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Cellular retinoic acid binding protein 2 (CRABP2) inhibits tumor growth by two distinct mechanisms

ABSTRACT: CRABP2 potently suppresses carcinoma cell growth, yet the mechanism(s) that underlie this activity remain incompletely understood. Two distinct functions are known for CRABP2: 1) the classical function of this protein is to directly deliver retinoic acid (RA) to the nuclear retinoic-acid receptorthereby activate gene expression, and 2) in the absence of RA, CRABP2 directly binds to the RNA-binding and stabilizing protein, HuR, and markedly strengthens its interactions with target mRNAs. We used microarray experiments to elucidated genes regulated by HuR and/or CRABP2 in the absence of retinoic acid. Two experiments were preformed: 1) Transcriptome profiles of MCF-7 cells overexpresssing shHuR were compared to control cells, both in the absence of retinoic acid. 2) Transcriptome profiles of MCF-7 cells overexpresssing shCRABP2 were compared to control cells, both in the absence of retinoic acid.

ORGANISM(S): Homo sapiens

SUBMITTER: Liraz Levi

PROVIDER: E-GEOD-62291 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Cellular retinoic acid binding protein 2 (CRABP2) inhibits tumor growth by two distinct mechanisms

Project description:CRABP2 potently suppresses carcinoma cell growth, yet the mechanism(s) that underlie this activity remain incompletely understood. Two distinct functions are known for CRABP2: 1) the classical function of this protein is to directly deliver retinoic acid (RA) to the nuclear retinoic-acid receptorthereby activate gene expression, and 2) in the absence of RA, CRABP2 directly binds to the RNA-binding and stabilizing protein, HuR, and markedly strengthens its interactions with target mRNAs. We used microarray experiments to elucidated genes regulated by HuR and/or CRABP2 in the absence of retinoic acid.

2014-10-14 | GSE62291 | GEO

MicroRNA profiling shows different response to retinoids in estrogen-receptor positive and negative cells

Project description:This Series reports results of miRNA profiling of estrogen-receptor-positive (MCF7) and estrogen-receptor-negative (MDA-MB-231) cells. Retinoic Acid (RA) induces mir-21 in MCF-7 but not in MDA-MB-231 cells. MCF-7 and MDA-MB-231 cells were treated (or not) with retinoic acid (RA) and grown for either 6 hours or 48 hours.

2010-05-21 | GSE18628 | GEO

MicroRNA profiling shows different response to retinoids in estrogen-receptor positive and negative cells

2010-05-21 | E-GEOD-18628 | biostudies-arrayexpress

Genome wide expression analysis of Ctbp2 knock down mouse F9 cells

Project description:Using an RNA interference-based genetic screen in mouse F9 cells we identify the transcriptional corepressor CTBP2 as a coactivator critically required for retinoic acid (RA)-induced transcription. Here we perfom a whole genome transcriptome analysis in F9 cells expressing shRNA for Ctbp2 and Rxr in the absence or presence of retinoic acid (RA). A total of 2,754 genes were found to be upregulated (>2 fold) and 1518 genes were downregulated (>2 fold) in response to RA treatment in the control cells. We find that around 52% and 55% of upregulated genes are dependent on Ctbp2 and Rxr for activation respectively suggesting that Ctbp2 is a coactivator of RA signaling. Whole genome RNA-sequencing in F9 cells expressing shGFP or shCtbp2 or shRxr

2013-06-21 | E-GEOD-47708 | biostudies-arrayexpress

Effect of CRABP2 depletion and overexpression on thyroid cancer cell lines

Project description:Cellular retinoic acid-binding protein 2, encoded by the CRABP2 gene, is a protein that facilitates retinoic acid binding to its cognate receptor complex and transport to the nucleus. Our analysis indicates that CRABP2 expression is upregulated in thyroid cancer and is involved in the invasiveness of thyroid cancer. Loss- and gain-of-function approaches were used to elucidate its oncogenic mechanisms.

2022-03-02 | GSE197534 | GEO

Human epidermal keratinocytes treated with retinoic acid or thyroid hormone

Project description:Targets of Retinoic Acid (RA) were identified in primary human epidermal keratinocytes grown in the presence or absence of all-trans retinoic acid for 1, 4, 24, 48 and 72 hours. Targets of Thyroid Hormone (T3) were identified in primary human epidermal keratinocytes grown in the presence or absence of the hormone; same controls as for RA.

2010-06-11 | GSE22298 | GEO

Genome-wide Binding Site Mapping of Retinoic Acid Receptors and Coregulators in Breast Cancer Cells

Project description:Retinoic acid (RA) triggers growth-suppressive effects in tumor cells and therefore RA and its synthetic analogs have great potential as anti-carcinogenic agents. RA effects are mediated by retinoic acid receptors (RARs), which regulate gene expression in an RA-dependent manner. To define the genetic network regulated by RARs in breast cancer cells, we identified RAR genomic targets using chromatin immunoprecipitation and expression analysis in a model breast cancer cell line MCF-7. Furthermore, we identified genomic binding sites for two putative RAR coregulators FoxA1 and GATA3. Keywords: ChIP-Chip Analysis

2009-03-16 | GSE15244 | GEO

Murine embryonic stem cells synthesize retinoic acid to promote their own spontaneous differentiation

Project description:Embryonic stem cells (ESC) are derived from blastocyst-stage embryos and are thought to be functionally equivalent to the inner cell mass in their developmental potential. ESCs pluripotency is maintained through a complex interplay of different signaling pathways and a network of transcription factors, which is centered around Oct3/4, Sox2 and Nanog. Although, in general, much is known about this pluripotency self-renewal circuitry, the molecular events that lead ESC to exit from pluripotency and begin differentiation are currently less known. Retinoic acid, an active metabolite of the vitamin A (retinol), plays important and pleiotropic roles in vertebrate embryonic development and ESC differentiation. Here we demonstrate that RA promotes early steps of ESC differentiation, and that ESC increase their capacity to synthesize RA during spontaneous differentiation as embryoid bodies, up-regulating the RA biosynthetic pathway components RDH1, RDH10, ADH3, RALDH2, and CRABP2. Microarray derived from total RNA of mESC not treated or treated with all-trans retinoic acid (ATRA) for 2 hours.

2016-02-10 | E-GEOD-66043 | biostudies-arrayexpress

Human epidermal keratinocytes treated with retinoic acid or thyroid hormone

2010-06-23 | E-GEOD-22298 | biostudies-arrayexpress

Distinct gene expression profile of Huh7 cell lines stably overexpressing CRABP1 or 2

Project description:The metabolism of ROL to the biogenesis of ATRA occurs in the cytoplasms of hepatocytes, which in turn translocates into nucleus upon binding to Cellular Retinoic Acid Binding Proteins, CRABP1 or CRABP2. However, the differential effect of CRABP1 and CRABP2 on the intracellular environment is not well understood. Here, we report polyA RNA sequencing data of the CRABP1 or CRABP2 overexpressing Huh7 cells.

2019-02-01 | GSE101934 | GEO

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