Linked Life Data

9724019

Source:http://linkedlifedata.com/resource/pubmed/id/9724019

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
9
pubmed:dateCreated
1998-9-23
pubmed:abstractText
Mice with a targeted disruption (knock-out) of the PRL gene (PRL-KO) were used to study the physiological role of PRL in the control of male neuroendocrine functions related to reproduction. Compared with normal males, PRL-KO mice had significant reductions in median eminence dopamine content, plasma LH levels, LH and FSH secretion in vitro (per mg pituitary), and weights of seminal vesicles and ventral prostate. PRL was not detectable in incubation medium with pituitaries from PRL-KO mice. No alterations were detected in PRL-KO mice in median eminence norepinephrine, plasma testosterone levels, or testosterone release (per mg testis) in vitro with or without LH. No differences were detected in PRL-KO vs. normal male mice in the interval from housing with normal female mice until conception, rate of pregnancy, or the number of live pups per litter. Pituitary weight in PRL-KO mice was increased (1.78 +/- 0.22 vs. 3.35 +/- 0.20 mg; P < 0.001), presumably due to reduced feedback inhibition and hypertrophy and/or hyperplasia of nonfunctional lactotrophs. These results indicate that the absence of PRL reduces pituitary LH release, attenuates median eminence dopaminergic activity, and affects the growth of seminal vesicles and ventral prostate. Although it was previously shown that PRL can repair the reproductive defect in male pituitary dwarf mice, our current results imply that the PRL deficiency alone is not sufficient to cause male infertility, although there are obvious alterations in reproductive neuroendocrine function in PRL-KO males.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
AIM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Sep
pubmed:issn
0013-7227
pubmed:author
pubmed:issnType
Print
pubmed:volume
139
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
3691-5
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1998
pubmed:articleTitle
Neuroendocrine and reproductive functions in male mice with targeted disruption of the prolactin gene.
pubmed:affiliation
Department of Physiology, Southern Illinois University School of Medicine, Carbondale 62901-6512, USA. rsteger@som.siu.edu
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S.