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Ma H, Sun G, Wang W, Zhou Y, Liu D, Tong Y, Lu Z. Association Between Interleukin-6 -572 C>G and -174 G>C Polymorphisms and Hypertension: A Meta-analysis of Case-control Studies. Medicine (Baltimore) 2016; 95:e2416. [PMID: 26765421 PMCID: PMC4718247 DOI: 10.1097/md.0000000000002416] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Whether hypertension is associated with -572 C>G or -174 G>C polymorphism in interleukin (IL)-6 genes still remains hazy and ambiguous.We conducted a meta-analysis to offer a more reliable and clearer evaluation about the association.Electronic literature databases including PubMed, Web of Science, EMBASE, Google Scholar, Chinese National Knowledge Infrastructure and Wanfang database were searched.The study included the following: evaluating associations between -572 C>G or -174 G>C polymorphism in IL-6 gene and hypertension; case-control design; essential information must be offered; precise diagnostic criteria of hypertension; and no language restriction.Patients who met the diagnostic criteria and controls without a history of hypertension were included. Interventions were not available.A quality assessment was conducted using Newcastle-Ottawa scale. Combined odds ratios with 95% confidence intervals were calculated in 5 genetic models. Sources of heterogeneity were explored by subgroup analysis, meta-regression, and Galbraith plots. Finally, test for publication bias was performed to prove the stabilization.Fifteen studies were finally included. Eleven articles were judged high-quality reports. Overall, the -572 C>G polymorphism was proved to be significantly associated with hypertension in 4 genetic models. Subgroup analysis based on ethnicity revealed significant associations in Asian population in recessive model and homozygote comparison. The association in Europeans and Mid-East required further confirmation. No significant association was observed between the -174 G>C polymorphism and hypertension under all of the genetic models.The limitations of the study were the following: restrictive number of eligible studies limited the extrapolation range in subgroup analysis; gene-environment factors could not be described due to lack of data; some relevant studies could not be included because of various reasons.Current researches supported the association between the development of hypertension and the -572 C>G rather than -174 G>C polymorphism. Future well designed epidemiological studies may evaluate the possible gene-environment interactions.
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Affiliation(s)
- He Ma
- From the Department of Public Health, Xuzhou Medical College, Xuzhou, Jiangsu, China (HM, GS, WW, YT, ZL); and Department of General Practice, Xuzhou Medical College, Xuzhou, Jiangsu, China (YZ, DL)
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Suma S, Naito M, Wakai K, Sasakabe T, Hattori Y, Okada R, Kawai S, Hishida A, Morita E, Nakagawa H, Tamura T, Hamajima N. Effects ofIL6C-634G polymorphism on tooth loss and their interaction with smoking habits. Oral Dis 2015; 21:807-13. [DOI: 10.1111/odi.12352] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2015] [Revised: 04/30/2015] [Accepted: 05/13/2015] [Indexed: 11/28/2022]
Affiliation(s)
- S Suma
- Department of Preventive Medicine; Nagoya University Graduate School of Medicine; Nagoya Japan
| | - M Naito
- Department of Preventive Medicine; Nagoya University Graduate School of Medicine; Nagoya Japan
| | - K Wakai
- Department of Preventive Medicine; Nagoya University Graduate School of Medicine; Nagoya Japan
| | - T Sasakabe
- Department of Preventive Medicine; Nagoya University Graduate School of Medicine; Nagoya Japan
| | - Y Hattori
- Department of Preventive Medicine; Nagoya University Graduate School of Medicine; Nagoya Japan
| | - R Okada
- Department of Preventive Medicine; Nagoya University Graduate School of Medicine; Nagoya Japan
| | - S Kawai
- Department of Preventive Medicine; Nagoya University Graduate School of Medicine; Nagoya Japan
| | - A Hishida
- Department of Preventive Medicine; Nagoya University Graduate School of Medicine; Nagoya Japan
| | - E Morita
- Department of Preventive Medicine; Nagoya University Graduate School of Medicine; Nagoya Japan
| | - H Nakagawa
- Department of Preventive Medicine; Nagoya University Graduate School of Medicine; Nagoya Japan
- Division of Epidemiology & Prevention; Aichi Cancer Center Research Institute; Nagoya Japan
| | - T Tamura
- Department of Preventive Medicine; Nagoya University Graduate School of Medicine; Nagoya Japan
- Department of Epidemiology and Preventive Medicine; Gifu University Graduate School of Medicine; Gifu Japan
| | - N Hamajima
- Department of Healthcare Administration; Nagoya University Graduate School of Medicine; Nagoya Japan
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Interactions of genetic and non-genetic factors on plasma hs-CRP concentration in a Korean community-based cohort study. Genes Genomics 2015. [DOI: 10.1007/s13258-014-0240-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Sugimoto Y, Wakai K, Nakagawa H, Suma S, Sasakabe T, Sakamoto T, Takashima N, Suzuki S, Ogawa S, Ohnaka K, Kuriyama N, Arisawa K, Mikami H, Kubo M, Hosono S, Hamajima N, Tanaka H. Associations between polymorphisms of interleukin-6 and related cytokine genes and serum liver damage markers: a cross-sectional study in the Japan Multi-Institutional Collaborative Cohort (J-MICC) Study. Gene 2014; 557:158-62. [PMID: 25523094 DOI: 10.1016/j.gene.2014.12.025] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2014] [Revised: 11/27/2014] [Accepted: 12/12/2014] [Indexed: 01/20/2023]
Abstract
Cytokines, including interleukin-6 (IL-6), play an important role in the liver. The aim of this study was to investigate associations between common polymorphisms in potential functional promoters of cytokine genes and liver damage markers among enrollees of a large Japanese cohort study. Subjects included 3257 Japanese individuals (1608 men and 1649 women, aged 35-69 years). Six single nucleotide polymorphisms (SNPs) in the promoter regions of five cytokine genes, IL1B (T-31C), IL6 (C-634G), IL8 (T-251A), IL10 (T-819C), tumor necrosis factor-A (TNFA) (T-1031C), and TNFA (C-857T), were genotyped by polymerase chain reaction. Information regarding alcohol intake, smoking habits, height, and weight was collected by a self-administered questionnaire. Serum aspartate aminotransferase (AST) and alanine aminotransferase (ALT) were measured during a routine health check-up. Of the six SNPs genotyped, an IL6 polymorphism (rs1800796, C-634G) was most strongly associated with a liver damage marker, AST. Mean serum AST was significantly different among the three genotypes (mean ± SD, 22.7 ± 7.3 IU/L for CC, 22.8 ± 7.7 IU/L for CG, and 24.3 ± 8.6 IU/L for GG, p=0.011 by analysis of variance). The differences remained significant after adjustment for potential confounders by general linear models. The variations in mean serum AST and ALT levels were marked especially among men. Thus, the functional polymorphism IL6 C-634G may affect serum AST and ALT levels, possibly through different IL-6 production.
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Affiliation(s)
- Yuka Sugimoto
- Department of Preventive Medicine, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Kenji Wakai
- Department of Preventive Medicine, Nagoya University Graduate School of Medicine, Nagoya, Japan.
| | - Hiroko Nakagawa
- Department of Preventive Medicine, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Shino Suma
- Department of Preventive Medicine, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Tae Sasakabe
- Department of Preventive Medicine, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Tatsuhiko Sakamoto
- Chikushi Office for Health, Human Services and Environmental Issues, Fukuoka Prefectural Government, Onojo, Japan
| | - Naoyuki Takashima
- Department of Health Science, Shiga University of Medical Science, Ohtsu, Japan
| | - Sadao Suzuki
- Department of Public Health, Nagoya City University Graduate School of Medical Sciences, Nagoya, Japan
| | - Shin Ogawa
- Department of International Island and Community Medicine, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, Japan
| | - Keizo Ohnaka
- Department of Geriatric Medicine, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Nagato Kuriyama
- Department of Epidemiology for Community Health and Medicine, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Kokichi Arisawa
- Department of Preventive Medicine, Institute of Health Biosciences, The University of Tokushima Graduate School, Tokushima, Japan
| | - Haruo Mikami
- Division of Cancer Registry, Prevention and Epidemiology, Chiba Cancer Center, Chiba, Japan
| | - Michiaki Kubo
- Core for Genomic Medicine, Center for Integrative Medical Sciences, RIKEN, Yokohama, Japan
| | - Satoyo Hosono
- Division of Epidemiology and Prevention, Aichi Cancer Center Research Institute, Nagoya, Japan
| | - Nobuyuki Hamajima
- Department of Healthcare Administration, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Hideo Tanaka
- Division of Epidemiology and Prevention, Aichi Cancer Center Research Institute, Nagoya, Japan
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Wong HK, Ong KL, Leung RYH, Lam TH, Thomas GN, Lam KSL, Cheung BMY. A single nucleotide polymorphism of interleukin-6 gene is related to plasma adrenomedullin levels. Clin Endocrinol (Oxf) 2013; 79:504-9. [PMID: 23088295 DOI: 10.1111/cen.12078] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/06/2012] [Revised: 08/23/2012] [Accepted: 10/15/2012] [Indexed: 12/13/2022]
Abstract
OBJECTIVE Elevated plasma adrenomedullin (ADM) levels are associated with cardiovascular diseases. Single nucleotide polymorphisms (SNPs) in the gene encoding ADM (ADM) are associated with plasma ADM levels. The presence of a nuclear factor for interleukin-6 (IL-6) expression binding site in the promoter region of the ADM gene suggests a possible relationship between the expression of the ADM and IL-6. Therefore, we investigated whether plasma ADM levels are related to SNPs in the gene encoding IL-6 (IL6). METHODS Plasma ADM levels were measured in 476 subjects in the Hong Kong Cardiovascular Risk Factor Prevalence Study-2 (CRISPS2). The subjects were genotyped for three tagging SNPs in the IL6 gene. RESULTS The minor allele frequencies of the IL6 SNPs rs17147230, rs1800796 and rs2069837 were 41·8%, 20·0% and 15·4%, respectively. The tagging SNP, rs17147230, was associated with plasma ADM levels after adjusting for age and sex (β=-0·096, P = 0·034). The association was significant in women (β=-0·115, P = 0·021) but not in men. Among all subjects, plasma ADM levels decreased with an increasing number of minor alleles of rs17147230 in multivariate analysis (P = 0·034). Compared to subjects with the AA genotype, subjects with the TT genotype had plasma ADM levels 12·8% lower (95% CI: 0·6-23·5%, P = 0·041). Haplotype analysis demonstrated a significant association of the haplotype ACA with plasma ADM levels in women (P < 0·05). CONCLUSION Plasma ADM levels are related to the SNP rs17147230 in IL6 gene. The effect of the polymorphism on inflammation and cardiovascular disease remains to be determined.
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Affiliation(s)
- Hoi Kin Wong
- Department of Medicine, University of Hong Kong, Queen Mary Hospital, 102 Pokfulam Road, Hong Kong
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Hong EP, Kim DH, Suh JG, Park JW. Analyses of longitudinal effects of gene-environment interactions on plasma C-reactive protein levels: the Hallym Aging Study. Genes Genomics 2013. [DOI: 10.1007/s13258-013-0093-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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Li J, Song J, Jiang MH, Zheng JG, Gao SP, Zhu JH, Pan M. Interleukin-6 promoter polymorphisms and susceptibility to atrial fibrillation in elderly Han Chinese patients with essential hypertension. J Interferon Cytokine Res 2012; 32:542-7. [PMID: 22924939 DOI: 10.1089/jir.2012.0033] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
There is an accumulating body of evidence indicating a strong association between inflammation and the pathogenesis of atrial fibrillation (AF). Interleukin-6 (IL-6) is a pleiotropic cytokine, functions as a mediator of inflammatory response, and has both proinflammatory and anti-inflammatory properties. The aim of the present study was to investigate the association of the -634C/G polymorphism of the IL-6 gene with AF in elderly Han Chinese patients with essential hypertension (EH). A total of 169 elderly patients with EH were eligible for this study. Patients with AF (n=75) were allocated to the AF group, and 94 subjects without AF to the control group. The polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) technique was used to assess the genotype frequencies. The distribution of the IL-6 -634C/G genotypes (CC, CG, and GG) was 67.02%, 30.85%, and 2.13% in the controls, and 50.67%, 40.00%, and 9.33% in AF subjects, respectively (P=0.0312). The frequency of the G allele in the AF group was significantly higher than that in the control group (29.33% vs. 17.55%, P=0.0103). Compared with the CC and CG genotypes, the GG homozygote had a 4.7353-fold increased risk of AF [95% confidence interval (CI)=0.9537-23.5116, P=0.0382]. These findings suggest that the IL-6 -634C/G polymorphism is associated with AF, and the G allele has increased risk of AF in elderly Han Chinese patients with EH.
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Affiliation(s)
- Jing Li
- Department of Geraeology, Affiliated Hospital of Nantong University, PR China
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Deng XT, Jiang MH, Zhu JH, Ge LJ, Guo J, Gao SP, Zheng JG, Luan H, Shi GL, Wang RX, Shi HF, Pan M. The Association of Interleukin 6−634C/G Polymorphism With Left Atrial Thrombus and Severe Spontaneous Echocontrast in Patients With Atrial Fibrillation. Clin Appl Thromb Hemost 2012; 19:673-8. [PMID: 22914813 DOI: 10.1177/1076029612457706] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Atrial fibrillation (AF) not only is an independent risk factor for death but also confers significant risk of morbidity from stroke associated with left atrial thrombus. The association of interleukin 6 ( IL-6) polymorphism with thrombus in AF has not been investigated before. We carried out a case–control study in Han Chinese. The IL-6 −634C/G genotypes of 31 patients with thrombus and 45 patients without thrombus were detected by polymerase chain reaction and restriction fragment length polymorphism. The frequencies of the IL-6 genotypes (CC, CG, and GG) were 29.03%, 54.54%, and 16.13% for the patients with thrombus, and 55.56%, 40.00%, and 4.44% for the patients without thrombus, respectively ( P = .0391). Compared with the CC genotype, the G allele carriers (CG + GG) had a 2.79-fold increased risk of thrombus or severe spontaneous echocontrast (SEC). These results suggest that IL-6 −634C/G polymorphism is associated with thrombus and severe SEC, and the G allele is an independent risk for thrombus and severe SEC in Han Chinese patients with AF.
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Affiliation(s)
- Xin-Tao Deng
- Department of Cardiology, Xinghua People’s Hospital, Xinghua, China
| | - Min-Hui Jiang
- Department of Cardiology, Affiliated Hospital of Nantong University, Nantong, China
| | - Jian-Hua Zhu
- Department of Cardiology, Affiliated Hospital of Nantong University, Nantong, China
| | - Li-Jun Ge
- Department of Cardiology, Ningxia People’s Hospital, Yinchuan, China
| | - Jing Guo
- Department of Cardiology, Fourth People’s Hospital of Wuxi, Wuxi, China
| | - Shu-Ping Gao
- Department of Cardiology, Ningxia People’s Hospital, Yinchuan, China
| | - Jin-Guo Zheng
- Department of Cardiology, Xinghua People’s Hospital, Xinghua, China
| | - Hong Luan
- Department of Cardiology, Ningxia People’s Hospital, Yinchuan, China
| | - Gui-Liang Shi
- Department of Cardiology, Xinghua People’s Hospital, Xinghua, China
| | - Ru-Xing Wang
- Department of Cardiology, Wuxi People’s Hospital, Wuxi, China
| | - Hai-Feng Shi
- Department of Cardiology, Shanghai Chest Hospital, Shanghai, China
| | - Min Pan
- Department of Cardiology, Affiliated Hospital of Nantong University, Nantong, China
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Míguez MJ, Rosenberg R, Burbano-Levy X, Carmona T, Malow R. The effect of alcohol use on IL-6 responses across different racial/ethnic groups. Future Virol 2012; 7:205-213. [PMID: 23565120 DOI: 10.2217/fvl.12.3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
AIMS Chronic inflammation has become increasingly recognized as a health threat for people living with HIV, given its associations with multiple diseases. Accordingly, the scientific community has prioritized the need to identify mechanisms triggering inflammation. PARTICIPANTS METHODS A clinic-based case-control study was designed to elucidate the plausible effects of alcohol use on IL-6. Peripheral blood mononuclear cells for measuring IL-6 culture supernatant and plasma for HIV assessments were collected from 59 hazardous alcohol users and 66 nonhazardous alcohol users, who were matched according to their age, gender and US CDC HIV severity status. RESULTS Stimulated peripheral blood mononuclear cells produced significantly higher amounts of IL-6 in hazardous alcohol users compared with nonhazardous alcohol users. However, racial status and receiving HAART significantly moderated this effect. Notably, in both HAART and non-HAART scenarios, IL-6 levels were associated with CD4 counts and viral burden. A distinctive IL-6 production pattern across racial/ethnic groups was also evident and showed that, when prescribed HAART, Hispanic hazardous alcohol users have a particularly high risk of morbidity compared with their Caucasian and African-American counterparts. After adjusting for confounders (e.g., sociodemographics and HIV disease status), regression analyses confirmed that chronic inflammation, as indicated by IL-6 levels (log), is associated with alcohol use, race/ethnicity and thrombocytopenia, and tended to be related to concurrent smoking. CONCLUSION Our data confirm that, despite HAART, people living with HIV still have a persistent inflammatory response that, in our study, was associated with chronic hazardous alcohol use. The data also highlight racial/ethnic disparities in IL-6 that justify further investigations.
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Affiliation(s)
- María José Míguez
- School of Integrated Sciences & Humanity, Florida International University, Modesto A Maidique Campus, DM 445, 11200 SW 8th Street, Miami, FL 33199, USA
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Abstract
Low-grade inflammation, a minor elevation in the baseline concentration of inflammatory markers such as C-reactive protein (CRP), is nowadays recognized as an important underlying condition in many common diseases. Concentrations of CRP under 10 mg/1 are called low-grade inflammation and values above that are considered as clinically significant inflammatory states. Epidemiological studies have revealed demographic and socioeconomic factors that associate with CRP concentration; these include age, sex, birth weight, ethnicity, socioeconomic status, body mass index (BMI), fiber consumption, alcohol intake, and dietary fatty acids. At the molecular level, production of CRP is induced by proinflammatory cytokines IL-1, IL-6, and IL-17 in the liver, although extra hepatic production most likely contributes to systemic concentrations. The cytokines are produced in response to, for example, steroid hormones, thrombin, C5a, bradykinin, other cytokines, UV-light, neuropeptides and bacterial components, such as lipopolysaccharide. Cytokines exert their biological effects on CRP by signaling through their receptors on hepatic cells and activating different kinases and phosphatases leading to translocation of various transcription factors on CRP gene promoter and production of CRP protein. Genetic polymorphisms in the interleukin genes as well as in CRP gene have been associated with minor elevation in CRP. As minor elevation in CRP is associated with both inflammatory and noninflammatory conditions, it should be noticed that the elevation might just reflect distressed or injured cells homeostasis maintenance in everyday life, rather than inflammation with classical symptoms of redness, swelling, heat, and pain.
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Affiliation(s)
- Carita M Eklund
- Department of Microbiology and Immunology, University of Tampere, Medical School, 33520 Tampere, Finland.
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Sunyer J, Forastiere F, Pekkanen J, Plana E, Kolz M, Pistelli R, Jacquemin B, Bruske-Hohlfeld I, Pitsavos C, Bellander T, Koenig W, Peters A. Interaction between smoking and the interleukin-6 gene affects systemic levels of inflammatory biomarkers. Nicotine Tob Res 2009; 11:1347-53. [DOI: 10.1093/ntr/ntp144] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Inflammation as a cardiovascular risk factor and pulse wave velocity as a marker of early-stage atherosclerosis in the Japanese population. Environ Health Prev Med 2009; 14:159-64. [PMID: 19568843 DOI: 10.1007/s12199-009-0080-2] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2008] [Accepted: 02/13/2009] [Indexed: 10/21/2022] Open
Abstract
Inflammation and pulse wave velocity (PWV) are a potential risk factor and marker, respectively, for atherosclerosis in the primary prevention setting. Atherosclerosis is now generally accepted to be an inflammatory disorder of the arterial wall, and the high-sensitivity C-reactive protein (hs-CRP) level has been reported to be a strong predictor of cardiovascular events. High-sensitivity-CRP is associated with two factors related to inflammation: (1) the local production of CRP by atheromatous tissue or coronary artery smooth muscle cells and (2) adipose tissue as a potent source of inflammatory cytokines. Based on studies in North America and Europe, hs-CRP has been established as a cardiovascular risk factor and a cut-off value has been recommended. However, Japanese have lower hs-CRP values than their Western counterparts, partly because Japanese have a lower body mass index (BMI), which correlates positively to hs-CRP, and partly because lifestyle and genetic factors can affect hs-CRP values. Therefore, a cut-off value needs to be established by cohort studies for the Japanese population. Carotid-femoral PWV is most commonly measured by applanation tonometry, particularly in Europe, but this method is critically dependent upon the accurate placing of transducers over the arteries and is both time-consuming and complex. A novel device has been recently developed in Japan that measures brachial-ankle PWV (baPWV) using a volume-rendering method. Brachian-ankle PWV is a suitable screening method because of its technical simplicity and shorter measurement time. It is associated not only with conventional cardiovascular risk factors but also with new risk factors, such as inflammation, gamma-glutamyltransferase, chronic kidney disease, and psychosocial factors. However, a suitable cut-off value has yet to be established.
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Koh SJ, Jang Y, Hyun YJ, Park JY, Song YD, Shin KK, Chae JS, Kim BK, Ordovas JM, Lee JH. Interleukin-6 (IL-6) -572C-->G promoter polymorphism is associated with type 2 diabetes risk in Koreans. Clin Endocrinol (Oxf) 2009; 70:238-44. [PMID: 18573122 DOI: 10.1111/j.1365-2265.2008.03315.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
OBJECTIVE Increased levels of inflammatory markers, such as interleukin-6 (IL-6), are associated with type 2 diabetes (T2DM). We investigated the association of IL-6 gene polymorphisms with T2DM and circulating levels of IL-6 in Koreans. SUBJECTS A total of 1477 subjects with normal glucose tolerance and 476 T2DM patients were included. MEASUREMENTS We examined IL-6 -174G-->C, -572C-->G, -597G-->A and -1363G-->T promoter region polymorphisms. The main outcome measures were the odds ratio (OR) on T2DM risk and serum concentrations of IL-6 and high-sensitivity C-reactive protein (hs-CRP). RESULTS Homozygosity for the rare G allele IL-6 -572C-->G was associated with a higher risk of T2DM [OR 1.69 (95%CI 1.11-2.58), P = 0.015]. Serum IL-6 concentrations were associated with the IL-6 -572C-->G genotype in control subjects (G/G: 2.33 +/- 0.41: C/G: 1.53 +/- 0.09: C/C: 1.72 +/- 0.08 ng/l, P = 0.023). Also in the control group, subjects homozygous for the rare G allele showed significantly higher concentrations of hs-CRP than C/C and C/G carriers (G/G: 13.6 +/- 2.9: C/G: 9.2 +/- 0.6: C/C: 7.8 +/- 0.4 mg/l, P = 0.003). The C-allele at the IL-6 -174 SNP was very rare (< 0.01) and -597G-->A and -1363G-->T were monomorphic in this population. CONCLUSIONS Our data demonstrate that the IL-6 -572G/G genotype is associated with higher serum IL-6 and hs-CRP concentrations and with increased risk for T2DM.
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Affiliation(s)
- Soo Jeong Koh
- Yonsei University Research Institute of Science for Ageing, Yonsei University, Seodaemun-Gu, Seoul, Korea
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Abstract
PURPOSE OF REVIEW We examine the reasons for investigating gene-environment interactions and address recent reports evaluating interactions between genes and environmental modulators in relation to cardiovascular disease and its common risk factors. RECENT FINDINGS Studies focusing on smoking, physical activity, and alcohol and coffee consumption are observational and include relatively large sample sizes. They tend to examine single genes, however, and fail to address interactions with other genes and other correlated environmental factors. Studies examining gene-diet interactions include both observational and interventional designs. These studies are smaller, especially those including dietary interventions. Among the reported gene-diet interactions, it is important to highlight the strengthened position of APOA5 as a major gene that is involved in triglyceride metabolism and modulated by dietary factors, and the identification of APOA2 as a modulator of food intake and obesity risk. SUMMARY The study of gene-environment interactions is an active and much needed area of research. Although technical barriers of genetic studies are rapidly being overcome, inclusion of comprehensive and reliable environmental information represents a significant shortcoming of genetics studies. Progress in this area requires inclusion of larger populations but also more comprehensive, standardized, and precise approaches to capturing environmental information.
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Affiliation(s)
- Jose M Ordovas
- Nutrition and Genomics Laboratory, JM-USDA Human Nutrition Research Center on Aging at Tufts University, Boston, Massachusetts 02111, USA.
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Iwamoto S. Are Promoter Polymorphisms of Interleukin 6 Ready to Be Applied in Genetic Markers of Cardiovascular Diseases? Hypertens Res 2007; 30:575-6. [PMID: 17785923 DOI: 10.1291/hypres.30.575] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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