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4 protocols using incb024360

1

Inhibitors Modulate Kynurenine in Tumor Cells

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SKOV3 human ovary adenocarcinoma (IDO1+) and A172 human glioblastoma (TDO+) cell lines were obtained from ATCC and cultured in McCoy’s 5A (10% FBS) and Dulbecco’s Modified Eagle’s Medium (DMEM, 10% FBS) culture media, respectively. Cell lines were incubated at 37°C in 96 well plates with either the IDO1 inhibitor INCB024360 (Epacadostat, Selleck) at 2 μM for SKOV3 cells and 20 μM for A172 cells; the TDO inhibitor 680C91 (WuXi Apptec) at 20 μM for all cells; or Kynureninase (Mp-KYNase) at 0.36 mg/ml for all cells. In addition, A172 cells were stimulated with recombinant human IFNγ (100 ng/mL, Sigma) to induce IDO1 expression to determine the effects on Kynureninase, INCB024360 and 680C91 on Kyn levels made by IDO1/TDO dual expressing cells. After 48 h, cell supernatants were collected, snap frozen in liquid nitrogen and stored at −80°C. Kynurenine concentrations of the supernatant were then determined by LC/MS. McCoy’s 5A, DMEM and FBS were all purchased from GIBCO®.
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2

Investigating MM-pDC Interactions and Immunotherapies

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MM cells were cultured in 10% FBS plus RPMI-1640 medium supplemented with antibiotics. MM–pDCs were cocultured either in DCP-MM medium (Mattek Corp., Ashland, MA) or complete RPMI-1640 medium supplemented with IL-3 (Peprotech Inc., Rocky Hill, NJ, USA). CD3-PE/FITC/APC; CD4-FITC/PE or APC-Cy7; CD8-APC/FITC, CD56-PE; CD123-PE/PE-Cy5/FITC; and CD138-FITC/PE/APC were obtained from BD Biosciences (San Jose, CA). BDCA-2-FITC and CD11c-APC were obtained from Miltenyi Biotec (Auburn, CA); CD303-; CD304-; CD107a; and PD-L1-BV421 were purchased from Biolegend. All immunomagnetic separation kits were purchased from Miltenyi Biotec. The CellTrace Violet and CellTracker Green flow assay kits were obtained from Life Technologies (USA). Functional-grade PD-L1 blocking antibody (antihuman PD-L1, clone MIH1) was obtained from eBiosciences [4 (link)]. Ro 61–8048 [13 (link)] and INCB 024360 were purchased from Selleck Chemicals. WST-1 Cell Proliferation Reagent was purchased from Clontech Laboratories, Inc. (USA).
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3

Inhibitors Modulate Kynurenine in Tumor Cells

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SKOV3 human ovary adenocarcinoma (IDO1+) and A172 human glioblastoma (TDO+) cell lines were obtained from ATCC and cultured in McCoy’s 5A (10% FBS) and Dulbecco’s Modified Eagle’s Medium (DMEM, 10% FBS) culture media, respectively. Cell lines were incubated at 37°C in 96 well plates with either the IDO1 inhibitor INCB024360 (Epacadostat, Selleck) at 2 μM for SKOV3 cells and 20 μM for A172 cells; the TDO inhibitor 680C91 (WuXi Apptec) at 20 μM for all cells; or Kynureninase (Mp-KYNase) at 0.36 mg/ml for all cells. In addition, A172 cells were stimulated with recombinant human IFNγ (100 ng/mL, Sigma) to induce IDO1 expression to determine the effects on Kynureninase, INCB024360 and 680C91 on Kyn levels made by IDO1/TDO dual expressing cells. After 48 h, cell supernatants were collected, snap frozen in liquid nitrogen and stored at −80°C. Kynurenine concentrations of the supernatant were then determined by LC/MS. McCoy’s 5A, DMEM and FBS were all purchased from GIBCO®.
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4

Modulation of T Cell Proliferation by CD14-CD15+ Cells

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CD14CD15+ cells were purified from PBMCs or TNF-α-treated PBMCs with CD14-negative and CD15-positive selection kits (Miltenyi Biotec). Additionally, CFSE-labeled (Invitrogen) Pan T cells were purified from HC using magnetic beads (Miltenyi Biotec). The two sets of purified cells were co-cultured in various ratios and stimulated with human T-activator CD3/CD28 (eBscience) and/or IDO inhibitor (INCB024360, Selleck) for 3 days. Cells were stained with PE-Cy7 anti-human CD8 (eBscience), PE anti-human CD4 (eBscience), and FITC anti-human CD3 (eBscience). T cell proliferation was analyzed using flow cytometry.
For intracellular cytokine detection, co-cultured cells were stimulated with 50 ng/mL PMA (Sigma-Aldrich), 1 μg/mL ionomycin (Sigma-Aldrich), and 5 μg/mL BFA (Sigma-Aldrich) for 5 h. T cells were permeabilized and stained with APC anti-human IFN-γ (eBscience), PE anti-human IL-2 (eBscience), and PE-Cy7 anti-human TNF-α (eBscience).
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