Dataset Information

IPSC-derived macrophages: the differentiation protocol affects cell immune and metabolic characteristics and differentiation trajectories

ABSTRACT: The generation of human macrophages from induced pluripotent stem cells (iMacs) is a rapidly developing approach used to create disease models, screen drugs, study macrophage-pathogen interactions and develop macrophage-based cell therapy. To generate iMacs, different types of protocols have been suggested, all thought to result in the generation of similar iMac populations. However, direct comparison of iMacs generated using different protocols has not been performed. We have compared the productivity, the differentiation trajectories and the characteristics of iMacs generated using two widely used protocols and found significant differences in: (i) protocol productivity; (ii) dynamic changes in the expression of genes related to inflammation and lipid homeostasis following iMac differentiation; and (iii) the transcriptomic profiles of terminally differentiated iMacs, including the expression of genes involved in inflammatory response (e.g., CCL2, CCL8, NLRP2), antigen presentation (e.g., HLA class II, CD74, CFSF) and lipid homeostasis (e.g., LDRL, MSR1, OLR1, RETN). The results document for the first time the dependence of fine iMac characteristics on the type of differentiation protocol, which is important for further development of the field and various iMac applications.

ORGANISM(S): Homo sapiens

PROVIDER: GSE220450 | GEO | 2022/12/10

REPOSITORIES: GEO

ACCESS DATA

Similar Datasets

Project description:BMDMs or iMACs were generated via differentiation of bone marrow cells or immortalized precursors, respectively, in culture media containing m-CSF for 7 day. Upon differentiation, BMDMs or iMacs were left untreated or stimulated as described below. 1) BMDM WT were stimulated with IFNa, LPS, PGE2, IL-4, IL-10, LPS+PGE2, LPS+IL-4, LPS+IL-10, IFNa+PGE2, IFNa+IL-10: each condition in duplicate. This experiment was performed to investigate transcriptional cross-antagonism in the concomitant presence of pro-inflammatory (LPS or IFNa) and anti-inflammatory stimuli (IL-4, IL-10, or PGE2). 2) BMDM WT were stimulated with LPS, in the presence or absence of PFI-1 (Brd2/4 inhibitor) or SGC-CBP30 (CBP/p300 inhibitor): each condition in triplicate. This experiment was performed to define pro-inflammatory genes dependent or not on chromatin remodeling for their induction. 3) BMDM Mef2C/D proficient (Vav-Cre) or BMDM Mef2C/D KO (obtained by crossing Mef2d-/- Mef2cfl/fl with Vav-Cre mice) were stimulated with LPS, PGE2, or LPS+PGE2: each condition in triplicate. This experiment was performed to investigate the role of MEF2C-D on LPS transcritptional response. 4) BMDM WT were pretreated for 40 minutes with an anti-IL10R antibody or the corresponding isotope control, and then left untreated or stimulated with LPS, PGE2 or LPS+PGE2: each condition in duplicate. This experiment was performed to investigate the crosstalk between IL-10 and PGE2. 5) BMDM WT were left untreated or stimulated with PGE2, LPS, LPS+PGE2, or LPS+PGE2+IFNb. In the latter condition, IFNb was added 1 hour after the beginning of the costimulation: each condition in triplicate. This experiment was performed to asses the impact of PGE2 into the LPS-mediated IFNb induction. 5) MEF2A-deficient iMac clones (D7, A7, A8, C7) and MEF2A-proficient (referred to as wild-type) iMac clones (NE, B3 and D10) were generated via CRISPR/Cas9 and stimulated or not with LPS: each condition in single. This experiment was performed to investigate the role of MEF2A on LPS transcritptional response.

Project description:We previously demonstrated that Alox5 deficiency impairs the function of LSCs and prevents the initiation of BCR-ABL-induced CML. To identify the pathways in which Alox5 gene regulates function of LSCs, we performed a comparative DNA microarray analysis using total RNA isolated from non-BCR-ABL-expressing Lin-Sca-1+c-Kit+, BCR-ABL-expressing wild type LSCs and BCR-ABL-expressing Alox5-/- LSCs. The result was validated by quantitative real-time PCR analysis of non-BCR-ABL-expressing Lin-Sca-1+c-Kit+, BCR-ABL-expressing wild type LSCs and BCR-ABL-expressing Alox5-/- LSCs. We have shown that Alox5 is a critical regulator of leukemia stem cells (LSCs) in a BCR-ABL-induced chronic myeloid leukemia (CML) mouse model, and we hypothesize that the Alox5 pathway represents a major molecular network that regulates LSC function. Therefore, we sought to further dissect this pathway by comparing the gene expression profiles of wild type and Alox5-/- LSCs derived from our mouse model for BCR-ABL-induced CML. DNA microarray analysis revealed a small group of candidate genes that exhibited changes in the levels of transcription in the absence of Alox5 expression. In particular, we noted that the expression of the Msr1 gene was up-regulated in Alox5-/- LSCs, suggesting that Msr1 might suppress the proliferation of LSCs. Using our CML mouse model, we show that Msr1 is down-regulated by BCR-ABL and this down-regulation is partially restored by Alox5 deletion, and that Msr1 deletion causes acceleration of CML development. Moreover, Msr1 deletion markedly increases LSC function through its effects on cell cycle progression and apoptosis. We also show that Msr1 affects CML development by regulating the PI3K-AKT pathway and ?-Catenin. Together, these results demonstrate that Msr1 suppresses LSCs and CML development. The enhancement of Msr1 function may be of significance in the development of novel therapeutic strategies targeting CML. To identify genes that are regulated by BCR-ABL in LSCs and LSCs without Alox5 gene, we compared the gene profile between wild type(WT) LSCs or Alox5-/- LSCs.

Dataset Information

IPSC-derived macrophages: the differentiation protocol affects cell immune and metabolic characteristics and differentiation trajectories

Similar Datasets

OmicsDI is part of the ELIXIR infrastructure