Regulation of p21 by TWIST2 contributes to its tumor suppressor function in human acute myeloid leukemia
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ABSTRACT: TWIST2 is deregulated in about 1/3 human acute myeloid leukemia (AML)M-BM- patients partially due to hypermethylation. Overexpression of TWIST2 in various AML cell lines and primary AML cells leads to growth arrest, reduced colony forming cell (CFC) capacity, inhibited cell migration and tumorigenic ability in nude mice, suggesting its tumor suppressor role in AML. To explore the molecular insight of how TWIST2 acts as a tumor suppressor in AML cells, control and TWIST2 expressed THP-1 cells have been analyzed with microarray. 4 independent biological replicates of control and TWIST2 expressed THP-1 cells have been used for RNA extraction and microarray analysis with Agilent platform.
Project description:TWIST2 is deregulated in about 1/3 human acute myeloid leukemia (AML) patients partially due to hypermethylation. Overexpression of TWIST2 in various AML cell lines and primary AML cells leads to growth arrest, reduced colony forming cell (CFC) capacity, inhibited cell migration and tumorigenic ability in nude mice, suggesting its tumor suppressor role in AML. To explore the molecular insight of how TWIST2 acts as a tumor suppressor in AML cells, control and TWIST2 expressed THP-1 cells have been analyzed with microarray.
Project description:To explore the mechanism related to the induction of monocytic differentiation in AML combination of ATRA and RAD001, gene expression patterns of THP-1 cells were analyzed using the Agilent Whole Human Genome Expression Array. Gene expression patterns of THP-1 cell cultured under four different conditions were analyzed. The conditions were as follows; 1, untreated. 2, treated with ATRA (1mM) and RAD001 (2.5nM). Total RNA was extracted at 5 days after starting treatment.
Project description:This SuperSeries is composed of the following subset Series: GSE32141: Expression analysis LPS stimulated THP-1 cells in four paired samples GSE32324: ChIP-seq analysis LPS stimulated THP-1 cells Refer to individual Series
Project description:Transcriptional changes during early infection of macrophage-like THP-1 cell line with pathogenic bacterium Mycobacterium tuberculosis. RNAseq samples were taken at 0h (THP-1 cells growing in the RPMI medium), and after 4h, 24h and 48h post infection. Bacterial enrichment was performed to increase the amount of bacterial mRNA in the samples. Non-enriched samples were used to map THP-1 cells transcripts; enriched samples were used to map M. tuberculosis transcripts the corresponding genomes.
Project description:We explored the role of SMARCA4 and the two Brahma associated factors SMARCD2 and DPF2 in leukaemia. We observed the selective requirement for these factors for leukemic cell expansion, as well as extended survival of mice transplanted with leukaemic cells with reduced expression of these genes. Gene expression profiling revealed largely similar alterations with the down-regulation of each of these three factors, suggesting a concerted function in transformed blood cells. These changes included loss of pluripotency-associated signature but did not correlate with c-MYC down-regulation. Human acute monocytic leukemia cells (THP-1, ACC 16) were lentivirally transduced with pLKO-puro vectors carrying shRNAs against SMARCA4, SMARCD2 or DPF2. As a negative control, THP-1 cells were transduced with pLKO-puro-shScr (Scrambled). All samples were prepared as biological triplicates.
Project description:We studied genome-wide miRNA expression in THP-1 cells treated with/without AGEs. Significant upregulation of miR-214 was observed in THP-1 cells treated with/without AGEs. Two samples, one treated with AGE-BSA and one without AGEs.
Project description:We analysed the capacity of THP-1 cells (differentiated to macrophagoid cells) to recognize RNA sequences via pattern recognition receptors in vitro. Gene expression was analysed by RNA-Microarray. Cytokine production was analysed by ELISA assays. We used microarrays to investigate differential gene expression in THP-1 cell line undifferentiated in comparison with 3 days or 8 days differentiated with phorbol myristate acetate (PMA). Microarray analysis revealed differential gene expression patterns of THP-1 when differentiated. THP-1 cells, undifferentiated, 3 days PMA-differentiated and 8 days PMA-differentiated
Project description:We showed that co-culture with TAMs triggered Bmi1 expression in gastrointestinal cancer cell lines. miRNAs have been found to target various oncogenes and tumor suppressors. We therefore hypothesized that the regulation of Bmi1 expression in gastrointestinal cancer cells may be mediated by miRNAs using miRNA microarray analysis. THP-1 cells were seeded in the transwell inserts (3540, Corning) for 6-well plates (1 M-CM-^W 106 cells/well). For preparation of M1-polarized THP-1 macrophages, 320 nM phorbol myristate acetate (PMA) was added to THP-1 cells for 6 h, followed by PMA plus 20 ng/ml interferon (IFN)-M-NM-3 and 100 ng/ml lipopolysaccharide for the following 18 h. For preparation of M2-polarized THP-1 macrophages, 320 nM PMA was added to THP-1 cells for 6 h, followed by PMA plus 20 ng/ml interleukin (IL)-4/IL-13 for the following 18 h. After three washes to remove cytokines, M1- or M2-polarized THP-1 macrophages were co-cultured in upper inserts with AGS cells in 6-well plates (1 M-CM-^W 105 cells/well) without direct contact, in each medium without 10% FBS as described above. After 24 h of co-culture, the upper inserts containing macrophages were discarded. AGS cells were collected and analyzed to identify downregulated microRNA in a gastric cancer cell line co-cultured with M1- or M2-polarized macrophage.
Project description:Lipid laden macrophages (LLM) can often be found in the airway and may indicate aspiration secondary to gastro-oesophageal reflux (GOR). GOR is often associated chronic inflammatory airways diseases. We therefore sought to determine whether lipid droplets from undigested or partially digested food had an effect on macrophage gene expression leading to bronchial inflammation. To test this, we generated an in vitro model using differentiated THP-1 cells which were treated with a high fat liquid feed. Gene expression, using the Agilent G4851C (v3) array, in phorbol myristate acetate (PMA) differentiated THP-1 cells was compared to undifferentiated cells and lipid treated differentiated THP-1 cells.
Project description:Poor clinical outcome of Acute Myeloid Leukemia (AML) and Myelodysplastic Syndrome (MDS) has been attributed to failure of current chemotherapeutic regimens to target leukemic stem cells. We recently identified p21-activated kinase (PAK1) as a downstream effector molecule of H2.0-like homeobox (HLX), a gene functionally relevant for AML pathogenesis. In this study, we find that inhibition of PAK1 activity by small molecule inhibitors or by RNA interference leads to profound leukemia-inhibitory effects both in vitro and in vivo. Inhibition of PAK1 induces differentiation and apoptosis of AML cells through downregulation of MYC oncogene and a core network of MYC target genes. Moreover, we find that PAK1 up-regulation occurs during disease progression and is relevant for patient survival in MDS. Importantly, we find that inhibition of PAK1 inhibits primary human leukemic cells including immature leukemic stem cell-enriched populations. Our studies highlight PAK1 as a novel target in AML and MDS, and support the use of PAK1 inhibitors as a therapeutic strategy in these diseases. To obtain insight into the molecular mechanism for the induction of apoptosis and differentiation resulting from PAK1 inhibition in AML, we performed gene expression microarrays following treatment with either IPA-3 or FRAX-597. RNA was isolated from THP-1 cells after 5 hours of treatment with IPA-3 (6 ug/mL), FRAX-597 (2 ug/mL) or an equal volume of DMSO using Trizol Reagent (Invitrogen).