(Hypertension. 1996;28:881-887.)
© 1996 American Heart Association, Inc.
Articles |
INSERM SC7, Paris, France (F.C., S.R., C.M., O.P.); UMR 103 CNRS-Biomerieux, ENS, Lyon, France (A.T., L.G.); and the MONItoring of trends and determinants in CArdiovascular disease (MONICA) Projects of Belfast, UK (A.E.), and Strasbourg (D.A.), Lille (G.L.), and Toulouse (J.-B.R.), France.
Correspondence to Francois Cambien, INSERM SC7, 17 rue du Fer a Moulin, 75005 Paris, France. E-mail cambien@infobiogen.fr.
| Abstract |
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Pro, Arg25
Pro; and 1 in the region of the gene coding for the precursor part of the protein not present in the active form, Thr263
Ile. We analyzed these TGF-ß1 polymorphisms in 563 patients with myocardial infarction and 629 control subjects from four regions in Northern Ireland and France. The Pro25 allele was more frequent in patients than in control subjects in Belfast (P<.01) and Strasbourg (P<.05). The TGF-ß1 polymorphisms were not associated with the degree of angiographically assessed coronary artery disease in patients. The presence of a Pro25 allele was associated with a lower systolic pressure in the four control groups (P<.002), and a history of hypertension was significantly less frequent in homozygotes or heterozygotes for Pro25 than in homozygotes for Arg25 (odds ratio, 0.43; 95% confidence interval, 0.19 to 0.92; P<.03). Since the Pro25 allele was associated with an increased risk of myocardial infarction and a reduced risk of hypertension, we favor a cautious interpretation of these apparently inconsistent results. Other studies will need to verify whether these associations are real.
Key Words: transforming growth factors myocardial infarction polymorphism, genetic
| Introduction |
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In the present study, we assessed whether the TGF-ß gene was a candidate gene for CHD and hypertension. We identified several polymorphisms of the TGF-ß1 gene and investigated their associations with MI, coronary artery disease, blood pressure, hypertension, and other risk factors for CHD in the ECTIM Study.
| Methods |
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A coronary angiography was available for 93% of the French cases and 18% of the Irish cases. To avoid any selection bias, we report the angiography results only in French cases. Coronary angiograms were read in each recruitment center. As central reading was impossible, the number of major arteries with more than 50% stenosis was the only information recorded for assessment of the degree of coronary artery disease.
Informed consent was obtained from the subjects and their family doctors. The subjects were examined by especially trained staff and completed a set of questionnaires that included details of personal history, drug intake, and parental history of MI. Blood pressure was measured twice with a random-zero sphygmomanometer according to the standardized protocol of the MONICA project.14 Hypertension was defined by a clinical history of hypertension, presence of antihypertensive treatment, or diastolic pressure over 95 mm Hg. The assays used for measurement of plasma lipid variables and plasma levels of PAI-1 and fibrinogen in the ECTIM Study have been described.13 15 16
Identification of Polymorphisms on the TGF-ß1 Gene
For PCR-SSCP analysis17 18 of the TGF-ß1 gene, 20 individuals with MI were selected from the ECTIM Study. From the published sequences of the TGF-ß1 gene,19 20 17 overlapping fragments of approximately 250 bp were enzymatically amplified to cover the entire coding region and 2181 bp upstream of the coding region. Each amplification was performed with 500 ng genomic DNA in a total volume of 50 µL containing 10 mmol/L Tris-HCl (pH 9), 50 mmol/L KCl, 1.5 mmol/L MgCl2, 0.1% Triton X-100, 0.2 g/L bovine serum albumin, 200 µmol/L dNTPs, 25 pmol of each primer, and 0.2 U Taq polymerase (Appligene). For the SSCP analysis, 0.3 µCi of [
-32P]dCTP was added to the mix. The PCR fragments longer than 300 bp were restricted overnight by the addition of 2 or 5 U of the appropriate enzyme to yield fragments between 150 and 300 bp in length.21
Thereafter, products were diluted twofold in a solution containing 95% formamide, 10 mmol/L EDTA, 0.05% bromphenol blue, and 0.05% xylene cyanol. After denaturation at 95°C for 5 minutes, the samples were placed on ice and 4 µL was loaded onto nondenaturing 6% acrylamide gels (acrylamide-to-bisacrylamide ratio of 37.5:1). Two conditions were used for electrophoresis: 0% and 7.5% glycerol with migration performed at 40 W constant power for 5 hours at room temperature with a cooling fan. The gels were dried and exposed and autoradiographed at -80°C for 12 hours with an intensifying screen.
DNA from patients presenting a different SSCP pattern of migration was reamplified by PCR with unlabeled primers. PCR products were purified by centrifugation with Bio-spin 6 columns (Bio-Rad). Sequencing was performed by the method of Sanger et al22 in 20 PCR cycles with [
-32P]dATP end-labeled primer using a direct sequencing kit (Life Technologies).
Genotyping of All Subjects Included in the ECTIM Study
Genotyping of all subjects participating in the ECTIM Study was performed with allele-specific oligonucleotides.23 After enzymatic amplification, one fifth of the PCR product was denatured in 150 µL of 0.5 mol/L NaOH and 1.5 mol/L NaCl and blotted onto nylon membranes (N+, ICN). Each allele was detected after prehybridization by incubation of the membranes for 2 hours with 100 pmol of unlabeled oligonucleotide probe specific for the other allele, followed by incubation for 4 hours with 20 pmol of the labeled probe specific for the allele. The allele-specific oligonucleotides are listed in Table 1
. The melting temperature (Tm) used for hybridization was calculated by addition of 4°C for each G or C and 2°C for each T or A and subtraction of 5°C from the total. The membranes were washed twice at room temperature in 1x SSC for 5 minutes followed by 5 minutes in 0.5x SSC at temperatures of Tm minus 3°C.
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Statistical Analysis
When a putative risk factor is being considered, the MI case versus control difference is the main hypothesis tested in the ECTIM Study. If there is some suggestion of a difference, other end points are examined for investigation of the internal consistency of the result. These secondary end points include parental history of MI, the degree of coronary stenosis evaluated by angiography in cases, and various risk factors for which the investigated gene may be a candidate in control subjects. In the case of TGF-ß, blood pressure and hypertension were considered as secondary end points. Probability values are provided without adjustment for multiple comparisons.24 The hierarchy in the analytic strategy, the strong linkage disequilibrium among the loci, the associations among phenotypes, and above all the internal consistency of the results need to be considered when the results are being interpreted.
Data were analyzed with the SAS statistical software (SAS Institute). Continuous variables were compared between groups by ANOVA (SAS-PROC GLM); when required, adjustment on continuous covariates was performed by ANCOVA. Genotype frequencies were compared between genotypes, after adjustment on population by logistic regression analysis (SAS-PROC LOGISTIC). Odds ratios and their 95% confidence intervals were computed from the logistic regression coefficients and their standard errors. Homogeneity of the results according to population was tested by introduction into the model of the interaction term crossing populations and genotypes.
Hardy-Weinberg equilibrium was tested by a
2 test with 1 df. Pairwise linkage disequilibrium coefficients were estimated in the control samples; coefficients are reported as the ratio of the unstandardized coefficients to their minimal/maximal values (|D'|)25 ; the sign added in front of the coefficients indicates whether the linkage disequilibrium is positive or negative (Table 3
). The global heterozygosity provided by the polymorphisms was computed from the haplotype frequencies estimated with the myriad algorithm.26 Except for one TGF-ß polymorphism (TGF-ß509), only one genetic model grouping heterozygotes and less-frequent homozygotes was tested because the number of less-frequent homozygotes was small.
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| Results |
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Pro, Arg25
Pro, and Thr263
Ile (Table 2
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The polymorphisms were strongly associated with each other, as shown in Table 3
, which gives the coefficients of linkage disequilibrium between pairs of polymorphisms. A negative sign in front of the coefficient indicates that the less-frequent allele at one site is associated with the most-frequent allele at the other site; conversely, a positive sign indicates that the less-frequent alleles at both sites are preferentially associated. The similar allele frequencies and strong positive linkage disequilibrium existing between the +72 and codon 25 polymorphisms reflect the almost complete association between these two polymorphisms. The overall heterozygosity provided by the seven polymorphisms was 0.65.
The distributions of genotypes and alleles for the different polymorphisms in cases and control subjects are shown in Table 4
. No significant deviation of genotype frequencies from Hardy-Weinberg expectation was noted. Genotype and allele frequencies in cases and control subjects did not vary significantly across the four ECTIM populations (not shown), except for TGF-ß1509. The frequencies of the less-frequent allele at this locus in Belfast, Lille, Strasbourg, and Toulouse were 0.326, 0.313, 0.326, and 0.402, respectively, in control subjects (P<.06, 3 df) and 0.291, 0.376, 0.336, and 0.399 in cases (P<.05, 3 df), indicating a higher frequency of the less-frequent allele in Toulouse than in the other populations.
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The genotype distribution of the codon 25 polymorphism was significantly (P<.05) different between cases and control subjects. As a consequence of their strong mutual association, the +72 and codon 25 genotypes were very similarly distributed in cases and control subjects. The distributions of codon 25 genotypes and alleles in cases and control subjects in the different populations are shown in Table 5
. There was a significant excess of the Pro25 allele in cases in Belfast (P<.01) and Strasbourg (P<.05) but no significant excess in the two other populations. As it has been shown that Lp(a) inhibits the activation of TGF-ß127 28 and that this could be an important mechanism in the initiation and progression of atherosclerosis, we tested a possible interaction between plasma levels of Lp(a) and the TGF-ß1 codon 25 polymorphism on the risk of MI. In carriers of the Pro25 allele, the mean plasma levels of Lp(a) in patients and control subjects were 0.205 (SD, 0.235) and 0.101 (0.149) g/L, respectively (P<.001), whereas in Arg25 homozygotes, the means were 0.180 (0.228) and 0.099 (0.166) g/L, respectively (P<.0001); there was no significant heterogeneity across populations. We can conclude from this analysis that the codon 25 polymorphism does not influence the case-control difference of plasma Lp(a) level.
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In MI patients, a parental history of fatal or premature MI, presence of a previous MI, and history of hypertension were not associated with the codon 25 polymorphism (Table 6
) or any other TGF-ß1 polymorphism. Furthermore, among the 374 French MI patients who underwent coronary angiography, no association between any TGF-ß polymorphism and degree of stenosis could be detected (Table 6
).
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In control subjects, there was no association between TGF-ß1 genotypes and a number of quantitative traits investigated in the ECTIM Study, including age, body mass index, plasma lipids, lipoproteins and apolipoproteins, Lp(a), and plasma levels of fibrinogen and PAI-1. Conversely, a significant association between the codon 25 polymorphism and systolic pressure was observed (Table 7
). After adjustment for age, body mass index, and alcohol consumption, the presence of a Pro25 allele was associated with a lower systolic pressure in the four control groups (global P value adjusted on populations and covariates <.002). A similar trend was observed for diastolic pressure, but the association was not significant. In control subjects, a parental history of fatal or premature MI was not associated with the codon 25 polymorphism (Table 8
), but a history of hypertension was significantly less frequent in homozygotes and heterozygotes for Pro25 than in homozygotes for Arg25 (odds ratio, 0.43; 95% confidence interval, 0.19 to 0.92; P<.03).
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| Discussion |
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Among the seven common polymorphisms of the TGF-ß1 gene identified by PCR-SSCP and sequencing in the present study, those affecting codons 10 and 25 had already been observed by screening of two genomic DNA libraries, but they were thought to be artifactual.19 We are not aware of any former study investigating putative associations between polymorphisms of the TGF-ß gene and cardiovascular disorders.
The Leu10
Pro and Arg25
Pro polymorphisms of the TGF-ß1 gene are located in the signal peptide sequence that is cleaved from the TGF-ß1 precursor at the level of codon 29. The signal sequence allows export of the newly synthesized protein across the membranes of the endoplasmic reticulum. Signal peptides exhibit a unity of function despite having highly diverse sequences; however, they all comprise three regions: a positively charged N-terminal region, a central hydrophobic core, and a polar C-terminal region.29 The amino acid 10 polymorphism is located in the hydrophobic core; both Leu and Pro are apolar, and the polymorphism probably should not affect the function of the signal peptide. Conversely, the Arg25
Pro polymorphism corresponds to a change of a big polar amino acid for a small apolar one and is located close to the 3' end of the hydrophobic core. Different classes of signal sequence mutations changing one amino acid to another and affecting export efficiency have been described,30 and the importance of a change in charge in the hydrophobic core has been stressed. Whether the amino acid 25 polymorphism affects the export of the preproTGF-ß protein is thus possible and needs to be assessed experimentally.
The Thr263
Ile polymorphism is located in the part of the TGF-ß proprotein that is cleaved from the active part at the level of amino acid 278. It has been proposed that in addition to the transcriptional regulation, activation of latent TGF-ß is a component in the sequence of events leading to growth regulation by this growth factor.31 As a consequence, it is conceivable that the codon 263 polymorphism is involved in the activation process of TGF-ß.
The other four polymorphisms identified at positions -988, -800, -509, and +72 were all located in the 5' region of the gene. Their location does not correspond to any known consensus sequence; however, this does not formally exclude the possibility that they modulate the expression of the TGF-ß gene.
TGF-ß Gene Polymorphisms and MI
The Pro25 allele was more frequent in MI patients than in control subjects in Belfast and Strasbourg; the overall difference in the four populations was also significant, and there was no significant heterogeneity of the association across populations. An association with MI was observed for the +72 polymorphism, but this association was almost identical to that observed between the codon 25 polymorphism and MI. No associations between the polymorphisms and plasma lipids, lipoproteins, apolipoproteins, and coagulation factors were found in the control groups of the ECTIM Study.
It has been suggested that TGF-ß may interfere with the development of atherosclerosis, principally through its action on endothelial function.1 2 3 4 5 TGF-ß modulates the endothelial expression of several molecules involved in cell adhesion and spreading4 6 32 or in the regulation of vasomotor tone and cell proliferation.33 34 TGF-ß1 also preserves endothelial function35 and protects against reperfusion injury in several animal models of reperfusion after ischemia.36 Another mechanism linking TGF-ß and atherogenesis could involve an interaction with the fibrinolytic system. Human vascular smooth muscle cells (VSMCs) produce latent TGF-ß that is activated by the serine protease plasmin.31 Plasmin is produced from plasminogen by tissue plasminogen activator. Lp(a) and PAI-1 block the activation of latent TGF-ß by inhibiting tissue plasminogen activator. As a consequence, PAI-1 and Lp(a) promote VSMC proliferation in culture by relieving the autocrine inhibition caused by active TGF-ß.37 In the ECTIM Study, the association between plasma levels of Lp(a) and MI was similar in the different TGF-ß genotypes. We also performed a similar analysis with plasma PAI-1 instead of Lp(a) and found no interaction between plasma PAI-1 and TGF-ß genotypes.
TGF-ß Gene Polymorphisms and Blood Pressure
Through its effect on endothelial and VSMC function, TGF-ß1 could play a role in blood pressure regulation. TGF-ß1 potentiates the proliferative effect of several growth factors on VSMCs in spontaneously hypertensive rats but inhibits this effect in Wistar-Kyoto rats.8 Fluid shear stress induces endothelial TGF-ß1 transcription and production.9 It is thus possible that TGF-ß1 is involved in flow-induced vascular remodeling. TGF-ß induces fibrosis and angiogenesis in vivo and stimulates collagen formation in vitro.10 In the ECTIM Study, we found a significant association between the Arg25
Pro polymorphism and blood pressure that was consistent across the four populations. Carriers of the Pro25 allele had a systolic pressure 5 to 10 mm Hg lower than Arg25 homozygotes, depending on the population. As a consequence of this association, a history of hypertension was less frequent in Pro25 carriers than in Arg25 homozygotes: 9.3% versus 21.2% in Belfast and 11.3% versus 22.2% in France (global P<.03).
The lower frequency of allele Pro25 in hypertensive than in normotensive individuals appears to be inconsistent with the higher frequency of this allele in MI patients than in control subjects. Furthermore, in patients there was no association between the codon 25 polymorphism and parental history of MI, presence of a previous MI, and degree of angiographically assessed coronary artery disease. Given the partial inconsistency of the results, we favor a cautious interpretation of the associations found between the TGF-ß codon 25 polymorphism, MI, and blood pressure or hypertension in the present study. Other studies will have to verify whether these associations are real. However, the highly pleiotropic effect of TGF-ß according to cell types and pathophysiological circumstances and its likely implication in endothelial dysfunction, atherosclerosis, and vascular or cardiac remodeling1 2 3 4 5 6 7 8 9 10 11 might explain the apparently inconsistent effects of the TGF-ß1 polymorphism on MI and hypertension.
Quantitative phenotypes and disease end points other than those studied in the ECTIM Study ought to be investigated in relation to TGF-ß gene polymorphisms. TGF-ß1 may be involved in the arterial and cardiac remodeling induced by hypertrophic stimuli,11 suggesting that these remodeling processes might be associated with functional polymorphisms of the TGF-ß gene. Noncardiovascular phenotypes and diseases such as tissue repair after injury or fibrotic disorders of the kidney, liver, lung, skin, or central nervous system38 might also be associated with TGF-ß gene polymorphisms.
| Selected Abbreviations and Acronyms |
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| Acknowledgments |
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Received January 2, 1996;
first decision March 5, 1996; first decision June 3, 1996;
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J.-H. Mao, E. F. Saunier, J. P. de Koning, M. M. McKinnon, M. N. Higgins, K. Nicklas, H.-T. Yang, A. Balmain, and R. J. Akhurst Genetic variants of Tgfb1 act as context-dependent modifiers of mouse skin tumor susceptibility PNAS, May 23, 2006; 103(21): 8125 - 8130. [Abstract] [Full Text] [PDF] |
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W. Koch, P. Hoppmann, J. C. Mueller, A. Schomig, and A. Kastrati Association of Transforming Growth Factor-{beta}1 Gene Polymorphisms With Myocardial Infarction in Patients With Angiographically Proven Coronary Heart Disease Arterioscler Thromb Vasc Biol, May 1, 2006; 26(5): 1114 - 1119. [Abstract] [Full Text] [PDF] |
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A. M. Summers, B. M. Coupes, M. F. Brennan, S. A. Ralph, C. D. Short, and P. E. C. Brenchley VEGF -460 genotype plays an important role in progression to chronic kidney disease stage 5 Nephrol. Dial. Transplant., November 1, 2005; 20(11): 2427 - 2432. [Abstract] [Full Text] [PDF] |
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T Hamaguchi, S Okino, N Sodeyama, Y Itoh, A Takahashi, E Otomo, M Matsushita, H Mizusawa, and M Yamada Association of a polymorphism of the transforming growth factor-{beta}1 gene with cerebral amyloid angiopathy J. Neurol. Neurosurg. Psychiatry, May 1, 2005; 76(5): 696 - 699. [Abstract] [Full Text] [PDF] |
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V. G. Kaklamani, L. Baddi, J. Liu, D. Rosman, S. Phukan, C. Bradley, C. Hegarty, B. McDaniel, A. Rademaker, C. Oddoux, et al. Combined Genetic Assessment of Transforming Growth Factor-{beta} Signaling Pathway Variants May Predict Breast Cancer Risk Cancer Res., April 15, 2005; 65(8): 3454 - 3461. [Abstract] [Full Text] [PDF] |
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M van der Paardt, J B A Crusius, M A Garcia-Gonzalez, B A C Dijkmans, A S Pena, and I E van der Horst-Bruinsma Susceptibility to ankylosing spondylitis: no evidence for the involvement of transforming growth factor {beta}1 (TGFB1) gene polymorphisms Ann Rheum Dis, April 1, 2005; 64(4): 616 - 619. [Abstract] [Full Text] [PDF] |
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R. Sparks, J. Bigler, J. G Sibert, J. D Potter, Y. Yasui, and C. M Ulrich TGF{beta}1 polymorphism (L10P) and risk of colorectal adenomatous and hyperplastic polyps Int. J. Epidemiol., October 1, 2004; 33(5): 955 - 961. [Abstract] [Full Text] [PDF] |
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A. Ewart-Toland, J. M. Chan, J. Yuan, A. Balmain, and J. Ma A Gain of Function TGFB1 Polymorphism May Be Associated With Late Stage Prostate Cancer Cancer Epidemiol. Biomarkers Prev., May 1, 2004; 13(5): 759 - 764. [Abstract] [Full Text] [PDF] |
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D. J. Grainger Transforming Growth Factor {beta} and Atherosclerosis: So Far, So Good for the Protective Cytokine Hypothesis Arterioscler Thromb Vasc Biol, March 1, 2004; 24(3): 399 - 404. [Abstract] [Full Text] |
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L Wu, J Chau, R P Young, V Pokorny, G D Mills, R Hopkins, L McLean, and P N Black Transforming growth factor-{beta}1 genotype and susceptibility to chronic obstructive pulmonary disease Thorax, February 1, 2004; 59(2): 126 - 129. [Abstract] [Full Text] [PDF] |
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Z. Li, T. Habuchi, N. Tsuchiya, K. Mitsumori, L. Wang, C. Ohyama, K. Sato, T. Kamoto, O. Ogawa, and T. Kato Increased risk of prostate cancer and benign prostatic hyperplasia associated with transforming growth factor-beta 1 gene polymorphism at codon10 Carcinogenesis, February 1, 2004; 25(2): 237 - 240. [Abstract] [Full Text] [PDF] |
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E. Jaakkola, A. M. Crane, K. Laiho, I. Herzberg, A.-M. Sims, L. Bradbury, A. Calin, S. Brophy, M. Kauppi, K. Kaarela, et al. The effect of transforming growth factor {beta}1 gene polymorphisms in ankylosing spondylitis Rheumatology, January 1, 2004; 43(1): 32 - 38. [Abstract] [Full Text] [PDF] |
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S. Levesque, J.-M. Moutquin, C. Lindsay, M.-C. Roy, and F. Rousseau Implication of an AGT Haplotype in a Multigene Association Study With Pregnancy Hypertension Hypertension, January 1, 2004; 43(1): 71 - 78. [Abstract] [Full Text] [PDF] |
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A. Xaubet, A. Marin-Arguedas, S. Lario, J. Ancochea, F. Morell, J. Ruiz-Manzano, E. Rodriguez-Becerra, J. M. Rodriguez-Arias, P. Inigo, S. Sanz, et al. Transforming Growth Factor-{beta}1 Gene Polymorphisms Are Associated with Disease Progression in Idiopathic Pulmonary Fibrosis Am. J. Respir. Crit. Care Med., August 15, 2003; 168(4): 431 - 435. [Abstract] [Full Text] [PDF] |
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Y. Tang, M. L. McKinnon, L. M. Leong, S. A. B. Rusholme, S. Wang, and R. J. Akhurst Genetic modifiers interact with maternal determinants in vascular development of Tgfb1-/- mice Hum. Mol. Genet., July 1, 2003; 12(13): 1579 - 1589. [Abstract] [Full Text] [PDF] |
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A. M. Dunning, P. D. Ellis, S. McBride, H. L Kirschenlohr, C. S. Healey, P. R. Kemp, R. N. Luben, J. Chang-Claude, A. Mannermaa, V. Kataja, et al. A Transforming Growth Factor{beta}1 Signal Peptide Variant Increases Secretion in Vitro and Is Associated with Increased Incidence of Invasive Breast Cancer Cancer Res., May 15, 2003; 63(10): 2610 - 2615. [Abstract] [Full Text] [PDF] |
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H Schotte, P Willeke, S Rust, G Assmann, W Domschke, M Gaubitz, and B Schluter The transforming growth factor-{beta}1 gene polymorphism (G915C) is not associated with systemic lupus erythematosus Lupus, February 1, 2003; 12(2): 86 - 92. [Abstract] [PDF] |
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R. A. Lynch, L. Wagoner, S. Li, L. Sparks, J. Molkentin, and G. W. Dorn II Novel and nondetected human signaling protein polymorphisms Physiol Genomics, September 3, 2002; 10(3): 159 - 168. [Abstract] [Full Text] [PDF] |
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J P Pandey and E C LeRoy A profibrotic polymorphism (of TGF{beta}1) in systemic sclerosis Ann Rheum Dis, August 1, 2002; 61(8): 671 - 672. [Full Text] [PDF] |
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A Crilly, J Hamilton, C J Clark, A Jardine, and R Madhok Analysis of transforming growth factor {beta}1 gene polymorphisms in patients with systemic sclerosis Ann Rheum Dis, August 1, 2002; 61(8): 678 - 681. [Abstract] [Full Text] [PDF] |
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L Araria-Goumidi, J C Lambert, D M A Mann, C Lendon, B Frigard, T Iwatsubo, D Cottel, P Amouyel, and M C Chartier-Harlin Association study of three polymorphisms of TGF-{beta}1 gene with Alzheimer's disease J. Neurol. Neurosurg. Psychiatry, July 1, 2002; 73(1): 62 - 64. [Abstract] [Full Text] [PDF] |
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C.-J. Chiu, M.-L. Chang, C.-P. Chiang, L.-J. Hahn, L.-L. Hsieh, and C.-J. Chen Interaction of Collagen-related Genes and Susceptibility to Betel Quid-induced Oral Submucous Fibrosis Cancer Epidemiol. Biomarkers Prev., July 1, 2002; 11(7): 646 - 653. [Abstract] [Full Text] [PDF] |
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A. BAYAT, A. ALANSAR, A. H. HAJEER, M. SHAH, J. S. WATSON, J. K. STANLEY, M. W. J. FERGUSON, and W. E. R. OLLIER Genetic Susceptibility in Dupuytren's Disease: Lack of Association of a Novel Transforming Growth Factor {beta}2 Polymorphism in Dupuytren's Disease J Hand Surg Eur Vol., February 1, 2002; 27(1): 47 - 49. [Abstract] [PDF] |
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F Andreotti, I Porto, F Crea, and A Maseri Inflammatory gene polymorphisms and ischaemic heart disease: review of population association studies Heart, February 1, 2002; 87(2): 107 - 112. [Abstract] [Full Text] [PDF] |
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M. A. Rivera, M. Echegaray, T. Rankinen, L. Perusse, T. Rice, J. Gagnon, A. S. Leon, J. S. Skinner, J. H. Wilmore, D. C. Rao, et al. TGF-{beta}1 gene-race interactions for resting and exercise blood pressure in the HERITAGE Family Study J Appl Physiol, October 1, 2001; 91(4): 1808 - 1813. [Abstract] [Full Text] [PDF] |
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E. Ziv, J. Cauley, P. A. Morin, R. Saiz, and W. S. Browner Association Between the T29->C Polymorphism in the Transforming Growth Factor {beta}1 Gene and Breast Cancer Among Elderly White Women: The Study of Osteoporotic Fractures JAMA, June 13, 2001; 285(22): 2859 - 2863. [Abstract] [Full Text] [PDF] |
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R. W. Keen, H. Snieder, H. Molloy, J. Daniels, M. Chiano, F. Gibson, L. Fairbairn, P. Smith, A. J. MacGregor, D. Gewert, et al. Evidence of association and linkage disequilibrium between a novel polymorphism in the transforming growth factor {beta}1 gene and hip bone mineral density: a study of female twins Rheumatology, January 1, 2001; 40(1): 48 - 54. [Abstract] [Full Text] [PDF] |
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M. Yokota, S. Ichihara, T.-L. Lin, N. Nakashima, and Y. Yamada Association of a T29->C Polymorphism of the Transforming Growth Factor-{beta}1 Gene With Genetic Susceptibility to Myocardial Infarction in Japanese Circulation, June 20, 2000; 101(24): 2783 - 2787. [Abstract] [Full Text] [PDF] |
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L. Tiret, C. Mallet, O. Poirier, V. Nicaud, A. Millaire, J.-B. Bouhour, G.e. Roizes, M. Desnos, R. Dorent, K. Schwartz, et al. Lack of association between polymorphisms of eight candidate genes and idiopathic dilated cardiomyopathy: The CARDIGENE study J. Am. Coll. Cardiol., January 1, 2000; 35(1): 29 - 35. [Abstract] [Full Text] [PDF] |
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S. Lario, P. Inigo, J. M. Campistol, E. Poch, F. Rivera, and F. Oppenheimer Restriction Enzyme-based Method for Transforming Growth Factor-{beta}1 Genotyping: Nonisotopic Detection of Polymorphisms in Codons 10 and 25 and the 5'-Flanking Region Clin. Chem., August 1, 1999; 45(8): 1290 - 1292. [Full Text] [PDF] |
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M. Pahor, M. B. Elam, R. J. Garrison, S. B. Kritchevsky, and W. B. Applegate Emerging Noninvasive Biochemical Measures to Predict Cardiovascular Risk Arch Intern Med, February 8, 1999; 159(3): 237 - 245. [Abstract] [Full Text] [PDF] |
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B. Li, A. Khanna, V. Sharma, T. Singh, M. Suthanthiran, and P. August TGF-ß1 DNA Polymorphisms, Protein Levels, and Blood Pressure Hypertension, January 1, 1999; 33(1): 271 - 275. [Abstract] [Full Text] [PDF] |
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R. N. Re and E. D. Frohlich Controversies in the Genetic Analysis of Hypertensive Diseases Hypertension, November 1, 1996; 28(5): 880 - 880. [Full Text] |
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M. Suthanthiran, B. Li, J. O. Song, R. Ding, V. K. Sharma, J. E. Schwartz, and P. August Transforming growth factor-beta 1 hyperexpression in African-American hypertensives: A novel mediator of hypertension and/or target organ damage PNAS, March 28, 2000; 97(7): 3479 - 3484. [Abstract] [Full Text] [PDF] |
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