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Cysteinyl leukotrienes induce macrophage inflammatory protein-1 in human monocytes/macrophages. | LitMetric

AI Article Synopsis

Article Abstract

Background: Macrophage inflammatory protein-1alpha (MIP-1alpha) and MIP-1beta are known for their chemotactic and proinflammatory effects on monocytes/macrophages which have a cysteinyl leukotriene 1 (CysLT(1)) receptor.

Methods: We examined MIP-1alpha and MIP-1beta production stimulated by CysLTs (LTC(4), LTD(4), and LTE(4)) in THP-1 cells, a human monocytic leukemia cell line, and peripheral blood mononuclear cells (PBMCs). Moreover, we examined the inhibitory effect of pranlukast, a CysLT(1) receptor antagonist, and inhibitors of three major mitogen-activated protein kinases (MAPK) on the induction of MIP-1alpha and MIP-1beta production by CysLTs.

Results: ELISA demonstrated that CysLTs induced MIP-1alpha and MIP-1beta production in THP-1 cells and PBMCs. PCR demonstrated that LTD(4) increased MIP-1alpha and MIP-1beta mRNA expressions in THP-1 cells. Pranlukast blocked MIP-1alpha and MIP-1beta production promoted by LTD(4) in THP-1 cells and PBMCs. Moreover, an inhibitor of extracellular signal-regulated kinase (ERK) attenuated the induction of MIP-1alpha and MIP-1beta production by LTD(4) in THP-1 cells whereas the inhibitors of c-Jun NH2-terminal kinase or p38 MAPK did not.

Conclusion: CysLTs induce MIP-1alpha and MIP-1beta production mediated by ERK via binding to the CysLT(1) receptor in human monocytes/macrophages.

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Source
http://dx.doi.org/10.1159/000155745DOI Listing

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