Linked Life Data

17551243

Source:http://linkedlifedata.com/resource/pubmed/id/17551243

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
3
pubmed:dateCreated
2007-6-6
pubmed:abstractText
In penaeid shrimp species, vitellogenin (VTG) synthesis in the ovary and hepatopancreas is under the inhibitory regulation of a neuroendocrine system, the X-organ/sinus gland complex in the paired eyestalks, and eyestalk ablation (removal of the X-organ/sinus gland complex) is widely used for inducing ovarian development. However, the difference in effects of bilateral and unilateral ablation on VTG gene expression has not been clarified so far. In the present study, VTG synthesis was monitored over a 16-day period after ablation and compared between replicates of immature female kuruma prawns, Marsupenaeus (Penaeus) japonicus, that had been bilaterally or unilaterally ablated and control specimens. After bilateral ablation, ovarian development was induced, and the ovarian weight, hemolymph VTG levels, and VTG mRNA levels in the ovary increased significantly. Significant VTG mRNA increase was detected 12 h after bilateral ablation. In contrast, after unilateral ablation, ovarian development was not induced, and the ovarian weight, hemolymph VTG levels, and VTG mRNA levels in the ovary did not change significantly from the control. These results indicate that in immature female prawns, unilateral ablation does not induce VTG gene expression, whereas bilateral ablation induces rapid VTG gene expression (<12 h). The ineffectiveness of unilateral ablation suggests that the remaining X-organ/sinus gland complex in the unilaterally ablated female prawns may secrete sufficient VIH to suppress VTG synthesis.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Mar
pubmed:issn
0289-0003
pubmed:author
pubmed:issnType
Print
pubmed:volume
24
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
233-40
pubmed:meshHeading
pubmed:year
2007
pubmed:articleTitle
Effects of bilateral and unilateral eyestalk ablation on vitellogenin synthesis in immature female kuruma prawns, Marsupenaeus japonicus.
pubmed:affiliation
National Research Institute of Aquaculture, Fisheries Research Agency, Minami-ise, Mie, Japan. takuji@affrc.go.jp
pubmed:publicationType
Journal Article, Comparative Study, Research Support, Non-U.S. Gov't