hypothyroidism, urolithiasis, gastro-oesophageal reflux disease, gallstones, depression and worse maternal and foetal outcomes were also observed in this population. However, associations were not significant for prostate cancer, female organ genital cancer, haematological cancer, diabetic retinopathy or osteoporotic fracture. The risks of CVD, diabetes and CKD were similar in obese and non-obese patients. Most associations were heterogeneous across regions; significantly, Europeans with NAFLD were more prone to all-cause mortality than North Americans. The certainty of evidence was graded from only very low to moderate as all included studies were observational. CONCLUSIONS Patients with NAFLD are at heightened risk of extrahepatic outcomes. However, the certainty of evidence is only from very low to moderate. Further studies at low risk of bias are required to support the evidence and elucidate any causal associations.
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Affiliation(s)
- Mengshi Yi
- Department of Hepatic Surgery, West China Hospital, Sichuan University, Chengdu, China
| | - Wei Peng
- Department of Hepatic Surgery, West China Hospital, Sichuan University, Chengdu, China
| | - Xi Feng
- Department of Hepatic Surgery, West China Hospital, Sichuan University, Chengdu, China
| | - Fei Teng
- Department of Hepatic Surgery, West China Hospital, Sichuan University, Chengdu, China
| | - Youyin Tang
- Department of Vascular Surgery, West China Hospital, Sichuan University, Chengdu, China
| | - Qingyan Kong
- Department of Hepatic Surgery, West China Hospital, Sichuan University, Chengdu, China
| | - Zheyu Chen
- Department of Hepatic Surgery, West China Hospital, Sichuan University, Chengdu, China
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Liu Z, Suo C, Fan H, Zhang T, Jin L, Chen X. Dissecting causal relationships between nonalcoholic fatty liver disease proxied by chronically elevated alanine transaminase levels and 34 extrahepatic diseases. Metabolism 2022; 135:155270. [PMID: 35914620 DOI: 10.1016/j.metabol.2022.155270] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/10/2022] [Revised: 07/25/2022] [Accepted: 07/26/2022] [Indexed: 12/27/2022]
Abstract
BACKGROUND Nonalcoholic fatty liver disease (NAFLD) is prevalent worldwide and is associated with the risk of many extrahepatic diseases. However, whether NAFLD is a risk marker or a common cause of extrahepatic diseases is unclear. METHODS We searched PubMed to identify NAFLD-related extrahepatic diseases. Genetic instrumental variables (IVs) for NAFLD surrogated by chronically elevated alanine transaminase levels and eligible extrahepatic diseases were retrieved from the corresponding genome-wide association analysis. We proposed a procedure for Mendelian randomization (MR) analysis and performed validation analyses to dissect the association between NAFLD and extrahepatic diseases. The Bonferroni method was used to correct the bias of multiple testing. RESULTS In total, 34 extrahepatic diseases were included and 54 SNPs were used as IVs for NAFLD. The MR analysis gave a robust and significant (or suggestive) estimate for the association between NAFLD and 9 extrahepatic diseases: type 2 diabetes (odds ratio [OR] = 1.182, 95 % confidence interval [CI] 1.125-1.243, P = 5.40 × 10-11), cholelithiasis (OR = 1.171, 95%CI 1.083-1.266, P = 7.47 × 10-5), diabetic hypoglycemia (OR = 1.170, 95%CI 1.071-1.279, P = 5.14 × 10-4), myocardial infarction (OR = 1.122, 95%CI 1.057-1.190, P = 1.46 × 10-4), hypertension (OR = 1.060, 95%CI 1.029-1.093, P = 1.18 × 10-4), coronary artery disease (OR = 1.052, 95%CI 1.010-1.097, P = 1.58 × 10-2), heart failure (OR = 1.047, 95%CI 1.006-1.090, P = 2.44 × 10-2), dementia (OR = 0.881, 95%CI 0.806-0.962, P = 5.01 × 10-3), and pancreatic cancer (OR = 0.802, 95%CI 0.654-0.983, P = 3.32 × 10-2). Validation analyses using IVs from biopsy-confirmed and imaging-determined NAFLD reported similar results to the main analysis. For the remaining 25 outcomes, no significant or definitive association was yielded in MR analysis. CONCLUSIONS Genetic evidence suggests putative causal relationships between NAFLD and a set of extrahepatic diseases, indicating that NAFLD deserves high priority in clinical practice.
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Affiliation(s)
- Zhenqiu Liu
- State Key Laboratory of Genetic Engineering, Human Phenome Institute, School of Life Sciences, Fudan University, Shanghai 200438, China; Fudan University Taizhou Institute of Health Sciences, Taizhou 225316, China
| | - Chen Suo
- Key Laboratory of Public Health Safety, Fudan University, Ministry of Education, Shanghai 200032, China; Department of Epidemiology, School of Public Health, Fudan University, Shanghai 200032, China
| | - Hong Fan
- Key Laboratory of Public Health Safety, Fudan University, Ministry of Education, Shanghai 200032, China; Department of Epidemiology, School of Public Health, Fudan University, Shanghai 200032, China
| | - Tiejun Zhang
- Key Laboratory of Public Health Safety, Fudan University, Ministry of Education, Shanghai 200032, China; Department of Epidemiology, School of Public Health, Fudan University, Shanghai 200032, China
| | - Li Jin
- State Key Laboratory of Genetic Engineering, Human Phenome Institute, School of Life Sciences, Fudan University, Shanghai 200438, China; Fudan University Taizhou Institute of Health Sciences, Taizhou 225316, China
| | - Xingdong Chen
- State Key Laboratory of Genetic Engineering, Human Phenome Institute, School of Life Sciences, Fudan University, Shanghai 200438, China; Fudan University Taizhou Institute of Health Sciences, Taizhou 225316, China; National Clinical Research Center for Aging and Medicine, Huashan Hospital, Fudan University, Shanghai 200040, China.
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12
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Peng H, Wang S, Wang M, Ye Y, Xue E, Chen X, Wang X, Fan M, Gao W, Qin X, Wu Y, Chen D, Li J, Hu Y, Wang L, Wu T. Nonalcoholic fatty liver disease and cardiovascular diseases: A Mendelian randomization study. Metabolism 2022; 133:155220. [PMID: 35618017 DOI: 10.1016/j.metabol.2022.155220] [Citation(s) in RCA: 23] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Revised: 05/16/2022] [Accepted: 05/19/2022] [Indexed: 12/20/2022]
Abstract
BACKGROUND Evidence suggests that nonalcoholic fatty liver disease (NAFLD) is associated with cardiovascular diseases (CVDs). However, the results are inconsistent, and the causality remains to be established. OBJECTIVE We aimed to investigate the potential causal relationship between NAFLD and CVDs, including arterial stiffness, coronary artery disease, heart failure, stroke, ischemic stroke and its subtypes using two-sample Mendelian randomization (MR). METHODS Genetic instruments were used as proxies for NAFLD. Publicly available summary-level data were obtained from the UK Biobank, the CARDIoGRAMplusC4D Consortium, the MEGASTROKE Consortium, and other consortia. Six complementary MR methods were performed, including inverse variance weighted method (IVW), MR-Egger, weighted median, weighted mode, MR-PRESSO, and MR-RAPS. RESULTS NAFLD was significantly associated with arterial stiffness (β = 0.04 [95%CI, 0.02-0.06], P = 5.53E-04). Moreover, the results remained consistent and robust in the sensitivity analysis. As for heart failure, the IVW method suggested that NAFLD was significantly associated with heart failure (OR = 1.08, 95%CI: 1.02-1.14, P = 0.005) in the absence of pleiotropy. However, there were no significant associations of NAFLD with coronary artery disease, stroke, ischemic stroke, or any ischemic stroke subtype. CONCLUSION The MR study supported the causal effect of NAFLD on arterial stiffness. However, the study did not provide enough evidence suggesting the causal associations of NAFLD with heart failure, coronary artery disease, and any stroke subtypes.
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Affiliation(s)
- Hexiang Peng
- Department of Epidemiology and Biostatistics, School of Public Health, Peking University, Beijing 100191, China
| | - Siyue Wang
- Department of Epidemiology and Biostatistics, School of Public Health, Peking University, Beijing 100191, China
| | - Mengying Wang
- Department of Epidemiology and Biostatistics, School of Public Health, Peking University, Beijing 100191, China
| | - Ying Ye
- Department of Local Diseases Control and Prevention, Fujian Provincial Center for Disease Control and Prevention, Fuzhou 350001, China
| | - Enci Xue
- Department of Epidemiology and Biostatistics, School of Public Health, Peking University, Beijing 100191, China
| | - Xi Chen
- Department of Epidemiology and Biostatistics, School of Public Health, Peking University, Beijing 100191, China
| | - Xueheng Wang
- Department of Epidemiology and Biostatistics, School of Public Health, Peking University, Beijing 100191, China
| | - Meng Fan
- Department of Epidemiology and Biostatistics, School of Public Health, Peking University, Beijing 100191, China
| | - Wenjing Gao
- Department of Epidemiology and Biostatistics, School of Public Health, Peking University, Beijing 100191, China
| | - Xueying Qin
- Department of Epidemiology and Biostatistics, School of Public Health, Peking University, Beijing 100191, China
| | - Yiqun Wu
- Department of Epidemiology and Biostatistics, School of Public Health, Peking University, Beijing 100191, China
| | - Dafang Chen
- Department of Epidemiology and Biostatistics, School of Public Health, Peking University, Beijing 100191, China
| | - Jin Li
- Department of Epidemiology and Biostatistics, School of Public Health, Peking University, Beijing 100191, China
| | - Yonghua Hu
- Department of Epidemiology and Biostatistics, School of Public Health, Peking University, Beijing 100191, China
| | - Li Wang
- Department of Epidemiology and Biostatistics, Institute of Basic Medical Sciences Chinese Academy of Medical Sciences; School of Basic Medicine Peking Union Medical College, 5 Dong Dan San Tiao, Beijing, 100005, China.
| | - Tao Wu
- Department of Epidemiology and Biostatistics, School of Public Health, Peking University, Beijing 100191, China.
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13
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Jin Q, Yang RX, Fan JG. Does non-alcoholic fatty liver disease predispose patients to carotid arteriosclerosis and ischemic stroke? Clin Mol Hepatol 2022; 28:473-477. [PMID: 35730209 PMCID: PMC9293605 DOI: 10.3350/cmh.2022.0155] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/29/2022] [Accepted: 06/20/2022] [Indexed: 11/09/2022] Open
Affiliation(s)
- Qian Jin
- Department of Gastroenterology, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai 200092, China
| | - Rui-Xu Yang
- Department of Gastroenterology, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai 200092, China
| | - Jian-Gao Fan
- Department of Gastroenterology, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai 200092, China.,Shanghai Key Lab of Pediatric Gastroenterology and Nutrition, Shanghai 200092, China
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Parikh NS. Mendelian randomization elucidates links between nonalcoholic fatty liver disease and stroke. Eur J Neurol 2022; 29:1291-1292. [PMID: 35263808 PMCID: PMC10008440 DOI: 10.1111/ene.15313] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Accepted: 03/03/2022] [Indexed: 11/30/2022]
Affiliation(s)
- Neal S Parikh
- Clinical and Translational Neuroscience Unit, Department of Neurology, Feil Family Brain and Mind Research Institute, Weill Cornell Medicine, New York, New York, USA
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