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The effect of MPO inhibitor on the gene expression profiles in HL-60 cell lines exposed to 1, 2, 4,-benzenetriol

ABSTRACT: To reveal the gene expression profile changes after exposure to BT, one of benzene metabolites, with or without ABAH, a myeloperoxidase (MPO) inhibitor, and to elucidate how MPO is involved in myelotoxicity of BT, we performed microarray analysis. HL-60 cells suspended in RPMI 1640 containing with 10% of heat-inactivated FBS at 4×10^5/ mL were incubated with or without BT (50 μM) at 37℃ for one or 4 hours. For MPO inhibition experiment, HL-60 (4×10^5 cells/ mL) were pretreatment with 100 μM of ABAH in RPMI 1640/10% of heat-inactivated FBS at 37℃ for 24 hours. Media was then replaced with new media containing the regent plus BT (50 μM) and incubate at 37℃ for one or 4 hours. Unexposed HL-60 cells were used as controls. To validate the microarray results, we selected 22 genes and conducted a real-time PCR.

ORGANISM(S): Homo sapiens

PROVIDER: GSE50805 | GEO | 2013/12/01

SECONDARY ACCESSION(S): PRJNA219057

REPOSITORIES: GEO

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The effect of MPO inhibitor on the gene expression profiles in HL-60 cell lines exposed to 1, 2, 4,-benzenetriol

Project description:To reveal the gene expression profile changes after exposure to BT, one of benzene metabolites, with or without ABAH, a myeloperoxidase (MPO) inhibitor, and to elucidate how MPO is involved in myelotoxicity of BT, we performed microarray analysis. HL-60 cells suspended in RPMI 1640 containing with 10% of heat-inactivated FBS at 4×10^5/ mL were incubated with or without BT (50 μM) at 37℃ for one or 4 hours. For MPO inhibition experiment, HL-60 (4×10^5 cells/ mL) were pretreatment with 100 μM of ABAH in RPMI 1640/10% of heat-inactivated FBS at 37℃ for 24 hours. Media was then replaced with new media containing the regent plus BT (50 μM) and incubate at 37℃ for one or 4 hours. Unexposed HL-60 cells were used as controls. To validate the microarray results, we selected 22 genes and conducted a real-time PCR. Gene expression alteration induced by 50 μM of BT in HL-60 cells, with or without ABAH, was measured at 1 and 4 hours after exposure to it. Three independent experiments were performed at each time (1 or 4 hours).

2013-12-01 | E-GEOD-50805 | biostudies-arrayexpress

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Proteome of CD4 T cells activated through the TCR in the presence of IL2 and IL12 - Part 1

Project description:To activate primary T cells, lymph nodes were removed and disaggregated. Cells were cultured in RPMI 1640 containing L-glutamine, 10% FBS, 50 μM β-mercaptoethanol and penicillin/streptomycin. Cells were stimulated with 1 μg/ml of the CD3 monoclonal antibody (2C11) and 2 μg/ml anti-CD28 (37.51) in the presence of cytokines IL12 (10 ng/ml) and 20 ng/ml IL2 (20 ng/ml). Cells were stimulated for 24 hours. Live TCR activated CD4+ cells were sorted for CD4+ and CD45.1+ expression and DAP1 exclusion prior to collection for proteomics processing. Mice were “wild-type” (ie non-TCR transgenic) from OT-2 CD45.1 expressing C57bl6 background maintained in-house line.

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In Vivo RNA Interference Screening Identifies a Leukemia-Specific Dependence on Integrin Beta 3 Signaling

Project description:We used an in vivo short hairpin RNA (shRNA) screening approach to identify genes that are essential for MLL-AF9 acute myeloid leukemia (AML). We found that Integrin Beta 3 (Itgb3) is essential for murine leukemia cells in vivo, and for human leukemia cells in xenotransplantation studies.M-BM- In leukemia cells, Itgb3 knockdown impaired homing, downregulated LSC transcriptional programs, and induced differentiation via the intracellular kinase, Syk.M-BM- In contrast, loss of Itgb3 in normal HSPCs did not affect engraftment, reconstitution, or differentiation. M-BM- Finally, we confirmed that Itgb3 is dispensable for normal hematopoiesis and required for leukemogenesis using an Itgb3 knockout mouse model.M-BM- Our results establish the significance of the Itgb3 signaling pathway as a potential therapeutic target in AML. R940406 (R406, the active metabolite of fostamatinib) was supplied by Rigel Pharmaceuticals, Inc., South San Francisco, CA, and AstraZeneca Pharmaceuticals, Wilmington, DE, USA. R406 was resuspended in dimethyl sulfoxide (DMSO) (Sigma-Aldrich) and stored at M-bM-^HM-^R80M-BM-0C. . HL-60, U937 and KG-1 cell lines were purchased from the American Type Culture Collection. MOLM-14 cell lines were provided by Dr. Scott Amstrong (Dana-Farber Cancer Institute, Boston MA, USA.) All cell lines were maintained in RPMI 1640 (Cellgro) supplemented with 1% penicillin-streptomycin and 10% fetal bovine serum (FBS, Sigma-Aldrich) at 37 M-BM-0C with 5% CO2. MOLM-14, U937, HL-60 and KG-1 cells were grown in 4mM R406 for 24 hours

2013-04-24 | E-GEOD-46302 | biostudies-arrayexpress

In Vivo RNA Interference Screening Identifies a Leukemia-Specific Dependence on Integrin Beta 3 Signaling

Project description:We used an in vivo short hairpin RNA (shRNA) screening approach to identify genes that are essential for MLL-AF9 acute myeloid leukemia (AML). We found that Integrin Beta 3 (Itgb3) is essential for murine leukemia cells in vivo, and for human leukemia cells in xenotransplantation studies. In leukemia cells, Itgb3 knockdown impaired homing, downregulated LSC transcriptional programs, and induced differentiation via the intracellular kinase, Syk. In contrast, loss of Itgb3 in normal HSPCs did not affect engraftment, reconstitution, or differentiation. Finally, we confirmed that Itgb3 is dispensable for normal hematopoiesis and required for leukemogenesis using an Itgb3 knockout mouse model. Our results establish the significance of the Itgb3 signaling pathway as a potential therapeutic target in AML. R940406 (R406, the active metabolite of fostamatinib) was supplied by Rigel Pharmaceuticals, Inc., South San Francisco, CA, and AstraZeneca Pharmaceuticals, Wilmington, DE, USA. R406 was resuspended in dimethyl sulfoxide (DMSO) (Sigma-Aldrich) and stored at −80°C. . HL-60, U937 and KG-1 cell lines were purchased from the American Type Culture Collection. MOLM-14 cell lines were provided by Dr. Scott Amstrong (Dana-Farber Cancer Institute, Boston MA, USA.) All cell lines were maintained in RPMI 1640 (Cellgro) supplemented with 1% penicillin-streptomycin and 10% fetal bovine serum (FBS, Sigma-Aldrich) at 37 °C with 5% CO2.

2013-04-24 | GSE46302 | GEO

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