Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
1997-6-26
pubmed:abstractText
The ontogeny of circulating concentrations of insulin-like growth factor (IGF-)-I, IGF-II, and IGF-binding proteins (IGF-BPs) was examined in the chick embryo. Distinct ontogenic changes in the circulating concentrations of IGF-I and IGF-II were observed. The present study confirms the overall profile for circulating concentrations of IGF-I. During middevelopment, plasma concentrations of IGF-I increased to a maximum which was attained on Day 14.5 of incubation. Thereafter, plasma concentrations of IGF-I declined with decreases (P < 0.05) between Days 14.5 and 15.5 and between Days 16.5 and 17.5 of incubation. In contrast to the monophasic profile for IGF-I, plasma concentrations of IGF-II were maximal on Day 10.5 of incubation and declined to a nadir on Day 17.5 of incubation. In late developmental stages (17.5 or 18.5 days of incubation), three IGF-BPs, having molecular weights of 22, 28, and 36 kDa, were detected in the plasma of chick embryos. No significant ontogenic changes in the circulating levels of the 28- and 36-kDa IGF-BPs were observed. However, it should be noted that prior to Day 17.5 of incubation, the 22-kDa IGF-BP was nondetectable in the circulation. The role of these changes in the functioning of IGF in embryonic development is discussed.
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:volume
106
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
265-70
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1997
pubmed:articleTitle
Ontogenic changes in the circulating concentrations of insulin-like growth factor (IGF)-I, IGF-II, and IGF-binding proteins in the chicken embryo.
pubmed:affiliation
Department of Animal Sciences, Rutgers, State University of New Jersey, New Brunswick 08903, USA.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, Non-P.H.S., Research Support, Non-U.S. Gov't