Linked Life Data

11179819

Source:http://linkedlifedata.com/resource/pubmed/id/11179819

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
2001-2-22
pubmed:abstractText
In the sphinghid moth Manduca sexta, two allatoactive neuropeptides appear to be responsible for regulating juvenile hormone (JH) production by the corpora allata (CA). These peptides (M. sexta allatostatin, Mas-AS, and M. sexta allatotropin, Mas-AT) respectively inhibit and stimulate in vitro JH biosynthesis by CA in this insect. However, although Mas-AS inhibits CA in both larval and adult insects, Mas-AT is active only in adult M. sexta. The situation in other lepidopteran species is less clear-cut and, although both peptides have been detected (usually by immunologic and/or molecular techniques) in several other moths (including noctuids), their function as regulators of JH production remains uncertain. In the tomato moth Lacanobia oleracea (Lepidoptera: Noctuidae), we have previously demonstrated the occurrence of Mas-AS and/or Mas-AT in extracts of CA, brain and other organs, and have shown that both peptides are present in larval and adult forms. However, in L. oleracea, although Mas-AS inhibits larval and adult CA in vitro, it does so only at relatively high concentrations, and to a maximum of only approximately 70%. By contrast, Mas-AT (which is also present in larval and adult L. oleracea) stimulates larval and adult CA, but is substantially more potent ( approximately 100 fold) than the allatostatin. In this paper we present the results of paired, concurrent measurements (using ELISA) of levels of Mas-AS and Mas-AT in brains, CA and hemolymph (plasma and hemocytes) of L. oleracea at times when there are marked changes in JH titers. We also present data on the in vitro rates of JH biosynthesis by isolated CA, and on hemolymph JH esterase activity measured at the same critical developmental times, and discuss all of these data in relation to the putative allatoregulatory roles of the M. sexta allatotropic and allatostatic neuropeptides in L. oleracea.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Feb
pubmed:issn
0196-9781
pubmed:author
pubmed:issnType
Print
pubmed:volume
22
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
255-61
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
2001
pubmed:articleTitle
The role of allatostatic and allatotropic neuropeptides in the regulation of juvenile hormone biosynthesis in Lacanobia oleracea (Lepidoptera: Noctuidae).
pubmed:affiliation
Central Science Laboratory, Ministry of Agriculture, Fisheries and Food, Sand Hutton, York YO41 1LZ, United Kingdom. j.edwards@csl.gov.uk
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't