Transcriptomics,Multiomics

Dataset Information

3

Multiple roles for Grainyheadlike transcription factors in the establishment and maintenance of human mucociliary airway epithelium


ABSTRACT: The airways of the human lung are lined by an epithelium made up of ciliated and secretory luminal cells and undifferentiated p63+ Krt5+ basal cells. The integrity of this epithelium and its ability to act as a selective barrier are critical for normal lung function. In other epithelia there is evidence that transcription factors of the evolutionarily conserved grainyheadlike (GRHL) family play key roles in co-ordinating the expression of numerous proteins required for epithelial morphogenesis, differentiation, remodeling and repair. However, little is known about their function in the adult lung. Here, we focus on the role of GRHL2 in primary human bronchial epithelial (HBE) cells, using either shRNA or a dominant negative protein (DN-GRHL2) to inhibit its function. We follow changes in epithelial phenotype, and in gene transcription using RNA-seq or microarray analysis, both in undifferentiated basal cells and in cells differentiating in air-liquid interface culture into a mucociliary epithelium with transepithelial electrical resistance. We identify several hundreds of genes that are directly or indirectly regulated by GRHL2. Using ChIP-seq to map sites of GRHL2 binding in the basal cells we identify 7,687 potential primary targets, and confirm that GRHL2 binding is strongly enriched near GRHL-regulated genes. Different subsets of the large cohort of potential GRHL2 targets appear to be active in basal and differentiated cells. Taken together, the results strongly support the hypothesis that GRHL2 plays a key role in regulating many physiological functions of human airway epithelium, including those involving cell adhesion, polarity and morphogenesis. Frozen primary human bronchial epithelial (HBE) cells were obtained from three donors. Passage 2 cells at 40% confluence were infected with H2B-GFP or DN-GRHL2 lentivirus and 1 mg/ml puromycin added 48 h later. At confluence, Doxycycline 0.5 mg/ml was added for 24 h. RNA-seq was performed on all six samples, as well as samples from two donors that were not infected.

ORGANISM(S): Homo sapiens  

SUBMITTER: Yan Xue   Timothy E Reddy  Xia Gao  Kimberly M Newberry  Christopher M Vockley  Brigid L Hogan  Florencia Pauli  Scott H Randell 

PROVIDER: E-GEOD-44718 | ArrayExpress | 2013-05-07

SECONDARY ACCESSION(S): SRP018883GSE44718PRJNA191084

REPOSITORIES: GEO, ArrayExpress, ENA

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Publications

Evidence for multiple roles for grainyhead-like 2 in the establishment and maintenance of human mucociliary airway epithelium.[corrected].

Gao Xia X   Vockley Christopher M CM   Pauli Florencia F   Newberry Kimberly M KM   Xue Yan Y   Randell Scott H SH   Reddy Timothy E TE   Hogan Brigid L M BL  

Proceedings of the National Academy of Sciences of the United States of America 20130520 23


Most of the airways of the human lung are lined by an epithelium made up of ciliated and secretory luminal cells and undifferentiated basal progenitor cells. The integrity of this epithelium and its ability to act as a selective barrier are critical for normal lung function. In other epithelia, there is evidence that transcription factors of the evolutionarily conserved grainyheadlike (GRHL) family play key roles in coordinating multiple cellular processes required for epithelial morphogenesis,  ...[more]

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