Experimental Animals
Online ISSN : 1881-7122
Print ISSN : 1341-1357
ISSN-L : 0007-5124
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Strain Difference in Pituitary-adrenal Axis between Wistar-Imamichi and Long Evans Adult Male Rats
Atsushi TOHEIYasuyuki MOGIHiroe KONRyoji HOKAOMotoo SHINODA
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JOURNAL FREE ACCESS

2003 Volume 52 Issue 5 Pages 437-439

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Abstract

In the present study, we used closed colony-Wistar-Imamichi (WI), inbred WI and Long Evans (LE) adult male rats to examine the secretion of ACTH and corticosterone in response to restraint stress. Blood (0.3 ml) was withdrawn through a jugular cannula at 0, 15, 30, 60 and 120 min after the onset of restraint stress. Plasma concentrations of ACTH and corticosterone increased after stress in all groups, but the responses of ACTH and corticosterone secretion were higher in LE rats than in WI rats. Present data suggest that the LE rat might be a good model as a high-response strain and the closed colony or the inbred WI rat might be a good model as a low-response strain in restraint stress experiments.

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© 2003 Japanese Association for Laboratory Animal Science
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