Endothelin-1 induces GM-CSF, IL-6 and IL-8 but not G-CSF release from a human bronchial epithelial cell line (BEAS-2B)

Neuropeptides
J MullolJ H Shelhamer

Abstract

Endothelin (ET) is a powerful vasoconstrictor and bronchoconstrictor peptide that may be involved in the pathogenesis of bronchial asthma. We have investigated the effect of ET on the secretion of IL-6, IL-8, GM-CSF and G-CSF in a bronchial epithelial cell line (BEAS-2B). Incubation of BEAS-2B cells with ET-1 (10(-13) to 10(-7) M) for 4 h caused dose-related increases in the release of IL-8 (68% increase above control, P < 0.001) and IL-6 (43% increase above control, P < 0.001), compared to untreated control cells. After 48 h incubation, ET-1 also increased the release of IL-8 by 35% (P < 0.001) and GM-CSF by 38% (P < 0.01). ET-1 had no significant effect on G-CSF release. ET-1 did not induce cell proliferation at 24 or 48 h. Since ET-immunoreactive materials are expressed in epithelial cells in asthma, it is possible that ET-1 of epithelial origin may act in a paracrine or autocrine fashion on airway epithelial ET receptors to stimulate IL-8, IL-N6 and GM-CSF release. Thus, ET-1 may play a role in the regulation of the cytokine responses involved in inflammation of the airway mucosa.

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Citations

Apr 28, 2004·Respiratory Physiology & Neurobiology·Limei ZhouMarc B Hershenson
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