Linked Life Data

2382051

Source:http://linkedlifedata.com/resource/pubmed/id/2382051

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
1990-9-11
pubmed:abstractText
This study investigated whether the stress associated with a 30-minute journey in a truck could distort the oestradiol-induced surge of luteinising hormone (LH) in dairy cows. Altogether 20 journeys were monitored, 16 to 18 hours after intramuscular administration of 1 mg oestradiol benzoate (OE2). Plasma cortisol concentration was elevated (P less than 0.001) within 30 minutes of the start of each journey, even when the journey was repeated at about weekly intervals, indicating a lack of habituation. The LH surge in response to 11 OE2 treatments in nine non-cycling cows within 30 days after calving was either absent (one cow) or significantly delayed, of shorter duration or of lesser amplitude following transport, compared with untransported OE2-treated controls. However, in six cycling cows, 58 days or more after calving, transport affected the LH surge only once. Even in these cows, the LH surge did not start until the cortisol concentration returned to normal, which may suggest a transient postponement of the LH surge by transport. In conclusion, transport impaired the LH surge in early post partum cows with little or no effect after ovarian cyclicity was resumed. It is hypothesised that endocrine events leading to the onset of the LH surge are more vulnerable to stressors in early post partum cows and in the natural situation this might be responsible for the occurrence of anovulation and cystic ovarian disease.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jul
pubmed:issn
0034-5288
pubmed:author
pubmed:issnType
Print
pubmed:volume
49
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
25-8
pubmed:dateRevised
2008-11-21
pubmed:meshHeading
pubmed:year
1990
pubmed:articleTitle
Relationship between an increase in plasma cortisol during transport-induced stress and failure of oestradiol to induce a luteinising hormone surge in dairy cows.
pubmed:affiliation
University of Liverpool, Department of Veterinary Clinical Science, Leahurst, Neston, South Wirral.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't