Linked Life Data

16455967

Source:http://linkedlifedata.com/resource/pubmed/id/16455967

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
4
pubmed:dateCreated
2006-2-3
pubmed:abstractText
Mouse mast cell development and survival are largely controlled by the cytokines IL-3 and stem cell factor (SCF). We have found that IL-3 stimulation of bone marrow cells induces the production of TNF via a PI3K- and MAPK kinase/ERK-dependent pathway. Specifically, Mac-1-positive cells were responsible for TNF production, which peaked on days 7-10 of culture and decreased rapidly thereafter. The importance of IL-3-induced TNF secretion was demonstrated by the failure of TNF-deficient bone marrow cells to survive for >3 wk when cultured in IL-3 and SCF, a defect that was reversed by the addition of soluble TNF. The development of human mast cells from bone marrow progenitors was similarly hampered by the addition of TNF-blocking Abs. Cell death was due to apoptosis, which occurred with changes in mitochondrial membrane potential and caspase activation. Apoptosis appeared to be due to loss of IL-3 signaling, because TNF-deficient cells were less responsive than their wild-type counterparts to IL-3-mediated survival. In vitro cultured mast cells from TNF-deficient mice also demonstrated reduced expression of the high affinity IgE receptor, which was restored to normal levels by the addition of soluble TNF. Finally, TNF-deficient mice demonstrated a 50% reduction in peritoneal mast cell numbers, indicating that TNF is an important mast cell survival factor both in vitro and in vivo.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
AIM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Feb
pubmed:issn
0022-1767
pubmed:author
pubmed:issnType
Print
pubmed:day
15
pubmed:volume
176
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
2114-21
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
2006
pubmed:articleTitle
IL-3-mediated TNF production is necessary for mast cell development.
pubmed:affiliation
Department of Biology, Virginia Commonwealth University, Richmond, 23284, USA.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't, Research Support, N.I.H., Extramural