Linked Life Data

12061239

Source:http://linkedlifedata.com/resource/pubmed/id/12061239

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
2002-6-13
pubmed:abstractText
In the following investigations, the LH secretion of cells from pituitaries in heifers on days 16-18 of their oestrous cycle (n = 14) was analysed. Cells were dissociated with trypsin and collagenase and maintained in a static culture system. For the estimation of LH release, the cells were incubated with various concentrations of mammalian GnRH (Lutrelef) for 6 h. To determine the action of Antarelix (GnRH antagonist), the cells were preincubated for 1 h with concentrations of 10(-5) or 10(-4) M Antarelix followed by 10(-6) M GnRH coincubation for a further 6 h. At the end of each incubation, the medium was collected for LH analysis. Parallel, intracellular LH was qualitatively detected by immunocytochemistry. Changes in the intensity of LH staining within the cells in dependence of different GnRH concentrations were not observed, but a significant increase LH secretion in pituitary cells was measured at 10(-6) M GnRH. Antarelix had no effect on basal LH secretion at concentrations of 10(-4) and 10(-5) M. After coincubation of pituitary cells with Antarelix and GnRH, Antarelix blocked the GnRH-stimulated LH secretion with a maximal effect of 10(-4) M, but the staining of immunoreactive intracellular LH was detected at approximately the same level compared to the pituitary cells treated with exogenous GnRH alone. These data demonstrate that Antarelix is effective in influencing the GnRH-stimulated LH secretion of pituitary cells in vitro. After administration of Antarelix in vivo, the GnRH-stimulated LH secretion of cultured pituitary cells was not inhibited.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:issn
0236-6290
pubmed:author
pubmed:issnType
Print
pubmed:volume
50
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
79-92
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
2002
pubmed:articleTitle
Effect of GnRH and its antagonist (Antarelix) on LH release from cultured bovine anterior pituitary cells.
pubmed:affiliation
Department of Reproductive Biology, Research Institute for the Biology of Farm Animals, 18196 Dummerstorf, Germany.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't