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Strain-related differences in Sephadex bead-induced airway hyperresponsiveness and inflammation in rats.

Authors :
Matsubara S
Nakata A
Kikuchi M
Kikkawa H
Ikezawa K
Naito K
Source :
Inflammation research : official journal of the European Histamine Research Society ... [et al.] [Inflamm Res] 1997 Aug; Vol. 46 (8), pp. 299-305.
Publication Year :
1997

Abstract

Objective: The aim of this study was to compare Sephadex G-200 (Sephadex)-induced airway hyperresponsiveness (AHR) and pulmonary eosinophilia among some rat strains.<br />Materials: Sprague-Dawley (SD), Brown-Norway (BN), Fischer 344 (Fischer), Lewis and Wistar-Kyoto (WKY) rats were used.<br />Methods: Sephadex (0.5 mg/animal) was intravenously administered on days 0, 2 and 5. Measurement of AHR using serotonin and bronchoalveolar lavage (BAL) was performed on day 7.<br />Results: The Lewis strain exhibited significant AHR to Sephadex but the BN, Fischer and WKY strains did not. Additionally, the degree of AHR in Lewis rats was smaller than in SD rats throughout the study. Eosinophils in BAL fluid, however, increased in each strain, and the magnitude of the response was BN > Lewis > WKY > Fischer. Both the AHR and pulmonary eosinophilia in Lewis rats were inhibited by dexamethasone (0.1 mg/kg, p.o. x3).<br />Conclusion: These results indicate that the Lewis rat is a useful strain for analysis of the mechanism of Sephadex-induced AHR and airway inflammation.

Details

Language :
English
ISSN :
1023-3830
Volume :
46
Issue :
8
Database :
MEDLINE
Journal :
Inflammation research : official journal of the European Histamine Research Society ... [et al.]
Publication Type :
Academic Journal
Accession number :
9297574
Full Text :
https://doi.org/10.1007/s000110050191