Linked Life Data

15862564

Source:http://linkedlifedata.com/resource/pubmed/id/15862564

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1-2
pubmed:dateCreated
2005-5-2
pubmed:abstractText
Membrane-bound progestin receptors (mPRs) are potential intermediaries in meiotic maturation of fish oocytes and other physiological processes. In this study, gene expression of the mPRs in the ovary of catfish and zebrafish during the reproductive cycle and the hormonal regulation of the expression were investigated. The transcript abundance of catfish mPRalpha gradually increased in conjunction with ovarian growth and then decreased prior to spawning period whereas the ovarian gene expression of mPRbeta varied little throughout the reproductive cycle. In contrast, mPRgamma gene expression peaked early in the mid-vitellogenic stage. The transcript abundance of zebrafish mPRalpha and beta was low in ovarian follicles at early stages of oogenesis and gradually increased after the onset of vitellogenic growth and, thereafter, the gene expression did not vary. Gonadotropic treatment did not modulate the ovarian expression of mPRalpha and beta genes in either catfish or zebrafish. On the other hand, exposure to 17,20beta-dihydroxy-4-pregenen-3-one (the maturation-inducing steroid in this species) resulted in the down-regulation of mPRalpha in catfish ovary whereas gene expression was significantly induced by estradiol-17beta. Taken together, these findings suggest that gonadotropin-induced final oocyte maturation may not require an induction of mPR(s) expression or that the gonadotropin stimulates mPR protein production at the post-transcriptional level, presuming these receptors are indispensable for oocyte maturation.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
May
pubmed:issn
0016-6480
pubmed:author
pubmed:issnType
Print
pubmed:day
15
pubmed:volume
142
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
204-11
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
2005
pubmed:articleTitle
Membrane-bound progestin receptors in channel catfish and zebrafish ovary: changes in gene expression associated with the reproductive cycles and hormonal reagents.
pubmed:affiliation
Center of Marine Biotechnology, University of Maryland Biotechnology Institute, 701 East Pratt Street, Baltimore, MD 21202, USA.
pubmed:publicationType
Journal Article, Comparative Study, Research Support, U.S. Gov't, Non-P.H.S., Research Support, Non-U.S. Gov't