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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

Wootton, PTE; Arora, NL; Drenos, F; Thompson, SR; Cooper, JA; Stephens, JW; ... Talmud, PJ; + view all (2007) 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. Human Molecular Genetics , 16 (12) 1437 - 1444.

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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 11 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 oxLD/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, PLA2G5tSNP 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

Type:Article
Title: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
Additional information:WoS ID: 000248084900005 Times Cited: 8ArticleEnglishTalmud, P. JRoyal Free & Univ Coll Med Sch, Dept Med, Div Cardiovasc Genet, 5 Univ St, London WC1E 6JF, EnglandCited References Count: 37190UAGREAT CLARENDON ST, OXFORD OX2 6DP, ENGLANDOXFORD
Keywords:LOW-DENSITY LIPOPROTEINS, CORONARY-ARTERY-DISEASE, II PHOSPHOLIPASE A(2), GROUP-V, MYOCARDIAL-INFARCTION, INCREASED AFFINITY, PLASMA-LEVELS, SERUM-LEVELS, HEALTHY-MEN, ATHEROSCLEROSIS
UCL classification:UCL > School of Life and Medical Sciences > Faculty of Population Health Sciences > Institute of Cardiovascular Science

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