The e¡ect of Pseudomonas exotoxin A on cytokine production in whole blood exposed to Pseudomonas aeruginosa
نویسندگان
چکیده
To determine the effect of Pseudomonas aeruginosa exotoxin A (P-ExA) on cytokine production, we studied cytokine release induced by heat-killed P. aeruginosa (HKPA) in human whole blood in the presence or absence of P-ExA. P-ExA (0.01^1 Wg ml31) caused a dosedependent decrease in HKPA-induced production of tumor necrosis factor K (TNF), interleukin (IL-) 10, IL-6 and IL-8 (all P6 0.05). P-ExA-induced inhibition of IL-10, IL-6 and IL-8 release was not dependent on reduced TNF concentrations, since the relative attenuation of the production of these cytokines was similar in the presence or absence of a neutralizing anti-TNF antibody. The effect of P-ExA on cytokine production may offer a disadvantage to the host with respect to clearance of the infection. ß 2000 Federation of European Microbiological Societies. Published by Elsevier Science B.V. All rights reserved.
منابع مشابه
The effect of pseudomonas exotoxin A on cytokine production in whole blood exposed to Pseudomonas aeruginosa.
To determine the effect of Pseudomonas aeruginosa exotoxin A (P-ExA) on cytokine production, we studied cytokine release induced by heat-killed P. aeruginosa (HKPA) in human whole blood in the presence or absence of P-ExA. P-ExA (0.01-1 microgram ml(-1)) caused a dose-dependent decrease in HKPA-induced production of tumor necrosis factor alpha (TNF), interleukin (IL-) 10, IL-6 and IL-8 (all P<0...
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