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• W2000731251 abstract "Chronic heart failure (CHF) is characterized by the activation of neurohormones and cytokines. Strenuous exercise causes activation of both systems but the effect of acute bouts of exercise on cytokines is not known in patients with CHF. This study determined whether maximal exercise induces activation of cytokines in CHF. Plasma interleukin-6 (IL-6), tumor necrosis factor (TNF)-alpha, epinephrine, norepinephrine, and atrial and brain natriuretic peptides (ANP and BNP) were determined before and after symptom-limited cardiopulmonary exercise testing in 80 patients with CHF (LVEF=38+/-1%, peak VO(2)=18.8+/-0.5 ml/min/kg) and age-matched 33 controls. Resting IL-6 (Controls vs. CHF: 1.3+/-0.2 vs. 2.5+/-0.3 pg/ml, P<0.001) and TNF-alpha (2.7+/-0.2 vs. 3.8+/-0.2 pg/ml, P<0.01) were elevated in CHF. LogIL-6 and logTNF-alpha were positively correlated (r=0.34 and r=0.35, respectively) with logplasma norepinephrine, and were negatively correlated (r=-0.39 and r=-0.32, respectively) with peak VO(2). Maximal exercise increased IL-6 and TNF-alpha both in controls and CHF (all P<0.01). Changes in IL-6 (DeltaIL-6) correlated with Deltaepinephrine (r=0.63, P<0.0001) and Deltanorepinephrine (r=0.57, P=0.0006) in controls, but not in CHF. DeltaTNF-alpha correlated with DeltaANP (r=0.28, P=0.01) only in CHF. In summary, cytokine activation at rest was associated with high plasma norepinephrine and exercise intolerance. Maximal exercise caused increases in IL-6 and TNF-alpha concentrations. Sympathetic activation seems to be important for the IL-6 increase during exercise in controls. In CHF, changes in ANP during exercise were associated with the exercise-induced increase in TNF-alpha, but still unknown mechanisms are involved for the cytokine activation during exercise." @default.
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• W2000731251 date "2003-01-01" @default.
• W2000731251 modified "2023-09-23" @default.
• W2000731251 title "Interleukin-6 and tumor necrosis factor-α levels increase in response to maximal exercise in patients with chronic heart failure" @default.
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• W2000731251 doi "https://doi.org/10.1016/s0167-5273(02)00200-0" @default.
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