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Thrombospondin-4 polymorphism (A387P) predicts cardiovascular risk in postinfarction patients with high HDL cholesterol and C-reactive protein levels.

Corsetti J.P., Ryan D., Moss A.J., McCarthy J., Goldenberg I., Zareba W., Sparks C.E.

Few studies are available in human populations investigating involvement of vascular inflammation and oxidative stress-related dysfunctional transformation of high-density lipoprotein (HDL) in establishing cardiovascular disease (CVD) risk. To this end, the current work investigated a subgroup of post-infarction patients at high-risk for recurrent events defined by high levels of HDL cholesterol (HDL-C) and concurrently high levels of C-reactive protein (CRP). Thrombospondin-4 (TSP-4), a matricellular protein of vessel walls associated with inflammation, was investigated in terms of CVD risk using multivariable modelling with a well-characterised functional genetic polymorphism of THBS4 (A387P, rs1866389) along with previously demonstrated risk-related functional genetic polymorphisms of CYBA (C242T, rs4673) and CETP (TaqIB, rs708272), and a set of blood markers. Results revealed risk-association for the gain-of-function P-allele of the THBS4 polymorphism (hazard ratio 2.00, 95% confidence interval 1.10-3.65, p=0.024). Additionally, von Willebrand factor was associated with D-dimer levels in the higher-risk P allele patients suggestive of a connection between endothelial dysfunction and thrombogenesis. In conclusion, TSP-4, a matricellular protein involved in regulating vascular inflammation, plays a role in establishing recurrent coronary risk in post-infarction patients with high levels of HDL-C and CRP. Further studies should focus on additional effects of vascular inflammatory processes on anti-atherogenic functionality of HDL particles.

Thromb. Haemost. 106:1170-1178(2011) [PubMed] [Europe PMC]

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