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20 protocols using vx 765

1

Primary Immune Cell Coculture Protocol

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Primary human keratinocytes were supplied by Lonza and cultured in Growth Medium 2 with supplement (C-20011, C-39011; PromoCell). Primary umbilical vein endothelial cells were supplied by Lifeline Cell Technology and cultured in endothelial cell growth medium (C-22010; PromoCell). Mouse primary keratinocytes were isolated from the tails of C57Bl/6 mice and cultured as previously [42 (link)]. Peripheral blood mononuclear cells (PBMCs) were isolated from donor blood by Ficol Histopaque 1077, then frozen at 5x106/mL in FBS/DMSO until use. Cells were thawed and cultured in RPMI + 10% hiFBS. T lymphocytes were depleted from PBMCs using positive selection for CD2 by MACS standard protocol (Militenyi). All cells were maintained at 37°C and 5% CO2. For PBMC-NHEK coculture, NEHKs were plated at 4x104/mL in keratinocyte growth media in TC-treated 96 well plates and grown for 48 h. The media was then aspirated and replaced with 100uL 1x106/mL PBMCs in RPMI + 10% FBS. For cell lysis, 0.05% triton X-100 (Sigma) was added 5 min. Other cell treatments are 5 μM caspase-1 inhibitor YVAD-fmk (R&D Systems), 50 μM SpeB inhibitor E-64 (Sigma), 20 μg/mL anti-IL-18 IgG (Abcam), or 10 μM caspase-1 inhibitor VX-765 (Invivogen), for the full duration of the experiment.
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2

Cytokine Quantification from Monocytes

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For cytokine quantification, primary monocytes were seeded in 96-well plates at 5 × 103 cells/well, in RPMI 1640, GlutaMAX medium (Thermofisher) supplemented with 10% fetal calf serum (Lonza) and incubated for 3 h in the presence of LPS (10 ng/mL, Invivogen). Primary monocytes were then treated for 1 h 30 with nigericin (5 μM, Invivogen); UCN-01 (12.5 μM, Sigma), TcdB (125 ng/mL, Abcam) or steroid catabolites at the indicated concentrations. When indicated, monocytes were treated with colchicine (1 μM, Sigma), nocodazole (5 μM, Sigma), VX-765 (25 μM, Invivogen), MCC950 (10 μM, Adipogen AG-CR1–3615) or Calyculin A (Sigma, 208851) 30 min before addition of steroid catabolites, UCN-01, TcdB or nigericin. Following the incubation, cells were centrifuged, and supernatants were collected.
To assess cytokine release, 8 × 104 U937 cells per well of a 96 wells plate were exposed to 100 ng.mL−1 of phorbol 12-myristate 13-acetate (PMA; InvivoGen) for 48 h and primed with LPS at 50 ng/mL for 3 h. When applicable, nigericin was used at 50 μg.mL−1. Supernatant was collected at 3 h post treatment. Levels of IL-1β, IL-18 or TNF in cell supernatants were quantified by ELISA (R&D Systems). The number of replicates and independent experiments are listed in the corresponding figure legends.
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3

Mycobacterial Infection of Macrophages

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Mtb or Mycobacterium bovis-BCG were cultured in 7H9 medium containing 10% oleic albumin dextrose catalase growth supplement (OADC) enrichment (Becton Dickinson) and 0.05% Tween 80. Before infection cultures were washed in PBS-T, resuspended in DMEM containing 10%FBS and passed through a 5-micron filter to ensure single cells. Multiplicity of infection (MOI) was determined by optical density (OD) with an OD of 1 being equivalent to 3×108 bacteria per milliliter. Bacteria were added to macrophages for 4 hours then cells were washed with PBS and fresh media was added. At the indicated time points supernatants were harvested for cytokine analysis and the cells were processed for further analysis. Cell death was assessed using Cell-Titer-Glo luminescent cell viability assay (Promega) following manufacturer’s instructions. For inhibitor treatments cells were treated with the indicated concentrations of IFNγ (Peprotech), MCC950 (Adipogen) or VX-765 (Invivogen) or vehicle control overnight prior to infection and maintained in the media throughout the experiment.
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4

Prenatal Inflammasome Inhibition and Offspring Behavior

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Pregnant C57BL/6 mice were given three intraperitoneal injections of either VX-765 (50 mg/kg/d, caspase-1 inhibitor, InvivoGen), MCC950 (50 mg/kg/d, NLRP3-inflammasome inhibitor, InvivoGen), or saline as vehicle. Drugs were injected once per day starting on embryonic day (E)12.5 until E14.5. Behavioral assays were performed on the male offspring when they were eight weeks old.
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5

VX-765 Inhibits HIV Replication

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VX-765 (Invivogen) was dissolved in 20% cremophor and injected intraperitoneally (i.p.) in HIV-1 infected humanized mice at 200 mg/kg once a day starting at day 2 post-infection and for 21 consecutive days. Control humanized mice received the corresponding vehicle. An appropriate sample size (n=12) was calculated during the study design for each group to obtain a difference on viral load of 15% between the groups by taking into account a common standard deviation of 10% using a bilateral student t-test based on a 95% confidence level. The level of humanization was randomized between the two groups before HIV-1 infection.
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6

Inflammasome Activation in MDMi Cells

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For inflammasome activation experiments, MDMi were primed with 200 ng/ml of ultrapure LPS (E.Coli 0111:B4, Invivogen) for 3 h or 50 μg of S-clamp or F-clamp for 6 h. Cells were washed in after priming to remove residual LPS or S-Clamp and cells were stimulated with conventional NLRP3 inflammasome activators ATP (5 mM, Sigma) and nigericin (10 μM, Invivogen), or fibrillar α-synuclein (10 μM, Proteos), S-Clamp (2–50 μg) or SARS-CoV-2 isolates (MOI 0.1, 1) for the indicated time. For priming studies, MDMis were pre-treated with the NF-kB inhibitor, Bay 11-7082 (3 μM, Sigma), before stimulation with S-clamp and the addition of ATP, nigericin or α-synuclein. For inhibition studies, MCC950 (10 μM), VX-765 (20 μM, Invivogen) and MLN-4760 (1,10 μM, Sigma) were added after the priming step. At the end of treatment, the supernatant was collected and stored at −80 °C until analysis by enzyme-linked immunosorbent assay (ELISA) or western blotting.
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7

Monocyte Priming and Activation Assay

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Primary monocytes were seeded into 96‐well plates at 5 × 103 cells/well, in RPMI 1640, GlutaMAX medium (Thermo Fisher Scientific) supplemented with 10% fetal calf serum (Lonza). When indicated, primary monocytes were incubated for 3 h in the presence of LPS (10 ng/ml, InvivoGen). Unless otherwise indicated, primary monocytes were then treated for 90 min with nigericin (5 μM, InvivoGen), ATP (2.5 mM, Sigma) (Mariathasan et al, 2006), staurosporine (1.25 μM, Tocris), UCN‐01 (12.5 μM, Sigma), or Ro31‐8820 (100 μM, Tocris). When indicated, monocytes were treated with colchicine (1 μM or at the indicated concentration, Sigma), MCC950 (10 μM, Adipogen AG‐CR1‐3615), paclitaxel (Taxol, 5 μM, Sigma), nocodazole (5 μM, Sigma), z‐YVAD‐FMK, z‐IETD‐FMK, z‐DEVD‐FMK (at the indicated concentrations, Bachem, #4027532, #4034771, #4027402, respectively), VX‐765 (InvivoGen), 30 min before addition of UCN‐01, TcdB (Abcam, #ab124001, 125 ng/ml), and TcdA (1 μg/ml) or nigericin. TcdA was purified from Clostridioides difficile VPI10463 strain, as previously described (von Eichel‐Streiber et al, 1987; Popoff, 1987). Following the incubation, cells were centrifuged and supernatants were collected.
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8

Culturing and Differentiating Immune Cells

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Primary blood cells, THP-1 and U937 cells were cultured in RPMI1640 (Gibco) supplemented with 10% FCS, 2 mM sodium pyruvate and 1 mM l-glutamine. THP-1 cells were derived from a patient with acute monocytic leukaemia and U937 cells are myeloid cells derived from a patient with histiocytic lymphoma. Primary human macrophages were differentiated by magnetically separating CD14-positive cells (BD Biosciences) from peripheral blood mononuclear cells extracted on a Ficoll gradient (GE Healthcare) and subsequently differentiated over 10 days using 50 ng/ml M-CSF (Peprotech). They were stimulated the following day in the presence of 5 ng/ml M-CSF. Differentiation of both THP-1 and U937 cells were carried out using 50 ng/ml PMA for 24 h. Cells were rested for 36–48 h prior to stimulation. HEK293 null 1 (Invivogen) cells are HEK293 cells stably transfected with an NF-κB/AP-1 reporter. They were grown in high-glucose DMEM supplemented with 10% FCS, 2 mM sodium pyruvate and 1 mM l-glutamine, with the addition of 100 μg/ml normocin every third passage. MG-132 was from EMD Millipore, and bortezomib and carfilzomib were from Selleck chemicals. z-YVAD-fmk and z-IETD-fmk were from R&D systems. VX-765 was from Invivogen. AEBSF-HCl was from Enzo Lifesciences.
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9

Investigating Cellular Pathways with Diverse Reagents

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The following reagents were used: Ivermectin (Sigma I8898-250MG), KN-93 (Tocris, 5215-1 MG), Cyclosporin A (Tocris, 1101–100 MG), KN-62 (Tocris, 1277-1 MG), PSB 069 (Santa Cruz, sc-204216 10 MG), DCPIB (Tocris, 1540–10 MG), A438079 (Tocris, 2972–10 MG), z-vad-fmk (Enzo Life Sciences, ALX-260-020-M001-1 MG), vx765 (InvivoGen, inh-vx765-1-10MG), oxATP (Sigma Aldrich, A6779–25MG), PPAD (Sigma Aldrich, P178–10MG), DPI (Sigma Aldrich, D2926–10 MG), NAC (Sigma Aldrich, A9165–25 MG), Suramin (Sigma Aldrich, S2671–100 MG), Necrostatin (Enzo Life Sciences, BML-AP309–0020–20 MG), Digoxin (Sigma Aldrich, D6003–100 MG), Apyrase (New England Biolabs, M0393S–10,000 milliunits), ATP (Sigma Aldrich, A2383–1G), Pannexin-1-Inhibitor (AnaSpec, 61911–1 MG), Probenecid (Sigma Aldrich, P8761–25 G), YOPRO-1 Iodide (Life Technologies, Y3603-1 mL), GSH (Sigma Aldrich, G4251–1 G).
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10

Inhibition of Inflammatory Pathways in THP-1 Macrophages

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PMA-differentiated, THP-1 macrophages were pre-incubated with the indicated amounts of either the IKK-β inhibitors TPCA-1 (Abcam, Cambridge, UK) or BMS-345541 (Abcam), the unspecific inflammasome inhibitor VX-765 (InvivoGen), which inhibits caspase-1 activity, the specific NLRP3-inflammasome inhibitor MCC950 (InvivoGen), or the MAPK inhibitors SP600125 (SAP/JNK MAPK inhibitor, InvivoGen), SB202190 (p38α/β MAPK inhibitor, InvivoGen), or U0126 (ERK MAPK inhibitor, Cell Signaling Technologies, Leiden, The Netherlands) for 90 min and subsequently stimulated with rFlaA:Betv1 for 24 h. The target molecules of the used inhibitors are summarized in Supplementary Figure 2. For viability analysis, cells were treated as indicated, stained for dead cells using the fixable viability dye eFlour780 (#65-0865-14, eBioscience), and measured using a BD LSRFortessa™ flow cytometer (BD Biosciences). Data were analyzed using FlowJo V.7 (Treestar Inc., Ashland, OR, USA) and GraphPad PRISM (GraphPad Software, San Diego, California, USA).
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