Quick Search:

uzh logo
Browse by:

Zurich Open Repository and Archive

Maintenance: Tuesday, 5.7.2016, 07:00-08:00

Maintenance work on ZORA and JDB on Tuesday, 5th July, 07h00-08h00. During this time there will be a brief unavailability for about 1 hour. Please be patient.

Hegi, M E; Klein, M A; Rüedi, D; Chène, P; Hamou, M F; Aguzzi, A (2000). p53 transdominance but no gain of function in mouse brain tumor model. Cancer Research, 60(11):3019-3024.

Full text not available from this repository.


Although p53 mutations in tumors typically result in loss of transactivation of p53 target genes some mutants display gain-of-function activity. The latter has important implications for the design of rational cancer therapy. We previously described a germ-line p53 mutation (deletion of codon 236, Y236delta) associated with a familial brain tumor syndrome. To determine whether this tissue-specific tumor predisposition reflects a gain-of-function activity of Y236delta or an effect of genetic background we have developed a mouse brain tumor model. Primary neuroectodermal cells deficient for p53 (+/- or -/-) and transduced with Y236delta using a retroviral vector were transplanted into the brain of adult wild-type mice. This neurografting paradigm circumvents the problem of early lethal tumors at extracerebral sites associated with germ-line p53 deficiency. Brain tumors arising in this mouse model were highly invasive, reflecting an important feature of the human disease. Tumors arose from p53+/- cells only when transduced with Y236delta. In keeping with in vitro data showing that Y236delta has dominant-negative activity, these tumors retained the endogenous wild-type p53 allele but accumulated high levels of Y236delta. However, the presence of Y236delta in transplanted p53-/- cells had no effect on the tumor frequency, 15% versus 27% without the mutant. In conclusion, Y236delta is transdominant but exerts no gain-of-function activity mediating a more penetrant tumor phenotype.


5 citations in Web of Science®
6 citations in Scopus®
Google Scholar™

Additional indexing

Item Type:Journal Article, refereed
Communities & Collections:04 Faculty of Medicine > University Hospital Zurich > Institute of Neuropathology
Dewey Decimal Classification:570 Life sciences; biology
610 Medicine & health
Date:1 June 2000
Deposited On:11 Feb 2008 12:26
Last Modified:05 Apr 2016 12:21
Publisher:American Association for Cancer Research
Related URLs:http://cancerres.aacrjournals.org/cgi/content/full/60/11/3019
PubMed ID:10850451

Users (please log in): suggest update or correction for this item

Repository Staff Only: item control page