CREB3L1 Target Genes in Response to Hepatitis C Replicon Infection
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ABSTRACT:
ORGANISM(S): Homo sapiens
PROVIDER: GSE25157 | GEO | 2011/05/01
SECONDARY ACCESSION(S): PRJNA134345
REPOSITORIES: GEO
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Project description:Membrane-bound transcription factor CREB3L1 undergoes Regulated Intramembrane Proteolysis (RIP) in response to Hepatitis C infection. RIP activates CREB3L1 so that it can prevent the growth of HCV infected cells through the action of downstream genes. We over-expressed a truncated form of CREB3L1 that does not require RIP to enter the nucleus. Cells over-expressing this truncated form were isolated by Fluorescence Activated Cell Sorting (FACS). We used microarray to determine the downstream genes of CREB3L1 in comparison to a flow sorted empty vector control. HCV Replicon-containing cells were transfected with a CREB3L1Δ381-519 to determine the downstream genes.
2011-05-01 | E-GEOD-25157 | biostudies-arrayexpress
Project description:Abstract: Secretion occurs in all cells, with relatively low levels in most cells and extremely high levels in specialized secretory cells, such as those of the pancreas, salivary and mammary glands. Here, we report that the CrebA/Creb3-like family of bZip transcription factors functions to upregulate expression of both the general protein machinery required in all cells for secretion and of cell-type specific secreted proteins. Drosophila CrebA directly binds the enhancers of secretory pathway genes and is both necessary and sufficient to activate expression of every secretory pathway component gene examined thus far. Microarray profiling reveals that CrebA also upregulates expression of genes encoding cell type specific secreted components. Finally, we find that the human CrebA orthologues, Creb3L1 and Creb3L2, have the ability to upregulate the secretory pathway in non-secretory cell types. Goals: Creb3L1 is the closest related human orthologue of Drosophila CrebA. CrebA is required to upregulate genes encoding the protein machinery and cargo in specialized secretory cells. To determine if the human orthologues of CrebA, Creb3L1 and Creb3L2, perform the same function, we expressed the truncated active form of Creb3L1 in non-secretory HeLa cells. We then performed microarray experiments and found that active Creb3L1 is sufficient to upregulate genes encoding the protein machinery of the secretory pathway, as observed with Drosophila CrebA. HeLa cells were transiently co-transfected with truncated Creb3L1 (Creb3L1 T) and GFP. Following 20 hours in culture, GFP positive cells were isolated by FACS and RNA was extracted using the Rneasy kit (Qiagen). As a control, mock transfected cells were also subjected to cell sorting and RNA was extracted using the same protocols. At least three replicates were obtained for each group.
2010-10-18 | E-GEOD-23334 | biostudies-arrayexpress
Project description:The unfolded protein response (UPR) is activated in response to hypoxia-induced stress such as in the tumor microenvironment. This study examined the role of CREB3L1 (cAMP-responsive element-binding protein 3-like protein 1), a member of the UPR, in breast cancer development and metastasis. Initial experiments identified the loss of CREB3L1 expression in metastatic breast cancer cell lines compared to low- or non-metastatic cell lines. When metastatic cells were transfected with CREB3L1 they demonstrated reduced invasion and migration in vitro, as well as a significantly decreased ability to survive under non-adherent or hypoxic conditions. Interestingly, in an in vivo rat mammary tumor model, CREB3L1 expressing cells not only failed to form metastases compared to CREB3L1 null cells but regression of the primary tumors was seen in 70% of the animals as a result of impaired angiogenesis. Microarray and ChIP on Chip analyses identified changes in the expression of many genes involved in cancer development and metastasis, including a decrease in those involved in angiogenesis. These data suggest that CREB3L1 plays an important role in suppressing tumorgenesis and loss of expression is required for the development of a metastatic phenotype. CREB3L1 is a member of the unfolded protein response family of proteins. CREB3L1 expression is lost from metastatic breast cancer cells. We wanted to determine the promoters of genes that CREB3L1 bound to.
2013-10-30 | GSE51802 | GEO
Project description:The unfolded protein response (UPR) is activated in response to hypoxia-induced stress such as in the tumor microenvironment. This study examined the role of CREB3L1 (cAMP-responsive element-binding protein 3-like protein 1), a member of the UPR, in breast cancer development and metastasis. Initial experiments identified the loss of CREB3L1 expression in metastatic breast cancer cell lines compared to low- or non-metastatic cell lines. When metastatic cells were transfected with CREB3L1 they demonstrated reduced invasion and migration in vitro, as well as a significantly decreased ability to survive under non-adherent or hypoxic conditions. Interestingly, in an in vivo rat mammary tumor model, CREB3L1 expressing cells not only failed to form metastases compared to CREB3L1 null cells but regression of the primary tumors was seen in 70% of the animals as a result of impaired angiogenesis. Microarray and ChIP on Chip analyses identified changes in the expression of many genes involved in cancer development and metastasis, including a decrease in those involved in angiogenesis. These data suggest that CREB3L1 plays an important role in suppressing tumorgenesis and loss of expression is required for the development of a metastatic phenotype. CREB3L1 is a member of the unfolded protein response family of proteins. CREB3L1 expression is lost from metastatic breast cancer cells. We wanted to determine the promoters of genes that CREB3L1 bound to. Idenification of promoters to which CREB3L1 is bound following ChIP with a HA antibody or control.
2013-10-30 | E-GEOD-51802 | biostudies-arrayexpress
Project description:Abstract: Secretion occurs in all cells, with relatively low levels in most cells and extremely high levels in specialized secretory cells, such as those of the pancreas, salivary and mammary glands. Here, we report that the CrebA/Creb3-like family of bZip transcription factors functions to upregulate expression of both the general protein machinery required in all cells for secretion and of cell-type specific secreted proteins. Drosophila CrebA directly binds the enhancers of secretory pathway genes and is both necessary and sufficient to activate expression of every secretory pathway component gene examined thus far. Microarray profiling reveals that CrebA also upregulates expression of genes encoding cell type specific secreted components. Finally, we find that the human CrebA orthologues, Creb3L1 and Creb3L2, have the ability to upregulate the secretory pathway in non-secretory cell types. Goals: Creb3L1 is the closest related human orthologue of Drosophila CrebA. CrebA is required to upregulate genes encoding the protein machinery and cargo in specialized secretory cells. To determine if the human orthologues of CrebA, Creb3L1 and Creb3L2, perform the same function, we expressed the truncated active form of Creb3L1 in non-secretory HeLa cells. We then performed microarray experiments and found that active Creb3L1 is sufficient to upregulate genes encoding the protein machinery of the secretory pathway, as observed with Drosophila CrebA.
2010-10-18 | GSE23334 | GEO
Project description:The unfolded protein response (UPR) is activated in response to hypoxia-induced stress such as in the tumor microenvironment. This study examined the role of CREB3L1 (cAMP-responsive element-binding protein 3-like protein 1), a member of the UPR, in breast cancer development and metastasis. Initial experiments identified the loss of CREB3L1 expression in metastatic breast cancer cell lines compared to low- or non-metastatic cell lines. When metastatic cells were transfected with CREB3L1 they demonstrated reduced invasion and migration in vitro, as well as a significantly decreased ability to survive under non-adherent or hypoxic conditions. Interestingly, in an in vivo rat mammary tumor model, CREB3L1 expressing cells not only failed to form metastases compared to CREB3L1 null cells but regression of the primary tumors was seen in 70% of the animals as a result of impaired angiogenesis. Microarray and ChIP on Chip analyses identified changes in the expression of many genes involved in cancer development and metastasis, including a decrease in those involved in angiogenesis. These data suggest that CREB3L1 plays an important role in suppressing tumorgenesis and loss of expression is required for the development of a metastatic phenotype. CREB3L1 is a member of the unfolded protein response family of proteins. CREB3L1 expression is lost from metastatic breast cancer cells. We wanted to determine the effctes CREB3L1 expression had on gene expression.
2013-10-26 | GSE51708 | GEO
Project description:The unfolded protein response (UPR) is activated in response to hypoxia-induced stress such as in the tumor microenvironment. This study examined the role of CREB3L1 (cAMP-responsive element-binding protein 3-like protein 1), a member of the UPR, in breast cancer development and metastasis. Initial experiments identified the loss of CREB3L1 expression in metastatic breast cancer cell lines compared to low- or non-metastatic cell lines. When metastatic cells were transfected with CREB3L1 they demonstrated reduced invasion and migration in vitro, as well as a significantly decreased ability to survive under non-adherent or hypoxic conditions. Interestingly, in an in vivo rat mammary tumor model, CREB3L1 expressing cells not only failed to form metastases compared to CREB3L1 null cells but regression of the primary tumors was seen in 70% of the animals as a result of impaired angiogenesis. Microarray and ChIP on Chip analyses identified changes in the expression of many genes involved in cancer development and metastasis, including a decrease in those involved in angiogenesis. These data suggest that CREB3L1 plays an important role in suppressing tumorgenesis and loss of expression is required for the development of a metastatic phenotype. CREB3L1 is a member of the unfolded protein response family of proteins. CREB3L1 expression is lost from metastatic breast cancer cells. We wanted to determine the effctes CREB3L1 expression had on gene expression. RNA was extracted from LN4D6 rats cells that were either untransfected or transfected with CREB3L1, changes in gene expression following transfection of CREB3l1 were then determined by hybridisation on Affymetrics microarrays.
2013-10-26 | E-GEOD-51708 | biostudies-arrayexpress
Project description:The unfolded protein response (UPR) is activated in response to hypoxia-induced stress such as in the tumor microenvironment. This study examined the role of CREB3L1 (cAMP-responsive element-binding protein 3-like protein 1), a member of the UPR, in breast cancer development and metastasis. Initial experiments identified the loss of CREB3L1 expression in metastatic breast cancer cell lines compared to low- or non-metastatic cell lines. When metastatic cells were transfected with CREB3L1 they demonstrated reduced invasion and migration in vitro, as well as a significantly decreased ability to survive under non-adherent or hypoxic conditions. Interestingly, in an in vivo rat mammary tumor model, CREB3L1 expressing cells not only failed to form metastases compared to CREB3L1 null cells but regression of the primary tumors was seen in 70% of the animals as a result of impaired angiogenesis. Microarray and ChIP on Chip analyses identified changes in the expression of many genes involved in cancer development and metastasis, including a decrease in those involved in angiogenesis. These data suggest that CREB3L1 plays an important role in suppressing tumorgenesis and loss of expression is required for the development of a metastatic phenotype. CREB3L1 is a member of the unfolded protein response family of proteins. CREB3L1 expression is lost from metastatic breast cancer cells. We wanted to determine the promoters of genes that CREB3L1 bound to.
2013-10-30 | GSE51775 | GEO
Project description:The unfolded protein response (UPR) is activated in response to hypoxia-induced stress such as in the tumor microenvironment. This study examined the role of CREB3L1 (cAMP-responsive element-binding protein 3-like protein 1), a member of the UPR, in breast cancer development and metastasis. Initial experiments identified the loss of CREB3L1 expression in metastatic breast cancer cell lines compared to low- or non-metastatic cell lines. When metastatic cells were transfected with CREB3L1 they demonstrated reduced invasion and migration in vitro, as well as a significantly decreased ability to survive under non-adherent or hypoxic conditions. Interestingly, in an in vivo rat mammary tumor model, CREB3L1 expressing cells not only failed to form metastases compared to CREB3L1 null cells but regression of the primary tumors was seen in 70% of the animals as a result of impaired angiogenesis. Microarray and ChIP on Chip analyses identified changes in the expression of many genes involved in cancer development and metastasis, including a decrease in those involved in angiogenesis. These data suggest that CREB3L1 plays an important role in suppressing tumorgenesis and loss of expression is required for the development of a metastatic phenotype. CREB3L1 is a member of the unfolded protein response family of proteins. CREB3L1 expression is lost from metastatic breast cancer cells. We wanted to determine the promoters of genes that CREB3L1 bound to. Idenification of promoters to which CREB3L1 is bound following ChIP with a HA antibody in MDA-MB-435 cells.
2013-10-30 | E-GEOD-51775 | biostudies-arrayexpress
Project description:We have shown that the expression of the endoplasmic reticulum stress sensor Creb3l1 increases in magnocellular neurones (MCNs) in the rat hypothalamus in response to increased physiological demands for protein synthesis. Here we adopted a multiomic strategy to investigate specific roles of Creb3l1 in MCN homeostasis. We first performed chromatin immunoprecipitation followed by genome sequencing (ChIP-seq) to identify Creb3l1 genomic targets in the water deprived MCN enriched hypothalamic preparation. We then compared ChIP-seq gene targets with water deprived and Creb3l1 knockdown supraoptic nucleus RNA sequencing transcriptome datasets. This has provided an integrated signalling-gene regulation network for this transcription factor illuminating changes to cell pathways and function, an approach that has led us to understand the physiological changes that occur in MCNs to cope with excessive protein demands.
2022-07-14 | GSE200400 | GEO