Linked Life Data

17989112

Source:http://linkedlifedata.com/resource/pubmed/id/17989112

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
2008-1-10
pubmed:abstractText
Connective tissue growth factor (CTGF) is overexpressed in kidney diseases associated with extracellular matrix accumulation. Angiotensin II (ANG II) participates in renal fibrosis by the upregulation of growth factors, including CTGF, and extracellular matrix proteins, such as type IV collagen. During renal injury, ANG II and the macrophage-produced cytokine interleukin-1beta (IL-1beta) may be present simultaneously in the glomerular environment. However, there are no studies about the interaction between ANG II and IL-1beta in renal fibrosis. For this reason, in cultured mesangial cells (MC), we investigated whether IL-1beta could regulate ANG II-mediated collagen accumulation and the mechanisms underlying this process. In MC, CTGF is a downstream mediator of type IV collagen production induced by ANG II. IL-1beta did not increase the production of CTGF and type IV collagen but significantly inhibited ANG II-induced CTGF and type IV collagen overexpression. Moreover, IL-1beta also inhibited type IV collagen upregulation caused by exogenous recombinant CTGF. Matrix metalloproteinase-9 (MMP-9) is the main enzyme involved in type IV collagen degradation. In MC, coincubation of IL-1beta and ANG II caused a synergistic increase in MMP-9 gene expression and activity, associated with type IV collagen inhibition. The described IL-1beta effects were dependent on activation of ERK/MAPK but independent p38-MAPK, JNK, phosphatidylinositol 3-kinase/Akt, and Rho-associated kinase pathways. In summary, these data indicate that IL-1beta inhibited ANG II-mediated type IV collagen production, via CTGF downregulation, and increased type IV collagen degradation, through MMP-9 upregulation. Our in vitro data show that the proinflammatory cytokine IL-1beta abrogates ANG II-induced CTGF production, describing antagonistic activities of proinflammatory cytokines on ANG II actions.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jan
pubmed:issn
1931-857X
pubmed:author
pubmed:issnType
Print
pubmed:volume
294
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
F149-60
pubmed:dateRevised
2011-4-28
pubmed:meshHeading
pubmed-meshheading:17989112-Angiotensin II, pubmed-meshheading:17989112-Animals, pubmed-meshheading:17989112-Cells, Cultured, pubmed-meshheading:17989112-Collagen Type IV, pubmed-meshheading:17989112-Connective Tissue Growth Factor, pubmed-meshheading:17989112-Drug Synergism, pubmed-meshheading:17989112-Extracellular Matrix, pubmed-meshheading:17989112-Extracellular Signal-Regulated MAP Kinases, pubmed-meshheading:17989112-Gene Expression Regulation, pubmed-meshheading:17989112-Immediate-Early Proteins, pubmed-meshheading:17989112-Intercellular Signaling Peptides and Proteins, pubmed-meshheading:17989112-Interleukin-1beta, pubmed-meshheading:17989112-Matrix Metalloproteinase 9, pubmed-meshheading:17989112-Mesangial Cells, pubmed-meshheading:17989112-Rats, pubmed-meshheading:17989112-Signal Transduction, pubmed-meshheading:17989112-Transforming Growth Factor beta
pubmed:year
2008
pubmed:articleTitle
Inhibitory effect of interleukin-1beta on angiotensin II-induced connective tissue growth factor and type IV collagen production in cultured mesangial cells.
pubmed:affiliation
Cellular Biology in Renal Diseases Laboratory, Fundación Jiménez Díaz, Universidad Autónoma Madrid, Madrid, Spain.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't