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  • Title: Ethnic/racial differences in circulating markers of angiogenesis and their association with cardiovascular risk factors and cardiovascular disease.
    Author: Bennett PC, Gill PS, Silverman S, Blann AD, Balakrishnan B, Lip GY.
    Journal: Int J Cardiol; 2013 Aug 20; 167(4):1247-50. PubMed ID: 22494858.
    Abstract:
    OBJECTIVE: To determine (a) whether ethnic/racial differences exist in circulating markers of angiogenesis (Angiopoietin-1 (Ang-1), Angiopoietin-2 (Ang-2), soluble Tie-2 receptor (sTie-2) and Angiogenin) between South Asian (SA; from India, Pakistan and Bangladesh); Black African-Caribbean and White (W) ethnic groups, and (b) associations between these markers in stable cardiovascular disease (CVD) and its risk factors. PATIENTS AND METHODS: We recruited 243 subjects (82 SA, 84 Black and 77 W) with symptomatic and clinically confirmed CVD (n=108), risk factor controls (with ≥ 1 cardiovascular risk factor, e.g. smoking, diabetes mellitus, dyslipidaemia, hypertension) and with ankle brachial pressure index >1) (n=64) and healthy controls free of CVD and risk factors (n=56). Angiogenic markers were measured by enzyme linked immunoassay. RESULTS: In healthy controls, angiogenin was higher in SA and Black subjects, compared to Whites (p<0.05). sTie-2 correlated inversely with angiogenin (p=0.001), was higher in women (p=0.029) and was lower in smokers (p=0.007). Overall, age (p=0.001) was the only independent factor associated with angiopoietin-1. Angiogenin (p=0.01) and SBP (p=0.014) were both independently higher in the Black group compared to the White group. CONCLUSIONS: Ethnic, racial, and demographic differences are evident in certain circulating markers of angiogenesis. With the exception of an effect of smoking on sTie-2, these differences are not influenced by the presence of other risk factors, nor the presence of stable cardiovascular disease.
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