Unknown

Dataset Information

0

TP53 supports basal-like differentiation of mammary epithelial cells by preventing translocation of deltaNp63 into nucleoli.


ABSTRACT: Multiple observations suggest a cell type-specific role for TP53 in mammary epithelia. We developed an in vitro assay, in which primary mouse mammary epithelial cells (mMECs) progressed from lumenal to basal-like phenotypes based on expression of Krt18 or ?Np63, respectively. Such transition was markedly delayed in Trp53(-/-) mMECs suggesting that Trp53 is required for specification of the basal, but not lumenal cells. Evidence from human basal-like cell lines suggests that TP53 may support the activity of ?Np63 by preventing its translocation from nucleoplasm into nucleoli. In human lumenal cells, activation of TP53 by inhibiting MDM2 or BRCA1 restored the nucleoplasmic expression of ?Np63. Trp53(-/-) mMECs eventually lost epithelial features resulting in upregulation of MDM2 and translocation of ?Np63 into nucleoli. We propose that TP63 may contribute to TP53-mediated oncogenic transformation of epithelial cells and shed light on tissue- and cell type-specific biases observed for TP53-related cancers.

SUBMITTER: Munne PM 

PROVIDER: S-EPMC3983616 | biostudies-literature | 2014 Apr

REPOSITORIES: biostudies-literature

altmetric image

Publications

TP53 supports basal-like differentiation of mammary epithelial cells by preventing translocation of deltaNp63 into nucleoli.

Munne Pauliina M PM   Gu Yuexi Y   Tumiati Manuela M   Gao Ping P   Koopal Sonja S   Uusivirta Sanna S   Sawicki Janet J   Wei Gong-Hong GH   Kuznetsov Sergey G SG  

Scientific reports 20140411


Multiple observations suggest a cell type-specific role for TP53 in mammary epithelia. We developed an in vitro assay, in which primary mouse mammary epithelial cells (mMECs) progressed from lumenal to basal-like phenotypes based on expression of Krt18 or ΔNp63, respectively. Such transition was markedly delayed in Trp53(-/-) mMECs suggesting that Trp53 is required for specification of the basal, but not lumenal cells. Evidence from human basal-like cell lines suggests that TP53 may support the  ...[more]

Similar Datasets

| S-EPMC3878224 | biostudies-literature
| S-EPMC8007166 | biostudies-literature
| S-EPMC10705482 | biostudies-literature
| S-EPMC7278423 | biostudies-literature
| S-EPMC1413978 | biostudies-literature
| S-EPMC4123470 | biostudies-literature
| S-EPMC4293134 | biostudies-literature
| S-EPMC3922990 | biostudies-literature
| S-EPMC5256977 | biostudies-other
| S-EPMC7135929 | biostudies-literature