The goal of this investigation is to study the mechanisms by which endogenous pyrogen acts upon the thermoregulatory centers of the brain to alter the level at which body temperature is regulated - fever. We are interested in the route by which pyrogen enters the brain and whether it acts on neural tissue to produce prostaglandin E. We further wish to ascertain whether PGE is an essential intermediary in the fever pathway and whether other protein dependent steps are involved prior to the genesis of fever. By observing and quantifying the alterations in PGE levels in cerebrospinal fluid under a variety of natural and pathophysiological conditions, and correlating them with the thermoregulatory responses of rabbits measured by partitional calorimetry, we hope to answer these questions. Several hypotheses are outlined in the proposal together with protocols and techniques to test their validity.

Agency
National Institute of Health (NIH)
Institute
National Institute of Neurological Disorders and Stroke (NINDS)
Type
Research Project (R01)
Project #
5R01NS011487-11
Application #
3394482
Study Section
(SSS)
Project Start
1977-06-01
Project End
1986-03-31
Budget Start
1985-04-01
Budget End
1986-03-31
Support Year
11
Fiscal Year
1985
Total Cost
Indirect Cost
Name
John B. Pierce Laboratory, Inc.
Department
Type
DUNS #
City
New Haven
State
CT
Country
United States
Zip Code
Shimada, S G; Otterness, I G; Stitt, J T (1994) A study of the mechanism of action of the mild analgesic dipyrone. Agents Actions 41:188-92
Stitt, J T (1991) Differential sensitivity in the sites of fever production by prostaglandin E1 within the hypothalamus of the rat. J Physiol 432:99-110
Stitt, J T; Shimada, S G (1991) Site of action of calcium channel blockers in inhibiting endogenous pyrogen fever in rats. J Appl Physiol 71:956-60
Stitt, J T; Shimada, S G (1991) Calcium channel blockers inhibit endogenous pyrogen fever in rats and rabbits. J Appl Physiol 71:951-5
Shimada, S G; Stitt, J T; Angelogianni, P (1990) Effects of cold and capsaicin desensitization on prostaglandin E hypothermia in rats. J Appl Physiol 68:2618-22
Stitt, J T; Shimada, S G (1989) Enhancement of the febrile responses of rats to endogenous pyrogen occurs within the OVLT region. J Appl Physiol 67:1740-6
Stitt, J T; Shimada, S G (1989) Immunoadjuvants enhance the febrile responses of rats to endogenous pyrogen. J Appl Physiol 67:1734-9
Stitt, J T; Shimada, S G (1987) A comparison of the febrile responses of the Brattleboro and Sprague-Dawley strains of rats to endotoxin and endogenous pyrogens. Can J Physiol Pharmacol 65:1377-81
Stitt, J T; Bernheim, H A (1985) Differences in endogenous pyrogen fevers induced by iv and icv routes in rabbits. J Appl Physiol 59:342-7
Stitt, J T (1985) Evidence for the involvement of the organum vasculosum laminae terminalis in the febrile response of rabbits and rats. J Physiol 368:501-11

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