Linked Life Data

20689058

Source:http://linkedlifedata.com/resource/pubmed/id/20689058

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
4
pubmed:dateCreated
2010-9-29
pubmed:abstractText
Activated pancreatic stellate cells (PSCs) play a pivotal role in pancreatic fibrosis in chronic pancreatitis and pancreatic cancer. Recent studies have suggested a role of IL-33, a newly identified IL-1 family member, in fibrosis. We here examined the expression of IL-33 and the IL-33-mediated regulation of cell functions in PSCs. PSCs were isolated from human and rat pancreas tissues. The expression of IL-33 was examined by Western blotting, PCR, ELISA, and immunostaining. The roles of IL-33 in the regulation of PSC functions were examined by using recombinant IL-33 and small interfering RNA. Activated PSCs expressed IL-33 in the nucleus, and the expression was increased by IL-1?, TNF-?, PDGF-BB, and IFN-?, but not TGF-?1. Nuclear IL-33 expression was also observed in the pancreatic acinar and ductal cells. IL-1? induced IL-33 expression mainly through the activation of NF-?B and ERK pathways and partially through that of p38 MAP kinase, whereas PDGF-BB induced IL-33 expression mainly through the activation of ERK pathway. PSCs expressed soluble ST2, ST2L, and IL-1RAcP, but the expression level of ST2L was relatively low. Recombinant IL-33 did not stimulate key cell functions of PSCs. Decreased IL-33 expression by small interfering RNA resulted in decreased proliferation in response to PDGF-BB. In conclusion, activated PSCs expressed IL-33 in the nucleus. IL-33 might regulate the PDGF-induced proliferation in PSCs.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Oct
pubmed:issn
1522-1547
pubmed:author
pubmed:issnType
Electronic
pubmed:volume
299
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
G821-32
pubmed:meshHeading
pubmed:year
2010
pubmed:articleTitle
Nuclear expression of interleukin-33 in pancreatic stellate cells.
pubmed:affiliation
Tohoku Univ. Graduate School of Medicine, Sendai, Japan. amasamune@med.tohoku.ac.jp
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't