Project description:Although Thyroid transcription factor-1 (TTF-1, encoded by NKX2-1 gene) is highly expressed in small cell lung carcinoma (SCLC) and lung adenocarcinoma (LADC), difference in the functional roles of TTF-1 between SCLC and LADC remains to be elucidated. The aim of this study was to clarify the differences in the TTF-1 binding regions and functional roles in SCLC and LADC. Employing chromatin immunoprecipitation-sequencing (ChIP-seq) , here we compared the genome-wide TTF-1-binding profiles and the TTF-1-mediated transcriptional programs in a SCLC and a LADC cell lines. We also investigated ASCL1 binding regions in SCLC cells. To validate whether the changes in TTF-1 or ASCL1 binding to the genome indeed resulted in changes in target gene expression, we performed RNA-seq transcriptome analyses in H209 cells with TTF-1 or ASCL1 knockdown. Data were also obtained from H441 cells transfected with TTF-1 siRNAs.

2019-11-30 | GSE129340 | GEO

TTF-1/NKX2-1 and ASCL1 binding regions in a small cell lung carcinoma cell line, NCI-H209

2019-11-30 | GSE129312 | GEO

Differential gene expression by NKX2-1 suppression in NCI-H2009 cells

Project description:The NKX2-1 transcription factor, a regulator of normal lung development, is the most significantly amplified gene in human lung adenocarcinoma. To better understand how genomic alterations of NKX2-1 drive tumorigenesis, we generated an expression signature associated with NKX2-1 amplification in human lung adenocarcinoma, and analyzed DNA binding sites of NKX2-1 by genome-wide chromatin immunoprecipitation from NKX2-1-amplified human lung adenocarcinoma cell lines. Combining these expression and cistromic analyses identified LMO3, itself encoding a transcription regulator, as a candidate direct transcriptional target of NKX2-1, in addition to consensus binding motifs including a nuclear hormone receptor signature and a Forkhead box motif in NKX2-1-bound sequences. RNA interference analysis of NKX2-1-amplified cells compared to non-amplified cells demonstrated that LMO3 mediates cell proliferation downstream of NKX2-1; cistromic analysis that NKX2-1 may cooperate with FOXA1. Our findings provide new insight into the transcriptional regulatory network of NKX2-1 and suggest that LMO3 is a transducer of lineage specific cell survival of NKX2-1-amplified lung adenocarcinomas. NCI-H2009 cells with stable expression of either pLKO-Tet-Op-shGFP (n=4) or pLKO-Tet-Op-shNKX2-1 (pooled population; n=3 and a clone; n=3) were treated with 50ng/ml of doxycyline for 48 hours. Total RNA was extracted, gene expression profiling was performed and differential gene expression between shGFP and shNKX2-1 was analyzed to determine the effects by suppression of NKX2-1 in NCI-H2009 cells.

2013-04-15 | E-GEOD-40270 | biostudies-arrayexpress

RNA-seq transcriptome analysis in NCI-H209 and NCI-H441 cells transfected with TTF-1/NKX2-1 or ASCL1 siRNAs.

Project description:RNA-seq transcriptome analysis in NCI-H209 and NCI-H441 cells transfected with TTF-1/NKX2-1 or ASCL1 siRNAs.

| PRJNA530975 | ENA

Transcriptome sequencing analysis for NCI-H209 lung tumor cells conditioned by human brain microvascular endothelial cells

Project description:Endothelial cells of blood vessel playing a key role in the metastasis of tumor cells particularly the brain microvascular endothelial cells in the brain-tropic metastasis of lung tumor cells. Currently, studies towards the influence contributed by tumor cells to the alteration of endothelial cells have been extensively conducted by contrast studies for the alteration of gene-expression signature of tumor cells under the influence of endothelial cells remains poorly characterized, thus in this study the transcriptome of the human small-cell lung cancer cell NCI-H209 was sequenced via RNA-Seq after conditioned by human brain microvascular endothelial cell (HBMEC) for characterizing the alteration of gene-expression signature.

2021-03-16 | GSE157219 | GEO

Differential gene expression by NKX2-1 suppression in NCI-H2009 cells

2013-04-15 | GSE40270 | GEO

Genome-wide mapping of NKX2-1 and SPDEF binding sites in A549 lung carcinoma cells by ChIP-seq

Project description:ChIP-seq was performed to identify the binding regions of SPDEF and NKX2-1 in A549 lung carcinoma cells expressing NKX2-1 and SPDEF.

2017-03-02 | GSE86957 | GEO

Genome-wide binding of Nkx2-5

Project description:Genome-wide binding of Nkx2-5

2018-10-30 | GSE17807 | GEO