Human Gene Set: ZHANG_GATA6_TARGETS_UP

For the Mouse gene set with the same name, see ZHANG_GATA6_TARGETS_UP

Standard name ZHANG_GATA6_TARGETS_UP
Systematic name M1777
Brief description Genes up-regulated after cre-lox knockout of GATA6 [GeneID=2627] in airway epithelium.
Full description or abstract Epithelial organs, including the lung, are known to possess regenerative abilities through activation of endogenous stem cell populations, but the molecular pathways regulating stem cell expansion and regeneration are not well understood. Here we show that Gata6 regulates the temporal appearance and number of bronchioalveolar stem cells (BASCs) in the lung, its absence in Gata6-null lung epithelium leading to the precocious appearance of BASCs and concurrent loss in epithelial differentiation. This expansion of BASCs was the result of a pronounced increase in canonical Wnt signaling in lung epithelium upon loss of Gata6. Expression of the noncanonical Wnt receptor Fzd2 was downregulated in Gata6 mutants and increased Fzd2 or decreased beta-catenin expression rescued, in part, the lung epithelial defects in Gata6 mutants. During lung epithelial regeneration, canonical Wnt signaling was activated in the niche containing BASCs and forced activation of Wnt signaling led to a large increase in BASC numbers. Moreover, Gata6 was required for proper lung epithelial regeneration, and postnatal loss of Gata6 led to increased BASC expansion and decreased differentiation. Together, these data demonstrate that Gata6-regulated Wnt signaling controls the balance between progenitor expansion and epithelial differentiation required for both lung development and regeneration.
Collection C2: Curated
      CGP: Chemical and Genetic Perturbations
Source publication Pubmed 18536717   Authors: Zhang Y,Goss AM,Cohen ED,Kadzik R,Lepore JJ,Muthukumaraswamy K,Yang J,DeMayo FJ,Whitsett JA,Parmacek MS,Morrisey EE
Exact source Fig 4a
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Source species Mus musculus
Contributed by Jessica Robertson (MSigDB Team)
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Version history 3.1: First introduced

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