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8 protocols using mab453

1

Murine Intracranial Aneurysm Model

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Murine intracranial aneurysms were created in female 8-12 week-old C57BL/6 mice (Charles River Laboratories, Wilmington, MA) using a method described previously.10 (link) For the antibody blockade, 100 μg/mL anti-CXCL1 antibody (MAB453, R&D Systems) or 100 μg/mL IgG2A control antibody were injected retro-orbitally every two days.
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2

Dorsal Air Pouch Inflammation Model

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Dorsal air pouches were prepared by injection of 2.5 mL of air on day 0 and day 3 in CD-1 mice, as previously described.25 (link) On day 6, mice received 0.25 mL of one of the following treatments diluted in 0.5% carboxymethyl cellulose (CMC, Sigma-Aldrich): (1) vehicle, CMC alone; (2) IL-17 (1 µg); (3) nIL-17 (1 µg); (4) IL-17 (1 µg) plus MAB421 or Ab-IPL-IL-17 (10 µg); (5) IL-17 (1 µg) plus anti-JE (10 µg, MAB479, R&D System) and (6) IL-17 (1 µg) plus anti-KC (10 µg, MAB453, R&D System). Mice were sacrificed after 24 hours, and lavage fluids were recovered, and centrifuged at 220 g for 10 min at 4°C. Cell pellets and inflammatory exudates were banked for subsequent analysis of inflammatory cyto-chemokines. The route, timing and frequency of administration as well as the selected dosages of tested compounds were selected according to updated literature.12 16 (link) Cell number was determined by TC20 automated cell counter (Bio-Rad) using Bio-Rad’s TC20 automated cell counter uses disposable slides, TC20 trypan blue dye (0.4% trypan blue dye w/v in 0.81% sodium chloride and 0.06% potassium phosphate dibasic solution, Sigma-Aldrich) and a CCD camera to count cells based on the analyses of capture images.25 (link)
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3

Bone Marrow Labeling by Microinjection

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Bone marrow tagging by microinjection were performed as previously described29 (link). Microinjection of the tibia marrow was performed sequentially under 0.3% pentobarbital anesthesia, using a 1 ml syringe mounted with a 5 mm-outer-diameter veterinary needle. For each procedure aseptic technique was used. For the tibia marrow injection, we injected at the chosen injection site of tibia plateau just below the knee and the bone wall was perforated with a veterinary needle. The red cell tracker or CXCL1/2 antibodies (Clone # 48415, R&D Systems, MAB453, 0.2 μg/ml or 5 ng/mice once; Clone # 40605, R&D Systems, MAB452, 2 μg/ml or 40 ng/mice once) was injected in the marrow cavity over 30 s. Animals were sacrificed 12 h after injection.
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4

Cytokine Profiling of Respiratory Samples

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Culture supernatants and BAL samples were assayed for IL-1β, MIP-1α, TNFα, IL-6, IL-10, IL-18, IL-17A and CXCL1 by ELISA. Antibody pairs for the IL-1β (MAB401 and BAF401; clone 30311 and polyclonal; R&D Systems; 8 and 4 μg ml−1, respectively) and CXCL1 (mouse: MAB453 and BAF453; clone 48415 and polyclonal; R&D Systems; 8 and 0.4 μg ml−1, respectively; human: MAB275, clone 20326, 4 μg ml−1; BAF275, polyclonal, 40 ng ml−1) and CCL3/ MIP-1α (Quantikine ELISA kit, Product #MMA00) ELISAs were from R&D Systems. Antibody pairs for IL-1α (capture: product #14-7011-85, clone ALF-161; detection: product #13-7111-85, polyclonal), TNFα (capture: product #14-7325-85, clone 1F3F3D4; detection: product #13-7326-85, clones MP6-XT22 and MP6-XT3), IL-6 (capture: product #14-7061-85, clone MP5-20F3; detection: product #13-7062-85, clone MP5-32C11), IL-10 (capture: product #14-7101-85, clone JES5-16E3; detection: product #13-7102-85, clone JES5-2A5) and IL-17A (capture: product #14-7175-85, clone eBio 17CK15A5; detection: product #13-7177-85, clone eBio17B7) were from eBiosciences and used at a 1:250 dilution. Antibody pairs for IL-18 were from MBL International (capture: product #D047-3, clone 74, 1:1,000; detection: product #D048-6, clone 93-10C, 1:2,000).
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5

Modulating intestinal barrier via CXCL1

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One day after the completion of the DSS treatment, mice received an intraperitoneal injection of 100 µg of either a rat anti-mouse CXCL1 (R and D Systems Cat# MAB453, RRID: AB_2087696) or a rat IgG2A isotype control (R and D Systems Cat# MAB006, RRID: AB_357349). Intestinal barrier function was assessed 3 weeks after the treatments using Ussing chambers as described above.
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6

Staphylococcus aureus Skin Abscess Protocol

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Mice were anaesthetized intraperitoneally (i.p.) with pentobarbital sodium (50 mg/kg) before shaving the dorsal area. The mice were then subcutaneously (s.c.) injected with the S. aureus strain USA300-TCH1516 (1 × 107 CFU) in 50 μL of sterile phosphate buffered saline (PBS). The abscess area was measured using a Vernier caliper and photographed with a millimetre ruler as a reference. Mice were euthanized, and the lesional skin was collected by 8 mm punch biopsies at day 2 post-infection. A portion of the skin was homogenized mechanically in cold PBS (at a ratio of 5 mL per gram tissue), and the total bacterial burden was determined by plating out serial dilutions on tryptic soy broth (TSB) agar plates. In other experiments, 100 μg of SB225002 (Selleck, Houston, TX, USA) was administered i.p. 1 h prior to infection and 23 h post-infection. The control mice received equal amounts of vehicle. 5 μg of MAB453 (R&D, Emeryville, CA, USA) was administered i.p. 1 h prior to infection and 23 h post-infection. The control mice received equal amounts of isotype IgG.
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7

Conditioned Media Effects on Fibroblasts

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For conditioned media preparation, EO771 cells were plated on 6 well plates at a density of 5×104 cells/well and cultured for 96 hours. Conditioned media were collected, centrifuged for 5min at 1500 rpm and added for 48h in 3T3 fibroblasts that had been cultured for 16 hours in serum free media on 12-well plates at a density of 5×105 cells/well. Experiments were performed in triplicates, and similar results were obtained.
For Ccl3 and Cx1 neutralization, antibodies were added in the conditioned media after their collection at concentrations 20 μg/ml for mouse monoclonal Ccl3 (MAB450; R&D Systems) and 1ug/ml for mouse monoclonal Cxcl1 (MAB453; R&D Systems).
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8

Depletion of CXCL1 or CCL2 from Conditioned Medium

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Conditioned medium was depleted of CXCL1 or CCL2 using antibodies previously loaded onto protein A/G Plus-Agarose beads (Santa Cruz Biotechnology, Dallas TX) at a ratio of 10 μL beads to 1μg antibody. Beads were washed before and after antibody loading. Antibodies were purified anti-CXCL1 (R and D systems MAB453, Minneapolis MN) used at 2 μg/mL conditioned medium, anti-CCL2 (R and D systems AF-479) at 5 μg/mL, Rat IgG2a isotype control (R and D systems MAB006) at 2 μg/mL, or goat IgG (R and D systems AB-108) at 5 μg/mL. Incubation with conditioned medium was on a rocking platform overnight at 4°C, after which the beads were pelleted and the depleted conditioned medium was collected and used for downstream applications.
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