BHLHE40 modulates gene transcription in breast cancer cells exposed to hypoxia and low glucose
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PROVIDER: PRJNA419652 | ENA |
REPOSITORIES: ENA
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Project description:Knockdown of BHLHE40 expression significantly reduced primary tumor growth and spontaneous lung metastasis in an orthotopic xenograft model of human breast cancer. Gene expression analysis implicated a role of BHLHE40 in hypoxia-induced exosomic secretion of Heparin Binding Epidermal Growth Factor HBEGF, which promotes cell survival and invasion. BHLHE40 induces HBEGF transcription by blocking DNA binding of HDAC1 and HDAC2.
2018-10-30 | GSE107300 | GEO
Project description:To assess the impact of hypoxia on global gene expression of beta cells, we performed bulk RNA-seq on mouse islets, human islets and MIN6 cells. Bhlhe40 was transcriptional repressor which was highly induced by hypoxia in beta cells. Thus, we established Bhlhe40 overexpressing MIN6 cells and performed RNA-seq to identify the targets of Bhlhe40.
2023-05-01 | GSE202603 | GEO
Project description:Microarray data on TH17 cells from Bhlhe40-GFP reporter mice We used microarrays to detail the global programme of gene expression in polarized Bhlhe40-GFPneg and Bhlhe40-GFPpos TH17 cells Purified naïve CD4 T cells from spleen were polarized under TH17 condition in vitro. On day 4, cells were stimulated with PMA and ionomycin, and sorted by their Bhlhe40-GFP expression prior to microarray analysis
2016-01-04 | E-GEOD-75407 | biostudies-arrayexpress
Project description:BHLHE40 is key hypoxia-induced transcriptional repressor in beta cells
| PRJNA836763 | ENA
Project description:Microarray data on TH17 cells from Bhlhe40-GFP reporter mice We used microarrays to detail the global programme of gene expression in polarized Bhlhe40-GFPneg and Bhlhe40-GFPpos TH17 cells
2016-01-04 | GSE75407 | GEO
Project description:BHLHE40 is a basic helix-loop-helix transcription factor that is involved in multiple cell activities including differentiation, cell cycle, and epithelial-to-mesenchymal transition. While there is growing evidence to support the functions of BHLHE40 in energy metabolism, little is known about the mechanism. In this study, we found that BHLHE40 expression was downregulated in cases of endometrial cancer of higher grade and advanced disease. Knockdown of BHLHE40 in endometrial cancer cells resulted in suppressed oxygen consumption and enhanced extracellular acidification. Suppressed pyruvate dehydrogenase (PDH) activity and enhanced lactated dehydrogenase (LDH) activity was observed in the knockdown cells. Knockdown of BHLHE40 also led to dephosphorylation of AMPKα Thr172 and enhanced phosphorylation of PDHA1 Ser293 and LDHA Tyr10. These results suggested that BHLHE40 modulates PDH and LDH activity by regulating the phosphorylation status of PDHA1 and LDHA. We found that BHLHE40 enhanced AMPKα phosphorylation by directly suppressing the transcription of an AMPKα-specific phosphatase, PPM1F. Our immunohistochemical study showed that the expression of BHLHE40, PPM1F, and phosphorylated AMPKα correlated with the prognosis of endometrial cancer patients. Because AMPK is a central regulator of energy metabolism in cancer cells, targeting the BHLHE40‒PPM1F‒AMPK axis may represent a strategy to control cancer development.
2023-09-04 | GSE241941 | GEO
Project description:NK cells represent a cellular component of the mammalian innate immune system, and mount rapid responses against viral infection, including the secretion of the potent anti-viral effector cytokine IFN-g. Following mouse cytomegalovirus (MCMV) infection, Bhlhe40 was the most highly induced transcription factor in NK cells among the basic helix-loop-helix family. Bhlhe40 upregulation in NK cells depended upon IL-12 and IL-18 signals, with the promoter of Bhlhe40 enriched for STAT4 and the permissive histone H3K4me3, and STAT4-deficient NK cells showing an impairment of Bhlhe40 induction and diminished H3K4me3. Transcriptomic and protein analysis of Bhlhe40-deficient NK cells revealed a defect in IFN-g production during MCMV infection, resulting in diminished protective immunity following viral challenge. Finally, we provide evidence that Bhlhe40 directly promotes IFN-g by binding throughout the Ifng loci in activated NK cells. Thus, our study reveals how STAT4-mediated control of Bhlhe40 drives protective IFN-g secretion by NK cells during viral infection.
2023-09-13 | GSE242900 | GEO
Project description:Most tissue-resident macrophage populations develop during embryogenesis, self-renew in the steady state, and can expand during type 2 immunity. Whether shared mechanisms regulate macrophage proliferation in homeostasis and disease is unclear. We found that the transcription factor Bhlhe40 was cell-intrinsically required in large peritoneal macrophages (LPMs) for self-renewal and maintenance, but was not required in other resident macrophages. Bhlhe40 was selectively necessary in LPMs for proliferation, but not polarization, in response to IL-4. During a helminth infection, Bhlhe40 was required for normal LPM cell cycling. Bhlhe40 repressed the expression of Maf and Mafb and directly promoted expression of cell cycle-related transcripts to enable proliferation of LPMs. Genomic sites bound by Bhlhe40 in LPMs included some co-bound by the macrophage lineage-determining factor PU.1 and others uniquely bound by Bhlhe40, including Maf and cell cycle-related loci. Our findings demonstrate a tissue-specific control mechanism regulating resident macrophage proliferation in homeostasis and type 2 immunity.
2019-04-30 | GSE125727 | GEO
Project description:BHLHE40-AS1 was cloned into pBABE-Puro. Empty vector and pBABE-BHLHE40-AS1 were used to generate retrovirus and infect MCF10A cells. Transduced cells were selected with 1ug/mL puromycin for 2 weeks.
2020-06-10 | GSE136579 | GEO
Project description:Better understanding of the host responses to Mycobacterium tuberculosis (Mtb) infections is required to prevent tuberculosis and develop new therapeutic interventions. The host transcription factor BHLHE40 is essential for controlling Mtb infection, in part by repressing Il10 expression, where excess IL-10 contributes to the early susceptibility of Bhlhe40-/- mice to Mtb infection. Deletion of Bhlhe40 in lung macrophages and dendritic cells is sufficient to increase the susceptibility of mice to Mtb infection, but how BHLHE40 impacts macrophage and dendritic cell responses to Mtb is unknown. Here we report that BHLHE40 is required in myeloid cells exposed to GM-CSF, an abundant cytokine in the lung, to promote the expression of genes associated with a pro-inflammatory state and better control of Mtb infection. Loss of Bhlhe40 expression in murine bone marrow derived myeloid cells cultured in the presence of GM-CSF results in lower levels of pro-inflammatory associated signaling molecules IL-1b, IL-6, IL-12, TNFα, iNOS, IL-2, KC, and RANTES, as well as higher levels of the anti-inflammatory associated molecules MCP-1 and IL-10 following exposure to heat-killed Mtb. Deletion of Il10 in Bhlhe40-/- myeloid cells restored some, but not all, pro-inflammatory signals, demonstrating that BHLHE40 promotes pro-inflammatory responses via both IL-10-dependent and independent mechanisms. In addition, we show that macrophages and neutrophils within the lungs of Mtb-infected Bhlhe40-/- mice exhibit defects in iNOS production compared to infected WT mice, supporting that BHLHE40 promotes pro-inflammatory responses in innate immune cells, which may contribute to the essential role for BHLHE40 during Mtb infection in vivo.
2024-07-02 | GSE265840 | GEO