Key result
Prior aspirin use in unstable angina patients (n=32) was associated with reduced plasma IL-6 and ICAM-1 and higher eNOS protein expression compared to those not taking aspirin (n=18).
Why the study?
Does prior aspirin use reduce systemic inflammatory markers and modify eNOS expression in patients with unstable angina?
Observational (n=70)
Does prior aspirin use reduce systemic inflammatory markers and modify eNOS expression in patients with unstable angina?
Prior aspirin use in patients with unstable angina is associated with a blunted systemic inflammatory response and increased eNOS expression, suggesting potential pleiotropic cardioprotective mechanisms.
Should not change aspirin use in unstable angina; hypothesis-generating for pleiotropic effects and needs prospective validation.
BACKGROUND: Prior use of aspirin in patients with acute coronary syndrome has been associated with a lower incidence of acute myocardial infarction. The aim of this study was to explore if prior aspirin therapy in unstable angina (UA) patients could modify systemic inflammatory markers such as interleukin-6 (IL-6), tumour necrosis factor-alpha (TNF-alpha) and intercellular adhesion molecule-1 (ICAM-1) and the expression of endothelial nitric oxide synthase (eNOS) in neutrophils. MATERIALS AND METHODS: Unstable angina was defined as transient S-T segment changes without significant increases in CK and CK-MB. We studied 50 consecutive patients admitted to hospital within 24 h after the onset of chest pain. The number of patients with prior aspirin was significantly higher (n = 32) than those not taking aspirin (n = 18) on admission. RESULTS: Plasma levels of IL-6 and ICAM-1 were significantly increased in the UA patients when compared with the healthy control volunteers (n = 20) used as a reference for normal values. Plasma levels of both IL-6 and ICAM-1 were reduced in patients taking aspirin. There were no differences in the plasma levels of TNF-alpha between the UA patients and the control volunteers. The eNOS protein expression was also higher in neutrophils from the UA patients taking aspirin than in those not taking aspirin. CONCLUSION: Patients taking aspirin before UA showed a lower systemic inflammatory response and higher eNOS protein expression in their neutrophils
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Mateos‐Cáreres et al. (2002) conducted an observational in Unstable angina (n=70). Prior aspirin use vs. No prior aspirin use was evaluated on Plasma levels of systemic inflammatory markers (IL-6, TNF-alpha, ICAM-1) and eNOS protein expression in neutrophils. Prior aspirin use in unstable angina patients (n=32) was associated with reduced plasma IL-6 and ICAM-1 and higher eNOS protein expression compared to those not taking aspirin (n=18).
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