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9 protocols using mab417

1

Malaria Infection and Cerebral Malaria Model

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C57BL/6 red blood cells infected with Plasmodium berghei ANKA parasites expressing a green fluorescent protein (PbA GFPcon 259cl2, MRA-865, deposited by CJ Janse and AP Waters) were stored in liquid nitrogen and thawed and passed into wild-type mice that served as parasite donor. All mice, unless otherwise stated, were inoculated intravenously (i.v.) into the tail vein with 1×104 parasitized red blood cells (pRBC). Parasitemia was monitored daily (from day 4) by flow cytometry using the FL3 channel (PbA-GFP) and TER-119 APC (erythrocytes) in a BD FACScalibur cytometer (BD Biosciences). Clinical score was assessed using the following clinical scale: 1 = no signs; 2 = ruffled fur and/or abnormal posture; 3 = lethargy; 4 = reduced responsiveness to stimulation and/or ataxia and/or respiratory distress/hyperventilation; and 5 = prostration and/or paralysis and/or convulsions. All animal that reachs stage 4 developped ECM. Recombinant murine IL-33 (Biolegend) was injected intraperitoneally (0.2 μg/mouse/200 μl) daily, routinely from the beginning of infection (day 0). As a control for IL-33 effects, non-infected (NI) mice also received IL-33 for 5 consecutive days. For some experiments, mice were administered with anti-Siglec F (MAB17061, R&D Systems, 50 μg daily) or anti-IL-10 (MAB417, R&D Systems, 40 μg daily) or appropriate isotype control Abs.
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2

Spleen Cell Stimulation Assay

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Single-cell suspensions from spleen were adjusted to 4.0×106 cells/mL in sterile RF10M and 2.0×105 cells dispensed into wells of a sterile 96-well flat bottom plate (Corning #353072) The cells were mixed with an equal volume of RF10M lacking or containing the following reagents (source and final concentration shown in parentheses): LPS (Sigma, L2880, 10 μg/mL), IL10 blocking antibody (R&D Systems, MAB417, 10 ng/mL), Rat IgG1 control for IL10 blocking antibody (R&D Systems, MAB005, 10 ng/mL in PBS), recombinant mouse IL10 (Biolegend, 575802, 100 ng/mL), ruxolitinib (Selleckchem, S1378, 10 nM), SH-4–54 (Selleckchem, S7337, 10 nM), or triamcinolone acetonide (Alfa Aesar, J6354803, 10 nM). DMSO was used as a vehicle control for the small molecule inhibitors. Cells were cultured for 72h at 37 °C in a humidified incubator with 5% CO2.
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3

Targeting IL-10 and TGF-β in Colitis

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Mice in DSS + PC group were further intraperitoneally injected with 50 μg mouse anti-IL-10 and/or anti-TGF-β-1, -2, -3 antibodies (MAB417 and MAB1835, R&D Systems, Minnesota, USA) on day 0. This regimen was followed by intraperitoneal injections of 100 μg antibodies on day 2, and an additional 50 μg antibody on days 4 and 6. Control groups received equivalent amounts of rat-IgG or mouse-IgG (R&D Systems), following the same protocol50 (link).
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4

Microglia Modulation of NPC Proliferation

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NPC neurospheres were dissociated into single cells and plated onto PDL-coated multi-chamber glass slides (25,000 cells per chamber) (LabTek II) in SFM. One day following cell plating, the media was changed to 50% NPC SFM and 50% MCM. The following experimental groups were assessed: (1) MCM alone—50% NPC SFM + 50% fresh microglia media; (2) M0—50% NPC SFM + 50% M0 MCM; (3) M1—50% NPC SFM + 50% M1 MCM; (4) M2—50% SFM + 50% M2 MCM. The polarizing factors used to convert microglia to an M1 and M2 phenotype were used as controls at their respective concentrations. IL-10 neutralizing antibody (R&D Systems, MAB417, 0.8 μg/ml) was used to assess the overall effect of IL-10 on NPC proliferation and differentiation. Assessment of NPC proliferation (1 day post MCM treatment) and differentiation (7 days post MCM treatment) was accomplished as described above.
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5

Stroke Core Tissue Isolation and Culture

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Mice were subjected to stroke surgeries as discussed above. 3 days after stroke, the visible infarct core regions from the mice were carefully dissected, pooled, and then dissociated in trypsin + EDTA. The pooled tissue suspension was centrifuged, washed with PBS, and resuspended with DMEM + 10% FBS, and plated on polystyrene tissue culture plates or into CS-A hydrogel. Following culture overnight, non-adherent cells and stroke core debris were removed, and the media was replaced. For the IL-10 neutralization experiments, 1 μg/μL anti-IL-10 antibody (R&D Systems, MAB417) was added to the cell culture media.
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6

Regulatory B Cell-Mediated T-Cell Suppression

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T-cell suppression assay by regulatory B cells was performed70 (link). Briefly, WT or slamf5−/− B cells were first purified by B220+ magnetic beads and then transitional 2 (T2) B cells were isolated by sorting from spleens of mice in remission from EAE, and cultured 1:1 or 2:1 with WT or slamf5−/− CD4+CD25 T cells isolated by sorting for 72 h in the presence of 1 μg ml−1 anti-CD3 (17A2; Biolegend) and 3 mg ml−1 anti-CD28 (3751; Biolegend). To neutralize IL-10, cells were incubated with 10 μg ml−1 of mouse IL-10 antibody (MAB417, R&D systems) or with IgG1-control (Biolegend).
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7

Enteroid Treatment with IL-10 and Antibody

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Enteroids were treated with 1 μM 4OHT alone or together with 100 ng/mL mouse IL-10 (417-ML; R&D Systems). In some experiments, enteroids were co-cultured with splenocytes with or without rat anti-mouse IL-10 antibody (MAB417; R&D Systems).
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8

Regulation of B10 Cell Differentiation by MDSCs

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Mononuclear cells separated from naive mouse spleen were cultured alone or with MDSCs in the presence or absence of 10 μg/ml lipopolysaccharides (LPS) (Sigma, No. L4391-1MG) for 72 h; the ratio of nonadherent PBMCs to MDSCs was 3:1. Mouse mononuclear cells isolated from naive mouse spleens by density gradient centrifugation were cultured alone or with MDSCs in the presence or absence of 10 μg/ml mouse BAFFR/TNFRSF13C antibody or mouse IL-10 antibody (R&D Systems, Minneapolis, MN, USA, AF1357; MAB417). Mononuclear cells separated from naive mouse spleen were cultured alone or with MDSCs in the presence or absence of 5 μM WP1066 (MCE, No. HY-15312) or 0.5 μM colivelin (MCE, No. HY-P1061).
Finally, the differentiation ratio of B10 cells induced by MDSCs was detected by FACS, and the phenotype of B10 cells was CD19+ CD1d+ CD5+.
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9

Continuous Cisterna Magna Administration of Compounds

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Mice were anesthetized with an IP injection of butorphanol (5.0 mg/kg), midazolam (4.0 mg/kg), and medetomidine (0.75 mg/kg). A small hole was made in the occipital bone after a small incision was made in the head skin, and a polyethylene tube (0.8 mm in diameter; Natsume, Tokyo, Japan) connected to an osmotic mini pump (0.5 µL/h, Alzet model 2002; Durect Corporation, Cupertino, CA, USA) was inserted into the cisterna magna through the hole [13 (link)]. Following this, 10602-R10N1 (500 μg/mL dissolved in 0.01 M PBS, 0.11 μL/h, Sino Biological, Beijing, China), MAB417 (500 μg/mL dissolved in 0.01 M PBS, 0.11 μL/h, R&D Systems, Minneapolis, MN, USA), or ab269199 (0.1 mg/mL, dissolved in 0.01 M PBS, 0.11 μL/h, Abcam, Cambridge, UK) was continually provided via ICM administration for 21 days after the left palatal mucosa incision via the osmotic mini pumps. MHWT was measured daily in each group as described above.
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