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G-protein beta 3 subunit polymorphisms and essential hypertension: a case-control association study in northern Han Chinese. JOURNAL OF GERIATRIC CARDIOLOGY : JGC 2015; 12:127-34. [PMID: 25870615 PMCID: PMC4394327 DOI: 10.11909/j.issn.1671-5411.2015.02.004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/29/2014] [Revised: 11/19/2014] [Accepted: 12/17/2014] [Indexed: 12/26/2022]
Abstract
OBJECTIVE To explore the association between the three polymorphisms [ C825T, C1429T and G(-350)A] of the gene encoding the G protein beta 3 subunit (GNB3) and hypertension by performing a case-control study in the northern Han Chinese population. METHODS We recruited 731 hypertensive patients and 673 control subjects (the calculated power value was > 0.8). Genotyping was performed to identify C825T, C1429T and G(-350)A polymorphisms using the TaqMan assay. Comparisons of allelic and genotypic frequencies between cases and controls were made by using the chi-square test. Logistic regression analyses were performed to investigate the relationships between the three polymorphisms of GNB3 gene under different genetic models (additive, dominant and recessive models). RESULTS The genotype distribution and allele frequencies of C825T, C1429T and G(-350)A polymorphisms did not differ significantly between hypertensive patients and control subjects, either when the full sample was assessed, or when the sample was stratified by gender. No significant association was observed between C825T, C1429T and G(-350)A polymorphisms and the risk of essential hypertension in any genetic model. Linkage disequilibrium was only detected between C825T and C1429T polymorphisms. Haplotype analyses observed that none of the three estimated haplotypes significantly increased the risk of hypertension. CONCLUSIONS Our study suggested that the GNB3 gene polymorphisms [C825T, C1429T and G(-350)A] were not significantly associated with essential hypertension in northern Han Chinese population.
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Multivariate meta-analysis of the association of G-protein beta 3 gene (GNB3) haplotypes with cardiovascular phenotypes. Mol Biol Rep 2014; 41:3113-25. [PMID: 24477587 DOI: 10.1007/s11033-014-3171-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2013] [Accepted: 01/16/2014] [Indexed: 10/25/2022]
Abstract
The objective of the present study was to review previous investigations on the association of haplotypes in the G-protein β3 subunit (GNB3) gene with representative cardiovascular risk factors/phenotypes: hypertension, overweight, and variation in the systolic and diastolic blood pressures (SBP and DBP, respectively) and as well as body mass index (BMI). A comprehensive literature search was undertaken in Pubmed, Web of Science, EMBASE, Biological Abstracts, LILACS and Google Scholar to identify potentially relevant articles published up to April 2011. Six genetic association studies encompassing 16,068 participants were identified. Individual participant data were obtained for all studies. The three most investigated GNB3 polymorphisms (G-350A, C825T and C1429T) were considered. Expectation-maximization and generalized linear models were employed to estimate haplotypic effects from data with uncertain phase while adjusting for covariates. Study-specific results were combined through a random-effects multivariate meta-analysis. After carefully adjustments for relevant confounding factors, our analysis failed to support a role for GNB3 haplotypes in any of the investigated phenotypes. Sensitivity analyses excluding studies violating Hardy-Weinberg expectations, considering gender-specific effects or more extreme phenotypes (e.g. obesity only) as well as a fixed-effects "pooled" analysis also did not disclose a significant influence of GNB3 haplotypes on cardiovascular phenotypes. We conclude that the previous cumulative evidence does not support the proposal that haplotypes formed by common GNB3 polymorphisms might contribute either to the development of hypertension and obesity, or to the variation in the SBP, DBP and BMI.
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Guo L, Zhang LL, Zheng B, Liu Y, Cao XJ, Pi Y, Li BH, Li JC. The C825T polymorphism of the G-protein β3 subunit gene and its association with hypertension and stroke: an updated meta-analysis. PLoS One 2013; 8:e65863. [PMID: 23799054 PMCID: PMC3682991 DOI: 10.1371/journal.pone.0065863] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2012] [Accepted: 04/29/2013] [Indexed: 12/20/2022] Open
Abstract
OBJECTIVE Several epidemiological studies have evaluated the association between the GNB3 C825T polymorphism and hypertension or stroke. The results of these studies were inconsistent; therefore, we performed a meta-analysis to clarify these discrepancies. METHODS We systematically searched the PubMed, Embase, Web of Science, CNKI, and CBM databases, and manually searched reference lists of relevant papers, meeting abstracts, and relevant journals. Pooled odds ratios (ORs) and 95% confidence intervals (CIs) were calculated for dominant, recessive, and allelic models. A fixed or random effects model was separately adopted depending on study heterogeneity. Subgroup and sensitivity analyses were performed to detect study heterogeneity and examine result stability, respectively. Publication bias was tested using funnel plots, the Egger's regression test, and Begg's test. RESULTS We screened 66 studies regarding hypertension and eight concerning stroke. A combined analysis showed that only the allelic model found a marginal association with hypertension (OR = 1.07, 95% CI = 1.01-1.13) and female gender (OR = 1.11, 95% CI = 0.99-1.24). However, no comparison models found an association with stroke (allelic model: OR = 1.11, 95% CI = 0.94-1.32; dominant model: OR = 1.16, 95% CI = 0.92-1.48; and recessive model: OR = 1.05, 95% CI = 0.97-1.14). Sensitivity analysis suggested that all models did not yield a relationship to hypertension or stroke among Asians. Besides, there was a lack of statistical association with hypertension in Caucasians, which maybe due to a small sample size. When we restricted the included studies to normal populations according to the Hardy-Weinberg equilibrium, no association was found. CONCLUSIONS There was no evidence indicating that the 825T allele or TT genotype was associated with hypertension or stroke in Asians or hypertension in Caucasians. However, further studies regarding Africans and other ethnicities are needed to identify further correlations.
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Affiliation(s)
- Lu Guo
- Department of Neurology, Institute of Surgery Research, Daping Hospital, Third Military Medical University, Yuzhong District, Chongqing, PR China
| | - Li-Li Zhang
- Department of Neurology, Institute of Surgery Research, Daping Hospital, Third Military Medical University, Yuzhong District, Chongqing, PR China
| | - Bo Zheng
- Department of Neurology, Southwest Hospital, Third Military Medical University, Shapingba District, Chongqing, PR China
| | - Yun Liu
- Department of Neurology, Institute of Surgery Research, Daping Hospital, Third Military Medical University, Yuzhong District, Chongqing, PR China
| | - Xiao-Jie Cao
- Department of Neurology, Institute of Surgery Research, Daping Hospital, Third Military Medical University, Yuzhong District, Chongqing, PR China
| | - Yan Pi
- Department of Neurology, Institute of Surgery Research, Daping Hospital, Third Military Medical University, Yuzhong District, Chongqing, PR China
| | - Bing-Hu Li
- Department of Neurology, Institute of Surgery Research, Daping Hospital, Third Military Medical University, Yuzhong District, Chongqing, PR China
| | - Jing-Cheng Li
- Department of Neurology, Institute of Surgery Research, Daping Hospital, Third Military Medical University, Yuzhong District, Chongqing, PR China
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Bagos PG, Elefsinioti AL, Nikolopoulos GK, Hamodrakas SJ. The GNB3 C825T polymorphism and essential hypertension: a meta-analysis of 34 studies including 14,094 cases and 17,760 controls. J Hypertens 2007; 25:487-500. [PMID: 17278960 DOI: 10.1097/hjh.0b013e328011db24] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
OBJECTIVES The C825T single nucleotide polymorphism of the G-protein beta3 (GNB3) has been implicated in susceptibility to essential hypertension, through the expression of an alternatively spliced truncated variant. In an effort to clarify earlier inconclusive results, we performed a meta-analysis of population-based case-control genetic association studies. METHODS Random-effects methods were applied on summary data in order to combine the results of the individual studies. RESULTS We identified in total 34 studies, including 14,094 hypertensive cases and 17,760 controls. The TT versus CC + CT contrast yielded an overall odds ratio (OR) of 1.08 [95% confidence interval (CI): 1.01, 1.15], the contrast of TT + CT versus CC, an OR of 1.17 (95% CI: 1.06, 1.29), whereas that of the T allele versus C allele yielded a non-significant OR of 1.05 (95% CI: 0.98, 1.13). There was moderate evidence for a publication bias in the latter two contrasts, which was eliminated after excluding studies not in Hardy-Weinberg equilibrium and those performed on non-normal populations (those with a diagnosis of diabetes, obesity and myocardial infarction). Subgroup analyses revealed that non-significant estimates arose from studies on Asian populations, as opposed to the Caucasian ones. Furthermore, the frequency of the T allele was lower in Caucasians and these populations were found to inhabit higher latitudes. CONCLUSIONS The findings are in agreement with a recently proposed causal model for systolic blood pressure, which correlates it with the T allele and the absolute latitude. Further studies are needed in order to fully address questions about the aetiological mechanism of the particular association, as well as to study the effect in populations of African descent.
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Affiliation(s)
- Pantelis G Bagos
- Department of Cell Biology and Biophysics, Faculty of Biology, University of Athens, Panepistimiopolis, Athens, Greece.
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Suwazono Y, Kobayashi E, Uetani M, Miura K, Morikawa Y, Ishizaki M, Kido T, Nakagawa H, Nogawa K. G-protein beta3 subunit variant C825T is a risk factor for hypertension in Japanese females--a prospective cohort study over 5 years. Ann Hum Genet 2006; 70:767-77. [PMID: 17044851 DOI: 10.1111/j.1469-1809.2006.00284.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The relationship between the G-protein beta3 subunit variant C825T and risk of hypertension was examined in a prospective cohort study of Japanese workers. This study included observations over a 5-year period from 1997 to 2002 on 878 males and 692 females who were normotensive at entry. Hypertension was defined as systolic blood pressure > or =140 mmHg and/or diastolic blood pressure > or =90 mmHg, or taking antihypertensive medication. Pooled logistic regression analyses were performed using C825T genotype, age, body mass index, lifestyle, and the result of blood chemistries as the covariates. Multivariate pooled logistic regression analysis showed the risk of hypertension was 2.31 times higher in females with the TT genotype than in females with the CC genotype (95% confidence interval: 1.07-4.96), after adjustment for the effects of other potential covariates. In contrast, no significant risk of hypertension was observed with the TT genotype in male subjects. This study indicates that the 825T allele is an independent risk factor for hypertension in Japanese females, and suggests that this polymorphism may be a beneficial prognostic marker for hypertension in the general Japanese female population.
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Affiliation(s)
- Y Suwazono
- Department of Occupational and Environmental Medicine, Graduate School of Medicine, Chiba University, 1-8-1 Inohana, Chuo-ku, Chiba 260-8670, Japan.
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Yamagishi K, Tanigawa T, Cui R, Tabata M, Ikeda A, Yao M, Shimamoto T, Iso H. G-protein beta-3 subunit C825T polymorphism, sodium and arterial blood pressure: a community-based study of Japanese men and women. Ann Hum Genet 2006; 70:759-66. [PMID: 17044850 DOI: 10.1111/j.1469-1809.2006.00276.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Epidemiological evidence on gene-environment effects of the G-protein beta-3 subunit C825T polymorphisms and sodium on blood pressure in the free-living general population is limited. We examined the associations between the C825T polymorphism and blood pressure levels, stratified by the sodium variables estimated by 24-h urinary sodium excretion and a dietary questionnaire, among 1,471 men and women aged 30-74 from a community in Japan. Our a priori hypothesis was that individuals with the 825T allele have elevated blood pressure among subjects with a high sodium intake. Among the whole group, the systolic blood pressure level was +2.2 mmHg (p = 0.10) higher in TT than CC genotype individuals after adjustment for sex, age, antihypertensive medication use, body mass index, and alcohol consumption. This difference was more evident among individuals with low sodium excretion (+4.5 mmHg, p = 0.01), low present sodium intake (+3.2 mmHg, p = 0.11), and low past sodium intake (+4.8 mmHg, p = 0.02). No associations were observed among those with high sodium variables. Our results indicate that the G-protein beta-3 subunit C825T polymorphism is associated with higher systolic blood pressure levels in a large free-living Japanese population, and more specifically in women with a low sodium intake. This finding helps to explain part of the discrepancy between the previously reported genetic association among different ethnic groups.
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Affiliation(s)
- K Yamagishi
- Department of Public Health Medicine, Institute of Community Medicine, Graduate School of Comprehensive Human Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba 305-8575, Japan.
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Suwazono Y, Kobayashi E, Uetani M, Miura K, Morikawa Y, Ishizaki M, Kido T, Nakagawa H, Nogawa K. G-protein beta 3 subunit polymorphism C1429T and low-density lipoprotein receptor-related protein 5 polymorphism A1330V are risk factors for hypercholesterolemia in Japanese males--a prospective study over 5 years. Metabolism 2006; 55:751-7. [PMID: 16713434 DOI: 10.1016/j.metabol.2006.01.011] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/02/2005] [Accepted: 01/18/2006] [Indexed: 11/21/2022]
Abstract
We examined the relationship between the C825T, C1429T, and A-350G variants in the G-protein beta 3 subunit (GNB3) gene, the A1330V and Q89R variants in the low-density lipoprotein receptor-related protein 5 (LRP5) gene, and the risk of hypercholesterolemia in a prospective study in Japanese workers. This study included observations over a 5-year period from 1997 to 2002 on 936 males and 662 females who were not hypercholesterolemic on entry. Hypercholesterolemia was defined as a serum total cholesterol level of 240 mg/dL or higher. Pooled logistic regression analyses were performed using either of the gene variants with age, body mass index, smoking, alcohol consumption, and habitual exercise as the covariates. The risk of the development of hypercholesterolemia was 2.27 times higher in males with the TT genotype of GNB3/C1429T than in males with the CC genotype (95% confidence interval, 1.04-4.94), after adjustment for the effects of other potential covariates. Simultaneously, the risk was 1.49 times higher in males with the AV genotype of LRP5/A1330V than in males with the AA genotype (95% confidence interval, 1.04-2.12) after adjustment for the effects of other potential covariates. This study indicates the GNB3/C1429T and LRP5/A1330V are independent risk factors for hypercholesterolemia in Japanese males and suggests that targeting these polymorphisms may be beneficial when attempting to prevent hypercholesterolemia in the general Japanese male population.
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Affiliation(s)
- Yasushi Suwazono
- Department of Occupational and Environmental Medicine (A2), Graduate School of Medicine, Chiba University, Chiba 260-8670, Japan.
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Suwazono Y, Kobayashi E, Uetani M, Miura K, Morikawa Y, Ishizaki M, Kido T, Nakagawa H, Nogawa K. G-protein beta3 subunit gene variant is unlikely to have a significant influence on serum uric acid level in Japanese workers. TOHOKU J EXP MED 2006; 209:149-57. [PMID: 16707857 DOI: 10.1620/tjem.209.149] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The C825T variant of the G-protein beta3 subunit (GNB3) gene has attracted renewed attention as a candidate gene for obesity, hypertension and hyperuricemia. The main role of G-protein is to translate signals from the cell surface into a cellular response. The 825T allele is associated with a splice variant of GNB3 protein and enhanced G-protein activation. We examined the relationship between this variant and the risk of hyperuricemia in Japanese workers. The study subjects were 1,452 men and 1,169 women selected from 3,834 men and 2,591 women in 1997. On the basis of common clinical criteria, hyperuricemia I was defined as serum uric acid >or= 7.0 mg/dl in men and 6.0 mg/dl in women or taking antihyperuricemic medication. The hyperuricemia I group consisted of 186 men and 20 women and its control of 1,266 men and 1,149 women. Hyperuricemia II was defined as serum uric acid > 5.7 mg/dl (median) in men and 3.9 mg/dl (median) in women or taking antihyperuricemic medication. The hyperuricemic II group consisted of 684 men and 570 women and its control of 768 men and 599 women. To replicate previous significant results in young Caucasian men, we selected these criteria because the authors of the study in young Caucasian men adopted the median in their subjects as a cut-off. The statistical power was estimated as 99% based on the significant results in Caucasians. Genotype and allele distributions in men and women with hyperuricemia I and II were not significantly different from those in the corresponding control groups. Logistic regression analysis on hyperuricemia I and II, and multiple regression on serum uric acid level demonstrated no significant effect of the C825T genotype. Despite the sufficient statistical power, this study could not demonstrate the significant influence of C825T on hyperuricemia or serum uric acid. The targeting of this polymorphism is unlikely to be beneficial in the prevention of hyperuricemia in the general Japanese population.
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Affiliation(s)
- Yasushi Suwazono
- Department of Occupational and Environmental Medicine, Graduate School of Medicine, Chiba University, 1-8-1 Inohana, Chiba 260-8670, Japan.
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Suwazono Y, Kobayashi E, Uetani M, Miura K, Morikawa Y, Ishizaki M, Kido T, Nakagawa H, Nogawa K. Low-density lipoprotein receptor-related protein 5 variant A1330V is a determinant of blood pressure in Japanese males. Life Sci 2006; 78:2475-9. [PMID: 16289238 DOI: 10.1016/j.lfs.2005.10.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2005] [Revised: 09/30/2005] [Accepted: 10/03/2005] [Indexed: 11/22/2022]
Abstract
We examined the influence of the A1330V variant in the low-density lipoprotein receptor-related protein 5 gene on blood pressure in a large cohort of Japanese workers. This study used analysis of covariance in a multivariate general linear model to adjust for other potential factors such as age, body mass index, blood chemistry and lifestyle. The target subjects were 1440 males and 1169 females selected from 3834 male and 2591 female workers in a single company. Hypertension was defined as systolic blood pressure >or=140 mm Hg and/or diastolic blood pressure >or=90 mm Hg or the use of antihypertensive medications. Genotype distributions for A1330V in hypertensive males (AA=139(54.5%), AV=101(39.6%), VV=15(5.9%)) and females (AA=48(63.2%), AV=24(31.6%), VV=4(5.3%)) were not significantly different from normotensive males (AA=594(50.1%), AV=488(41.2%), VV=103(8.7%)) and females (AA=568(52.0%), AV=441(40.3%), VV=84(7.7%)). Allele distributions were not significantly different in either sex. In males, analysis of covariance showed that the VV genotype was associated with a 2.5 mm Hg lower diastolic blood pressure and a 2.3 mm Hg lower mean blood pressure than the AA genotype. This study indicates that the 1330V allele is an independent factor for lower diastolic and mean blood pressure in Japanese males.
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Affiliation(s)
- Yasushi Suwazono
- Department of Occupational and Environmental Medicine (A2), Graduate School of Medicine, Chiba University, 1-8-1 Inohana, Chiba 260-8670, Japan.
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Suwazono Y, Kobayashi E, Uetani M, Miura K, Morikawa Y, Ishizaki M, Kido T, Nakagawa H, Nogawa K. G-protein beta3 subunit gene variant (C825T) is unlikely to have a significant influence on serum total cholesterol level in Japanese workers. Clin Exp Hypertens 2006; 28:47-56. [PMID: 16443564 DOI: 10.1080/10641960500386700] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
We investigated the association between hypercholesterolemia or serum total cholesterol level and the C825T polymorphism in the G-protein ss3 subunit gene in Japanese workers using multivariate analysis to control possible confounding factors. The study subjects were 1,452 males and 1,169 females selected from 3,834 males and 2,591 females. Hypercholesterolemia was classified as either a total serum cholesterol $5.7 mmol/L (220 mg/dL) or taking lipid-lowering medication. The statistical power of the study was estimated as 99.9% based on total cholesterol levels of previous significant studies in Caucasians and Japanese. The genotype distributions in males with hypercholesterolemia (CC = 78, CT = 154, TT = 78) and females (CC = 60, CT = 137, TT = 52) were not significantly different from normal males (CC = 280, CT = 595, TT = 267) or females (CC = 234, CT = 501, TT = 185). Allele distributions also were not significantly different in either sex. Logistic regression analysis of hypercholesterolemia data and analysis of variance, t-test and multiple regression of serum total cholesterol data demonstrated no significant relationship with the C825T genotype. Despite sufficient statistical power, this study did not demonstrate a significant influence of C825T on hypercholesterolemia or serum total cholesterol level. The targeting of this polymorphism therefore is unlikely to be beneficial in preventing hypercholesterolemia in the general Japanese population.
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Affiliation(s)
- Yasushi Suwazono
- Department of Occupational and Environmental Medicine, Graduate School of Medicine, Chiba University, Chiba, Japan.
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Abstract
Heterotrimeric G proteins are key players in transmembrane signaling by coupling a huge variety of receptors to channel proteins, enzymes, and other effector molecules. Multiple subforms of G proteins together with receptors, effectors, and various regulatory proteins represent the components of a highly versatile signal transduction system. G protein-mediated signaling is employed by virtually all cells in the mammalian organism and is centrally involved in diverse physiological functions such as perception of sensory information, modulation of synaptic transmission, hormone release and actions, regulation of cell contraction and migration, or cell growth and differentiation. In this review, some of the functions of heterotrimeric G proteins in defined cells and tissues are described.
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Affiliation(s)
- Nina Wettschureck
- Institute of Pharmacology, University of Heidelberg, Im Neuenheimer Feld 366, D-69120 Heidelberg, Germany
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Abstract
A common C825T polymorphism in the gene GNB3, which encodes the beta 3 subunit of heterotrimeric G proteins, was identified in cell lines from patients with hypertension. The 825T allele is associated with increased intracellular signal transduction. Many population-based and case-control studies in different ethnicities have investigated an association between this polymorphism and hypertension, obesity, and atherosclerosis. A critical assessment of published studies suggests that 825T allele carriers have an increased risk for hypertension combined with features of the metabolic syndrome, such as dyslipidemia, hypercholesterolemia, insulin resistance, and obesity. It is anticipated that this polymorphism will be used in clinical practice to better characterize hypertension and for individualized treatment regimens.
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Affiliation(s)
- Winfried Siffert
- Institut für Pharmakologie, Universitätsklinikum Essen, Hufelandstr. 55, D-45147 Essen, Germany.
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