Linked Life Data

9436100

Source:http://linkedlifedata.com/resource/pubmed/id/9436100

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
12
pubmed:dateCreated
1998-2-18
pubmed:abstractText
Increased sympathetic activity, including peripheral release of catecholamines, has been hypothesized to inhibit the milk ejection reflex by blocking the release of oxytocin, by blocking the effect of oxytocin at the mammary gland, or both. We attempted to relate differences in milking characteristics of Lacaune and East Friesen ewes to the degree of sympathetic arousal, responses of catecholamines and oxytocin to machine-milking and to manual teat stimulation followed by milking. Peripheral concentrations of epinephrine, 67 +/- 6 pg/ml for Lacaunes and 57 +/- 5 pg/ml for Friesens, were essentially constant. Peripheral concentrations of norepinephrine averaged 682 +/- 68 pg/ml for Lacaunes and 250 +/- 54 pg/ml for Friesens. Elevated norepinephrine concentrations during the pretreatment period were associated with the inhibition of oxytocin responses. When norepinephrine concentrations during the pretreatment period exceeded 300 pg/ml for Friescens, or were rising and exceeded 700 pg/ml at initiation of the experimental period for Lacaunes, oxytocin release was inhibited. Results from this study clearly showed that basal concentrations of norepinephrine vary with breed of ewes and provided the first direct evidence that increased sympathetic activity can result in central inhibition of the milk ejection reflex.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Dec
pubmed:issn
0022-0302
pubmed:author
pubmed:issnType
Print
pubmed:volume
80
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
3205-11
pubmed:dateRevised
2003-11-14
pubmed:meshHeading
pubmed:year
1997
pubmed:articleTitle
Response of catecholamines to manual teat stimulation or machine-milking of Lacaune and Friesen dairy ewes.
pubmed:affiliation
Livestock and Poultry Sciences Institute, Agricultural Research Service, USDA, Beltsville, MD 20705, USA.
pubmed:publicationType
Journal Article