The Stat6-regulated KRAB domain zinc finger protein Zfp157 regulates the balance of lineages in mammary glands and compensates for loss of Gata-3.

Abstract:

:Lineage commitment studies in mammary glands have focused on identifying cell populations that display stem or progenitor properties. However, the mechanisms that control cell fate have been incompletely explored. Herein we show that zinc finger protein 157 (Zfp157) is required to establish the balance between luminal alveolar pStat5- and Gata-3-expressing cells in the murine mammary gland. Using mice in which the zfp157 gene was disrupted, we found that alveologenesis was accelerated concomitantly with a dramatic skewing of the proportion of pStat5-expressing cells relative to Gata-3⁺ cells. This suppression of the Gata-3⁺ lineage was associated with increased expression of the inhibitor of helix-loop-helix protein Id2. Surprisingly, Gata-3 becomes dispensable in the absence of Zfp157, as mice deficient for both Zfp157 and Gata-3 lactate normally, although the glands display a mild epithelial dysplasia. These data suggest that the luminal alveolar compartment of the mammary gland is comprised of a number of distinct cell populations that, although interdependant, exhibit considerable cell fate plasticity.

journal_name

Genes Dev

journal_title

Genes & development

authors

Oliver CH,Khaled WT,Frend H,Nichols J,Watson CJ

doi

10.1101/gad.184051.111

subject

Has Abstract

pub_date

2012-05-15 00:00:00

pages

1086-97

issue

10

eissn

0890-9369

issn

1549-5477

pii

26/10/1086

journal_volume

26

pub_type

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