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NFIB: A Governor of Epithelial-Melanocyte Stem Cell Behaviour in a Shared Niche

ABSTRACT: To identify direct NFIB target genes in HFSCs, we performed chromatin immunoprecipitation and deep sequencing (ChIP-seq) analysis using FACS-isolated HFSCs. Two independent NFIB ChIP-seq experiments were conducted.

ORGANISM(S): Mus musculus

SUBMITTER: Chiung-Ying Chang

PROVIDER: E-GEOD-42900 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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NFIB is a governor of epithelial-melanocyte stem cell behaviour in a shared niche.

Chang Chiung-Ying CY Pasolli H Amalia HA Giannopoulou Eugenia G EG Guasch Géraldine G Gronostajski Richard M RM Elemento Olivier O Fuchs Elaine E

Nature 20130206 7439

Adult stem cells reside in specialized niches where they receive environmental cues to maintain tissue homeostasis. In mammals, the stem cell niche within hair follicles is home to epithelial hair follicle stem cells and melanocyte stem cells, which sustain cyclical bouts of hair regeneration and pigmentation. To generate pigmented hairs, synchrony is achieved such that upon initiation of a new hair cycle, stem cells of each type activate lineage commitment. Dissecting the inter-stem-cell crosst ...[more]

PMID: 23389444

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Architectural niche organization by LHX2 is linked to hair follicle stem cell function

Project description:To identify direct LHX2 target genes in HFSCs, we performed chromatin immunoprecipitation and deep sequencing (ChIP-seq) analysis using FACS-isolated HFSCs. Three independent LHX2 ChIP-seq experiments were conducted.

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NFIB: A Governor of Epithelial-Melanocyte Stem Cell Behaviour in a Shared Niche

Project description:To identify direct NFIB target genes in HFSCs, we performed chromatin immunoprecipitation and deep sequencing (ChIP-seq) analysis using FACS-isolated HFSCs.

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Nfatc1 Orchestrates Aging in Hair Follicle Stem Cells

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Identifying NFIB target genes in mammalian cells

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Paracrine TGFß Signaling Counterbalances BMP-Mediated Repression in Hair Follicle Stem Cell Activation

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Hierarchy within the mammary STAT5-driven Wap super-enhancer

Project description:Super-enhancers comprise of dense transcription factor platforms highly enriched for active chromatin marks. A paucity of functional data led us to investigate their role in the mammary gland, an organ characterized by exceptional gene regulatory dynamics during pregnancy. ChIP-Seq for the master regulator STAT5, the glucocorticoid receptor, H3K27ac and MED1, identified 440 mammary-specific super-enhancers, half of which were associated with genes activated during pregnancy. We interrogated the Wap super-enhancer, generating mice carrying mutations in STAT5 binding sites within its three constituent enhancers. Individually, only the most distal site displayed significant enhancer activity. However, combinatorial mutations showed that the 1,000-fold gene induction relied on all enhancers. Disabling the binding sites of STAT5, NFIB and ELF5 in the proximal enhancer incapacitated the entire super-enhancer, suggesting an enhancer hierarchy. The identification of mammary-specific super-enhancers and the mechanistic exploration of the Wap locus provide insight into the complexity of cell-specific and hormone-regulated genes. ChIP-Seq for STAT5A, GR, H3K27ac, MED1, NFIB, ELF5, RNA Pol II, and H3K4me3 in wild type (WT) mammary tissues at day one of lactation (L1), and ChIP-Seq for STAT5A, GR, H3K27ac, MED1, NFIB, ELF5, and H3K4me3 in WT mammary tissues at day 13 of pregnancy (p13). ChIP-Seq for STAT5A, GR, H3K27a in Wap-delE1a, -delE1b, -delE1c, -delE2 and -delE3 mutant mammary tissues at L1, and ChIP-Seq for NFIB and ELF5 in Wap-delE1b and -delE1c mutant mammary tissues at L1. ChIP-Seq for H3K4me3 in mammary-epthelial cells at p13 and L1. DNase-seq in WT mammary tissues at L1 and DNase-seq in Wap-delE1a, -delE1c, and -delE3 mutant mammary tissues at L1.

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