Louis, MO) containing 1 mg/mL of Mycobacterium tuberculosis strain H37RA, and was subsequently boosted every 2 weeks with 2OA-BSA in incomplete Freund’s adjuvant (Sigma-Aldrich). Additionally, mice received 100 ng of pertussis toxin selleck products (List Biological Laboratories, Campbell, CA) at the time of initial immunization with 2OA-BSA in Complete Freund’s Adjuvant. Peripheral blood samples from individual mice were obtained from the tail vein prior to the initiation of treatment with mAbs (baseline) and then at 2-week intervals. Sera was collected prior to mAb treatment, 1 week afterward, and thereafter every 4 weeks, and stored at −70°C until

use. Animals were sacrificed at 15 weeks of age. Serum titers of anti–PDC-E2 autoantibodies were measured by way of enzyme-linked immunosorbent assay using our well-standardized recombinant autoantigens.32 Peripheral blood mononuclear cells were isolated from heparinized murine blood using Accupaque (Accurate Chemical & Scientific Company, Westbury, CT) to assess levels of B cells. Cells were preincubated with anti-mouse FcR blocking reagent and then incubated at 4°C with a predetermined optimum concentration of antigen-presenting cell (APC)-conjugated anti–T cell receptor β (BioLegend), phycoerythrin-conjugated anti-mouse IgM

(Caltag), and fluorescein isothiocyanate–conjugated anti-CD19 selleck chemicals (BioLegend); B cell frequency was then determined by way of flow cytometry. The liver and spleens were collected from mice immediately following sacrifice, and single-cell mononuclear cell suspensions

were prepared for multicolor flow analysis as described.23 Immediately after sacrifice, liver and spleen tissues were harvested and fixed in 10% buffered formalin, embedded in paraffin, and cut into 4-μm sections for routine hematoxylin (DakoCytomation, Carpinteria, BCKDHA CA) and eosin (American Master Tech Scientific, Lodi, CA) staining. Evaluation under light microscopy and scoring of liver inflammation was performed on coded hematoxylin and eosin–stained sections of liver using a set of three indices by a blinded pathologist (K. T.); indices included degrees of portal inflammation, parenchymal inflammation, and bile duct damage.33 Phenotypic analysis of bile duct damage was performed as described.34 Serum levels of alanine aminotransferase (ALT), aspartate aminotransferase (AST), and alkaline phosphate (ALP) levels were measured using the Roche Diagnostics COBAS INTEGRA 400 Plus (Indianapolis, IN). Serum levels of the proinflammatory cytokines interleukin (IL)-6, IL-10, monocyte chemotactic protein-1 (MCP-1), interferon-γ (IFN-γ), tumor necrosis factor α, and IL-12p70 were quantified using the BD Cytometric Bead Array Mouse Inflammatory Kit (BD Biosciences) as described.35 The serum samples were loaded onto the plate neat.