Abstract:
:Syndecan-4 is emerging as an important player in cell interaction with the extracellular environment and has been shown to be involved in the progression of intervertebral disc degeneration. However, the mechanism of syndecan-4 regulation by TNF-α and the role of TGF-β1 in regulating syndecan-4 expression remain poorly understood in nucleus pulposus (NP) cells. The aim of this study was to investigate these mechanisms. We exposed NP cells to TNF-α and the gene, protein expression, and promoter activity levels of syndecan-4 were measured by qPCR, western blotting, and the luciferase reporter assay, respectively. The activation of the MAPK and NF-κB pathways was detected using western blot analysis. Syndecan-4 expression in rat NP cells was increased by TNF-α, but this was neither time nor dose dependent in response to TNF-α. ERK1/2, JNK, and NF-κB pathways were activated following TNF-α treatment. Treatment with ERK1/2 and NF-κB inhibitors decreased the up-regulation of syndecan-4 by TNF-α. However, JNK inhibition showed no effect on syndecan-4 expression induced by TNF-α. TNF-α mediated up-regulation of syndecan-4 was antagonized by TGF-β1. This study provided evidence for the differential regulation by MAPK and NF-κB pathways in the over-expression of syndecan-4 promoted by TNF-α in NP cells. Our results demonstrate that TGF-β1 exerts anabolic effects on intervertebral discs by inhibiting the expression of syndecan-4.
journal_name
Connect Tissue Resjournal_title
Connective tissue researchauthors
Yang H,Liu H,Li X,Pan H,Li Z,Wang J,Zheng Zdoi
10.3109/03008207.2014.996702subject
Has Abstractpub_date
2015-01-01 00:00:00pages
281-7issue
4eissn
0300-8207issn
1607-8438journal_volume
56pub_type
杂志文章abstract::Sonic hedgehog (Shh) expression is highly localized to the epithelium at the future sites of tooth development. This restricted expression suggests that inhibition of Shh in areas where teeth do not form may be an important mechanism in tooth germ localization. Recently, Hip, a putative vertebrate antagonist of Shh, h...
journal_title:Connective tissue research
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abstract::The purpose of this investigation is to evaluate enamel thickness in extant and extinct hominoids. The material used in this study spans the evolutionary history of this group, from 20 million years ago to the present. The objectives of this investigation are to test three hypotheses: (1) the Loading Hypothesis: loadi...
journal_title:Connective tissue research
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journal_title:Connective tissue research
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journal_title:Connective tissue research
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journal_title:Connective tissue research
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journal_title:Connective tissue research
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journal_title:Connective tissue research
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journal_title:Connective tissue research
pub_type: 杂志文章
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更新日期:2017-09-01 00:00:00
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journal_title:Connective tissue research
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journal_title:Connective tissue research
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abstract:AIM OF THE STUDY:To further elucidate the pathogenesis of systemic sclerosis (SSc) an experimental avian model was used. The University of California at Davis line 200 (UCD-200) chickens spontaneously develop a SSc-like disease that has most features of human SSc with vascular effects, inflammation, autoimmunity, and f...
journal_title:Connective tissue research
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abstract::The effect of I- and C1- on the enzymatic degradation of elastin pancreatic elastase has been studied. At low halide concentrations both ions show a marked stimulation of elastolysis, I- being significantly more effective than Cl-. Kinetic plots of enzyme activity indicate that anions enhance the susceptibility of the...
journal_title:Connective tissue research
pub_type: 杂志文章
doi:10.3109/03008207809152616
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journal_title:Connective tissue research
pub_type: 杂志文章
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journal_title:Connective tissue research
pub_type: 杂志文章
doi:
更新日期:2002-01-01 00:00:00
abstract::Epithelial-mesenchymal interactions are required for tissue growth and gene expression patterns during odontogenesis. We showed previously that Sonic hedgehog (SHH) is detectable in both dental epithelium and mesenchyme, while Shh transcripts are present in dental epithelium only, suggesting that SHH functions as an a...
journal_title:Connective tissue research
pub_type: 杂志文章
doi:
更新日期:2003-01-01 00:00:00
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journal_title:Connective tissue research
pub_type: 杂志文章,评审
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更新日期:2008-01-01 00:00:00
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journal_title:Connective tissue research
pub_type: 杂志文章
doi:10.3109/03008208909043895
更新日期:1989-01-01 00:00:00
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journal_title:Connective tissue research
pub_type: 杂志文章
doi:10.3109/03008207.2011.604452
更新日期:2012-01-01 00:00:00
abstract::Conditions were established to stimulate human gingival fibroblast explant cultures to synthesize milligram quantities of the metalloproteinase proenzymes, prostromelysin and procollagenase. To stimulate enzyme production, cells were treated with 1 nM recombinant human IL-1 beta for approximately 7 days under serum fr...
journal_title:Connective tissue research
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journal_title:Connective tissue research
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journal_title:Connective tissue research
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journal_title:Connective tissue research
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journal_title:Connective tissue research
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journal_title:Connective tissue research
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journal_title:Connective tissue research
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journal_title:Connective tissue research
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journal_title:Connective tissue research
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更新日期:2020-05-01 00:00:00