Transcriptomic analysis of natural killer (NK) cells after co-culture with RPMI 8226 multiple myleoma cell line in the presence or absence of peripheral blood lymphocytes
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ABSTRACT:
ORGANISM(S): Homo sapiens
PROVIDER: GSE122169 | GEO | 2021/11/02
REPOSITORIES: GEO
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Project description:We showed that interleukin-6 (IL-6) from bone marrow stromal cells downregulated CD38 expression in multiple myeloma (MM) cells. Then we performed a genome-scale CRISPR-Cas9 knockout screening to identify key molecules mediating IL-6-induced CD38 downregulation. Although IL-6 triggered downregulation of CD38 expression on the majority of RPMI 8226 cells, a small fraction maintained relatively high CD38 expression. We therefore sorted those top 5% cells with CD38-high expression and compared these cells with non-sorted control cells. The gene rank based on p-value identified Janus kinase (JAK) 1 and signal transducer-activator of transcription (STAT) 3 as highly positively enriched genes as potential mediators of IL-6-induced CD38 downregulation. We validated STAT3 and found CD38 expression was regulated by both STAT1 (positively) and STAT3 (negatively), and that inhibition of JAK-STAT3 pathway represents a novel therapeutic option to enhance CD38 expression and anti-CD38 monoclonal antibody-mediated MM cytotoxicity.
2020-07-03 | GSE153710 | GEO
Project description:Multiple Myeloma (MM) is an hematological malignancy. MM cells are resistant to X-ray irradiations. We irradiated RPMI 8226 cancer cells with C-ions, which are more energetic than X-ray irradiations. We found that MM cells, RPMI 8226, are also resistant to C-ion irradiations. We used microarrays to investigate the mechanisms of MM cell resistance to C-ion irradiations.
2016-01-05 | GSE76471 | GEO
Project description:Multiple Myeloma (MM) is an hematological malignancy. MM cells are resistant to X-ray irradiations. We irradiated RPMI 8226 cancer cells with C-ions, which are more energetic than X-ray irradiations. We found that MM cells, RPMI 8226, are also resistant to C-ion irradiations. We used microarrays to investigate the mechanisms of MM cell resistance to C-ion irradiations. MM cells, RPMI 8226, were subjected to 0 or 6 Gy doses of C-ion irradiations. RNA were extratred from each batch of cells one day after irradiations and subjected to microarray analysis.
2016-01-05 | E-GEOD-76471 | biostudies-arrayexpress
Project description:NK cells are an essential component for the control of influenza infection, acting to both clear virus-infected cells and release antiviral cytokines. Engagement of the NK cell CD16-receptor by antibody-coated influenza-infected cells results in antibody-dependent cellular cytotoxicity (ADCC). Though NK cell-mediated ADCC is an important mechanism to control influenza, influenza infection itself may act to enhance the potency of NK cell ADCC. To understand if virus-infected cells increase NK cell activation, we co-cultured human PBMCs with influenza-infected human alveolar epithelial (A549) cells and evaluated the capacity of NK cells to mediate ADCC. Pre-incubation of PBMCs with influenza-infected target cells markedly enhanced the functionality of NK cells by ADCC antibodies in response to HA immune-complexes containing intravenous immunoglobulin (IVIG), allogenic target cells, with and without rituximab. Trans-well and supernatant transfer experiments showed that virus released into the supernatant is responsible for the enhanced functionality of NK cells, which is apparent at both the protein and RNA transcriptomic levels. Furthermore, cytokine multiplex data, RNA sequencing and cytokine blocking/supplementation experiments showed Type I interferons released from PBMCs were the primary mechanism of the influenza-induced increased NK cell functionality and ADCC potency. Importantly, the influenza infection-mediated increase in NK cell mediated anti-influenza ADCC was mimicked by the type I interferon agonist Poly-IC. This suggests a potential mechanism for enhancing monoclonal antibody therapies for influenza. We conclude that influenza-infection induced secretion of type I interferons enhances the ADCC capacity of NK cells and this pathway may potentially be manipulated to improve anti-influenza therapies.
2019-01-03 | GSE115203 | GEO
Project description:Background: Poly (ADP-ribose) polymerase inhibitors (PARPi) prevent single-stranded DNA repair. Olaparib is a PARPi approved for the treatment of BRCA mutant ovarian and breast carcinoma. Emerging clinical data suggest a benefit of combining olaparib with immunotherapy in prostate cancer patients both with and without somatic BRCA mutations. Methods: We examined if olaparib, when combined with IgG1 antibody-dependent cellular cytotoxicity (ADCC)-mediating monoclonal antibodies (mAbs) cetuximab (anti-EGFR), or avelumab (anti-PD-L1), would increase tumor cell sensitivity to killing by natural killer (NK) cells independently of BRCA status or mAb target upregulation. BRCA mutant and BRCA wildtype (WT) prostate carcinoma cell lines were pretreated with olaparib and then exposed to NK cells in the presence or absence of cetuximab or avelumab. Results: NK-mediated killing was significantly increased in both cell lines and was further increased using the ADCC-mediating mAbs. Pre-exposure of NK cells to recombinant IL-15/IL-15RA further increased the lysis of olaparib treated tumor cells. In addition, olaparib treated tumor cells were killed to a significantly greater degree by engineered high-affinity NK cells (haNK). We show here for the first time that (a) olaparib significantly increased tumor cell sensitivity to NK killing and ADCC in both BRCA WT and BRCA mutant prostate carcinoma cells, independent of PD-L1 or EGFR modulation; (b) mechanistically, treatment with olaparib upregulated death receptor TRAIL-R2, and (c) olaparib significantly enhanced NK killing of additional tumor types, including breast, non-small cell lung carcinoma, and chordoma. Conclusions: These studies support the combined use of NK- and ADCC-mediating agents with correctly timed PARP inhibition.
2018-12-11 | GSE121682 | GEO
Project description:Immunoglobulins G (IgG) and their Fc gamma receptors (FcγRs) play important roles in our immune system. The conserved N-glycan in the Fc region of IgG1 impacts interaction of IgG with FcγRs and the resulting effector functions, which has led to design of antibody therapeutics with greatly improved antibody-dependent cell cytotoxicity (ADCC) activities. Studies have suggested that also N-glycosylation of the FcγRIII affects receptor inteactions with IgG, but detailed studies of the interaction of IgG1 and FcγRIIIa with distinct N-glycans have been hindered by the natural heterogeneity in N-glycosylation. In this study, we employed comprehensive genetic engineering of the N-glycosylation capacities in mammalian cell lines to express IgG1 and FcγRIIIa with different N-glycan structures to more generally explore the role of N-glycosylation in IgG1:FcRIIIa binding interactions. We included FcRIIIa variants of both the 158F and 158V allotypes and investigated the key N-glycan features that affected binding affinity. Our study confirms that afucosylated IgG1 has the highest binding affinity to oligomannose FcγRIIIa, a glycan structure commonly found on FcγRIIIa expressed by NK cells but not monocytes or recombinantly expressed FcγRIIIa.
2022-08-30 | PXD035846 | Pride
Project description:The paper describes a model of ADCC.
Created by COPASI 4.26 (Build 213)
This model is described in the article:
A mathematical model of antibody-dependent cellular cytotoxicity (ADCC)
F. Hoffman, D. Gavaghan, J. Osborne, I.P. Barrett, T. You, H. Ghadially, R. Sainson, R.W. Wilkinson, H.M. Byrne
Journal of Theoretical Biology 436 (2018) 39–50
Abstract:
Immunotherapies exploit the immune system to target and kill cancer cells, while sparing healthy tis- sue. Antibody therapies, an important class of immunotherapies, involve the binding to specific antigens on the surface of the tumour cells of antibodies that activate natural killer (NK) cells to kill the tu- mour cells. Preclinical assessment of molecules that may cause antibody-dependent cellular cytotoxicity (ADCC) involves co-culturing cancer cells, NK cells and antibody in vitro for several hours and measuring subsequent levels of tumour cell lysis. Here we develop a mathematical model of such an in vitro ADCC assay, formulated as a system of time-dependent ordinary differential equations and in which NK cells kill cancer cells at a rate which depends on the amount of antibody bound to each cancer cell. Numerical simulations generated using experimentally-based parameter estimates reveal that the system evolves on two timescales: a fast timescale on which antibodies bind to receptors on the surface of the tumour cells, and NK cells form complexes with the cancer cells, and a longer time-scale on which the NK cells kill the cancer cells. We construct approximate model solutions on each timescale, and show that they are in good agreement with numerical simulations of the full system. Our results show how the processes involved in ADCC change as the initial concentration of antibody and NK-cancer cell ratio are varied. We use these results to explain what information about the tumour cell kill rate can be extracted from the cytotoxicity assays.
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2024-09-02 | BIOMD0000000802 | BioModels
Project description:Anti-CD38 monoclonal antibodies like Daratumumab (Dara) are effective in multiple myeloma (MM); however, drug resistance ultimately occurs and the mechanisms behind this are poorly understood. Here, we performed two in vitro genome-wide CRISPR screens to systematically discover the regulators of sensitivity to Dara-mediated antibody-dependent cellular cytotoxicity (ADCC) and identified KDM6A. The loss of KDM6A led to a marked downregulation in CD38 expression by increasing H3K27me3 on the CD38 promoter, resulting in resistance to Dara-mediated ADCC. Yet, adding back CD38 did not completely rescue this phenotype. In fact, KDM6A loss also downregulated CD48, which promoted Dara resistance by inhibiting natural killer cell activity. Lowering the H3K27me3 with an EZH2 inhibitor restored sensitivity to Dara through CD38 and CD48 upregulation. These findings suggest KDM6A loss as a mechanism of Dara resistance and explore the strategy of using an EZH2 inhibitor, one of which is already FDA-approved, to improve the response to Dara in MM.
2024-01-23 | GSE228766 | GEO
Project description:Anti-CD38 monoclonal antibodies like Daratumumab (Dara) are effective in multiple myeloma (MM); however, drug resistance ultimately occurs and the mechanisms behind this are poorly understood. Here, we performed two in vitro genome-wide CRISPR screens to systematically discover the regulators of sensitivity to Dara-mediated antibody-dependent cellular cytotoxicity (ADCC) and identified KDM6A. The loss of KDM6A led to a marked downregulation in CD38 expression by increasing H3K27me3 on the CD38 promoter, resulting in resistance to Dara-mediated ADCC. Yet, adding back CD38 did not completely rescue this phenotype. In fact, KDM6A loss also downregulated CD48, which promoted Dara resistance by inhibiting natural killer cell activity. Lowering the H3K27me3 with an EZH2 inhibitor restored sensitivity to Dara through CD38 and CD48 upregulation. These findings suggest KDM6A loss as a mechanism of Dara resistance and explore the strategy of using an EZH2 inhibitor, one of which is already FDA-approved, to improve the response to Dara in MM.
2024-01-23 | GSE228770 | GEO
Project description:Anti-CD38 monoclonal antibodies like Daratumumab (Dara) are effective in multiple myeloma (MM); however, drug resistance ultimately occurs and the mechanisms behind this are poorly understood. Here, we performed two in vitro genome-wide CRISPR screens to systematically discover the regulators of sensitivity to Dara-mediated antibody-dependent cellular cytotoxicity (ADCC) and identified KDM6A. The loss of KDM6A led to a marked downregulation in CD38 expression by increasing H3K27me3 on the CD38 promoter, resulting in resistance to Dara-mediated ADCC. Yet, adding back CD38 did not completely rescue this phenotype. In fact, KDM6A loss also downregulated CD48, which promoted Dara resistance by inhibiting natural killer cell activity. Lowering the H3K27me3 with an EZH2 inhibitor restored sensitivity to Dara through CD38 and CD48 upregulation. These findings suggest KDM6A loss as a mechanism of Dara resistance and explore the strategy of using an EZH2 inhibitor, one of which is already FDA-approved, to improve the response to Dara in MM.
2024-01-23 | GSE228769 | GEO