TNF-induced IL-8 and MCP-1 production in the eosinophilic cell line, EOL-1.

Abstract:

:The role of eosinophils in inflammation and their mode of activation is not well understood. Eosinophil accumulation and subsequent expression of cytokines at the site of inflammation may play a role in exacerbation of inflammatory responses. In the present study, we have examined the role of TNF-alpha in eosinophil activation and chemokine production using a human leukaemic eosinophil cell line, EOL-1. Initial studies demonstrated that TNF-alpha induced the upregulation of IL-8 and MCP-1 mRNA and protein. Kinetic studies indicated production of chemokines, IL-8 and MCP-1, as early as 4 h post-activation, with peak levels of chemokine produced at 8 h, and decreasing by 24 h post-TNF-alpha activation. When IL-10, a suppressive cytokine, was incubated with TNF-alpha and EOL-1 cells, no effect was observed on IL-8 and MCP-1 production. However, dexamethasone, a glucocorticoid, demonstrated potent inhibitory effects on the EOL-1-derived chemokines. These studies indicate that eosinophils may be a significant source of chemokines capable of participating in, and maintaining, leukocyte recruitment during inflammatory responses, such as asthma.

journal_name

Mediators Inflamm

authors

Goldstein LA,Strieter RM,Evanoff HL,Kunkel SL,Lukacs NW

doi

10.1155/S0962935196000312

subject

Has Abstract

pub_date

1996-01-01 00:00:00

pages

218-23

issue

3

eissn

0962-9351

issn

1466-1861

journal_volume

5

pub_type

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