Conduct gene profiling experiment from a melanoma cell line which silenced galectin-3 gene expression to understand different phenotypic properties observed during tumor growth
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ABSTRACT:
ORGANISM(S): Mus musculus
PROVIDER: GSE31922 | GEO | 2011/09/06
SECONDARY ACCESSION(S): PRJNA145047
REPOSITORIES: GEO
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Project description:Conduct gene profiling experiment from a melanoma cell line which silenced galectin-3 gene expression to understand different phenotypic properties observed during tumor growth. A melanoma cell line which silenced galectin-3 gene expression was obtained. This cell line was used in overexpression experiments, using a galectin-3 coding plasmid. Both galectin-3 negative and positive cells were obtained in syngeneic wild type and galectin-3 knockout mice. Altogether, we had evidence that while galectin-3 derived from the tumor cells impaired tumor growth, galectin-3 derived from stromal cells apparently favored tumor growth. Angiogenic response within tumors derived from galectin-3 expressing melanoma cells was delayed as compared to control conditions. Cells recruited to these distinct microenvironments seem to control tumor growth. Gene profiling of this tissue will allow for an integrative view of the process that was somehow orchestrated by galectin-3.
2011-09-05 | E-GEOD-31922 | biostudies-arrayexpress
Project description:Although galectin-3 is known to modulate the cell proliferation, RNA processing, tumorigenesis, metastasis and apoptosis and also, which is highly expressed in human cancers, the function of galectin-3 is still controversy in gastric cancer. Here, we demonstrated the function of galectin-3 on gastric cancers by silencing with synthetic double-stranded small interfering RNA (siRNA). After silencing of galectin-3, cell numbers decreased and cell shapes changed in round. To determine the mechanism, microarray analysis was used to detect the changes in gene expression by galectin-3 silencing. we silenced galectin-3 in AGS as a gastric cancer cells with synthetic double-stranded small interfering RNA (siRNA), and performed the microarray analysis to detect the changes in gene expression by galectin-3 silencing.
2011-05-31 | E-GEOD-29630 | biostudies-arrayexpress
Project description:Prostate cancer (PCa) causes significant mortality among men worldwide. Galectin-4 plays an important roles in regulatiog cancer metastasis and high level of galectin-4 correlated with poor survival in subpopulation of PCa patients. To further understand the galectin-4-mediated signature and develop effective treatment, we froced expressed galectin-4 in 22Rv1 and LNCaP cells, and downregulated galectin-4 in 22Rv1-M4 cells. Next, cDNA microarray were applyed to study galectin-4-mediated gene expression and cancer progression.
2018-06-30 | GSE100301 | GEO
Project description:The goal of this study was to examine differences in gene expression of tumor specific CD8 T cells in an in vivo tumor mouse model after inhibition of galectin-3 protein expression by genetic knockout. Galectin-3 is thought to modulate CD8 T cell response by cross-linking cell surface glycoproteins Galectin-3 is a 31 kD carbohydrate-binding lectin that is over-expressed by many human malignancies. It also modulates T cell responses through a diverse array of mechanisms including induction of apoptosis, TCR cross linking in CD8+ T cells, and T cell receptor (TCR) down regulation in CD4+ T cells. We found that patients responding to a granulocyte-macrophage colony-stimulating factor (GM-CSF) secreting allogeneic pancreatic tumor vaccine developed post immunization antibody responses to galectin-3 on a proteomic screen. We used the HER-2/neu (neu-N) transgenic mouse model to study galectin-3 binding on adoptively transferred high avidity neu-specific CD8+ T cells derived from TCR transgenic mice. Here, we show that galectin-3 binds preferentially to activated antigen-committed CD8+ T cells only in the tumor microenvironment (TME). Galectin-3 deficient mice exhibit improved CD8+ T cell effector function and increased expression of several inflammatory genes when compared with wild type (WT) mice. We also show that galectin-3 binds to LAG-3, and LAG-3 expression is necessary for galectin-3 mediated suppression of CD8+ T cells in vitro. Lastly, galectin-3 deficient mice have significantly elevated levels of circulating plasmacytoid dendritic cells (pDCs), which are superior to conventional dendritic cells (cDCs) in activating CD8+ T cells. Binding of galectin-3 to cell-surface glycoproteins on immune cells suppresses a pro-inflammatory immune response. Thus, inhibiting galectin-3 in conjunction with CD8+ T cell directed immunotherapies should enhance the tumor specific immune response. 3 different experimental groups were studied. Galectin-3 WT CD8 T cells adoptively transferred into Galectin-3 WT mice, galectin-3 WT CD8 T cells transferred into galectin-3 KO mice, and finally galectin-3 KO CD8 T cells transferred into galectin-3 KO mice. Galectin-3 WT CD8 T cells transferred into Galectin-3 WT mice were used as the reference group. Four biological replicates were submitted for each group, and adoptively transfered CD8 T cells were isolated 5 days post-adoptive transfer into tumor-bearing mice treated with a whole cell GM-CSF secreting vaccine. Cells were purified by cell sorting on the Thy1.2 surface marker.
2015-02-19 | E-GEOD-59454 | biostudies-arrayexpress
Project description:The goal of this study was to examine differences in gene expression of tumor specific CD8 T cells in an in vivo tumor mouse model after inhibition of galectin-3 protein expression by genetic knockout. Galectin-3 is thought to modulate CD8 T cell response by cross-linking cell surface glycoproteins Galectin-3 is a 31 kD carbohydrate-binding lectin that is over-expressed by many human malignancies. It also modulates T cell responses through a diverse array of mechanisms including induction of apoptosis, TCR cross linking in CD8+ T cells, and T cell receptor (TCR) down regulation in CD4+ T cells. We found that patients responding to a granulocyte-macrophage colony-stimulating factor (GM-CSF) secreting allogeneic pancreatic tumor vaccine developed post immunization antibody responses to galectin-3 on a proteomic screen. We used the HER-2/neu (neu-N) transgenic mouse model to study galectin-3 binding on adoptively transferred high avidity neu-specific CD8+ T cells derived from TCR transgenic mice. Here, we show that galectin-3 binds preferentially to activated antigen-committed CD8+ T cells only in the tumor microenvironment (TME). Galectin-3 deficient mice exhibit improved CD8+ T cell effector function and increased expression of several inflammatory genes when compared with wild type (WT) mice. We also show that galectin-3 binds to LAG-3, and LAG-3 expression is necessary for galectin-3 mediated suppression of CD8+ T cells in vitro. Lastly, galectin-3 deficient mice have significantly elevated levels of circulating plasmacytoid dendritic cells (pDCs), which are superior to conventional dendritic cells (cDCs) in activating CD8+ T cells. Binding of galectin-3 to cell-surface glycoproteins on immune cells suppresses a pro-inflammatory immune response. Thus, inhibiting galectin-3 in conjunction with CD8+ T cell directed immunotherapies should enhance the tumor specific immune response.
2015-02-19 | GSE59454 | GEO
Project description:The multifunctional -galactoside-binding protein galectin-3 is found in many distinct subcellular compartments including the cell nucleus. Expression and distribution of galectin-3 between the cell nucleus and the cytosol changes during cell differentiation and cancer development. Nuclear functions of galectin-3 and how they contribute to tumorigenesis are not understood. In order to identify nuclear galectin-3 interaction partners, we used affinity chromatography and co-immunoprecipitation. Spatial proximity in the nucleus was assessed by immunofluorescence and proximity ligation assay. We also investigated the function of galectin-3 on mRNA-export by fluorescence in situ hybridization and on mRNA-processing by RNA-sequencing.
2016-06-07 | E-MTAB-4783 | biostudies-arrayexpress
Project description:Our previous study demonstrated that Galectin-1 plays a protective role for colitis by binding with polylactosamine structures in β-1,4-galactosyltransferase I-deficient mice, but precise function of galectin-1 remains unknown. In the present study, we investigated about the anti-inflammatory role of galectin-1 for macrophages to ameliorate inflammatory bowel disease in both animal model and human tissue sample. To know the anti-inflammatory effect of galectin-1 in vivo, transfer of BMDMs cultured with galectin-1 into Recombination activating gene (Rag) 2-/- mice and treatment with galectin-1 in dextran sodium sulfate (DSS) colitis model were performed. Furthermore, RNA sequencing was performed to know the character of macrophages treated with galectin-1. In UC patients, tissue expressions of galectin-1 were decreased in inflamed mucosa compared with those in non-inflamed mucosa. Galectin-1 induced IL-10 production in BMDMs, and the production was abrogated by the addition of lactose, which inhibits the interaction of oligosaccharide-galectin binding. DSS colitis was significantly ameliorated in Rag2-/- mice to which galectin-1-treated BMDMs were transferred, than those transferred with vehicle-treated BMDMs. RNA sequence showed that treatment with Galectin-1 increased the expression of CCAAT/enhancer binding protein β and CD163 but decreased CD80 on BMDMs. Galectin-1 ameliorates murine colitis through the induction of oligosaccharide-dependent anti-inflammatory properties to macrophages.
2020-05-19 | GSE137257 | GEO
Project description:Hyperactive angiogenesis contributes to the immunosuppressive microenvironment important for immunotherapy, and LGALS1-encoed galectin-1 can trigger vascular signaling programs and mediate anti-angiogenic treatment response. However, the mechanism of galectin-1 regulation of angiogenesis is poorly understood. Previous mRNA interactome studies suggested that galectin-1 associated with mRNAs. In this study, we applied the iRIP-seq methodology, an unbiased genome-wide approach to study the RNA binding profiles of galectin-1. The results demonstrate that galectin-1 interacted with a large population of mRNAs with a preferred location towards stop codon, and preferred motifs of UGCA/UGGA and GAGCAG motifs. Galectin-1-bound mRNAs are enriched in cell cycle control and diverse basic biological processes, including its previously reported protein targets H-Ras and also T cell receptors TLR6. Glectin-1 significantly binds to genes in angiogenesis, which included the key pro-angiogenic growth factor VEGFA, angiogenic regulators EGR1 and LAMA5, suggesting that galectin-1 may regulate via its mRNA binding activity. The presented results uncover an previously unrecognized mRNA binding activity of galectin-1; further pursue of this activity could lead to knowledge important for developing therapeutic strategies against cancer and other diseases involved in aberrant angiogenesis.
2021-10-14 | GSE147565 | GEO
Project description:Although galectin-3 is known to modulate the cell proliferation, RNA processing, tumorigenesis, metastasis and apoptosis and also, which is highly expressed in human cancers, the function of galectin-3 is still controversy in gastric cancer. Here, we demonstrated the function of galectin-3 on gastric cancers by silencing with synthetic double-stranded small interfering RNA (siRNA). After silencing of galectin-3, cell numbers decreased and cell shapes changed in round. To determine the mechanism, microarray analysis was used to detect the changes in gene expression by galectin-3 silencing.
2011-05-31 | GSE29630 | GEO
Project description:Galectin-9 suppresses growth of Li-7 cells, a cell line of human hepatocellular carcinoma, in vitro study. Micro RNA expression of Li-7 cells, a cell line of hepatocellular carcinoma, with or without administration of galectin-9 were assessed in vitro.
2015-03-01 | E-GEOD-55665 | biostudies-arrayexpress