alexa Systemic cytokines, clinical and physiological changes in patients hospitalized for exacerbation of COPD.
Pulmonology

Pulmonology

Journal of Pulmonary & Respiratory Medicine

Author(s): PintoPlata VM, Livnat G, Girish M, Cabral H, Masdin P,

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Abstract BACKGROUND: Systemic inflammation in patients with COPD may worsen during exacerbations, but there is limited information relating levels of systemic inflammatory markers with symptoms and physiologic changes during an exacerbation METHODS: We measured dyspnea using the visual analog scale, pulmonary function tests, hemograms, and plasma levels for interleukin (IL)-6, IL-8, leukotriene B(4) (LTB4), tumor necrosis factor-alpha, and secretory leukocyte protease inhibitor (SLPI) in 20 patients on admission to a hospital for exacerbation of COPD (ECOPD), 48 h later (interim), and 8 weeks after hospital discharge (recovery). RESULTS: Dyspnea was present in all patients. Inspiratory capacity improved faster than FEV(1). Compared to recovery, there was a significant increase in the mean (+/- SD) hospital admission plasma levels of IL-6 (6.38 +/- 0.72 to 2.80 +/- 0.79 pg/mL; p = 0.0001), IL-8 (8.18 +/- 0.85 to 3.72 +/- 0.85 pg/mL; p = 0.002), and LTB4 (8,675 +/- 1,652 to 2,534 +/- 1,813 pg/mL; p = 0.003), and the percentages of segmented neutrophils (79 to 69\%; p < 0.02) and band forms (7.3 to 1.0\%; p < 0.01) in peripheral blood, with no changes in TNF-alpha and SLPI. There were significant correlations between changes in IL-6 (r = 0.61; p = 0.01) and IL-8 (r = 0.56; p = 0.04) with changes in dyspnea and levels of IL-6 (r = -0.51; p = 0.04) and TNF-alpha (r = -0.71; p < 0.02) with changes in FEV(1.) CONCLUSIONS: Hospitalized patients with ECOPDs experience significant changes in systemic cytokine levels that correlate with symptoms and lung function. An ECOPD represents not only a worsening of airflow obstruction but also increased systemic demand in a host with limited ventilatory reserve. This article was published in Chest and referenced in Journal of Pulmonary & Respiratory Medicine

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