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Corticosterone, but not Glucose, Treatment Enables Fasted Adrenalectomized Rats to Survive Moderate HemorrhageFed adrenalectomized rats survive the stress of hemorrhage and hypovolemia, whereas fasted adrenalectomized rats become hypotensive and hypoglycemic after the first 90 min and die within 4 hours (h). We have studied the effects of glucose and corticosterone (B) infusions after hemorrhage as well as treatment with B at the time of adrenalectomy on the capacity of chronically prepared, conscious, fasted, adrenalectomized rats to survive hemorrhage. We have also measured the magnitudes of vasoactive hormone responses to hemorrhage. Maintenance of plasma glucose concentrations did not sustain life; however, treatment of rats at the time of adrenalectomy with B allowed 100 percent survival, and acute treatment of adrenalectomized rats at the time of hemorrhage allowed about 50 percent survival during the 5-h posthemorrhage observation period. Rats in the acute B infusion group that died exhibited significantly increased plasma B and significantly decreased plasma glucose concentrations by 2 h compared to the rats that lived. Plasma vasopressin, renin, and norepinephrine responses to hemorrhage were markedly augmented in the adrenalectomized rats not treated with B, and plasma vasopressin concentrations were significantly elevated at 1 and 2 h in all of the rats that subsequently died compared to values in those that lived. We conclude that: 1) death after hemorrhage in fasted adrenalectomized rats is not a result of lack of glucose; 2) chronic and, to an extent, acute treatment of fasted adrenalectomized rats with B enables survival; 3) fasted adrenalectomized rats exhibit strong evidence of hepatic insufficiency which is not apparent in either fed adrenalectomized rats or B-treated fasted adrenalectomized rats; 4) death after hemorrhage in fasted adrenalectomized rats may result from hepatic failure as a consequence of marked splanchnic vasoconstriction mediated bv the actions of extraordinarily high levels of vasoactive hormones after hemorrhage; and 5) B appears to act to decrease the magnitude of response of vasoactive hormones after hemorrhage in fasted adrenatectomized rats.
Document ID
19990027913
Document Type
Reprint (Version printed in journal)
Authors
Darlington, Daniel N. (NASA Ames Research Center Moffett Field, CA United States)
Chew, Gordon (California Univ. San Francisco, CA United States)
Ha, Taryn (California Univ. San Francisco, CA United States)
Keil, Lanny C. (NASA Ames Research Center Moffett Field, CA United States)
Dallman, Mary F. (NASA Ames Research Center Moffett Field, CA United States)
Date Acquired
August 19, 2013
Publication Date
January 1, 1990
Publication Information
Publication: Endocrinology
Volume: 127
Issue: 2
ISSN: 0013-7227
Subject Category
Life Sciences (General)
Report/Patent Number
NASA/CR-1990-204879
NAS 1.26:204879
Funding Number(s)
CONTRACT_GRANT: NCC2-354
CONTRACT_GRANT: N00014-88-K-0059
CONTRACT_GRANT: USPHS-DK-28172
Distribution Limits
Public
Copyright
Other