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Chew NW, Chong B, Ng CH, Kong G, Chin YH, Xiao W, Lee M, Dan YY, Muthiah MD, Foo R. The genetic interactions between non-alcoholic fatty liver disease and cardiovascular diseases. Front Genet 2022; 13:971484. [PMID: 36035124 PMCID: PMC9399730 DOI: 10.3389/fgene.2022.971484] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Accepted: 07/19/2022] [Indexed: 12/03/2022] Open
Abstract
The ongoing debate on whether non-alcoholic fatty liver disease (NAFLD) is an active contributor or an innocent bystander in the development of cardiovascular disease (CVD) has sparked interests in understanding the common mediators between the two biologically distinct entities. This comprehensive review identifies and curates genetic studies of NAFLD overlapping with CVD, and describes the colinear as well as opposing correlations between genetic associations for the two diseases. Here, CVD described in relation to NAFLD are coronary artery disease, cardiomyopathy and atrial fibrillation. Unique findings of this review included certain NAFLD susceptibility genes that possessed cardioprotective properties. Moreover, the complex interactions of genetic and environmental risk factors shed light on the disparity in genetic influence on NAFLD and its incident CVD. This serves to unravel NAFLD-mediated pathways in order to reduce CVD events, and helps identify targeted treatment strategies, develop polygenic risk scores to improve risk prediction and personalise disease prevention.
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Affiliation(s)
- Nicholas W.S. Chew
- Department of Cardiology, National University Heart Centre, Singapore, Singapore
- *Correspondence: Nicholas W.S. Chew, ; Roger Foo,
| | - Bryan Chong
- Yong Loo Lin School of Medicine, National University Singapore, Singapore, Singapore
| | - Cheng Han Ng
- Yong Loo Lin School of Medicine, National University Singapore, Singapore, Singapore
| | - Gwyneth Kong
- Yong Loo Lin School of Medicine, National University Singapore, Singapore, Singapore
| | - Yip Han Chin
- Yong Loo Lin School of Medicine, National University Singapore, Singapore, Singapore
| | - Wang Xiao
- Cardiovascular Research Institute, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
- Cardiovascular Disease Translational Research Programme, National University Health Systems, Singapore, Singapore
- Genome Institute of Singapore, Agency of Science Technology and Research, Bipolis way, Singapore
| | - Mick Lee
- Cardiovascular Research Institute, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
- Cardiovascular Disease Translational Research Programme, National University Health Systems, Singapore, Singapore
- Genome Institute of Singapore, Agency of Science Technology and Research, Bipolis way, Singapore
| | - Yock Young Dan
- Yong Loo Lin School of Medicine, National University Singapore, Singapore, Singapore
- Division of Gastroenterology and Hepatology, Department of Medicine, National University Hospital, Singapore, Singapore
- National University Centre for Organ Transplantation, National University Health System, Singapore, Singapore
| | - Mark D. Muthiah
- Yong Loo Lin School of Medicine, National University Singapore, Singapore, Singapore
- Division of Gastroenterology and Hepatology, Department of Medicine, National University Hospital, Singapore, Singapore
- National University Centre for Organ Transplantation, National University Health System, Singapore, Singapore
| | - Roger Foo
- Department of Cardiology, National University Heart Centre, Singapore, Singapore
- Yong Loo Lin School of Medicine, National University Singapore, Singapore, Singapore
- Cardiovascular Research Institute, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
- Cardiovascular Disease Translational Research Programme, National University Health Systems, Singapore, Singapore
- Genome Institute of Singapore, Agency of Science Technology and Research, Bipolis way, Singapore
- *Correspondence: Nicholas W.S. Chew, ; Roger Foo,
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Tang Q, Cen Z, Lu J, Dong J, Qin L, Lu F, Wu W. The abnormal distribution of peripheral B1 cells and transition B cells in patients with idiopathic dilated cardiomyopathy: a pilot study. BMC Cardiovasc Disord 2022; 22:78. [PMID: 35246021 PMCID: PMC8895850 DOI: 10.1186/s12872-022-02461-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2021] [Accepted: 01/13/2022] [Indexed: 11/10/2022] Open
Abstract
Background The aberrant distribution of peripheral B cell subsets is associated with the pathogenesis of a variety of inflammatory and autoimmune diseases. However, the distribution of peripheral B cell subsets in patients with idiopathic dilated cardiomyopathy (DCM) remains to be elucidated.
Methods Twenty-seven patients with idiopathic DCM (DCM group), 18 control patients with heart failure (HF group) and 21 healthy individuals (HC group) were included in this study. Peripheral B cell subsets were analysed using multicolour flow cytometry. The plasma β1 adrenergic receptor (β1-AR) autoantibody titre was determined using ELISA. Additionally, clinical features were also collected. Results Compared with the HF and HC groups, the percentage of B1 cells was significantly decreased, whereas the percentage of transitional B cells (Tr) was significantly increased in the DCM group. Notably, the percentage of B1 cells was significantly lower in patients with β1-AR autoantibody-positive DCM than in β1-AR autoantibody-negative patients. The correlation analysis showed that the percentage of B1 cells was negatively correlated with N-terminal pro-brain natriuretic peptide (NT-proBNP) levels and positively correlated with the left ventricular ejection fraction in patients with DCM. Conclusion As shown in the present study, the percentage of B1 cells in the peripheral blood of patients with idiopathic DCM is abnormally decreased, especially in β1-AR autoantibody-positive patients, while the percentage of Tr cells is significantly increased, indicating that B1 cells and Tr cells may be implicated in the pathogenesis of idiopathic DCM. The decrease in the percentage of B1 cells is directly related to the severity of DCM. Supplementary Information The online version contains supplementary material available at 10.1186/s12872-022-02461-8.
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Affiliation(s)
- Quan Tang
- Department of Cardiology, First Affiliated Hospital of Guangxi Medical University, Guangxi Cardiovascular Institute, Shuangyong Road 6, Nanning, 530021, Guangxi, People's Republic of China
| | - Zhihong Cen
- Department of Cardiology, First Affiliated Hospital of Guangxi Medical University, Guangxi Cardiovascular Institute, Shuangyong Road 6, Nanning, 530021, Guangxi, People's Republic of China
| | - Jing Lu
- Department of Cardiology, First Affiliated Hospital of Guangxi Medical University, Guangxi Cardiovascular Institute, Shuangyong Road 6, Nanning, 530021, Guangxi, People's Republic of China
| | - Jingwei Dong
- Department of Cardiology, First Affiliated Hospital of Guangxi Medical University, Guangxi Cardiovascular Institute, Shuangyong Road 6, Nanning, 530021, Guangxi, People's Republic of China
| | - Lin Qin
- Department of Cardiology, Fifth Affiliated Hospital of Guangxi Medical University, Nanning, 530022, Guangxi, People's Republic of China
| | - Feiyu Lu
- Department of Cardiology, First Affiliated Hospital of Guangxi Medical University, Guangxi Cardiovascular Institute, Shuangyong Road 6, Nanning, 530021, Guangxi, People's Republic of China
| | - Weifeng Wu
- Department of Cardiology, First Affiliated Hospital of Guangxi Medical University, Guangxi Cardiovascular Institute, Shuangyong Road 6, Nanning, 530021, Guangxi, People's Republic of China.
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Chen M, Jiang YF, Yang HJ, Zhang NN, Rui Q, Zhou YF. Tumor Necrosis Factor-α Gene Polymorphism (G-308A) and Dilated Cardiomyopathy. Int Heart J 2019; 60:656-664. [DOI: 10.1536/ihj.17-293] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Affiliation(s)
- Min Chen
- Department of Cardiology, The First Affiliated Hospital of Soochow University
- Department of Cardiology, Wujiang Hospital Affiliated to Nantong University, The First People's Hospital of Wujiang, Medical School of Nantong University
| | - Yu-Feng Jiang
- Department of Cardiology, The First Affiliated Hospital of Soochow University
| | - Hua-Jia Yang
- Department of Cardiology, The First Affiliated Hospital of Soochow University
| | - Nan-Nan Zhang
- Department of Cardiology, The First Affiliated Hospital of Soochow University
| | - Qing Rui
- Department of Cardiology, The First Affiliated Hospital of Soochow University
| | - Ya-Feng Zhou
- Department of Cardiology, The First Affiliated Hospital of Soochow University
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Zhang Y, Cao Y, Xin L, Gao N, Liu B. Association between rs1800629 polymorphism in tumor necrosis factor-α gene and dilated cardiomyopathy susceptibility: Evidence from case-control studies. Medicine (Baltimore) 2018; 97:e13386. [PMID: 30557992 PMCID: PMC6320213 DOI: 10.1097/md.0000000000013386] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
OBJECTIVE Several published studies have investigated the association between the -308G/A (rs1800629) polymorphism in the tumor necrosis factor-α (TNF-α) gene and the risk of dilated cardiomyopathy (DCM). However, the TNF-α gene polymorphism has a controversial role in the pathogenesis of DCM among different populations. In the present study, a meta-analysis was performed to resolve this inconsistency. METHODS Potentially eligible papers reporting an association between the TNF-α rs1800629 polymorphism and DCM susceptibility were searched in 4 databases including PubMed, EMBASE, Chinese Biomedical Database (CBM), and the Cochrane Library up to April 1, 2018. The odds ratio (OR) with its 95% confidence interval (CI) was used to estimate the strength of the associations. Subgroup analysis based on the ethnicity, studies with or without ischemic and valvular DCM was conducted. Publication bias detection was conducted using Begg test. RESULTS Nine papers detailing case-control studies were included, reporting a total of 1339 DCM cases and 1677 healthy controls. The meta-analysis results indicated that TNF-α rs1800629 was associated with increased DCM susceptibility in the populations studied under the heterozygous model (AG vs GG: OR = 1.91, 95% CI = 1.05-3.50, P = .035) and dominant model (AG + AA vs GG: OR = 1.87, 95% CI = 1.01-3.45, P = .046). In the subgroup analysis for ethnicity, rs1800629 polymorphism was significantly associated with the susceptibility of DCM for Asians under the 5 models (A vs G: OR = 2.87, 95% CI = 1.56-5.30, P = .001; AA vs GG: OR = 3.95, 95% CI = 1.13-13.82, P = 0.031; AG vs GG: OR = 3.8, 95% CI = 1.57-9.19, P = .003; AA vs GG + AG: OR = 2.51, 95% CI = 1.41-4.49, P = .002; AG + AA vs GG: OR = 3.77, 95% CI = 1.54-9.20, P = .004). CONCLUSION There may be a moderate association between TNF-α rs1800629 polymorphism and DCM susceptibility in the whole populations studied; however, TNF-α rs1800629 polymorphism was significantly associated with the susceptibility of DCM for Asians, which indicates that such associations may be different between ethnicities.
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Malysheva IE, Topchieva LV, Tikhonovich EL, Barysheva OY. [Analysis of an association of TNF -308G>A polymorphism with a risk for pulmonary sarcoidosis in the Russian population of the Republic of Karelia]. TERAPEVT ARKH 2017; 89:61-64. [PMID: 28378732 DOI: 10.17116/terarkh201789361-64] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
AIM To analyze an association of TNF -308G>A polymorphism with a risk for pulmonary sarcoidosis (PS) in the Russian population of the Republic of Kareli. SUBJECTS AND METHODS 84 patients with persistent PS and 96 donors without clinical manifestations of this disease (a control group) were examined. Polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) analysis was used to identify alleles and genotypes by the marker of TNF -308G>A polymorphism. The level of transcripts of the above gene in the peripheral blood leukocytes of healthy and sick people was determined by real-time PCR. RESULTS There were no significant differences in the distribution of allelic and genotypic frequencies by the marker of TNF -308G>A polymorphism between the control and PS patient groups. There was a significant increase in the number of TNF gene transcripts in the peripheral blood leukocytes of patients with PS compared to the controls. At the same time, there were no marked differences in mRNA expression levels in the above gene in the carriers of different genotypes by the marker of TNF -308G>A polymorphism in all the examined groups. CONCLUSION The marker of TNF -308G>A polymorphism is unassociated with the risk of PS in the Russian population of the Republic of Karelia. No differences in TNF mRNA levels in the carriers of different genotypes by the above marker may suggest that the found elevated level of transcripts in the above gene in patients with diagnosed with PS is due to the development of the body's inflammatory responses in this disease.
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Affiliation(s)
- I E Malysheva
- Institute of Biology, Karelian Research Center, Russian Academy of Sciences, Petrozavodsk, Russia
| | - L V Topchieva
- Institute of Biology, Karelian Research Center, Russian Academy of Sciences, Petrozavodsk, Russia
| | | | - O Yu Barysheva
- Petrozavodsk State University, Ministry of Health of Russia, Petrozavodsk, Russia
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Gombos T, Förhécz Z, Pozsonyi Z, Jánoskuti L, Prohászka Z, Karádi I. Long-Term Survival and Apolipoprotein A1 Level in Chronic Heart Failure: Interaction With Tumor Necrosis Factor α -308 G/A Polymorphism. J Card Fail 2016; 23:113-120. [PMID: 27317841 DOI: 10.1016/j.cardfail.2016.06.004] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2015] [Revised: 06/08/2016] [Accepted: 06/09/2016] [Indexed: 11/17/2022]
Abstract
BACKGROUND Apolipoprotein A1 (ApoA1), a major constituent of high-density lipoprotein (HDL), has antiinflammatory and antioxidative properties and plays a prognostic role in chronic heart failure (CHF). Despite increased tumor necrosis factor α (TNFα) levels being linked to worse outcome of HF, the results are ambiguous about the association of functionally active 308 promoter polymorphism of the TNFα gene. The aims of our study were to investigate the association of ApoA1 and TNFα levels with mortality and to evaluate potential interaction between these factors and TNFα -308 polymorphism. METHODS Together with several parameters ApoA1, TNFα levels and TNFα-308 polymorphism were determined in a cohort of 195 patients with CHF who were followed for 5 years. RESULTS Low ApoA1 and high TNFα levels were associated with more severe disease, and ApoA1 showed the strongest relationship with HDL, total cholesterol, C-reactive protein, and N-terminal pro-B-type natriuretic peptide (NT-proBNP). TNFα -308 A carriers had significantly higher ApoA1 levels than wild-type (GG) patients (1.41 ± 0.268 vs 1.29 ± 0.324 g/L; P = .007), whereas levels of TNFα were the same in these groups. Decreased ApoA1 levels were significant predictors of 5-year mortality (NT-proBNP-adjusted HR for 1 decile decrease in ApoA1 level was 1.10 (P = .011). Interaction was found between the ApoA1 level and TNFα -308 polymorphism, because in patients with GG haplotype the adverse effect of low ApoA1 level on survival was more prevalent. CONCLUSIONS Lower ApoA1 levels were strongly associated with adverse outcome in CHF patients in a TNFα -308 polymorphism dependent manner. These observations support the complex involvement of malnutrition and inflammation in the pathogenesis of CHF.
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Affiliation(s)
- Tímea Gombos
- IIIrd Department of Internal Medicine, Semmelweis University, Budapest, Hungary.
| | - Zsolt Förhécz
- IIIrd Department of Internal Medicine, Semmelweis University, Budapest, Hungary
| | - Zoltán Pozsonyi
- IIIrd Department of Internal Medicine, Semmelweis University, Budapest, Hungary
| | - Lívia Jánoskuti
- IIIrd Department of Internal Medicine, Semmelweis University, Budapest, Hungary
| | - Zoltán Prohászka
- IIIrd Department of Internal Medicine, Semmelweis University, Budapest, Hungary
| | - István Karádi
- IIIrd Department of Internal Medicine, Semmelweis University, Budapest, Hungary
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Mishra B, Sharma M, Sarkar S, Bahl A, Saikia UN, Ratho RK. Tumour necrosis factor-alpha promoter polymorphism and its association with viral dilated cardiomyopathy in Indian population: A pilot study. Indian J Med Microbiol 2015; 33:16-20. [DOI: 10.4103/0255-0857.148370] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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8
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Liaquat A, Asifa GZ, Zeenat A, Javed Q. Polymorphisms of tumor necrosis factor-alpha and interleukin-6 gene and C-reactive protein profiles in patients with idiopathic dilated cardiomyopathy. Ann Saudi Med 2014; 34:407-14. [PMID: 25827698 PMCID: PMC6074564 DOI: 10.5144/0256-4947.2014.407] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
BACKGROUND AND OBJECTIVES The tumor necrosis factor-alpha (TNF-a) and interleukin (IL)-6 gene polymorphism has a controversial role in the pathogenesis of cardiovascular disease among different populations. The effect of the cytokine's gene polymorphism on idiopathic dilated cardiomyopathy (IDCM) is still unresolved. The current study aimed to evaluate the association of the TNF-a -308 G/A and IL-6 -174 G/C polymorphism with IDCM in a Pakistani population. DESIGN AND SETTINGS Blood samples for this case-control study were collected from the cardiology out.patient department of multiple cardiology centers of Rawalpindi/Islamabad, Pakistan, between July 2012 and December 2012. PATIENTS AND METHODS IDCM cases (number [n]=250) and healthy controls (n=300) were genotyped using polymerase chain reaction and restriction fragment length polymorphism. RESULTS The TNF-a -308 variant genotypes GA and AA were more prevalent in patients compared with the control group (P < .0001). Similarly, the IL-6 -174 variant genotypes GC and CC showed a high prevalence in patients with IDCM compared with healthy controls (P=.0019). IDCM cases had a higher prevalence of the TNFa-308A (P < .0001) and the IL-6 -174C (P=.0008) mutant alleles than did the control group. The IDCM cases bearing the TNF-a-308 and IL-6 variant genotypes revealed elevated levels of high-sensitivity C-reactive protein (hs-CRP) when compared with the corresponding controls (P < .05). CONCLUSION The TNF-a -308 G/A and IL-6 -174 G/C gene polymorphisms and high levels of hs-CRP may be associated with the pathogenesis of IDCM in the study population.
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Affiliation(s)
| | | | | | - Qamar Javed
- Dr. Qamar Javed, Department of Biochemistry, Quaid-i-Azam University, Department of Biochemistry, Islamabad, Pakistan 4530, T: (92) 51 9064 3016,
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Nikolic VN, Jevtovic-Stoimenov T, Stokanovic D, Milovanovic M, Velickovic-Radovanovic R, Pesic S, Stoiljkovic M, Pesic G, Ilic S, Deljanin-Ilic M, Marinkovic D, Stefanovic N, Jankovic SM. An inverse correlation between TNF alpha serum levels and heart rate variability in patients with heart failure. J Cardiol 2013; 62:37-43. [PMID: 23611168 DOI: 10.1016/j.jjcc.2013.02.013] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/21/2012] [Revised: 01/25/2013] [Accepted: 02/20/2013] [Indexed: 01/01/2023]
Abstract
BACKGROUND Recent evidence indicates that chronic heart failure (CHF) is accompanied by both activation of the immune system and autonomic imbalance. There is a growing body of evidence that increased levels of proinflammatory cytokines and other inflammatory markers have important roles as mediators of disease progression and markers of mortality in patients with CHF. OBJECTIVE The aim of this study was to investigate connection between autonomic imbalance [obtained by analysis of heart rate variability (HRV)] and activation of the immune system [as measured by serum levels of tumor necrosis factor (TNF)-α] in patients with chronic heart failure. MATERIALS AND METHODS This cross-sectional study included 21 patients with CHF and 8 age- and gender-matched healthy control subjects. We assessed HRV by 24-hour electrocardiographic Holter monitoring and measured serum levels of TNF-α using an enzyme-linked immunosorbent assay. Clinical assessment and echocardiography were also performed. RESULTS There was an inverse correlation between serum level of TNF-α and a time-domain parameter of HRV - SDNN (r=-0.542, p<0.05). A similar result was found for HRV triangular index, a geometric measure of HRV (r=-0.556; p<0.05). The correlation was stronger for subjects with a diabetes mellitus, females, and TNFA2 allele carriers (an "A" at position -308A). The pNN50, indirect marker of cardiac vagal activity, was not significantly associated with serum concentration of TNF-α. CONCLUSIONS In conclusion, the results of the present study indicate that increased serum TNF-α level is significantly associated with reduced HRV indices, suggesting that activation of the immune system in patients with CHF is closely related to autonomic imbalance.
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Affiliation(s)
- Valentina N Nikolic
- Department of Pharmacology, University of Nis Faculty of Medicine, Nis, Serbia.
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Luo R, Li X, Fan X, Yuan W, Wu X. Association of tumor necrosis factor-α gene G-308A polymorphism with dilated cardiomyopathy: a meta-analysis. DNA Cell Biol 2013; 32:130-7. [PMID: 23425028 DOI: 10.1089/dna.2012.1911] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Published data on the association between tumor necrosis factor-α (TNF-α) G-308A gene polymorphism and dilated cardiomyopathy (DCM) risk are inconclusive. To clarify the association of TNF-α G-308A gene polymorphism and DCM, a meta-analysis of case-control studies was performed. Some databases, such as PubMed and Embase, were searched to indentify related studies. Search terms included dilated cardiomyopathy, tumor necrosis factor-alpha or TNF-α or TNF alpha or tumor necrosis factor alpha, and polymorphism or mutation. Eight case-control studies involving 1487 DCM cases and 1734 normal controls were included in the meta-analysis to assess the purported association between the TNF-α G-308A gene polymorphism and the risk of DCM. A dominant genetic model was used and the comparison of GA/AA genotype versus GG genotype was performed in the present meta-analysis. The odds ratio was 1.42 (95% confidence interval: 1.05, 1.93, P=0.02), manifesting frequency of the TNF-α-308 GA/AA genotype was higher in DCM patients than the control group. TNF-α G-308A nucleotide transition might be associated with the risk of DCM.
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Affiliation(s)
- Rong Luo
- The Center for Heart Development, Key Laboratory of MOE for Developmental Biology and Protein Chemistry, College of Life Sciences, Hunan Normal University, Changsha, Hunan, People's Republic of China
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Guo J, He YH, Chen F, Jiang MH, Gao SP, Su YM, Shi GL, Deng XT, Zhu JH, Pan M. The A to G polymorphism at -1082 of the interleukin-10 gene is rare in the Han Chinese population. Mol Med Rep 2012; 6:894-6. [PMID: 22825546 DOI: 10.3892/mmr.2012.995] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2012] [Accepted: 07/13/2012] [Indexed: 11/05/2022] Open
Abstract
Interleukin-10 (IL-10) is a multifunctional anti-inflammatory cytokine involved in various physiological and pathophysiological processes including cardiovascular disease. It has been reported that 50-75% of the variation in IL-10 production is genetically controlled. In the present study, the IL-10 -1082A/G (rs1800896) polymorphism was detected in 174 coronary artery disease (CAD) patients confirmed by selective coronary angiography and 176 age and gender-matched controls from the Jiangsu area (East China). The majority of the subjects (93.14%) carried the AA wild-type genotype, whereas only 0.29% carried the GG genotype. Our results suggest that IL-10 -1082A/G is rare and unlikely to be a significant contributory to disease susceptibility in the Han Chinese population.
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Affiliation(s)
- Jing Guo
- Department of Cardiology, Fourth People's Hospital of Wuxi and Affiliated Hospital of Jiangnan University, Wuxi 216042, PR China
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Kleinbongard P, Schulz R, Heusch G. TNFα in myocardial ischemia/reperfusion, remodeling and heart failure. Heart Fail Rev 2011; 16:49-69. [PMID: 20571888 DOI: 10.1007/s10741-010-9180-8] [Citation(s) in RCA: 174] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
TNFα is crucially involved in the pathogenesis and progression of myocardial ischemia/reperfusion injury and heart failure. The formation and release of TNFα and its downstream signal transduction cascade following activation of its two receptor subtypes are characterized. Myocardial TNFα and TNF receptor activation have an ambivalent role in myocardial ischemia/reperfusion injury and protection from it. Excessive TNFα expression and subsequent cardiomyocyte TNF receptor type 1 stimulation induce contractile dysfunction, hypertrophy, fibrosis and cell death, while a lower TNFα concentration and subsequent cardiomyocyte TNF receptor type 2 stimulation are protective. Apart from its concentration and receptor subtype, the myocardial action of TNFα depends on the duration of its exposure and its localization. While detrimental during sustained ischemia, TNFα contributes to ischemic preconditioning protection, no matter whether it is the first, second or third window of protection, and both TNF receptors are involved in the protective signal transduction cascade. Finally, the available clinical attempts to antagonize TNFα in cardiovascular disease, notably heart failure, are critically discussed.
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Affiliation(s)
- Petra Kleinbongard
- Institut für Pathophysiologie, Universitätsklinikum Essen, Hufelandstrasse 55, 45122, Essen, Germany
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Hamajima N, Hishida A. Genetic traits for the persistence of Helicobacter pylori infection. Per Med 2010; 7:249-262. [PMID: 29776221 DOI: 10.2217/pme.10.14] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Helicobacter pylori infection elevates the risk of gastric diseases, including peptic ulcer and gastric cancer. Persistent infection is the first step to induce H. pylori-induced multistage diseases. Although the roles of genetic traits on persistent infection have not yet been elucidated, some individuals escape from persistent infection. Possible favorable conditions for H. pylori seem to be low acid secretion, reduced innate immune responses, and easier binding to gastric epithelial cells. IL-1β and TNF-α inhibit acid secretion. The genetic polymorphisms associated with both molecules have the potential to be the genetic traits underlying persistent infection. Functional polymorphisms associated with innate immune responses could also be involved with the genetic traits, but no polymorphisms with consistent associations have been identified so far. The polymorphisms associated with molecules for adhesion to epithelial cells are candidates of genetic traits, but more research is needed.
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Affiliation(s)
| | - Asahi Hishida
- Department of Preventive Medicine, Nagoya University Graduate School of Medicine, 65 Tsurumai-cho, Showa-ku, Nagoya, 466-8550, Japan
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Sugimoto M, Furuta T, Shirai N, Nakamura A, Kajimura M, Sugimura H, Hishida A. Effects of interleukin-10 gene polymorphism on the development of gastric cancer and peptic ulcer in Japanese subjects. J Gastroenterol Hepatol 2007; 22:1443-9. [PMID: 17716348 DOI: 10.1111/j.1440-1746.2006.04613.x] [Citation(s) in RCA: 74] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
BACKGROUND Anti-inflammatory cytokines play an important role in downregulation of inflammation and the prevention of neoplastic disorders. Genetic variations of anti-inflammatory cytokines are assumed to influence such responses. The aim of the present study was to clarify the association between the IL-10 polymorphism, one of the representative anti-inflammatory cytokines, and susceptibility to gastric cancer and peptic ulcer in Japan. METHODS The IL-10-1082 (A/G)/-819 (T/C)/-592 (A/C) polymorphisms were assessed in Helicobacter pylori-positive patients with gastritis only (n = 162), gastric ulcers (n = 110), duodenal ulcers (n = 94), or gastric cancers (n = 105), and H. pylori-negative controls (n = 168) by allele specific primer-polymerase chain reaction methods. RESULTS The carriage of IL-10-592 C (age and sex-adjusted odds ratio [OR]: 1.851, 95% confidence interval [CI]: 1.018-3.380) and IL-10-819 C (adjusted OR: 1.868, 95%CI: 1.023-3.411) allele were associated with an increased risk for gastric cancer development, not gastric ulcer and duodenal ulcer. The IL-10-1082 polymorphism had no association with development of gastric cancer and peptic ulcers. The presence of the ATA/GCC haplotype of IL-10-1082/-819/-592 polymorphism significantly increased the risk of gastric cancer development (adjusted OR: 2.805, 95%CI: 1.258-6.254) compared with presence of the ATA/ATA haplotype. CONCLUSIONS The IL-10-1082/-819/-592 genotype status and haplotype were associated with an increased risk for gastric cancer development, not peptic ulcer, in Japan. The genotyping test of this anti-inflammatory cytokine would be useful for the detection of individuals with higher risk of gastric cancer development.
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Affiliation(s)
- Mitsushige Sugimoto
- First Department of Medicine, Hamamatsu University School of Medicine, Shizuoka, Japan.
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15
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Okayama N, Hamanaka Y, Suehiro Y, Hasui Y, Nakamura J, Hinoda Y. Association of interleukin-10 promoter single nucleotide polymorphisms -819 T/C and -592 A/C with aging. J Gerontol A Biol Sci Med Sci 2006; 60:1525-9. [PMID: 16424284 DOI: 10.1093/gerona/60.12.1525] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Increased inflammatory activity is known to accompany aging. Single nucleotide polymorphisms of inflammatory mediator genes might therefore affect the aging process. Relation of eight SNPs (tumor necrosis factor-alpha [TNF-alpha] -1031 T/C, interleukin-10 [IL-10] -819 T/C, IL-1beta -511 C/T, IL-6 -634 C/G, IL-18 -607 A/C, transforming growth factor-beta [TGF-beta] +869 C/T, matrix metalloproteinase-1 [MMP-1] -1607 1G/2G, and MMP-3 -1171 5A/6A) with age or gender was evaluated in 500 Japanese persons (mean age: 56.7 years old, range: 19-100) by the chi-square test. There was a significant association of IL-10 -819 T/C with age (p =.0026). The association remained significant after multivariate logistic regression analysis (odds ratio for an age interval for 1 year, 1.009; 95% CI, 1.002-1.016). Furthermore, the genotype distribution of IL-10 -819 T/C was completely consistent with that of -592 A/C. These data suggest that IL-10 -819 T/C and -592 A/C may be a promising candidate for an aging-related gene in a Japanese population.
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Affiliation(s)
- Naoko Okayama
- Department of Clinical Laboratory Science, Yamaguchi University School of Medicine, Ube, Yamaguchi 755-8505, Japan
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16
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Vadlamani L, Iyengar S. Tumor necrosis factor alpha polymorphism in heart failure/cardiomyopathy. ACTA ACUST UNITED AC 2005; 10:289-92. [PMID: 15591843 DOI: 10.1111/j.1527-5299.2004.02020.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Tumor necrosis factor a (TNF-alpha) is a proinflammatory cytokine that is produced by activated macrophages. It has been shown to stimulate the release of endothelial cytokines and NO, increase vascular permeability, decrease contractility, and induce a prothrombotic state. The most studied TNF-a gene mutation in heart disease is a gamma to alpha substitution, which occurs when 308 nucleotides move upstream from the transcription initiation site in the TNF promoter and has been associated with elevated levels of TNF-alpha. The TNF1 allele (wild type) contains gamma at this site, while the TNF2 allele has an alpha substitution at the site. The TNF2 allele is a more powerful transcriptional activator, therefore leading to higher TNF-alpha levels. Most of the studies to date have failed to conclusively show any link between the polymorphism and heart disease, both coronary artery disease and cardiomyopathy/heart failure.
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Affiliation(s)
- Lou Vadlamani
- Department of Cardiovascular Medicine, Ohio State University, Suite 200, Davis Heart and Lung Research Institute, 473 West 12th Avenue, Columbus, OH 43210-1252, USA.
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17
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Bleumink GS, Schut AFC, Sturkenboom MCJM, Deckers JW, van Duijn CM, Stricker BHC. Genetic polymorphisms and heart failure. Genet Med 2005; 6:465-74. [PMID: 15545741 DOI: 10.1097/01.gim.0000144061.70494.95] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Heart failure is a complex clinical syndrome. There is evidence for a genetic contribution to the pathophysiology of heart failure. Considering the fundamental role of neurohormonal factors in the pathophysiology and progression of cardiac dysfunction and hypertrophy, variants of genes involved in this system are logical candidate genes in heart failure. In this report, genetic polymorphisms of the major neurohormonal systems in heart failure will be discussed. Studies on polymorphisms of the renin-angiotensin-aldosterone system (RAAS), adrenergic receptor polymorphisms, endothelin (receptor) polymorphisms, and a group of miscellaneous polymorphisms that may be involved in the development or phenotypic expression of heart failure will be reviewed. Research on left ventricular hypertrophy is also included. The majority of genetic association studies focused on the ACE I/D polymorphism. Initial genetic associations have often been difficult to replicate, mainly due to problems in study design and lack of power. Promising results have been obtained with genetic polymorphisms of the RAAS and sympathetic system. Considering the evidence so far, a modifying role for these polymorphisms seems more likely than a role of these variants as susceptibility genes. Besides the need for larger studies to examine the effects of single nucleotide polymorphisms and haplotypes, future studies also need to focus on the complexity of these systems and study gene-gene interactions and gene-environment interactions.
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Affiliation(s)
- Gysèle S Bleumink
- Department of Epidemiology and Biostatistics, Erasmus Medical Center, Rotterdam, The Netherlands
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18
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Bayley JP, Ottenhoff THM, Verweij CL. Is there a future for TNF promoter polymorphisms? Genes Immun 2005; 5:315-29. [PMID: 14973548 DOI: 10.1038/sj.gene.6364055] [Citation(s) in RCA: 189] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The in vitro study of TNF promoter polymorphism (SNP) function was stimulated by the numerous case-control (association) studies of the polymorphisms in relation to human disease and the appearance of several studies claiming to show a functional role for these SNPs provided a further impetus to researchers interested in the role of TNF in their disease of interest. In this review we consider case-control studies, concentrating on the autoimmune and inflammatory diseases rheumatoid arthritis, multiple sclerosis, ankylosing spondylitis, and asthma, and on infectious diseases including malaria, hepatitis B and C infection, leprosy and sepsis/septic shock. We also review the available evidence on the functional role of the various TNF promoter polymorphisms. In general, case-control studies have produced mixed results, with little consensus in most cases on whether any TNF polymorphisms are actually associated with disease, although results have been more consistent in the case of infectious diseases, particularly malaria. Functional studies have also produced mixed results but recent work suggests that the much studied -308G/A polymorphism is not functional, while the function of other TNF polymorphisms remains controversial. Studies of the TNF region are increasingly using extended haplotypes that can better capture the variation of the MHC region.
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Affiliation(s)
- J-P Bayley
- Department of Human Genetics, Leiden University Medical Center, Leiden, The Netherlands.
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19
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Abstract
This review describes the numerous and complex molecular systems that are either known players or candidates in heart failure(HF). All systems whose genetic background has been investigated to date in HF are listed and discussed. Discussion also includes functional notes and known genetic polymorphisms already investigated in HF or candidates that have not yet been investigated. Despite substantial research on HF, relatively few coordinated studies have been conducted that assign precise risk to specific genetic polymorphisms. Identification of risk associated with genetic variations and subsequent translation of genetic knowledge into clinical practice will likely progress only in cases of large coordinated studies based on identical standards. The potential result will be a more accurate definition of HF identified as an evolving complex of cardiovascular diseases.
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20
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Hamajima N, Katsuda N, Matsuo K, Saito T, Hirose K, Inoue M, Zaki TT, Tajima K, Tominaga S. High anti-Helicobacter pylori antibody seropositivity associated with the combination of IL-8-251TT and IL-10-819TT genotypes. Helicobacter 2003; 8:105-10. [PMID: 12662377 DOI: 10.1046/j.1523-5378.2003.00130.x] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/09/2022]
Abstract
BACKGROUND Helicobacter pylori induces inflammation of gastric mucosa regulated by several interleukins. This study examined associations between anti-Helicobacter pylori immunoglobulin G antibody seropositivity and functional polymorphisms of interleukin-8 T-251 A and interleukin-10 T-819C. MATERIALS AND METHODS The subjects were 454 health check-up examinees (126 males and 328 females) without a history of cancer, aged 35-85 years, residing in Nagoya, Japan. After written informed consent was obtained individually, residual blood was anonymously applied for anti-Helicobacter pylori immunoglobulin G antibody testing and genotyping by the polymerase chain reaction with confronting two-pair primers. RESULTS The genotype frequency of interleukin-8 T-251 A was 52.2% for TT, 39.5% for TA, and 8.3% for AA, and that of interleukin-10 T-819C was 49.5% for TT, 39.9% for TC and 10.6% for CC. Although the differences in the positive rates among the genotypes were not marked, 115 individuals with interleukin-8-251TT (low expression genotype) and interleukin-10-819TT (high expression genotype) had a higher rate (63.5%) than the others (52.0%). Relative to the combination of interleukin-8-251TT and interleukin-10-819TT, the sex-age-adjusted odds ratio for those with the other combinations was 0.62 (95% confidence interval, 0.39-0.98). The adjusted odds ratio among 65 current smokers was 0.13 (0.03-0.61). CONCLUSIONS The observed association suggests that individuals with interleukin-8-251TT and interleukin-10-819TT, a combination presumably causing mild inflammation, have a higher probability of the continuing Helicobacter pylori infection, especially among current smokers.
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Affiliation(s)
- Nobuyuki Hamajima
- Division of Epidemiology and Prevention, Aichi Cancer Center Research Center, Nagoya, Japan
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21
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Alikasifoglu M, Tokgözoglu L, Acil T, Atalar E, Ali Oto M, Sirri Kes S, Tuncbilek E. Tumor necrosis factor-alpha polymorphism in Turkish patients with dilated cardiomyopathy. Eur J Heart Fail 2003; 5:161-3. [PMID: 12644006 DOI: 10.1016/s1388-9842(02)00238-6] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Affiliation(s)
- Mehmet Alikasifoglu
- Faculty of Medicine, Department of Pediatrics, Division of Genetic Diseases, Hacettepe University, Ankara, Turkey.
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22
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Miyazoe S, Hamasaki K, Nakata K, Kajiya Y, Kitajima K, Nakao K, Daikoku M, Yatsuhashi H, Koga M, Yano M, Eguchi K. Influence of interleukin-10 gene promoter polymorphisms on disease progression in patients chronically infected with hepatitis B virus. Am J Gastroenterol 2002; 97:2086-92. [PMID: 12190181 DOI: 10.1111/j.1572-0241.2002.05926.x] [Citation(s) in RCA: 126] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
OBJECTIVES The role of host genetic factors in chronic hepatitis B virus (HBV) infection is not fully understood. We studied the influence of tumor necrosis factor-alpha (TNF-alpha) and interleukin-10 (IL-10) gene promoter polymorphisms on disease progression in HBV carriers. METHODS The sample population included 213 Japanese HBV carriers and 52 healthy volunteers. Of 213 HBV carriers, 66 were considered to be asymptomatic carriers based on the sustained normalization of serum ALT together with seropositivity for the antibody to hepatitis B e antigen (anti-HBe), and 147 were found to have chronic progressive liver disease including cirrhosis. Five biallelic polymorphisms in the TNF-alpha gene promoter and three biallelic polymorphisms in the IL-10 gene promoter were analyzed by polymerase chain reaction in combination with direct sequencing or restriction fragment length polymorphism assay. RESULTS Allelic distributions of both gene promoters were not significantly different between HBV carriers and healthy volunteers. In HBV carriers, the TNF-alpha gene promoter polymorphisms were not linked to disease progression. In contrast, allelic frequencies of T and A at positions -819 and -592, respectively, in the IL-10 gene promoter, as well as the frequencies of ATA haplotype at positions -1082/-819/-592 (which is characterized with low capacity for IL-10 production), were significantly higher in asymptomatic carriers than in patients with chronic progressive liver disease. Even after adjusting for individuals positive for anti-HBe, such a relationship could be found between the two groups. CONCLUSION In chronic HBV infection, inheritance of the IL-10 gene promoter polymorphisms is involved in a host genetic factor that is relevant to disease progression.
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Affiliation(s)
- Seiji Miyazoe
- First Department of Internal Medicine, Nagasaki University School of Medicine, Japan
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23
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Hsieh Y, Chang C, Tsai F, Hsu Y, Tsai H, Tsai C. Polymorphisms for interleukin-4 (IL-4) -590 promoter, IL-4 intron3, and tumor necrosis factor alpha -308 promoter: non-association with endometriosis. J Clin Lab Anal 2002; 16:121-6. [PMID: 11968047 PMCID: PMC6807841 DOI: 10.1002/jcla.10021] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Interleukin-4 (IL-4) is a cytokine with anti-inflammatory properties. Tumor necrosis factor alpha (TNF-alpha), a pluripotent proinflammatory cytokine, plays an important role in the process of numerous inflammatory and autoimmune diseases. We aimed to investigate whether gene polymorphisms for the IL-4 -590 promoter, IL-4 intron3 and TNFalpha -308 promoter could be used as markers of susceptibility in endometriosis. The subjects, 226 premenopausal Taiwan Chinese women with surgically diagnosed endometriosis and nonendometriosis, were divided into two groups: 1) endometriosis (n = 120) and 2) nonendometriosis (n = 106). Polymorphisms for the IL-4 -590 promoter, IL-4 intron3, and TNFalpha -308 G-to-A promoter were detected by polymerase chain reaction (PCR). Genotypes and allelic frequencies for these gene polymorphisms in both groups were compared. We observed no significant differences in genotype distribution and allele frequency of the IL-4 -590 promoter, IL-4 intron3, and TNFalpha gene polymorphism between both groups. The proportions of the -590*C homozygote/heterozygote/-590* T homozygote for the IL-4 promoter in both groups were 1.6/31.6/66.6% in group 1, and 5.8/33.0/61.2% in group 2. The proportions of the RP1 homozygote/heterozygote/RP2 homozygote for IL-4 intron3 in both groups were 62.5/34.1/2.5% (group 1), and 64.1/32.0/3.9% (group 2). The proportions of -308*A homozygote/heterozygote/-308*G homozygote for the TNFalpha promoter in both groups were 7.5/20.8/71.7% (group 1), and 7.5/17/75.5% (group 2). We concluded that there is no association between endometriosis and the IL-4 and TNFalpha gene polymorphisms. The IL-4 -590 promoter, IL-4 intron3, and TNFalpha -308 G-to-A polymorphisms are not useful markers for predicting susceptibility to endometriosis.
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Affiliation(s)
- Yao‐Yuan Hsieh
- Department of Obstetrics and Gynecology, China Medical College Hospital, Taichung, Taiwan
| | - Chi‐Chen Chang
- Department of Obstetrics and Gynecology, China Medical College Hospital, Taichung, Taiwan
| | - Fuu‐Jen Tsai
- Department of Pediatrics and Medical Genetics, China Medical College Hospital, Taichung, Taiwan
| | - Yuan Hsu
- Department of Pediatrics and Medical Genetics, China Medical College Hospital, Taichung, Taiwan
| | - Horng‐Der Tsai
- Department of Obstetrics and Gynecology, China Medical College Hospital, Taichung, Taiwan
| | - Chang‐Hai Tsai
- Department of Pediatrics and Medical Genetics, China Medical College Hospital, Taichung, Taiwan
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Sack M. Tumor necrosis factor-alpha in cardiovascular biology and the potential role for anti-tumor necrosis factor-alpha therapy in heart disease. Pharmacol Ther 2002; 94:123-35. [PMID: 12191598 DOI: 10.1016/s0163-7258(02)00176-6] [Citation(s) in RCA: 100] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
The functional role of tumor necrosis factor (TNF)-alpha in the heart has been extensively studied over the last 15 years. Collectively, these studies have demonstrated that TNF-alpha has both diverse and potentially conflicting roles in cardiac function and pathology. These include beneficial effects, such as cardioprotection against ischemia, myocarditis, and pressure overload, as well as potentially adverse effects, such as the development of atherosclerosis, reperfusion injury, hypertrophy, and heart failure. TNF-alpha antagonist therapy recently has been demonstrated to be clinically applicable in inflammatory conditions, and clinical trials are currently in progress in the use of these agents in cardiovascular diseases. The scope for clinical applications of anti-TNF-alpha therapy in cardiovascular diseases is potentially extensive. Hence, this review has been undertaken to evaluate the cardiovascular effects of this pleiotropic cytokine and to evaluate the potential of targeting this cytokine in cardiovascular therapeutics. An overview of the TNF-alpha peptide and its associated signaling are described. This is followed by a discussion of the known roles of TNF-alpha in cardiac physiology and in a diverse array of cardiac pathologies. Reference to experimental and clinical studies using anti-TNF-alpha therapies are described where applicable. The postulated role of TNF-alpha signaling concerning innate cardiac cellular processes that may have direct adaptive effects in the heart will be reviewed with respect to future research directions. Finally, the author postulates that attenuation of TNF-alpha biosynthesis in selected individuals will need to be tested if true benefits of this therapeutic approach are to be realized in the management of cardiovascular diseases.
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Affiliation(s)
- Michael Sack
- Hatter Institute for Cardiology Research and MRC Inter-University Cape Heart Group, University of Cape Town Medical School, Observatory, 7925, South Africa.
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25
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Densem CG, Hutchinson IV, Yonan N, Brooks NH. Tumour necrosis factor alpha gene polymorphism: a predisposing factor to non-ischaemic myocardial dysfunction? Heart 2002; 87:153-5. [PMID: 11796554 PMCID: PMC1767008 DOI: 10.1136/heart.87.2.153] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Abstract
BACKGROUND Tumour necrosis factor alpha (TNF alpha) is implicated in the pathophysiology of heart failure. Plasma TNF alpha is raised in patients with myocardial dysfunction in proportion to the symptoms. OBJECTIVE To determine whether this genetic variant is over represented in heart transplant recipients. PATIENTS 175 heart transplant recipients and a control group of 212 healthy volunteers were studied. The reason for transplantation was severe symptomatic myocardial dysfunction in all cases. METHODS The TNF alpha genotype was determined by polymerase chain reaction and gel electrophoresis. The populations were compared for their fit to Hardy-Weinberg equilibrium by calculating the expected frequencies of each genotype and comparing them to the observed values. A chi(2) test was used to determine the significance of the difference between the observed and expected values. RESULTS No differences were found in the frequency of the TNF2 allele between all heart transplant recipients taken together (54/175, 31%) and healthy volunteers (58/212, 27%). A higher proportion of TNF2 allele carriers was present in cardiac recipients with a pretransplant diagnosis of viral mediated or idiopathic heart failure than in those with ischaemic myocardial dysfunction (26/69 (37.7%) v 28/106 (26.4%), p = 0.03). PATIENTS with a non-ischaemic aetiology had a higher prevalence of TNF2 than healthy volunteers (26/69 (37.7%) v 58/212 (27%), p = 0.05). CONCLUSIONS The TNF2 allele is overrepresented in patients with end stage non-ischaemic myocardial dysfunction. This may represent a genetic predisposition in a small subset of patients who could respond favourably to anti-TNF alpha treatment.
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Affiliation(s)
- C G Densem
- Cardiothoracic Transplant Unit, Wythenshawe Hospital, Manchester, UK School of Biological Sciences, Manchester University, UK
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26
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Densem CG, Hutchinson IV, Yonan N, Brooks NH. Influence of tumor necrosis factor-alpha gene-308 polymorphism on the development of coronary vasculopathy after cardiac transplantation. J Heart Lung Transplant 2001; 20:1265-73. [PMID: 11744409 DOI: 10.1016/s1053-2498(01)00358-8] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND Tumor necrosis factor-alpha (TNF-alpha) has been implicated in cardiovascular disease. Polymorphism of the TNF-alpha gene promoter region (position -308) influences an individual's production of TNF-alpha. This affects susceptibility to acute rejection after cardiac transplantation. Because the highest serum levels of TNF-alpha have been found in recipients with cardiac transplant vasculopathy and because TNF-alpha blockade can prevent the disease in rabbits, we investigated the effect of TNF-alpha promoter polymorphism on the development of vasculopathy in human cardiac allograft recipients. METHODS Using sequence-specific primers to the TNF-alpha gene and polymerase chain reaction, the genotypes of 147 cardiac transplant recipients and 134 heart donors were identified. An association was sought between the presence of high-producing (A homozygotes, GA heterozygotes) or low-producing (G homozygotes) TNF-alpha genotype and the development of coronary vasculopathy, diagnosed by routine surveillance coronary angiography. RESULTS We found that 31.9% of recipients and 27.0% of donors were high TNF-alpha producers. The presence of the high-producing TNF-alpha allele led to an earlier diagnosis of vasculopathy; 3.42 years (+/- 91.3 days) vs 3.84 years (+/- 76.3 days) for high- and low-producing cardiac graft recipients, respectively; 3.52 years (+/- 87.3 days) vs 3.78 years (+/- 77.4 days) for high- and low-producing donor grafts, respectively. However, neither of these differences were significant. By Kaplan Meier actuarial analysis and log-rank test, TNF-alpha polymorphism had no effect on the freedom from vasculopathy when considering either recipient (p = 0.99) or donor (p = 0.86) TNF-alpha genotype. Multivariate analysis identified increasing donor age and the number of acute rejection episodes of International Society for Heart and Lung Transplantation grade 3 or greater as independent risk factors for vasculopathy in both the recipient and donor cohorts. CONCLUSIONS Polymorphism at position -308 in the promoter region of the TNF-alpha gene fails to predict the development of cardiac transplant-related vasculopathy and cannot be used as a genetic risk marker. This may be because of the effects of immunosuppressive treatment.
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Affiliation(s)
- C G Densem
- Cardiothoracic Transplant Unit, Wythenshawe Hospital, United Kingdom, Manchester, UK
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