Gram-negative, but not Gram-positive, bacteria elicit strong PGE2 production in human monocytes.

Abstract:

:Gram-positive and Gram-negative bacteria induce different cytokine patterns in human mononuclear cells. We have seen that Gram-positives preferentially induce IL-12 and TNF-alpha, whereas Gram-negatives induce more IL-10, IL-6, and IL-8. In this study, we compared the capacity of these two groups of bacteria to induce PGE2. Monocytes stimulated with Gram-negative bacterial species induced much more PGE2 than did Gram-positive bacteria (5600 +/- 330 vs. 1700 +/- 670 pg/mL, p < 0.001). Blocking of COX-2 by NS398 abolished PGE2 production, but did not alter the cytokine patterns induced by Gram-positive and Gram-negative bacteria. We suggest that Gram-positive and Gram-negative bacteria may stimulate different innate effector functions; Gram-positive bacteria promoting cell-mediated effector functions whereas Gram-negative bacteria inducing mediators inhibiting the same.

journal_name

Inflammation

journal_title

Inflammation

authors

Hessle CC,Andersson B,Wold AE

doi

10.1023/b:ifla.0000006700.41614.21

keywords:

subject

Has Abstract

pub_date

2003-12-01 00:00:00

pages

329-32

issue

6

eissn

0360-3997

issn

1573-2576

journal_volume

27

pub_type

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