Role of prostaglandins E1, E2 and F2 alpha in the brain in interleukin 1 beta-induced adrenocorticotropin secretion in the rat.

Abstract:

:It is well known that interleukin (IL)-1 is a potent activator of the hypothalamo-pituitary-adrenal axis in the rat. Many studies have reported that prostaglandins (PGs), especially PGE2, in the brain may mediate the IL-1 stimulation of corticotropin-releasing hormone release, which then leads to adrenocorticotropin (ACTH) secretion. However, a general consensus has yet to emerge regarding whether PGE2 is the only or the most important PG in the brain mediating IL-1-induced ACTH secretion in the rat. To address this question, we examined the effect of intracerebroventricular (icv) administration of antisera against PGE1, PGE2 or PGF2 alpha, or normal rabbit serum on the ACTH response induced by an icv injection of IL-1 beta in the rat. Each antibody or normal rabbit serum (as the control) was given icv 15 min before an icv administration of human recombinant IL-1 beta (50 ng). IL-1 beta produced a significant rise in plasma ACTH levels, and this response was significantly suppressed by either of the three PG antibodies. Interestingly, the inhibitory effect of anti-PGE2 antibody seemed to be somewhat weaker than those of the other two antibodies. We conclude that not only PGE2 but also PGE1 and PGF2 alpha in the brain may mediate the IL-1 beta stimulation of ACTH secretion in the rat.

journal_name

Cytokine

journal_title

Cytokine

authors

Watanobe H,Sasaki S,Takebe K

doi

10.1006/cyto.1995.0083

subject

Has Abstract

pub_date

1995-10-01 00:00:00

pages

710-2

issue

7

eissn

1043-4666

issn

1096-0023

pii

S1043-4666(85)70083-X

journal_volume

7

pub_type

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