ArticleMolecular biotechnology2006
Epidermal growth factor receptor-induced activator protein 1 activity controls density-dependent growth inhibition in normal rat kidney fibroblasts.
Article in Molecular biotechnology, 2006. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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0 citing papers in PubMed, 1 citations in OpenAlex.
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7 authors at 3 institutions in 2 countries.
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Abstract
Density-dependent growth inhibition secures tissue homeostasis. Dysfunction of the mechanisms, which regulate this type of growth control is a major cause of neoplasia. In confluent normal rat kidney (NRK) fibroblasts, epidermal growth factor (EGF) receptor levels decline, ultimately rendering these cells irresponsive to EGF. Using an activator protein (AP)-1 sensitive reporter construct, we show that AP-1 activity is strongly decreased in density-arrested NRK cells, but is restored after relaxation of densitydependent growth inhibition by removing neighboring cells. EGF could not induce AP-1 activity or S-phase entry in density-arrested cells, but could do so after pretreatment with retinoic acid, which enhances EGF receptor expression. Our results support a model in which the EGF receptor regulates density-dependent growth control in NRK fibroblasts, which is reflected by EGF-induced mitogenic signaling and consequent AP-1 activity.
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