Title : Iron-induced Local Complement Component 3 (C3) Up-regulation via Non-canonical Transforming Growth Factor (TGF)-β Signaling in the Retinal Pigment Epithelium.

Pub. Date : 2015 May 8

PMID : 25802332






9 Functional Relationships(s)
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1 Iron-induced Local Complement Component 3 (C3) Up-regulation via Non-canonical Transforming Growth Factor (TGF)-beta Signaling in the Retinal Pigment Epithelium. Iron complement C3 Homo sapiens
2 In this study, we investigated the molecular mechanisms by which complement component 3 (C3), a central protein in the complement cascade, is up-regulated by iron in RPE cells. Iron complement C3 Homo sapiens
3 In this study, we investigated the molecular mechanisms by which complement component 3 (C3), a central protein in the complement cascade, is up-regulated by iron in RPE cells. Iron complement C3 Homo sapiens
4 Modulation of TGF-beta signaling, involving ERK1/2, SMAD3, and CCAAT/enhancer-binding protein-delta, is responsible for iron-induced C3 expression. Iron complement C3 Homo sapiens
5 Pharmacologic inhibition of either ERK1/2 or SMAD3 phosphorylation decreased iron-induced C3 expression levels. Iron complement C3 Homo sapiens
6 Knockdown of SMAD3 blocked the iron-induced up-regulation and nuclear accumulation of CCAAT/enhancer-binding protein-delta, a transcription factor that has been shown previously to bind the basic leucine zipper 1 domain in the C3 promoter. Iron complement C3 Homo sapiens
7 We show herein that mutation of this domain reduced iron-induced C3 promoter activity. Iron complement C3 Homo sapiens
8 In vivo studies support our in vitro finding of iron-induced C3 up-regulation. Iron complement C3 Homo sapiens
9 The molecular events in the iron-C3 pathway represent therapeutic targets for AMD or other diseases exacerbated by iron-induced local complement dysregulation. Iron complement C3 Homo sapiens