- Open Access
R353Q polymorphism in the factor VII gene and cardiovascular risk in Heterozygous Familial Hypercholesterolemia: a case-control study
Lipids in Health and Diseasevolume 10, Article number: 50 (2011)
Heterozygous Familial Hypercholesterolemia (FH) is a genetic disorder characterized by a high risk of cardiovascular disease. Certain polymorphisms of the factor VII gene have been associated with the development of coronary artery disease and there is a known association between factor VII levels and polymorphic variants in this gene. To date, no study has evaluated the association between factor VII and coronary artery disease in patients with FH.
This case-control study comprised 720 patients (546 with FH and 174 controls). We determined the prevalence and allele frequencies of the R353Q polymorphism of factor VII, the plasma levels of factor VII antigen (FVII Ag) and whether they could be predictive factors for cardiovascular risk. 75% (410) of the patients with FH were RR, 23% (127) RQ and 1.6% (9) QQ; in the control group 75.3% (131) were RR, 21.3% (37) RQ and 3.4% (6) QQ (p = 0.32). No statistically significant associations were observed in the distribution of genotypes and allele frequencies between case (FH) and control groups. Nor did we find differences when we evaluated the relationship between the R353Q polymorphism and cardiovascular risk (including coronary disease, ischemic stroke and peripheral arterial disease), either in the univariate analysis or after adjustment for sex, age, arterial hypertension, body mass index, xanthomas, diabetes, smoking, HDLc and LDLc and lipid-lowering treatment. The FVII Ag concentrations behaved in a similar fashion, with no differences for the interaction between controls and those with FH (RR vs. RQ/QQ; p = 0.96). In the subgroup of patients with FH no association was found among cardiovascular disease, genotype and FVII Ag levels (RR vs. RQ/QQ; p = 0.97).
Our study did not find a direct relationship between cardiovascular risk in patients with Heterozygous Familial Hypercholesterolemia, the R353Q polymorphism of factor VII and FVII Ag levels.
Heterozygous Familial Hypercholesterolemia (FH) is an autosomal codominant disease caused by defects in the low-density lipoprotein receptor (LDLR) gene . It is a genetic disorder characterized by elevated levels of plasma low-density lipoproteins cholesterol (LDLc) ranging from 300 to 400 mg/dl, corneal arcus, tendon xanthomas and a high prevalence of early-onset coronary disease. It is extremely heterogeneous, with an incidence of one in 500 persons (0.2%) [2, 3]. The study of the mechanisms that encourage the development of cardiovascular disease (CVD) is of great interest, given the variability both of the clinical picture and in the therapeutic response that characterizes this disease. Moreover, not all diagnosed patients present clinical symptoms, so a better understanding of the factors that lead to some patients developing early-onset CVD while others do not, would be very useful as a means of evaluating the risk and adopting preventive measures.
In patients at high CVD risk, such as patients with FH, there appears to be a chronic activation of the mechanisms of coagulation and hemostasis, which leads to what is regarded as a permanent prothrombotic condition [4, 5]. Thrombosis is the basis of the most acute manifestations of coronary artery disease. The atheromatous plaque rupture, with the consequent exposure of tissue factor to blood and its subsequent union with factor VII (FVII), initiates the coagulation cascade . One of the components of hemostasis that has aroused interest for its potential role in the development of coronary disease and stroke is FVII. Some studies have associated high levels of plasma FVII with an elevated risk of coronary artery disease [7–10], although these findings have not been confirmed by other studies leading to highly variable results [11, 12]. The R353Q polymorphism of the FVII gene has been among those most closely associated with variations in plasma levels of FVII [13–16]. This is a simple nucleotide polymorphism (SNP), characterized by the substitution of a guanine base by an adenine, which involves the substitution of arginine (R) by glutamine (Q) in codon 353 of this protein . Lower levels of FVII have been detected in carriers of the Q allele than in individuals who are homozygous for the more common R allele [17, 18]. Carriers of the Q allele may therefore be protected against acute thrombotic events, as has been demonstrated by a number of case-control studies in which the Q allele was associated with a reduced risk of acute myocardial infarct [19–24]; however, this association was weaker  or was not detected in another studies [26–28].
The principal objectives of this study were therefore to analyze the prevalence and allele frequency of the R353Q polymorphism and the plasma FVII levels in FH patients with or without CVD and in family members who were unaffected by FH (controls), and to determine whether the presence of this polymorphism could be a predictor of CVD risk in these patients.
Material and methods
Study design and study population
This was a case-control study of a sample population selected from a Spanish FH Longitudinal Cohort Study, supported by the "Fundación Española de Hipercolesterolemia Familiar" http://www.colesterolfamiliar.com. One person per familiy (index case) was also included. The clinical diagnosis of FH was made in accordance with the diagnostic criteria homogenized by the MEDPED international cooperative program, which is coordinated by the World Health Organization (WHO) . All patients with FH included in the study were heterozygous carriers for known functional mutations in the LDLR gene. This FH genetic diagnosis was carried out also in control patients, assuring the no-FH diagnosis. A written informed consent was obtained from all participants before their inclusion in the cohort and the protocol was approved by the ethic committee of the CEIC Fundación Jiménez Díaz (Madrid). STREGA criteria were used in the reporting of our study [30, 31].
We determined the polymorphism in 720 patients. Among them there were 546 persons affected by FH (cases) and 174 family members unaffected by FH (controls). Clinical data concerning sex, age, history of arterial hypertension (HT), smoking, diabetes mellitus (DM), body mass index (BMI), xanthomas, total cholesterol level, triglycerides, LDLc, high-density lipoproteins cholesterol (HDLc), treatment for hyperlipemia and CVD were collected.
The evaluation and definition of CVD events was based on the WHO MONICA project . CVD was classified as "early onset" when it occurred at an age of less than 55 years in men and 65 in women. CVD events were evaluated via analysis of the CVD history of the patient himself and those of his first-degree (parents, siblings and children) and second-degree (grandparents, aunts and uncles, cousins and nieces and nephews by blood) family who had a documented clinical history of a) ischemic cardiopulmonary (myocardial infarct, angina pectoris, surgery or any other coronary revascularization procedure), b) cerebrovascular disease or c) peripheral vascular disease.
On enrollment in the study, blood samples were obtained by venous puncture from fasting patients. Samples were sent to a central laboratory for the extraction of genomic DNA from the leukocyte fraction of fresh blood, using the Puregen® (DNA isolation kit, Gentra Systems, MN, U.S.A). The genomic DNA was used for the determination of the R353Q mutation of the FVII coagulation gene.
Determination of FVII polymorphism
FVII polymorphism was determined according to Lindman et al. , by real-time polymerase chain reaction (RT-PCR) (Stratagene Mx3005P Cultek) of a DNA region of exon 8 of the FVII coagulation gene. We used 150 ng of genomic DNA, 3 mM of MgCl2, 200 μM of each nucleotide, 1 IU of Hot Start polymerase and reaction buffer to 1X (Dominion-MBL).
The primers were mixed with the probe (GATGCCCGTCAGGTACCACGTGCCC (C/T) GGTAGTGGGTGGCATGTGGGCCTCC) to 1X in a final volume of 10 μl (Taqman®-Applied Biosystems). The DNA was denatured at 95°C for 5 min, followed by 40 cycles of denaturation at 95°C for 30 s, a phase of primer-polymerase union (60°C for 1 min) and extension (72°C for 30 s). The population genotypes were subsequently analyzed using the curves supplied by the RT-PRC equipment. In the R353Q assay, a guanine base is replaced by an adenine, which requires the substitution of arginine (R) by glutamine (Q) in codon 353 of this protein.
Standard good laboratory practices were undertaken to ensure the accuracy of genotype data, including the inclusion of dummy duplicates.
Determination of plasma FVII Ag concentrations
FVII Ag levels were determined using an Elisa Kit (AssayMax Human Factor VII ELISA Kit®, Assaypro) with a minimum detectable dose < 6 ng/ml and an intra and inter-assay coefficients of variation of 5.0 % and 7.1% respectively.
Quantification of plasma lipid levels
Plasma lipid levels (mg/dl) were determined by spectrophotometry (enzymetric colorimetry) in a Modular Analytics ISE-4-DDPPEEPP autoanalyzer (F. Hoffmann-La Roche, Basle, Switzerland); an oxidation-peroxidation method was employed to assay total cholesterol, HDLc and triglycerides; LDLc was estimated by Friedewald's formula (LDLc = total cholesterol - triglycerides/5-HDLc).
The SPSS statistical package (version 17.0 for Windows) was utilized for all statistical analyses, which comprised:
descriptive analysis of absolute and relative frequencies with 95% confidence intervals (CI) and means and standard deviations of the quantitative variables.
comparison of qualitative variables using chi-squared contingency tables; in the case of 2 × 2 tables, the chi-squared table alone was used, while if any expected frequency was < 5, Fisher's exact test was employed.
comparisons of the mean values of the quantitative variables by means of Student's t-test for two independent samples or single-factor analysis of variance for more than two independent samples.
In all the statistical tests, values of p < 0.05 were treated as significant and the hypothesized contrasts were bilateral.
In order to evaluate the association of the FVII genotype with CVD, we calculated the odds ratio (crude OR) and its 95% CI by univariate logistical regressions. In order to control for sex, age, HT, BMI, xanthomas, DM, LDLc, HDLc, smoking and lipid-lowering therapy, we employed a multivariate logistics model (adjusted OR).
The general characteristics of the patients are shown in Table 1. No significant differences were found in the following variables: sex, BMI, HT, DM or triglyceride levels between the FH and control groups. However there were differences in age, total cholesterol, LDLc and HDLc levels, xanthomas (102 of 546 HF patients developed them, 18.9%), in those patients under lipid-lowering treatment (more than 83% of the FH), in the number of CVD events as well as in global CVD and in the mean age of the first event.
In 14.7% of the patients with FH a CVD event occurred; 75 patients developed coronary artery disease, 4 cerebrovascular disease and 12 peripheral arterial disease. In the distribution by vascular territories, 71% of FH with CVD had affectation of a single territory while in 9%, two or more territories were affected, with a statistically significant difference in the distribution of the CVD events compared with the control group (p < 0.001). We must emphasize the low frequency of cerebrovascular disease in both the control (1.7%) and the FH group (0.7%), with no significant difference between them (p = 0.37). The frequency of peripheral vascular disease (predominantly in the lower extremities) was 2.1% in FH patients and 0.5% in the controls (p = 0.21).
The R353Q polymorphism
In the analysis of the R353Q genotypes distribution (Table 2), we found that 75.1% of the patients with FH were RR, 21.3% were RQ and 3.4% QQ, without any evidence of differences between the control and FH groups (p = 0.32). Similar results were obtained when we analyzed this genotypes distribution comparing RR vs RQ/QQ (p = 0.96). In the allele frequencies (R or Q allele presence), we found no statistically significant differences between case (FH) and control groups (0.86 and 0.87, IC 95% 0.82, 0.89 and 0.85, 0.89 respectively for the R allele; 0.14 and 0.13, IC 95% 0.11, 0.18 and 0.11, 0.15 respectively for the Q allele). The allele frequencies in both were adjusted to the Hardy-Weinberg equilibrium (p = 0.97 and p = 28, respectively).
Polymorphism and cardiovascular risk
In order to identify possible relationships between the different genotypes and higher or lower prevalence of CVD in FH patients (Table 3), we performed an univariate analysis. With respect to global CVD we found no statistical differences between carriers of the RR and RQ genotypes, just as in those subjects who were homozygous for the non-dominant gene (RR genotype). The separately analysis of coronary artery disease and peripheral vascular disease led to same results; this analysis could not be applied to cerebrovascular disease because of its low incidence (four subjects). Multivariate logistic regression analysis, adjusted for sex, age, HT, BMI, xanthomas, DM, HDLc, LDLc, smoking habit and treatment for hyperlipemia found no association between the genotypes of the FVII R353Q mutation and CVD.
FVII Ag levels
Plasma FVII Ag levels (ng/mL) were determined in a subgroup of 320 patients, 160 controls (including 8 with CVD) and 160 FH patients (80 with CVD). The genotypes distribution (RR vs RQ/QQ) between both groups was similar (p > 0.05). Analysis of variance for two factors (FH and genotype) adjusted for sex, age, DM, smoking, HT and CVD was applied and no differences were found in FVII Ag levels for the interaction between both factors (p = 0.96) (Table 4). We also studied the FVII Ag concentration in patients with FH (n = 160) depending on the presence or not of CVD; in the analysis of variance for CVD and genotype adjusted for age, sex, DM, smoking and HT no differences were found for the interaction between them (p = 0.97) (Table 5).
In our study, the R353Q polymorphism of the FVII gene, its allele frequency and the FVII Ag levels neither predict nor are directly related to the prevalence of CVD in FH patients.
FH is the monogenetic disease with the highest prevalence in human beings and it is associated with a high risk of early and serious CVD. The global prevalence of CVD in this study was 14.7%, with a mean age of 45.5 ± 16.3 years, while it is estimated that in general spanish population the prevalence in the same age range is 2.6% . The prevalence of FH is highly variable in western populations, being as high as 39% in some series . These variations have been attributed to a number of factors, such as the different diagnostic criteria (genetic or clinical) used in the FH studies, differences in the methodologies employed and the possible direct influence of environmental factors, such as diet. In fact, it has been demonstrated that consumption of a Mediterranean diet rich in olive oil reduces the incidence of CVD in the general population , even leading to a reduction in the level of activated FVII , which would also have a direct influence on subjects with FH. The phenotypic expression of FH in terms of onset and severity of atherosclerotic vascular disease varies considerably. A paucity of consistent data exist on factors that contribute to these phenotypic differences. Several studies have analyzed the influence of traditional CVD risk factors and the functional variety of LDLR mutation on this phenotypic variability [38, 39]. However, they can only partially explain the observed differences. Therefore other still unknown factors, such as genetic conditions, could play an important role in the development of CVD in these patients. This is sustained by the fact that clustering of CVD occurs in FH kindred. The genetic variability of this population sample would be determined by the presence or absence of certain polymorphisms as potential predictor of CVD risk. Also a number of studies have demonstrated that FH patients with xanthomas have a higher risk of CVD compared to those without them [40, 41]. A recent meta-analysis has demonstrated this fact concluding that the presence of tendon xanthomas is associated with a 3 times higher risk of CVD among FH patients, suggesting that xanthomas and CVD may share a common etiology . Our population had a 14.7% of global CVD prevalence, very low if we compare it with another FH cohort as Simon Broome , whose global prevalence was much higher (60%). In Simon Broome cohort, 48% of FH patients presented with tendon xanthomas; this fact could partially justify the highest prevalence of CVD when we compared it with our study where only 18.6% developed them. This low prevalence of CVD could be explained by the low presence of tendon xanthomas in our population. On the other hand we should also considered that Simon Broome cohort used clinical criteria for FH diagnosis; in our cohort genetic diagnosis of FH was carried out in all cases.
Among those potentially interesting genes of such phenotypic variability is FVII gene. Several of its polymorphisms have been associated with differences in the risk of suffering CVD events when they have been analyzed in groups of severe atherosclerosis patients [18, 19, 23, 24], basically due to variations in their levels and plasma activity, which may encourage a state of hypercoagulability [13, 16]. Our study analyzed the different types of the R353Q polymorphism of FVII gene in a sample of FH patients, comparing their potential association with CVD (coronary, cerebrovascular and peripheral artery disease). Some studies have suggested that global CVD risk appears to be independent of the R353Q polymorphism of FVII [44–46]; however, a meta-analysis has demonstrated that bearers of the Q allele are at lesser risk . Furthermore, a lower rate of myocardial infarcts has been observed in such populations [23, 24]. Several studies have described a reduction in circulating FVII levels in patients who are heterozygous (RQ) or homozygous (QQ) for the non-dominant gene thus associating these levels with the presence of the Q allele [13, 14]. One study by Girelli et al. has even suggested a possible protective effect of this allele, as a means of explaining why patients with severe coronary arteriosclerosis do not evolve acute myocardial infarct . In the face of these results, the data from our study, in which the frequency distribution of the various FVII alleles is identical to that of the general population [33, 48], do not shown any differences in terms of CVD frequency between the subjects who are homozygous for the various alleles when patients, with or without FH, are compared. Although FH patients are at high risk of CVD, they do not present differences in the frequency of CVD events as a function of being carriers, or not, of either allele. The fact that these patients present elevated levels of total cholesterol and LDLc, and lower levels of HDLc (these being factors that are independent of the development of early-onset cardiovascular phenomena), may have influenced our results, without such findings having been observed in association with allele Q. On the other hand, there was no causal relationship between the carriers of the R allele, which determines the most frequent genotype in the population, and development of CVD.
Respecting plasma FVII Ag levels our data do not shown differences in controls and FH patients and no relation could be established with the genotype and also with its allelic distribution (RR vs. RQ/QQ). These results contrast with some studies that found lower FVII levels in carriers of Q allele  and moreover no protective effect could be attributed to Q allele in our population . In the subgroup of patients affected of FH, the comparison between those with or without CVD showed no change in the adjusted mean levels of FVII depending on genotype. All these circumstances would support the absence of association between the R353Q polymorphism and CVD risk in our FH patients, according to all those studies where global CVD risk appears to be independent of the R353Q polymorphism of FVII [44–46].
We must also consider, as one of the possible reasons that could justify this lack of relation between the polymorphism and CVD, the low number of cardiovascular events developed in our FH patients (14.7%), probably because of their mean age, just 43.5 ± 16.3 with an age in the first CV event of 46.7 ± 11.1 years. Jansen et al , who investigated the contribution of polymorphisms in multiple candidate genes to CVD risk, found a 33.1% of CVD frequency in their FH cohort, where the mean age of onset of CVD was 48.2 years, although they analyzed patients with age at last visit of 56.4 ± 11.4 years.
We are unaware of any study that has associated FVII with CVD risk in FH patients and our study is thus a pioneer in this respect. It has been well demonstrated that there are variations in the concentration and activity of FVII as a function of the genotype involved, with these being lower in carriers of the Q allele. As our data have shown, therefore, the R353Q polymorphism of FVII gene does not predict cardiovascular risk in the sample of FH patients in the Spanish Cohort.
None of the authors had any conflict of interest.
This work was supported by research grants from the Centro Nacional de Investigaciones Cardiovasculares (CNIC-08-2008), National Health Institute; CIBER (CBO/6/03), Instituto de Salud Carlos III; CICYT (SAF 01/2466-C05 04 to F P-J, SAF 01/0366 to J L-M, AGL 2004-07907 to J L-M, AGL 2006-01979 to JL-M), the Spanish Ministry of Health (FIS 01/0449, FIS PI041619 to CM); Fundación Cultural "Hospital Reina Sofía-Cajasur; Consejería de Salud, Servicio Andaluz de Salud (00/212, 00/39, 01/239, 01/243, 02/64, 02/65, 02/78, 03/73, 03/75, 04/237, 04/191, 04/238, 05/396); Consejería de Educación, Plan Andaluz de Investigación, Universidad de Córdoba; Centro Excelencia Investigadora Aceite de Oliva y Salud (CEAS); NIH grants HL54776 and DK07503; Fundación Española de Hipercolesterolemia Familiar.
Heterozygous Familial Hypercholesterolemia
low-density lipoprotein receptor
- FVII Ag:
factor VII antigen
high-density lipoproteins cholesterol
low-density lipoproteins cholesterol
body mass index
Goldstein JL: Familial hypercholesterolemia. The Metabolic and Molecular Bases of Inherited Disease. Edited by: Scriver CR, Beaudet AL, Sly WS, Valle E. 2001, 2863-913. New York: McGraw-Hill
Goldstein JL, Schrott HJ, Hazzard WR, Bierman EL, Motulsky AG: Hyperlipidemia in coronary heart disease. II. Genetic analysis of lipid levels in 176 families and delineation of a new inherited disorder, combined hyperlipidemia. J Clin Invest. 1973, 52: 1544-68. 10.1172/JCI107332
Soutar AK, Naoumova RP: Mechanisms of disease: genetic causes of familial hypercholesterolemia. Nat Clin Pract Cardiovasc Med. 2007, 4: 214-25. Review, 10.1038/ncpcardio0836
Pérez-Jiménez F, Lista JD, Pérez-Martínez P, López-Segura F, Fuentes F, Cortés B, Lozano A, López-Miranda J: Olive and haemostasis: a review on its healthy effects. Public Health Nutr. 2006, 9 (8A): 1083-8. Review
Mutanen M, Freese R: Fats, lipids and blood coagulation. Curr Opin Lipidol. 2001, 12: 25-29. 10.1097/00041433-200102000-00005
Fuster V, Badimon L, Badimon JJ, Chesebro JH: Mechanisms of disease-the pathogenesis of coronary artery disease and the acute syndromes. N Engl J Med. 1992, 326: 242-50. 10.1056/NEJM199201233260406
Meade TW, Mellows S, Brozovic M, Miller GJ, Chakrabarti WR, North WR, Haineer AP, Stirling Y, Imeson JD, Thomson SG: Haemostatic function and ischaemic heart disease: principal results of the Northwick Park heart study. Lancet. 1986, 2: 533-7. 10.1016/S0140-6736(86)90111-X
Heinrich J, Balleisen L, Schulte H, Assmann G, vandeLoo J: Fibrinogen and factor VII in the prediction of coronary risk. Results from de PROCAAM study in healthy men. Arterioscler Thromb. 1994, 14: 54-9.
Campo G, Valgimigli M, Ferraresi P, Malagutti P, Baroni M, Arcozzi C, Gemmati D, Percoco G, Parrinello G, Ferrari R, Bernardi F: Tissue factor and coagulation factor VII levels during acute myocardial infarction: association with genotype and adverse events. Arterioscler Thromb Vasc Biol. 2006, 26: 2800-06. 10.1161/01.ATV.0000247249.82030.94
Karatela RA, Sainani GS: Interrelationships of factor VII activity and plasma leptin with insulin resistance in coronary heart disease. Atherosclerosis. 2010, 209: 235-40. 10.1016/j.atherosclerosis.2009.08.043
Cooper JA, Miller GJ, Bauer KA, Morrissey JH, Meade TW, Howarth DJ, Barzegar S, Mitchell JP, Rosenberg RD: Comparison of novel hemostatic factors and conventional risk factors for prediction of coronary heart disease. Circulation. 2000, 102: 2816-22.
Eriksson-Berg M, Silveira A, Orth-Gomer K, hamsten A, Schenck-Gustafsson K: Coagulation factor VII in middle-aged women with and without coronary heart disease. Thromb Haemost. 2001, 85: 787-92.
Green F, Kelleher C, Wilkes H, Temple A, Meade T, Humphries S: A common genetic polymorphism associated with lower coagulation factor VII levels in healthy individuals. Arterioscler Thromb. 1991, 11: 540-6.
Bernardi F, Arcieri P, Bertina RM, Chiarotti F, Corral J, Pinotti M, Prydz H, Samama M, Sandset PM, Strom R, García VV, Mariani G: Contribution of factor VII genotype to activated FVII levels. Differences in genotype frequencies between Northern and southern European populations. Arterioscler Thromb Vasc Biol. 1997, 17: 2548-53.
Mtiraoui N, Aboud N, Bouraoui H, Haizem S, Gris JC, Busson M, Tamim H, Almawi WY, Mahjoub T: Reduction in coagulation factor VII plasma levels by R353Q but not the -323P0/10 promoter polymorphism in healthy Tunisians. Am J Hematol. 2005, 79: 11-6. 10.1002/ajh.20328
Kathiresan S, Yang Q, Larson MG, Camargo AL, Tofler GH, Hirschhorn JN, Gabriel Sb, O'Conell CJ: Common genetic variation in five thrombosis genes and relations to plasma hemostatic protein level and cardiovascular disease risk. Thromb Vasc Biol. 2006, 26: 1405-12. 10.1161/01.ATV.0000222011.13026.25.
Bernardi F, Marchetti G, Pinotti M, Arcieri P, Baroncini C, Papacchini M, Zepponi E, Ursicino N, Chiarotti F, Mariani G: Factor VII gene polymorphisms contribution about one third of the factor VII levels variation in plasma. Arterioscler Thromb Vasc Biol. 1996, 16: 72-6.
Girelli D, Russo C, Ferraresi P, Olivieri O, Pinotti M, Friso S, Manzato F, Mazzucco A, Bernardi F, Corrocher R: Polymorphisms in the factor VII gene and the risk of myocardial infarction in patients with coronary artery disease. N Engl J Med. 2000, 343: 774-80. 10.1056/NEJM200009143431104
Lacoviello L, DiCastelnuovo A, de Knijff P, D'Orazio A, Amore C, Arboretti R, Kluft C, Benedetta Donati M: Polymorphism in the coagulation factor VII gene and the risk of myocardial infarction. N Engl J Med. 1998, 338: 79-85. 10.1056/NEJM199801083380202
Shikomata K, Kondo T, Ohno M, Takeshita K, Inden Y, Lino S, Saito H, Hirai M: Effects of coagulation Factor VII polymorphisms on the coronary artery disease in Japanese: Factor VII polymorphism and coronary disease. Thromb Res. 2002, 15: 493-8.
Geng X, Jin GD, Fu GS, Ji MA, Shann J, Wang JA: Polymorphisms in the genes for coagulation factor II, V, VII in patients undergoing coronary angiography. J Zhejiang Univ Sci. 2003, 4: 369-73. 10.1631/jzus.2003.0369
Ogawa M, Abe S, Biro S, Saigo M, Kihara T, Setoyama S, Matsuoka T, Toda H, Torii H, Atsuchi Y, Toyama Y, Tateishi S, Minagoe S, Maruyama I, Tei C: R353Q polymorphism, activated factor VII, and risk of premature myocardial infarction in Japanese men. Circ J. 2004, 68: 520-25. 10.1253/circj.68.520
Jeffery S, Poliniecki J, Leatham E, Bevan D, Ireson N, Talbot S, Cole D, Kaski JC: A protective contribution of the Q allele of the R353Q polymorphism of the factor VII gene in individuals with cronic stable angina?. Int J Cardiol. 2005, 28: 395-9. 10.1016/j.ijcard.2004.07.013.
Fujimaki T, Kato K, Yoshida T, Oguri M, Watanabe S, Metoki N, Yoshida H, Satoh K, Aoyagi Y, Nishigaki Y, Tanaka M, Nozawa Y, Kimura G, Yamada Y: Association of genetic variants with myocardial infarction in Japanese individuals with chronic kidney disease. Thromb Haemost. 2009, 101: 963-68.
Lane A, Green F, Scarabin PY, Nicaud V, Bara L, Humphries S, Evans A, Luc G, Cambou JP, Arveiler D, Cambien F: Factor VII Arg/Gln (353) polymorphism determines factor VII coagulant activity in patients with myocardial infarction (MI) and control subjects in Belfast and in France but is not a Strong indicator of MI risk in the ECTIM study. Atherosclerosis. 1996, 119: 119-27. 10.1016/0021-9150(95)05638-6
Batalla A, Alvarez R, Reguero JR, Gonzalez P, Alvarez V, Cubero GL, Cortina A, Coto E: Lack of association between polymorphisms of the coagulation factor VII and myocardial infarction in middle-aged Spanish men. Int J Cardiol. 2001, 80: 209-12. 10.1016/S0167-5273(01)00496-X
Zheng Y, Liu E, Higgins J, Keavney BD, Lowe GD, Danesh : Seven haemostatic polymorphisms in coronary disease: meta-analysis of 66155 cases and 91397 controls. Lancet. 2006, 367: 651-58. 10.1016/S0140-6736(06)68263-9
Maguire JM, Thakkinstian A, Sturm J, Levi C, Lincz L, Parsons M, Whyte S, Attia J: Polymorphisms in platelet glycoprotein 1bα and factor VII and risk of ischemic stroke: a meta-analysis. Stroke. 2008, 39: 1710-16. 10.1161/STROKEAHA.107.507228
WHO: Human Genetics Program. Familial hypercholesterolaemia, a global prospective. 1999, Ginebra: WHO
Simera I, Mother D, Hirst A, Hoey K, Schultz KF, Altman DG: Transparent and accurate reporting increases reliability and impact of your research: reporting guidelines and the EQUATOR Network. BMC Med. 2010, 26: 8-24.
Simera I, Mother D, Hoey J, Schulz KF, Altman DG: A catalogue of reporting guidelines for health research. Eur J Clin Invest. 2010, 40: 35-53. Review, 10.1111/j.1365-2362.2009.02234.x
World Health Organization Cardiovascular Diseases Unit: WHO MONICA Project: MONICA Manual. 1990, Geneva: World Health Organization
Lindman AS, Pedersen JI, Arneses H, Hjerkin EM, Veire∅d MB, Prydz H, Seljeflot I: Coagulation factor VII, R353Q polymorphism, and serum choline-containing phospholipids in males at high risk for coronary heart disease. Thromb Res. 2004, 113: 57-65. 10.1016/j.thromres.2004.02.001
Baena Díez JM, del Val García JL, Tomás Pelegrina J, Martínez Martínez JL, Martín Peñacoba R, González Tejón I, Raidó Quintana EM, Pomares Sajkiewicz M, Altés Boronat A, Alvarez Pérez B, Piñol Forcadell P, Rovira España M, Oller Colom M: Cardiovascular disease epidemiology and risk factors in primary care. Rev Esp Cardiol. 2005, 58: 367-373.
Alonso R, Mata N, Castillo S, Fuentes F, Saenz P, Muñiz O, Galiana J, Figueras R, Diaz JL, Gomez-Enterría P, Mauri M, Piedecausa M, Irigoyen L, Aguado R, Mata P, : Cardiovascular disease in familial hypercholesterolaemia: influence of low-density lipoprotein receptor mutation type and classic risk factors. Atherosclerosis. 2008, 200: 315-21. 10.1016/j.atherosclerosis.2007.12.024
López-Miranda J, Badimon L, Bonanome A: Monounsatured fat and cardiovascular risk. Nutr Rev. 2006, 64: S2-S12.
Gómez P, Fernández de la Puebla RA, Castro P, López-Miranda J, Marín C, Fuentes F, Pérez-Martínez P, Velasco F, Moreno JA, Torres A, Pérez-Jiménez F: Effect of the Mediterranean diet on casting concentrations of activated factor VII in healthy persons. Rev Esp Cardiol. 2005, 58: 285-9.
de Sauge Noltin PR, Defesche JC, Buirma RJ, Hutten BA, Lansberg PJ, Kastelein JJ: Prevalence and significance of cardiovascular risk in a large cohort of patients with familial hypercholesterolaemia. J Intern Med. 2003, 253: 161-8. 10.1046/j.1365-2796.2003.01070.x
Umans-Eckenhausen MA, Sijbrands EJ, Kastelein JJ, Defesche JC: Low-density lipoprotein receptor gene mutations and cardiovascular risk in a large genetic cascade screening population. Circulation. 2002, 106: 3031-6. 10.1161/01.CIR.0000041253.61683.08
Civeira F, Castillo S, Alonso R, Meriño-Ibarra E, Cenarro A, Artied M, Martín-Fuentes P, Ros E, Pocoví M, Mata P, : Tendon xanthomas in familial hypercholesterolemia are associated with cardiovascular risk independently of the low-density lipoprotein receptor gene mutation. Arterioscler Thromb Vasc Biol. 2005, 25: 1960-5. 10.1161/01.ATV.0000177811.14176.2b
van Aalst-Cohen ES, Jansen EC, Tanck MW, Defesche JC, Trip MD, Lansberg PJ, Stalenhoef AF, Kastelein JJ: Diagnosing familial hypercholesterolaemia: the relevance of genetic testing. Eur Heart J. 2006, 27: 2240-6. 10.1093/eurheartj/ehl113
Oosterver DM, Vermissen J, Yazdanpanah M, Defesche JC, Kastelein JJ, Sijbrands EJ: The risk of tendon xanthomas in familial hypercholesterolemia by variation in genes of the reverse cholesterol transport pathway and the low-density lipoprotein pathway. Eur Heart J. 2010, 31: 1007-12. 10.1093/eurheartj/ehp538
Humphries SE, Whittall RA, Hubbart CS, Maplebeck S, Cooper JA, Soutar AK, Naoumova R, Thompson GR, Seed M, Durrington PN, Miller JP, Betteridge DJ, Neil HA, : Genetic causes of familial hypercholesterolaemia in patients in the UK: relation to plasma lipid levels and coronary heart disease risk. J Med Genet. 2006, 43: 943-9. 10.1136/jmg.2006.038356
Feng DL, Tofler GH, Larson MG, O'Donnell CJ, Lipinska I, Schmitz C, Sutherland PA, Johnstone MT, Muller JE, D'Agostino RB, Levy D, Lindpaintner Ket: Factor VII polymorphism, factor VII levels, and prevalent cardiovascular disease-the Framingham heart study. Arterioscler Thromb Vasc Biol. 2000, 20: 593-600.
Lee AJ, Fowkes FGR, Lowe GDO, Connor Jm, Rumely A: Fibrinogen, factor VII and PAI-1 genotypes and the risk at coronary and peripheral atherosclerosis: Edinburgh artery study. Thromb Haemost. 1999, 81: 553-60.
Van der Krabben MD, Rosendaal FR, Van der Bom JG, Doggen CJ: Polymorphisms in coagulation factors and the risk of recurrent cardiovascular events in men after a first myocardial infarction. J Thromb Haemost. 2008, 6: 720-5. 10.1111/j.1538-7836.2008.02930.x
Wu AHB, Tsongalis GJ: Correlation of polymorphisms to coagulation and biochemical risk factors for cardiovascular diseases. Am J Cardiol. 2001, 87: 1361-6. 10.1016/S0002-9149(01)01553-3
Rubattu S, Di Angelantonio E, Nitsch D, Gigante B, Zanda B, Stanzione R, Evangelista A, Pirisi A, Rosati G, Volpe M: Polymorphisms in prothrombotic genes and their impact on ischemic stroke in a Sardinian population. Thromb Haemost. 2005, 93: 1095-100.
Jansen AC, van Aalst-Cohen ES, Tanck MW, Cheng S, Fontecha MR, Li J, Defesche JC, Kastelein JJ: Genetic determinants of cardiovascular risk in familial hypercholesterolemia. Arterioscler Thromb Vasc Biol. 2005, 25: 1475-81. 10.1161/01.ATV.0000168909.44877.a7
This study was performed using data obtained from the Heterozygous Familial Hypercholesterolemia Cohort Study and from the medical centers currently active in that project:
Fundación Jiménez Díaz de Madrid (Pedro Mata - Rodrigo Alonso Karlezi)
Hospital Universitario Reina Sofía de Córdoba (Francisco Fuentes Jiménez)
Hospital Universitario Virgen del Rocío, Sevilla (José Villar Ortiz - Ovidio Muñiz Grijalvo)
Hospital Ramón y Cajal, Madrid (Clotilde Vázquez Martínez -Francisco Arrieta)
Hospital de Mérida, Badajoz (Pedro Sáenz Aranzubia)
Hospital de Elche, Alicante (Mar Piedecausa-Selfa - Ana Maestre Peiró)
Hospital San Pedro de Alcántara, Cáceres ( Juan Francisco Sánchez Muñoz-Torrero)
Hospital Clínico, Barcelona (Daniel Zambón Rados)
Hospital Donostia, Donostia (Fátima Almagro Múgica)
Hospital Central, Asturias ( Pilar Gómez Enterría - Ceferino Martínez Faedo)
Hospital Ciudad Real, Ciudad Real (Jesús Galiana Gómez del Pulgar)
Hospital Nuestra Señora de la Candelaria, Tenerife (Francisca Pereyra -Mercedes Muros)
Hospital Comarcal Vega Baja, Orihuela, Alicante (José María Cepeda Rodrigo),
and with the direct support of CIBER (CB06/03), Instituto de Salud Carlos III and Centro Nacional de Investigaciones Cardiovasculares Carlos III (CNIC 08-2008; Plan Nacional de Investigación, Ministerio de Ciencia e Innovación).
Special acknowledgments to Elisa Muñoz (IMIBIC/Reina Sofía University Hospital) in the statistical analysis and interpretation.
The CIBEROBN is an initiative of the Instituto de Salud Carlos III, Madrid, Spain.
JCG: Development of study design, determination of FVII polymorphism and FVII Ag concentrations, statistical analysis and interpretation, draft manuscript. FF: Development of study design, collection data and analysis and interpretation. CCT: Determination of FVII polymorphism and FVII Ag concentrations. AGR: Collection data. AJM: Development of study design, statistical analysis. JDL: Statistical analysis. PM: Collection and data interpretation. RA: Collection and data interpretation. JLM: Development of study design, statistical analysis and interpretation. FPJ: Development of study design, statistical analysis and interpretation. All authors have read and approved the final manuscript.