Bleomycin-induced lung injury is enhanced by interferon-alpha.

Abstract:

:We have evaluated the effect of intraperitoneal (I.P.) injection of human recombinant interferon-2alpha (IFN-alpha) on Bleomycin-induced pulmonary injury in hamsters. Pulmonary injury was induced by a single intratracheal (I.T.) instillation of Bleomycin (Bleo). Six groups of male Syrian hamsters were treated as follows: 1) I.T. Bleo and daily I.P. injections of low-dose interferon-alpha (2 x 10(4) U), 2) I.T. Bleo and daily I.P. injections of high-dose interferon-alpha (10(5) U), 3) I.T. Bleo and I.P. injections of saline, 4) I.T. saline and I.P. low-dose IFN-alpha, 5) I.T. saline and I.P. high-dose IFN-alpha, 6) I.T. saline and I.P. saline. Animals were sacrificed 28 days after I.T. treatment. Lung injury was evaluated histologically and biochemically. Treatment of hamsters with low-dose but not high-dose IFN-alpha significantly augmented the Bleo-induced lung injury, as determined by a semiquantitative morphological index. Lung hydroxyproline measurements were highest in Bleo-low-dose-IFN-alpha followed by Bleo-high-dose-IFN-alpha and Bleo-Sal as compared to Sal-Sal and Sal-IFN-alpha controls. These results suggest that IFN-alpha augments Bleo-induced lung injury but that this effect is complex and does not follow a simple-dose-response pattern.

journal_name

Life Sci

journal_title

Life sciences

authors

Berkman N,Goldstein RH,Breuer R

doi

10.1016/s0024-3205(97)00332-9

subject

Has Abstract

pub_date

1997-01-01 00:00:00

pages

PL415-21

issue

26

eissn

0024-3205

issn

1879-0631

pii

S0024320597003329

journal_volume

60

pub_type

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