TY - JOUR
T1 - Effects of Aspirin on Intra-Platelet Vascular Endothelial Growth Factor, Angiopoietin-1, and P-Selectin Levels in Hypertensive Patients
AU - Nadar, Sunil
AU - Blann, Andrew D.
AU - Lip, Gregory Y.H.
N1 - Funding Information:
This work was supported by the Peel Medical Research Trust and the Sandwell and West Birmingham Hospitals NHS Trust Research and Development programme for the Haemostasis Thrombosis and Vascular Biology Unit.
PY - 2006/9
Y1 - 2006/9
N2 - Background: Although aspirin is useful in reducing platelet activation and cardiovascular events, its effects on platelet levels of angiogenic factors, such as vascular endothelial growth factor (VEGF) and angiopoietin-1 (Ang-1), and markers of platelet activation in hypertension are unknown. The aim of this study was to study the effects of aspirin on the platelet morphology, plasma and platelet levels of VEGF (sVEGF and pVEGF respectively), Ang-1 (sAng-1 and pAng-1 respectively), and P-selectin (sPsel and pPsel respectively) in patients with well controlled hypertension. Methods: A total of 35 aspirin-naive, hypertensive patients (29 male and six female; mean age 64 years) were compared with 30 (23 male, seven female, mean age 59 years) normotensive control subjects. Blood was collected for plasma VEGF, P-selectin, and Ang-1 (enzyme-linked immunoassay), intra-platelet levels of VEGF, Ang-1, and P-selectin, and platelet volume and mass. Research indices in hypertensive patients were studied before and after 3 months treatment with aspirin 75 mg daily. Results: Hypertensive patients had significantly higher plasma levels of VEGF (P = .04), Ang-1 (P < .001), as well as pVEGF (P = .008), pAng-1(P = .001), sPsel (P = .02), pPsel (P < .001), and mean platelet mass (P = .01) when compared with control subjects. After treatment with aspirin for 3 months, there were significant reductions in plasma VEGF (P = .01), pAng-1 (P = .04), sPsel (P = .001), and pPsel (P < .001) levels, but not levels of platelet VEGF and plasma Ang-1. Neither pVEGF nor pAng-1 correlated with blood pressure or with their respective plasma levels. Conclusions: The use of aspirin in high-risk hypertensive patients leads to a reduction in intra-platelet angiogenic growth factors and platelet activation. This may have implications for the use of aspirin in conditions (such as vascular disease) that have been associated with an increase in angiogenesis and platelet activation.
AB - Background: Although aspirin is useful in reducing platelet activation and cardiovascular events, its effects on platelet levels of angiogenic factors, such as vascular endothelial growth factor (VEGF) and angiopoietin-1 (Ang-1), and markers of platelet activation in hypertension are unknown. The aim of this study was to study the effects of aspirin on the platelet morphology, plasma and platelet levels of VEGF (sVEGF and pVEGF respectively), Ang-1 (sAng-1 and pAng-1 respectively), and P-selectin (sPsel and pPsel respectively) in patients with well controlled hypertension. Methods: A total of 35 aspirin-naive, hypertensive patients (29 male and six female; mean age 64 years) were compared with 30 (23 male, seven female, mean age 59 years) normotensive control subjects. Blood was collected for plasma VEGF, P-selectin, and Ang-1 (enzyme-linked immunoassay), intra-platelet levels of VEGF, Ang-1, and P-selectin, and platelet volume and mass. Research indices in hypertensive patients were studied before and after 3 months treatment with aspirin 75 mg daily. Results: Hypertensive patients had significantly higher plasma levels of VEGF (P = .04), Ang-1 (P < .001), as well as pVEGF (P = .008), pAng-1(P = .001), sPsel (P = .02), pPsel (P < .001), and mean platelet mass (P = .01) when compared with control subjects. After treatment with aspirin for 3 months, there were significant reductions in plasma VEGF (P = .01), pAng-1 (P = .04), sPsel (P = .001), and pPsel (P < .001) levels, but not levels of platelet VEGF and plasma Ang-1. Neither pVEGF nor pAng-1 correlated with blood pressure or with their respective plasma levels. Conclusions: The use of aspirin in high-risk hypertensive patients leads to a reduction in intra-platelet angiogenic growth factors and platelet activation. This may have implications for the use of aspirin in conditions (such as vascular disease) that have been associated with an increase in angiogenesis and platelet activation.
KW - Hypertension
KW - P-selectin
KW - angiopoeitin-1
KW - aspirin
KW - platelets
KW - vascular endothelial growth factor
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U2 - 10.1016/j.amjhyper.2006.03.001
DO - 10.1016/j.amjhyper.2006.03.001
M3 - Article
C2 - 16942942
AN - SCOPUS:33846238204
SN - 0895-7061
VL - 19
SP - 970
EP - 977
JO - American Journal of Hypertension
JF - American Journal of Hypertension
IS - 9
ER -