Abstract

Transcriptional activation of target genes represents an important component of the tumour-suppressor function of p53 and provides a functional link between p53 and various growth-regulatory processes, including cell cycle progression (p21/WAF1), DNA repair (GADD45) and apoptosis (bax). Here we use a differential cloning approach to identify the gene encoding insulin-like growth factor binding protein 3 (IGF-BP3) as a novel p53-regulated target gene. Induction of IGF-BP3 gene expression by wild-type but not mutant p53 is associated with enhanced secretion of an active form of IGF-BP3 capable of inhibiting mitogenic signalling by the insulin-like growth factor IGF-1. Our results indicate that IGF-BP3 may link p53 to potential novel autocrine/paracrine signalling pathways and to processes regulated by or dependent on IGF(s), such as cellular growth, transformation and survival.

Keywords

Autocrine signallingParacrine signallingGrowth factorCell biologyBiologyGadd45Insulin-like growth factorGeneCell growthRegulation of gene expressionCell cycleCell cycle checkpointReceptorGenetics

MeSH Terms

Base SequenceBinding SitesCell DivisionCell LineCloningMolecularDNADoxorubicinGene Expression RegulationGrowth InhibitorsHumansInsulin-Like Growth Factor Binding Protein 3Insulin-Like Growth Factor IMolecular Sequence DataSignal TransductionTumor CellsCulturedTumor Suppressor Protein p53Ultraviolet Rays

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Publication Info

Year
1995
Type
article
Volume
377
Issue
6550
Pages
646-649
Citations
877
Access
Closed

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Cite This

Leonard Buckbinder, Randy Talbott, Susana Velasco-Miguel et al. (1995). Induction of the growth inhibitor IGF-binding protein 3 by p53. Nature , 377 (6550) , 646-649. https://doi.org/10.1038/377646a0

Identifiers

DOI
10.1038/377646a0
PMID
7566179

Data Quality

Data completeness: 81%