A561C polymorphism of E-selectin is associated with ischemic cerebrovascular disease in the Japanese population without diabetes mellitus and hypercholesterolemia

Association of E-Selectin gene rs5361 polymorphism with ischemic stroke susceptibility: a systematic review and Meta-analysis

BACKGROUND

Over the years, a number of published studies showed that E-Selectin gene rs5361 (S128R, Ser128Arg, A561C) variants were associated with the risk of ischemic stroke (IS). However, the results of those case-control studies were still equivocal. Therefore, we performed this meta-analysis to clarify the relationship between E-Selectin gene rs5361 polymorphism and IS risk.

METHODS

We searched the Web of Science, PubMed, VIP, CNKI (China National Knowledge Infrastructure) and Wanfang databases for obtainning the eligible studies according to the inclusion and exclusion criteria. Odds ratios (ORs) with its 95% confidence intervals (CIs) were calculated to evaluate the relationship of E-Selectin gene rs5361 polymorphism with IS susceptibility under the dominant and allelic model with fixed or random effects model.

RESULTS

Totally, 13 studies with 2888 cases and 2976 controls were selected in this systematic review and meta-analysis This meta-analysis obtained that E-Selectin gene rs5361variants contributed to increase the risk of IS (C vs. A: OR = 2.23, 95%CI = 1.70-2.92, p < 0.001). We also performed a sub-analysis by ethnicity, the results indicated that rs5361 variants were related to an increased risk of IS (East Asian population: C vs. A: OR = 1.97, 95%CI =1.58-2.45, p < 0.001; African population: C vs. A: OR = 5.52, 95%CI = 3.48-8.76, p < 0.001; Caucasian population: C vs. A: OR =1.67, 95%CI =1.32-2.10, p < 0.001).

CONCLUSIONS

Therefore, our meta-analysis suggested that C allele, AA and AC genotypes of E-Selectin gene rs5361 variants were related to an increased risk of IS in overall populations.

Cotreatment with the α-glucosidase inhibitor miglitol and DPP-4 inhibitor sitagliptin improves glycemic control and reduces the expressions of CVD risk factors in type 2 diabetic Japanese patients

OBJECTIVE

In this study, we examined whether inhibition of postprandial hyperglycemia by combination therapy with two drugs for reducing postprandial hyperglycemia, i.e., α-glucosidase inhibitor miglitol and dipeptidyl peptidase (DPP)-4 inhibitor sitagliptin, improves glycemic control and reduces the risk of cardiovascular disease (CVD) development.

MATERIALS/METHODS

We enrolled 32 type 2 diabetic Japanese patients with hemoglobin A1c (HbA1c) levels ranging from 6.9% to 10.5%, who had been treated for at least 2 months with 50mg miglitol (t.i.d.) or 50 mg sitagliptin (q.d.). Following a monotherapy period with either miglitol (Group-M) or sitagliptin (Group-S) for 1 month, the patients were subjected to combination therapy with sitagliptin and miglitol for 3 months. Meal tolerance tests were performed at the end of the monotherapy and combination therapy.

RESULTS

Combination therapy for 3 months after monotherapy reduced HbA1c (changes: Group-M: -1.3%±0.7%, P<0.001; Group-S: -0.6%±0.5%, P<0.001) and glycoalbumin levels and increased 1,5-anhydroglucitol concentrations in the blood. In the meal tolerance tests, circulating active glucagon-like peptide-1 levels were elevated in both groups, while active glucose-dependent insulinotropic polypeptide levels were reduced by combination therapy in the group with add-on miglitol therapy. The plasma protein concentrations of interleukin (IL)-8 and adhesion molecules (sE-selectin and sVCAM-1) were reduced by switching to the combination therapy, in particular with the add-on miglitol therapy.

CONCLUSIONS

Our results suggest that combination therapy with miglitol and sitagliptin improves glycemic control and reduces the circulating protein concentrations of IL-8, sE-selectin, and sVCAM-1 in type 2 diabetic Japanese patients.

Genetic variations in E-selectin and ICAM-1: relation to atherosclerosis

Background

This study aimed to investigate the association of both intercellular adhesion molecule-1 (ICAM-1) and endothelial cell adhesion molecule (E-selectin) polymorphisms using PCR technique and their role in the pathogenesis of atherosclerosis.

Material/Methods

The study enrolled 285 individuals, classified into 4 groups: 63 cerebrovascular atherosclerotic patients, 75 cardiovascular patients, 72 peripheral atherosclerotic patients and 75 normal healthy individuals.

Results

The frequency of the mutant AC genotype of E-selectin in peripheral, cerebral and cardiovascular atherosclerotic patients was significantly higher than in control subjects (29.17%, 28.53% and 28% vs. 8%, respectively). However, no significant difference was observed in the frequency of mutant CC allele between all atherosclerotic patients and control groups. The frequency of the mutant EE homozygotes of ICAM-1 in peripheral, cerebral and cardiovascular atherosclerotic patients was significantly higher compared to controls (45.8%, 42.9% and 36% vs. 12%, respectively). The frequency of EK of ICAM-1 showed no significant difference between atherosclerotic patients and the control group. The frequency of the mutant E allele of ICAM-1 was significantly higher in peripheral, cerebral and cardiovascular patients compared to controls (58.3%, 54.8% and 54% vs. 26%, respectively).

Conclusions

Ser 128Arg of E-selectin and the K469E of ICAM-1 polymorphisms may be involved in predisposition to atherosclerosis.

Low frequency haplotypes of E-selectin polymorphisms G2692A and C1901T give increased protection from coronary artery disease

Background

E-selectin polymorphisms are an independent atherosclerosis and coronary artery disease (CAD) risk factor. This study aimed to investigate the link between the C1901T and G2692A E-selectin tagging SNPs and their haplotypes and the extent of coronary artery disease in Polish patients.

Material/Methods

For this study 321 patients were recruited CAD extent by coronary angiography and E selectin gene variant were investigated using HapMap, PCR/RFLP, multivariate logistic regression and haplotype analysis.

Results

Frequency distributions of the C1901T and G2692A polymorphisms were significantly different in CAD patients as compared to control subjects (p=0.037 and p=0.025, respectively). The C1901T polymorphism was found to be an independent genetic predictor of risk of CAD (OR=3.01) in a multivariate model adjusted for classic, environmental risk factors. The A-C and G-T haplotypes showed the strongest significant associations with CAD. The A-C haplotype proved to be significantly more common in controls (haplotype frequency 9.2%) than in CAD (5.7%, p=0.048); the G-T haplotype was not found among control subjects (0.0%) but was found in CAD (1.3%, p=0.0099).

Conclusions

Associations between the C1901T and G2692A E-selectin polymorphisms and CAD in the Polish population were found. Investigated variants correlated with the risk of coronary artery disease development but not with the extent of coronary artery vascular changes. In the haplotype analysis, 2 haplotypes influenced CAD – the A-C haplotype (7%) proved to exert a protective effect against CAD, while the effect of the less frequent G-T haplotype (1%) was associated with significant increase in CAD risk.

Association analysis of the E-selectin 98G > T polymorphism and the risk of childhood ischemic stroke

Genes related to platelet and arterial endothelial function have been recently considered as independent risk factors for stroke. We aimed to analyze a relationship between the E-selectin 98G > T polymorphism and stroke in children and to observe the transmission of E-selectin alleles from heterozygous parents to their affected children. We studied 59 children after stroke, 112 parents, and 87 healthy children. The E-selectin 98G > T polymorphism was analyzed with the polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) method. The frequency of the 98T allele in patients was almost twofold lower than in controls (5.1% vs. 9.8%, p = 0.145, odds ratios (OR) = 0.49) as well as carriers of the 98T allele (19.5% in controls vs. 8.5% in cases, p = 0.067, OR = 0.38). The G allele of the E-selectin 98G > T polymorphism was more frequently transmitted to the children after stroke compared to the T allele (68% vs. 32%). In conclusion, we did not confirm the relationship between the 98G > T polymorphism of the E-selectin gene and childhood ischemic stroke. There is still a need for further studies.

Analysis of E-Selectin S128R gene polymorphism in pancreatic cancer

BACKGROUND

E-selectin, an intercellular adhesion molecule that plays important roles in metastasis of tumor cells, has a polymorphism in exon 4 that results in the substitution of a serine by an arginine within the extracellular domain of the receptor, which increases its affinity for ligands. No evidence exist on the role of E-selectin polymorphism in pancreatic cancer.

METHODS

Eighty pancreatic cancer patients and 160 cases of normal healthy control subjects were investigated for genotype and allelic frequencies of S128R polymorphism of E-selectin gene by PCR-RFLPs.

RESULTS

The frequencies for "AA," "CA," and "CC" genotypes were 46.25%, 50%, and 3.75% in patients, and 63.75%, 26.9%, and 9.4% in healthy subjects, respectively. The "C" carriers group of patients ("CA + CC" genotype) and the "C" allele were over-represented among the pancreatic cancer cases (P = 0.012 and 0.096, respectively). Advanced T stage, the presence of lymph node and other adverse pathologic characteristics were not significantly correlated with either the "CA + CC" genotype group of patients or the presence of "C" allele.

CONCLUSIONS

E-selectin S128R "C" allele may confer an increased susceptibility to pancreatic cancer development, while its carriage status does not appear to be related to the aggressive features of this malignancy.

Role of ICAM-1 and E-selectin gene polymorphisms in pathogenesis of PAOD in Egyptian patients

Background:

Intercellular adhesion molecule-1 (ICAM-1) and E-selectin have been shown to predict cardiovascular disease (CVD) such as myocardial infarction, stroke, and peripheral arterial occlusive disease (PAOD).

Methods:

Two mutations, S128R in E-selectin and K469E in ICAM-1, were investigated in 156 patients with PAOD and 100 control subjects using polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) analysis in an Egyptian population.

Results:

The distribution of E-selectin genotypes in patients affected by PAOD was 84.6% for the AA genotype and 15.4% for the AC genotype. In the control arm the distribution was 97% for the AA genotype and 3% for the AC genotype. There was a statistically significance difference in the distribution of the AC genotype in PAOD patients when compared with the control subjects. Additionally, the distribution of ICAM-1 genotypes in patients affected by PAOD was 30.8% with the EE, 48% with the EK, and 21.2% with the KK genotypes. The distribution of ICAM-1 genotypes in control subjects was 13% EE, 33% EK and 54% KK. The EE genotype was significantly more common in PAOD patients than in the controls.

Conclusion:

S128R and K469E polymorphisms were associated with increased risk in PAOD. Early detection of these polymorphic genes helps in early prophylaxis against PAOD.

Polymorphisms and plasma soluble levels of E-selectin in patients with chronic hepatitis B virus infection

BACKGROUND

Infections with hepatitis B virus (HBV) may lead to a distinct clinical outcome which is partially related to host genetic variability. Our aim was to investigate the relationships between the polymorphisms of the E-selectin gene and disease progression in a HBV-infected Chinese Han population, and also to determine the plasma soluble E-selectin (sE-selectin) levels in this population.

METHODS

Genomic DNA was extracted from the peripheral blood of 367 HBV carriers and 281 healthy controls. Two polymorphisms (PstI for A561C and HphI for G98T) of the E-selectin gene were analyzed by polymerase chain reaction-restriction fragment length polymorphism. Circulating sE-selectin levels were measured by specific enzyme-linked immunosorbent assay (ELISA).

RESULTS

The frequency of the C allele (AC or CC) of the A561C polymorphism was significantly higher in patients with liver cirrhosis (LC) compared to controls (p=0.002). There was no difference in allele distribution of the G98T polymorphism. But in patients with LC, classified according to the Child-Pugh classification, the frequency of the T carrier (GT and TT) was significantly different between Child-Pugh class A and class B plus C (p=0.009). Levels of plasma soluble E-selectin (sE-selectin) were significantly increased in HBV carriers with chronic hepatitis (CH) and LC (mean+/-SD 68.94+/-34.09 and 43.39+/-18.00 ng/mL) compared to controls (13.96+/-7.50 ng/mL) (p<0.01). In the LC subgroup, levels of sE-selectin were significantly decreased from Child-Pugh class A to class C (p<0.05). In each group, individuals with the C allele showed higher sE-selectin levels than those with the A allele (p<0.05).

CONCLUSIONS

This is the first report describing the association between E-selectin polymorphisms and HBV-related chronic liver diseases. Our data suggest that the A561C polymorphism of the E-selectin gene may be associated with disease progression in patients with chronic HBV infection and control the expression of plasma soluble levels, while the G98T polymorphism may be related to fibrotic severity in the Chinese population.

A561C and G98T polymorphisms and plasma soluble levels of E-selectin in patients with chronic HBV infection

AIM: To investigate the association between A561C polymorphism in the exon 2 and the G98T polymorphism in the exon 4 of E-selectin gene and disease progression in a HBV-infected Chinese Han population, and also to determine the plasma soluble E-selectin levels in these people.

METHODS: Polymorphisms (Pst I for A561C and Hph I for G98T) of E-selectin gene were analyzed using polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) in 367 HBV carriers and 281 healthy controls. The plasma soluble E-selectin levels were measured using specific enzyme-linked immunosorbent assay (ELISA).

RESULTS: There was significant difference in frequencies of A/C+C/C genotype and C allele in E-selectin A561C polymorphism between patients with liver cirrhosis (LC) and controls (P = 0.006 and P = 0.002). The relative risk of LC with A/C+C/C genotype was 2.45 times of those with A/A genotype (OR = 2.45, 95%CI: 1.28-4.72). There was no difference in genotype and allele distribution for E-selectin G98T polymorphism between each group and controls. But in patients with LC, the frequency of G/T+T/T genotype was of significant difference between Child' class A and class B plus C after the Child-Pugh classification (P = 0.034), the relative risk of Child-pugh B or C with G/T+T/T genotype was 3.07 times of those with G/G genotype (OR = 3.07, 95%CI: 1.05-8.97). Plasma levels of soluble E-selectin were significantly increased in HBV carriers with chronic hepatitis (CH) and LC compared with controls (P < 0.01). In the subgroup of LC, levels of soluble E-selectin were significantly decreased from Child' class A to class C (P < 0.05). In each group, people with C allele showed higher soluble E-selectin levels than those with A allele (P < 0.05).

CONCLUSION: E-selectin A561C polymorphism may be associated with liver cirrhosis in patients with chronic HBV infection and affect the plasma soluble levels, and the G98T polymorphism may be related to fibrotic severity.

Role of S128R polymorphism of E-selectin in colon metastasis formation

The extravasation of cancer cells is a key step of the metastatic cascade. Polymorphisms in genes encoding adhesion molecules can facilitate metastasis by increasing the strength of interaction between tumor and endothelial cells as well as impacting other properties of cancer cells. We investigated the Ser128Arg (a561c at the nucleotide level) polymorphism in the E-selectin gene in patients with metastatic colon cancer and its functional significance. Genotyping for a561c polymorphism was performed on 172 cancer patients and on an age-matched control population. The colon cancer group was divided into groups with (M(+)) and without observable metastasis (M(-)). For in vitro functional assays, Huvec transfected cells expressing wild-type (WT) or the S128R variant of E-selectin were established to study in vitro binding ability and signal transduction processes of T84 colon cancer cell line. Our results demonstrated that the Arginine(128) allele was more prevalent in the M(+) group than in the M(-) group or normal controls (p < 0.005; odds ratio, 1.56; 95% confidence interval (CI) 1.16-1.92; p < 0.001, odds ratio = 1.65; CI = 1.24-1.99, respectively). In vitro, S128R E-selectin transfected Huvec cells, supported increased adhesion as well as increased cellular signaling of T84 cancer cells compared to WT E-selectin and mock-transfected Huvec cells. These findings suggest that the E-selectin S128R polymorphism can functionally affect tumor-endothelial interactions as well as motility and signaling properties of neoplastic cells that may modulate the metastatic phenotype.