Gene expression profiling of mouse bone marrow-derived macrophages (RNA-Seq)
Ontology highlight
ABSTRACT:
ORGANISM(S): Mus musculus
PROVIDER: GSE58283 | GEO | 2014/11/01
SECONDARY ACCESSION(S): PRJNA251892
REPOSITORIES: GEO
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2014-11-01 | E-GEOD-58283 | biostudies-arrayexpress
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Project description:Analysis of growth factor influence on immortalized human meibomian gland epithelial cells at gene expression level. Growth factors play a critical role in the proliferation and differentiation of sebaceous gland epithelial cells. Given that the meibomian gland is a large sebaceous gland, we hypothesize that growth factors exert analogous effects on human meibomian gland epithelial cells. Results provide important information of the response of human meibomian gland epithelial cells to epidermal growth factor (EGF), bovine pituitary extract (BPE), and both, such as up- or down- regulated genes involved in lipid metabolic process and cell cycle. Human meibomian gland epithelial cells were immortalized in our lab with a retrovirus containing telomerase reverse transcriptase (hTERT). hTERT immortalized cells (3 wells /condition / experiment) were seeded onto 6-well plates at the density of 3.76M-CM-^W104cells /well in SFM basal medium, SFM basal medium with epidermal growth factor (EGF; 5 ng/ml), SFM basal medium with bovine pituitary extract (BPE; 50 M-BM-5g/ml), and SFM basal medium with 5ng/ml EGF plus 50 M-BM-5g/ml BPE (KGM). Total RNA was extracted from cultures in SFM basal medium at day 2, and from cultures in SFM basal medium with BPE, basal medium with EGF, and SFM basal medium with EGF plus BPE at day 7.
2012-07-30 | E-GEOD-18099 | biostudies-arrayexpress
Project description:Heterogeneity among iPSC lines with regard to their gene expression profile and differentiation potential has been described and has been at least partly linked to the tissue of origin. We generated iPSCs from primitive (linneg) and non-adherent differentiated (linpos) bone marrow cells (BM-iPSC), and compared their differentiation potential to that of fibroblast-derived iPSCs (Fib-iPSC) and ESCs. In the undifferentiated state, individual iPSC clones but also ESCs proved remarkably similar when analyzed for alkaline phosphatase and SSEA-1 staining, endogenous expression of the pluripotency genes Nanog, Oct4, and Sox2, or global gene expression profiles. However, substantial differences between iPSC clones were observed after induction of differentiation, which became most obvious upon cytokine-mediated instruction towards the hematopoietic lineage. All three BM-iPSC lines derived from undifferentiated cells yielded high proportions of cells expressing the hematopoietic differentiation marker CD41, and in two of these lines, high proportions of CD41+/CD45+ cells were detected. In contrast, little hematopoiesis-specific surface marker expression was detected in linpos BM-iPSC and FIB-iPSC lines. These results were corroborated by functional studies demonstrating robust colony outgrowth from hematopoietic progenitors in two of the linneg BM-iPSCs only. Thus, in summary our data demonstrate efficient generation of iPSCs from primitive hematopoietic tissue as well as efficient hematopoietic redifferentiation for linneg BM-iPSC lines, thereby further supporting the notion of an epigenetic memory in iPSCs. Murine embryonic fibroblasts (MEFs) from C3H mice were cultured in low-glucose DMEM supplemented with 10% heat-inactivated fetal calf serum gold (PAA, Pasching, Austria), penicillin-streptomycin, 1 mM L-glutamine and 0.05 mM beta-mercaptoethanol on gelatine-coated dishes. C3H MEFs were grown to confluence, inactivated with 10 ug/ml Mitomycin C (Sigma) and used as feeder layers. Virus production was performed in a four plasmid-manner. Briefly, 3.5x10^6 293T cells were seeded 24h prior to transfection in 10 cm dishes. 293T cells were cultivated in high-glucose DMEM (Gibco) supplemented with 10% heat-inactivated FCS, penicillin-streptomycin and 1 mM L-glutamine. Cells were transfected with 5 ug lentiviral vector, 8 ug pcDNA3.GP.4xCTE (expressing HIV-1 gag/pol), 5 ug pRSV-Rev and 2 ug pMD.G (encoding the VSV glycoprotein) using the calcium phosphate method in the presence of HEPES and chloroquine. Supernatants were harvested 48h and 72h after transfection, filtered and subsequently 50x concentrated by ultracentrifugation. Titers determined based on real-time PCR, were in the range of 1-5x10^7/ml. For iPSC generation, bone marrow cells were isolated from femurs and tibias of Oct4-GFP transgenic mice (OG2) and immunomagnetically separated into lineage negative (Lin-) and lineage positive (Lin+) populations using the mouse lineage depletion kit (Miltenyi Biotec). Lin- cells were cultivated in serum-free StemSpan medium (Stem Cell Technology) supplemented with 2 mM L-glutamine, penicillin-streptomycin, 10 ng/ml mSCF, 20 ng/ml mTPO, 20 ng/ml, 20 ng/ml IGF-2 and 10 ng/ml FGF-1 (all Peprotech). Lin+ cells were cultivated in Iscove's modified eagle medium (IMDM), supplemented with 15% heat-inactivated FCS, 1 mM L-glutamine, penicillin-streptomycin, 100 ng/ml mSCF, 100 ng/ml mFLT3-L, 10 ng/ml hIL-3 and 100 ng/ml hIL-11. Both Lin- and Lin+ cells were pre-stimulated in the aforementioned media for 48 h. Thereafter, 2x10^5 Lin- and and Lin+ bone marrow cells were transduced on Retronection-coated plates (Takara) with lentiviral vectors encoding for human Oct4, Sox2, Klf4 and c-Myc using a multiplicity of infection (MOI) of 50 per virus. Twenty-four hours after transduction, media were supplemented with 2 mM valproic acid. Transduced bone marrow cells were kept in hematopoietic medium until 5 or 7 days post transduction (p.t.) and then transferred onto Mitomycin C-treated MEF feeders on gelatine-coated dishes. Henceforward, cells were cultivated in ES cell medium (knockout DMEM (Gibco), 15% ES-tested FCS, 1 mM L-glutamine, 0.1 mM non-essential amino acids (Gibco), 100 uM beta-mercaptoethanol (Sigma), penicillin-streptomycin and 103 units/ml leukemia inhibitory factor (LIF, provided by the Max-Planck-Institute, Munster, Germany). Upon appearance of GFP-positive ESC-like colonies, single colonies were picked based on morphology and GFP expression. Murine ESCs and iPSCs were cultured on Mitomycin C-treated MEF feeders in the aforementioned ES medium. Murine ESCs and iPSCs were passaged every 2-3 days. The murine embryonic fibroblast-derived iPSC lines (MEF-iPS, 3FLV2, 4FLV1) were generated by transduction of OG2-MEFs with the same lentiviral vector constructs using standard technology. For iPSC lines 3FLV2 and 4FLV1, complete reprogramming was demonstrated by alkaline phosphatase and SSEA1-staining, pluripotency factor expression and teratoma formation.
2012-08-10 | GSE29635 | GEO
Project description:Pluripotency can be induced from different cell types using different methods. Several studies have reported that iPSC retain an epigenetic memory from the tissue from which they were derived. However, the influence of the method used for reprogramming in the final pluripotent state has not been investigated yet. Therefore, we have taken advantage of germline stem cells (GSCs) that can be converted into germline pluripotent stem cells (gPSCs) using specific culture conditions or into induced pluripotent stem cells (iPSCs) after the forced expression of four transcription factors. Here, we compare the gene expression profile, imprinting methylation pattern and differentiation potential between GSC-derived iPSCs and gPSCs. Our analysis demonstrates that both reprogramming methods induce equivalent levels of pluripotency and that a donor GSC transcriptional memory is retained only at early steps after reprogramming. In summary, our results show that different reprogramming methods generate undistinguishable pluripotent states and exclude a method-dependent epigenetic memory. Cell Culture. All the cell lines used in this study were derived from OG2 mice. Unless otherwise noted, all cell culture reagents were purchased from Gibco or PAA. Neonatal GSCs derived from 10 days postpartum (d.p.p) murine testis and adult GSCs derived from 35 d.p.p murine testis were derived as previously described and cultured on irradiated C3H feeder cells in a medium composed of StemPro-34 SFM (including supplement), N2 supplement (1:100), 1 % heat-inactivated fetal calf serum (FCS), 5 mg ml-1 bovine serum albumin (BSA) fraction V, 100 U ml-1 penicillin, 100 µg ml-1 streptomycin, 2 mM L‑glutamine, 0.1 mM non-essential amino acids (NEAA), 0.1 mM β‑mercaptoethanol, MEM vitamins (1:100), 6 mg ml-1 D‑(+)‑glucose (Sigma), 30 mg ml-1 pyruvic acid, 0.1 % DL‑lactic acid (Sigma), 60 ng ml-1 progesterone (Sigma), 30 ng ml-1 β‑estradiol (Sigma), 15 ng ml-1 mouse EGF (Peprotech), 10 ng ml-1 human bFGF (Peprotech), 10 ng ml-1 human GDNF (Peprotech), and 1000 U ml-1 mouse LIF (in‑house preparation). For maintenance culture, GSCs were passaged at a 1:2‑ratio once a week after digestion with 0.05 % trypsin/EDTA. In addition, ESCs, iPSC and gPSC were cultured on irradiated C3H feeders in the following medium: Knockout DMEM, 20% Knockout Serum Replacement, penicillin, streptomycin, L‑glutamine, NEAA, β‑mercaptoethanol, and LIF. Generation of pluripotent cell lines. iPSC were generated using tetracycline-inducible lentiviruses. For the lentiviral production, 293T cells were plated at 50 % confluency in 10-cm dishes one day prior to transfection. The next day, the lentiviral vector (3 µg) together with the packaging plasmids psPAX2 (2 µg) and pMD2.G (1 µg) (Addgene plasmids #12260 and #12259, respectively) were transfected using FuGENE 6 reagent (Roche) according to the manufacturer’s protocol. After 48 h, viral-containing supernatants were filtered (0.45 µm), concentrated around 30-fold by centrifugation (26,000 × g, 2 h, 4 °C) and stored at -80 °C. For the generation of iPSCs, a single-cell suspension of 50,000 GSCs was infected overnight with five tetracycline-inducible lentiviruses (5–20 µl concentrated supernatant each) encoding for Oct4, Sox2, Klf4, c-Myc, and the reverse tetracycline-transactivator M2-rtTA (Addgene plasmids #20323, #20326, #20322, #20324, and #20342) in the presence of 4 µg ml-1 polybrene (Sigma). One week after the infection, the expression of the viral transgenes was induced by adding 4 µg ml-1 doxycycline (Sigma) to the medium. MEFs-derived iPSCs were generated using the same protocol. gPSC were generated following a previous reported protocol. Briefly, GSCs were seeded at a density of approx. 1000 cells cm-2 on feeder cells and were not splitted until gPSC colonies were observed. Both iPSC and gPSC colonies were identified by Oct4-GFP expression, manually picked and expanded under ESC conditions. In vitro differentiation of pluripotent cells. Embryoid body (EB) formation was induced in suspension culture adopting the hanging drop method (600 cells in 20 µl) for 5 days in ESC medium without LIF. EBs were seeded on gelatine-coated plates and further cultured for 14 days in the same medium. Chimera formation. Aggregations of putative pluripotent cells with denuded 8-cell stage embryos were performed as previously reported. After overnight incubation at 37 °C and 5 % CO2, 11–14 aggregates were transferred into the uterine horns of 2.5 d.p.c pseudo-pregnant surrogate mothers (mated with vasectomized males). The chimeric pups were obtained and dissected at 14.5 d.p.c. Microarray gene expression analysis. Purified cRNA samples were prepared with the linear TotalPrep RNA Amplification Kit (Ambion) from 500 ng original RNA, involving synthesis of double-stranded cDNA by T7-promoter-linked oligo(dT) primers and 14 hours of in-vitro transcription incorporating biotin-labelled nucleotides. Hybridizations onto MouseRef 8 v2.0 Expression BeadChips (Illumina) was performed according to the manufacturer’s recommendations. Two replicates were hybridized from each sample. Chips were stained with streptavidin-Cy3 (GE Healthcare) and scanned using an iScan reader (Illumina). The bead intensities were mapped to gene information using BeadStudio 3.2 (Illumina). Background correction was performed using the Affymetrix robust multiarray analysis (RMA) background correction model. Variance stabilization was performed by log2 scaling, and gene expression normalization was calculated with the method implemented in the lumi package of R-Bioconductor.
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