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Fra-2 overexpression upregulates pro-metastatic cell-adhesion molecules, promotes pulmonary metastasis and reduces survival in a spontaneous xenograft model of human breast cancer

ABSTRACT: Fra-2 overexpression upregulates pro-metastatic cell-adhesion molecules, promotes pulmonary metastasis and reduces survival in a spontaneous xenograft model of human breast cancer

PROVIDER: PRJNA623184 | ENA |

REPOSITORIES: ENA

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Fra-2 overexpression upregulates pro-metastatic cell-adhesion molecules, promotes pulmonary metastasis and reduces survival in a spontaneous xenograft model of human breast cancer

Project description:The effect of Fra-2 overexpression in two stable Fra-2 overexpressing clones of the human breast cancer cell line MDA-MB-231 on survival and metastatic load was studied after subcutaneous injection into scid and E- and P-selectin deficient scid (select) mice. To identify Fra-2 target genes, we performed cDNA microarrays with mRNA isolated from xenograft tumour tissue. Fra-2 overexpression lead to a significantly shorter overall survival and a higher amount of spontaneous metastases in scid mouse lungs and compared to select mice indicating that Fra-2 regulates selectin binding sites on the tumour cell surface, which directly influence overall survival. By using cDNA microarray analysis of resected primary tumours a multitude of deregulated genes, which are known to be involved in metastasis formation

2020-04-06 | GSE148089 | GEO

Fra-2 overexpression upregulates pro-metastatic cell-adhesion molecules, promotes pulmonary metastasis, and reduces survival in a spontaneous xenograft model of human breast cancer.

Project description:PurposeThe transcription factor Fra-2 affects the invasive potential of breast cancer cells by dysregulating adhesion molecules in vitro. Previous results suggested that it upregulates the expression of E- and P-selectin ligands. Such selectin ligands are important members of the leukocyte adhesion cascade, which govern the adhesion and transmigration of cancer cells into the stroma of the host organ of metastasis. As so far, no in vivo data are available, this study was designed to elucidate the role of Fra-2 expression in a spontaneous breast cancer metastasis xenograft model.MethodsThe effect of Fra-2 overexpression in two stable Fra-2 overexpressing clones of the human breast cancer cell line MDA MB231 on survival and metastatic load was studied after subcutaneous injection into scid and E- and P-selectin-deficient scid mice.ResultsFra-2 overexpression leads to a significantly shorter overall survival and a higher amount of spontaneous lung metastases not only in scid mice, but also in E- and P-deficient mice, indicating that it regulates not only selectin ligands, but also selectin-independent adhesion processes.ConclusionThus, Fra-2 expression influences the metastatic potential of breast cancer cells by changing the expression of adhesion molecules, resulting in increased adherence to endothelial cells in a breast cancer xenograft model.

| S-EPMC9114065 | biostudies-literature

The relationship between expression imbalance of adhesion molecules and asthma pathogenesis

2014-02-01 | GSE54605 | GEO

The relationship between expression imbalance of adhesion molecules and asthma pathogenesis

Project description:Accumulated research has suggested the importance of the adhesion molecules modulation as therapeutic approach for bronchial asthma. Adhesion molecules expression alteration contributes to the pathogenesis of asthma. In order to probe the relationship between expression imbalance of adhesion molecules and asthma pathogenesis, expression profiling of adhesion molecules was performed using cDNA microarray. The results showed that there were various adhesion molecules with abnormal expressions in peripheral blood leucocytes of asthma patients. RNA was extracted from leucocytes in peripheral blood of 4 normal adults and 6 asthma patients by using TRIzol Reagent. Microarray expression studies were performed using the GEArray Q Series Human Extracellular Matrix & Adhesion Molecules Gene Array (SABiosciences Corporation, USA). This microarray profiles the expression of 96 genes key to the functions of cell adhesion. A negative control (PUC18DNA and blank), and the housekeeping genes including Î²-actin, GAPDH, Cyclophilin A and ribose body protein L13a were spread on each chip.

2014-02-01 | E-GEOD-54605 | biostudies-arrayexpress

Comparative analysis of gene expression in Fra-1+/+ and Fra-1-/- mice lung

2014-05-22 | GSE43695 | GEO

Identification of Fra-1 and/or Fra-2 regulated genes in MDA-MB231 cells

Project description:In the paper "Fra-1 regulates its target genes via binding to remote enhancers without exerting major control on chromatin architecture in triple negative breast cancers" by Bejjani et al., we identified Fra-1 and/or Fra-2 target genes in MDA-MB-231 cells. si RNA against Fra-1 and against Fra-2 were transfected in MDA-MB-231 cells either independenlty or simultaneously to identify genes regulated specifically by Fra-1 or Fra-2 and genes regulated redundantly or complementarily by Fra-1 and Fra-2 total RNA were purified and biotinylated sense-strand cDNA were produced. cDNA targets were used to probe Affymetrix GeneChip Human Gene 2.0 ST arrays

2021-02-23 | GSE146823 | GEO

Analysis of extracellular matrix and adhesion molecules expression in ALL cell line

Project description:The acute lymphoblastic leukemia cells lines JM-1, REH, Nalm-27, and SUP-B15 were analyzed for baseline expression of extacellular matrix and adhesion molecules using a pathway focused cDNA microarray (SABiosciences). RNA isolated from the ALL cell lines JM-1, REH, Nalm-27, and SUP-B15 was analyzed using the Extracellular Matrix and Adhesion Molecules Oligo GEArray (SABIosciences).

2010-05-01 | E-GEOD-18516 | biostudies-arrayexpress

Comparative analysis of gene expression in Fra-1+/+ and Fra-1-/- mice lung

Project description:We hypothesized that gene expression in lungs of Fra-1+/+ and Fra-1-/- mice are divergent thus contributing fibrosis. More specifically, Fra-1-/- mice are increased susceptible to fibrosis. In order to test these hypotheses at the gene expression level, we utilized microarray analysis to examine transcriptional differences between Fra-1+/+ and Fra-1-/- mice at early time point. This study utilizes microarray analysis to test these hypotheses. 5 days PBS and bleomycin treated lung samples from both Fra-1+/+ and Fra-1-/- mice were used. RNA was isolated and used for global gene expression profiling (Affymetrix MoGene 1.0ST v1 Array). The raw probe signal intensities were quantile normalized over all samples, summarized with the robust multi-array average (RMA) algorithm and log2 transformed with a median polish, using the Affymetrix Power Tools. We considered a transcript cluster (gene-level) to be reliably expressed in a sample if the Affymetrix implemented DABG (detection above ground) p-value was less than 0.05. We used local-pooled-error (LPE) estimates and robust statistical tests for evaluating significance of each gene's differential expression in a comparison.

2014-05-22 | E-GEOD-43695 | biostudies-arrayexpress

A Whole-Cell Screening Platform for Discovering Cell Adhesion Molecules Enabling Programmable Bacterial Cell-Cell Adhesion

Project description:A Whole-Cell Screening Platform for Discovering Cell Adhesion Molecules Enabling Programmable Bacterial Cell-Cell Adhesion

| PRJNA1047165 | ENA

Fra-2 negatively regulates postnatal alveolar septation by modulating myofibroblast function

Project description:Purpose: Compare the transciptome between lung myofibroblasts that contituatively express Fra-2 to control lung myofibroblasts to determine genes that may contribute to regulation of secondary alveolar septation Methods: mRNa sequences from lung myofibroblasts isolated from mutant mice that contituatively express Fra-2 in α-SMA expressing cells (sma-Fra2) were compared to control mice. n=4 in each group Results: 43,432 transcripts wre analyzed and 361 genes were differentially expressed in the smaFra2 mice compared to wild type control. Functional analysis was performed using the Database for Annotation, Visualization and Integrated Discovery. Changes in genes from lung myofibroblasts in smaFra2 mice: genes involved with extracellular matrix and cell adhesion were upregulated; Ectonucleotide pyrophosphatase/phosphodiesterase family member 2 (Enpp2) and LPA receptor1 (LPA1) were downregulated. Coclusion: The secondary alveolar septation defect in smaFra2 mice could be explaned by Fra-2 mediated changes in extracellular matrix and cell adhesion in developing lung myofibroblasts.

2018-01-01 | GSE94857 | GEO

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