Concept

P53

Related publications (119)

Multiple roles of Notch signaling in the regulation of epidermal development

Recent studies have shown that Notch signaling plays an important role in epidermal development, but the underlying molecular mechanisms remain unclear. Here, by integrating loss- and gain-of-function studies of Notch receptors and Hes1, we describe molecu ...

2008

Cells with defective p53-p21-pRb pathway are susceptible to apoptosis induced by p84N5 via caspase-6

Peter Martin Beard

Adeno-associated virus (AAV) infection triggers a DNA damage response in the cell. This response is not induced by viral proteins but by virtue of the structure of AAV ssDNA being recognized by the cell as damaged DNA. The consequence of this is the killin ...

2007

Chk1 instability is coupled to mitotic cell death of p53-deficient cells in response to virus-induced DNA damage signaling

Peter Martin Beard, Michail Fragkos

Adeno-associated virus (AAV) DNA, by mimicking a stalled replication fork, provokes a DNA damage response that can arrest cells in the G2/M phase of the cell-cycle. This response depends strictly on DNA damage signaling kinases ATR and Chk1. Here, we used ...

2007

Tie2-expressing monocytes and tumor angiogenesis: regulation by hypoxia and angiopoietin-2

Michele De Palma

Recent findings indicate that tumor-associated macrophages are important drivers of tumor angiogenesis. Here, we review the essential role played by Tie2-expressing monocytes (TEM) in this phenomenon. TEMs are present in human blood and tumors and their el ...

American Association for Cancer Research2007

Mutant huntingtin's effects on striatal gene expression in mice recapitulate changes observed in human Huntington's disease brain and do not differ with mutant huntingtin length or wild-type huntingtin dosage

Darlene Goldstein, Mauro Delorenzi, Thierry Sengstag

To test the hypotheses that mutant huntingtin protein length and wild-type huntingtin dosage have important effects on disease-related transcriptional dysfunction, we compared the changes in mRNA in seven genetic mouse models of Huntington's disease (HD) a ...

Oxford University Press2007

Skin epidermis lacking the c-myc gene is resistant to Ras-driven tumorigenesis but can reacquire sensitivity upon additional loss of the p21Cip1 gene

Peter Martin Beard, Sandra Eloise Kjeldsen, Christelle Dubey

The target gene(s) required for Myc-mediated tumorigenesis are still elusive. Here we show that while endogenous c-Myc is surprisingly dispensable for skin homeostasis and TPA-induced hyperplasia, c-Myc-deficient epidermis is resistant to Ras-mediated DMBA ...

2006

Increased Wnt signaling triggers oncogenic conversion of human breast epithelial cells by a Notch-dependent mechanism

Cathrin Brisken, Ayyakkannu Ayyanan, Maryse Fiche

Wnt and Notch signaling have long been established as strongly oncogenic in the mouse mammary gland. Aberrant expression of several Wnts and other components of this pathway in human breast carcinomas has been reported, but evidence for a causative role in ...

2006

The double life of UPF1 in RNA and DNA stability pathways

Joachim Lingner

The DNA and RNA helicase UPF1 is well known for its central role in Nonsense Mediated RNA Decay (NMD), which promotes degradation of mRNAs containing premature stop codons. However, we have recently demonstrated that human UPF1 is also essential for DNA re ...

2006

Destabilization of interleukin-6 mRNA requires a putative RNA stem-loop structure, an AU-rich element, and the RNA-binding protein AUF1

Lukas Kühn, Barbara Grisoni-Neupert

Interleukin-6 mRNA is unstable and degraded with a half-life of 30 min. Instability determinants can entirely be attributed to the 3' untranslated region. By grafting segments of this region to stable green fluorescent protein mRNA and subsequent scanning ...

2006

p21WAF1/Cip1 is a negative transcriptional regulator of Wnt4 expression downstream of Notch1 activation

Cathrin Brisken

In keratinocytes, the cyclin/CDK inhibitor p21(WAF1/Cip1) is a direct transcriptional target of Notch1 activation; loss of either the p21 or Notch1 genes expands stem cell populations and facilitates tumor development. The Notch1 tumor-suppressor function ...

2005

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