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- Leinonen, E. S., et al.
(författare)
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Low-grade inflammation, endothelial activation and carotid intima-media thickness in type 2 diabetes
- 2004
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Ingår i: J Intern Med. ; 256:2, s. 119-27
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Tidskriftsartikel (refereegranskat)abstract
- OBJECTIVES: The objective of this study was to assess the relationship between inflammation, endothelial activation and incipient atherosclerosis in type 2 diabetes. DESIGN: Cross-sectional study. Setting and subjects. We studied 239 type 2 diabetic patients [71 with clinical cardiovascular disease (CVD)] and 78 healthy control subjects, aged 50-75 in a single research centre. METHODS: Carotid intima-media thickness (IMT) was determined by ultrasound. Circulating intracellular adhesion molecule-1, vascular cell adhesion molecule-1, E-selectin, ultra-sensitive C-reactive protein, human serum amyloid A, interleukin-6, monocyte colony-stimulating factor, secretory nonpancreatic phospholipase A(2) type IIA, glucose, HbA1c, and lipid/lipoprotein variables were measured. RESULTS: Carotid IMT was significantly thicker in diabetic patients than healthy controls across the whole age range. IMT was also thicker in diabetic patients with, than without, CVD, but this difference disappeared after controlling for confounding factors. Concentrations of the inflammatory and endothelial markers except IL-6 were significantly higher in the diabetic patients than in healthy controls, but comparable in diabetic patients with and without CVD. The main determinants of IMT in the diabetic patients were blood pressure, age and diabetes duration. CONCLUSIONS: Low-grade inflammation and endothelial activation are increased in diabetic patients but do not associate with IMT or clinical CVD. The inflammatory reaction seems to be rather a feature of the metabolic syndrome than a direct determinant of atherosclerosis.
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| 4. |
- Wootton, P. T., et al.
(författare)
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Tagging SNP haplotype analysis of the secretory PLA2-V gene, PLA2G5, shows strong association with LDL and oxLDL levels, suggesting functional distinction from sPLA2-IIA: results from the UDACS study
- 2007
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Ingår i: Hum Mol Genet. ; 16:12, s. 1437-44
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Tidskriftsartikel (refereegranskat)abstract
- Animal and human studies suggest that both secretory PLA2 (sPLA2)-V and sPLA2-IIA (encoded, respectively, by the neighbouring PLA2G5 and PLA2G2A genes) contribute to atherogenesis. Elevated plasma sPLA2-IIA predicts coronary heart disease (CHD) risk, but no mass assay for sPLA2-V is available. We previously reported that tagging single nucleotide polymorphism (tSNP) haplotypes of PLA2G2A are strongly associated with sPLA2-IIA mass, but not lipid levels. Here, we use tSNPs of the sPLA2-V gene to investigate the association of PLA2G5 with CHD risk markers. Seven PLA2G5 tSNPs genotypes, explaining >92% of the locus genetic variability, were determined in 519 patients with Type II diabetes (in whom PLA2G2A tSNP data was available), and defined seven common haplotypes (frequencies >5%). PLA2G5 and PLA2G2A tSNPs showed linkage disequilibrium (LD). Compared to the common PLA2G5 haplotype, H1 (frequency 34.9%), haplotypes H2-7 were associated with overall higher plasma LDL (P < 0.00004) and total cholesterol (P < 0.00003) levels yet lower oxLDL/LDL (P = 0.006) and sPLA2-IIA mass (P = 0.04), probably reflecting LD with PLA2G2A. Intronic tSNP (rs11573248), unlikely itself to be functional, distinguished H1 from LDL-raising haplotypes and may mark a functional site. In conclusion, PLA2G5 tSNP haplotypes demonstrate an association with total and LDL cholesterol and oxLDL/LDL, not seen with PLA2G2A, thus confirming distinct functional roles for these two sPLA2s.
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| 5. |
- Wootton, P. T., et al.
(författare)
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Tagging-SNP haplotype analysis of the secretory PLA2IIa gene PLA2G2A shows strong association with serum levels of sPLA2IIa: results from the UDACS study
- 2006
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Ingår i: Hum Mol Genet. ; 15:2, s. 355-61
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Tidskriftsartikel (refereegranskat)abstract
- Recent prospective analysis identified secretory phospholipase A(2)-IIa (sPLA(2)IIa) as a coronary artery disease (CAD) risk predictor. This study aimed to examine the relationship between serum levels of sPLA(2)IIa and variation in the sPLA(2)IIa gene (PLA2G2A) in a cohort of patients with Type II diabetes (T2D) mellitus. Six tagging single nucleotide polymorphisms (tSNPs) accounting for > 92% of the genetic variability in PLA2G2A were identified and distinguished six common haplotypes (frequencies > 5%). In the 523 Caucasian T2D patients, levels of sPLA(2)IIa, independent of CRP, were negatively correlated with total antioxidant status (P = 0.003) and high-density lipoprotein cholesterol (P = 0.006) in men and correlated with CAD status in women (P = 0.002) (Odds ratio of top two tertiles versus bottom = 2.50) [95% CI (1.13-5.53) P = 0.024]. Overall, tSNP haplotypes showed a highly significant association with sPLA(2)IIa levels (P < 0.0001), explaining 6.3% of the variance. The most common haplotype (frequency 14.2%) was associated with 53% higher sPLA(2)IIa levels [3.25 ng/ml (+/- 0.14)] compared with the combined other haplotypes [2.13 ng/ml (+/- 0.09), P < 0.00001]. Five of the six tSNPs were associated with significant effects on sPLA(2)IIa levels but the raising haplotype could not be distinguished by a single tSNP and none are likely to be functional. These data confirm the relationship between elevated sPLA(2)IIa levels and CAD risk reported in both cases: control and prospective analyses. The strong impact of PLA2G2A haplotypic variation on sPLA(2)IIa levels will help clarify the causality of this association.
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