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JOURNAL ARTICLE
RESEARCH SUPPORT, NON-U.S. GOV'T
IL-6 and IL-1 receptor antagonist in stable angina pectoris and relation of IL-6 to clinical findings in acute myocardial infarction.
Journal of Internal Medicine 2000 July
OBJECTIVES: To determine if increased inflammatory activity, as reflected by interleukin-6 (IL-6) and interleukin-1 receptor antagonist (IL-1ra) levels, is present in patients with stable angina pectoris and if IL-6 levels on admission to the coronary care unit in patients with acute myocardial infarction (AMI) are related to heart failure and fever response.
SUBJECTS AND METHODS: We studied 28 patients with stable angina pectoris enrolled for coronary angiography, and compared them with sex- and age-matched controls. Thirty-four patients with AMI were studied and samples for determination of IL-6 levels were taken on admission within 36 h of onset of symptoms. IL-6 and IL-1ra were determined in serum by enzyme immunoassay.
RESULTS: Levels of IL-6 and IL-1ra were higher in patients with stable angina pectoris than in controls (mean 4.6 +/- 3.6 vs. 3.0 +/- 2.9 ng L-1, P < 0.03, and 774 +/- 509 vs. 490 +/- 511 ng L-1, P < 0.01, respectively). IL-6 and IL-1ra levels were not related to angiographic findings. IL-6 levels were high in patients with AMI (38.9 +/- 75.6 ng L-1). Patients with prolonged fever (duration > 4 days) had higher IL-6 levels (94.7 +/- 138.2 vs. 21.7 +/- 29.7 ng L-1, P < 0.05). IL-6 levels were not related to heart failure.
CONCLUSIONS: Our results indicate that increased inflammatory activity is present not only in acute coronary syndromes, but also in a chronic form of ischaemic heart disease, giving further evidence for a central role of inflammatory processes in coronary artery disease. With regard to AMI, we found increased inflammatory activity in patients with prolonged fever.
SUBJECTS AND METHODS: We studied 28 patients with stable angina pectoris enrolled for coronary angiography, and compared them with sex- and age-matched controls. Thirty-four patients with AMI were studied and samples for determination of IL-6 levels were taken on admission within 36 h of onset of symptoms. IL-6 and IL-1ra were determined in serum by enzyme immunoassay.
RESULTS: Levels of IL-6 and IL-1ra were higher in patients with stable angina pectoris than in controls (mean 4.6 +/- 3.6 vs. 3.0 +/- 2.9 ng L-1, P < 0.03, and 774 +/- 509 vs. 490 +/- 511 ng L-1, P < 0.01, respectively). IL-6 and IL-1ra levels were not related to angiographic findings. IL-6 levels were high in patients with AMI (38.9 +/- 75.6 ng L-1). Patients with prolonged fever (duration > 4 days) had higher IL-6 levels (94.7 +/- 138.2 vs. 21.7 +/- 29.7 ng L-1, P < 0.05). IL-6 levels were not related to heart failure.
CONCLUSIONS: Our results indicate that increased inflammatory activity is present not only in acute coronary syndromes, but also in a chronic form of ischaemic heart disease, giving further evidence for a central role of inflammatory processes in coronary artery disease. With regard to AMI, we found increased inflammatory activity in patients with prolonged fever.
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