2000
DOI: 10.1002/1529-0131(200009)43:9<2091::aid-anr21>3.0.co;2-c
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Mechanotransduction via integrins and interleukin‐4 results in altered aggrecan and matrix metalloproteinase 3 gene expression in normal, but not osteoarthritic, human articular chondrocytes

Abstract: Mechanical stimulation of human articular chondrocytes in vitro results in increased levels of aggrecan mRNA and decreased levels of MMP-3 mRNA. The transduction process involves integrins, stretch-activated ion channels, and IL-4. This chondroprotective response is absent in chondrocytes from OA cartilage. Abnormalities of mechanotransduction leading to aberrant chondrocyte activity in diseased articular cartilage may be important in the progression of OA.

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Cited by 209 publications
(131 citation statements)
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“…The control of MMP-3 expression in vivo is complex and not well understood, and could be subject to modulation by other transcription or post-transcription factors, such as cytokines (27,28); one of its polymorphisms is located within the interleukin-1 responsive element for several transcriptional regulators (29).…”
Section: A/6a Polymorphism Of Mmp-3mentioning
confidence: 99%
“…The control of MMP-3 expression in vivo is complex and not well understood, and could be subject to modulation by other transcription or post-transcription factors, such as cytokines (27,28); one of its polymorphisms is located within the interleukin-1 responsive element for several transcriptional regulators (29).…”
Section: A/6a Polymorphism Of Mmp-3mentioning
confidence: 99%
“…The initial inducers of cartilage catabolism in OA have not been identified. Potential stimuli include mechanical stress [50,51], and degradation products of ECM components including fibronectin fragments which stimulate production of matrix-degrading proteases [52][53][54][55]. IL-1 is a prototypical proinflammatory cytokine implicated in OA cartilage degradation which stimulates production of matrix metalloproteinases (MMPs).…”
Section: Cytokines Oxidative Damage and Chemokinesmentioning
confidence: 99%
“…Post-traumatic causes of OA Injurious and excessive mechanical stress can also result in depletion of proteoglycans and damage the collagen network [50,51]. Mechanical factors leading to joint damage can be viewed as factors that either compromise joint protection or excessively load the joint [76,77].…”
Section: 4mentioning
confidence: 99%
“…Millward-Sadler et al (22) applied hydrostatic pressure to chondrocyte monolayers at 0.33 Hz for 20 min in a manner that induced strain on the culture dish and plated cells (pressure-induced strain (PIS)). They observed an increase in aggrecan mRNA and a decrease in MMP-3 mRNA within 1 h following stimulation, with a return to base-line levels by 24 h. In a single experiment applying intermittent hydrostatic pressure to human chondrosarcoma cells, changes in the expression of 51 genes were measured by cDNA array technology without widespread change in RNA stability (23), indicating that many genes may be influenced by mechanical stimuli.…”
mentioning
confidence: 99%
“…Application of intermittent PIS to chondrocytes induced ␣ 5 ␤ 1 integrin activation of interleukin-4, which caused cell hyperpolarization via intracellular calcium release (24). Inhibition of interleukin-4 suppressed the up-regulation of aggrecan gene expression observed due to PIS (22). Intracellular calcium release, cAMP, and the phospholipase C pathway have been implicated for aggrecan gene up-regulation in response to static compression in cartilage explants (25).…”
mentioning
confidence: 99%