Linked Life Data

10694419

Source:http://linkedlifedata.com/resource/pubmed/id/10694419

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
2000-4-3
pubmed:abstractText
Formation of the long bones requires a cartilage template. Cartilage formation (chondrogenesis) proceeds through determination of cells and their aggregation into prechondrogenic condensations, differentiation into chondrocytes, and later maturation. Several studies indicate that members of the bone morphogenetic protein (BMP) family promote cartilage formation, but the exact step(s) in which BMPs are involved during this process remains undefined. To resolve this issue, we have used a retroviral vector to misexpress the BMP antagonist Noggin in the embryonic chick limb. Unlike previous reports, we have characterized the resulting phenotype in depth, analyzing histological and early chondrogenic markers, as well as the patterns of cell death and proliferation. Misexpression of Noggin prior to the onset of chondrogenesis leads to the total absence of skeletal elements, as previously reported (J. Capdevila and R. L. Johnson, 1998, Dev. Biol. 197, 205-217). Noggin inhibits cartilage formation at two distinct steps. First, we demonstrate that mesenchymal cells do not aggregate into prechondrogenic condensations, and additional results suggest that these cells persist in an undifferentiated state. Second, we show that differentiation of chondroprogenitors into chondrocytes can also be blocked, concurrent with expanded expression of a presumptive joint region marker. In addition, we observed alterations in muscle and tendon morphogenesis, and the potential role of BMPs in these processes will be discussed. Our studies therefore provide in vivo evidence that BMPs are necessary for different steps of chondrogenesis: chondroprogenitor determination and/or condensation and subsequent differentiation into chondrocytes.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Mar
pubmed:issn
0012-1606
pubmed:author
pubmed:copyrightInfo
Copyright 2000 Academic Press.
pubmed:issnType
Print
pubmed:day
15
pubmed:volume
219
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
237-49
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
2000
pubmed:articleTitle
BMPs are required at two steps of limb chondrogenesis: formation of prechondrogenic condensations and their differentiation into chondrocytes.
pubmed:affiliation
Memorial Sloan-Kettering Cancer Center, Molecular Biology Program and Howard Hughes Medical Institute, New York, New York, 10021, USA.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S., Research Support, Non-U.S. Gov't