Linked Life Data

11679059

Source:http://linkedlifedata.com/resource/pubmed/id/11679059

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
10
pubmed:dateCreated
2001-10-26
pubmed:abstractText
Frequent blood sampling from males rats was used to study hypothalamic-pituitary-adrenal (HPA) axis activation during arthritis and its association with diminished responses to acute psychological stress. In control rats, corticosterone release occurred in a series of 13 +/- 1 pulses per 24 h. Induction of arthritis by Mycobacterium-adjuvant injection initially increased the rate of hormone release within each pulse and, by day 14 postinjection, when hind-paw inflammation was established, caused a marked increase in pulse frequency to 22 +/- 1 per 24 h leading directly to elevated circulating corticosterone levels. In both control and adjuvant-treated rats, there was a marked response to a 10-min noise stress when the stimulus coincided with a rising or interpulse phase of the endogenous corticosterone rhythm. However, when the noise stress coincided with a falling phase of this rhythm, the response was greatly diminished. Since corticosterone pulse frequency was markedly increased and hence interpulse interval decreased by day 14, there was an increased probability of the noise stress occurring during the nonstress responsive falling phase of the corticosterone secretory cycle. As a result, the group mean response to noise stress was significantly smaller in the arthritic than the controls (70.2 +/- 9.2 versus 107.8 +/- 13.0 ng/ml, respectively). In contrast to the differential response to noise stress, all rats showed similar responses to the acute immunological challenge with i.v. lipopolysaccharide. Thus, altered basal pulse frequency is a major factor influencing HPA activation during acute psychological stress.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Oct
pubmed:issn
0953-8194
pubmed:author
pubmed:issnType
Print
pubmed:volume
13
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
905-11
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
2001
pubmed:articleTitle
Increased corticosterone pulse frequency during adjuvant-induced arthritis and its relationship to alterations in stress responsiveness.
pubmed:affiliation
Department of Medicine, University of Bristol, Bristol Royal Infirmary, Bristol, UK. richard.windle@nottingham.ac.uk
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't