Isolation of MiHA specific T-cells by pMHC tetramer pull down
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Prior to isolation of peptide-specific T-cells, pMHC tetramers were made coupled to SA-PE.
- PBMC were stained with pMHC tetramers for 1 hour at 4°C.
- Subsequently, cells were washed and incubated with anti-PE Ab coated magnetic beads .
- Cells were than isolated by MACS , using an LS column, following the manufacturers protocol.
- Eluted cells were washed and cultured in Iscove Modified Dulbecco Medium (IMDM; ) supplemented with 5% human serum, 5% fetal calf serum (FCS), 100 IU/mL IL-2 , 10ng/mL IL-15 .
- Eluted cells were cultured per 5000 cells with 2×104 irradiated autologous feeder cells and 5000 anti-CD3/CD28 Dynabeads in 96-well plates.
- Cultures were split at least twice a week.
- After 2–3 weeks, cell cultures were analyzed for peptide-specific T-cell populations by pMHC tetramer flow cytometry.
- Subsequently pMHC tetramer reactive T-cell populations were sorted on a FACSAria into 96 well plates containing 1×105 irradiated feeder cells supplemented…
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Prior to isolation of peptide-specific T-cells, pMHC tetramers were made coupled to SA-PE.
- PBMC were stained with pMHC tetramers for 1 hour at 4°C.
- Subsequently, cells were washed and incubated with anti-PE Ab coated magnetic beads .
- Cells were than isolated by MACS , using an LS column, following the manufacturers protocol.
- Eluted cells were washed and cultured in Iscove Modified Dulbecco Medium (IMDM; ) supplemented with 5% human serum, 5% fetal calf serum (FCS), 100 IU/mL IL-2 , 10ng/mL IL-15 .
- Eluted cells were cultured per 5000 cells with 2×104 irradiated autologous feeder cells and 5000 anti-CD3/CD28 Dynabeads in 96-well plates.
- Cultures were split at least twice a week.
- After 2–3 weeks, cell cultures were analyzed for peptide-specific T-cell populations by pMHC tetramer flow cytometry.
- Subsequently pMHC tetramer reactive T-cell populations were sorted on a FACSAria into 96 well plates containing 1×105 irradiated feeder cells supplemented with 0.5 µg/mL phytohaemagglutinin (PHA ) as previously described
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Cell isolation and culture
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Peripheral blood mononuclear cells (PBMC) from CLL patients or healthy donors were separated from heparinized venous blood by Ficoll density gradient centrifugation.
- The PBMC used in this study were generally greater than 90% CLL B cells as determined by CD19/CD5 positivity.
- Leukemic cells were cultured in serum-free adoptive immunotherapy media-V medium'>(AIM-V) medium .
- For CLL B cell activation experiments, cells were cultured for 5 days in AIM-V media or AIM-V media supplemented with 2.5 µg/ml CpG ODN 2006 (provided by core Mayo Clinic facility) with or without 94 IU/ml human IL-2 , 10 ng/ml human IL-15 , and 13 µM beta-mercaptoethanol.
- Further CLL B cell activation experiments utilized 12-O-tetradecanoylphorbol-13-acetate (TPA) at 10 ng/ml or interferon-α 2b at 1000 IU/ml.
- Human C4+T cells were isolated from healthy donor PBMC by immunomagnetic selection using T cell enrichment kits and incubated with CLL B cells…
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Peripheral blood mononuclear cells (PBMC) from CLL patients or healthy donors were separated from heparinized venous blood by Ficoll density gradient centrifugation.
- The PBMC used in this study were generally greater than 90% CLL B cells as determined by CD19/CD5 positivity.
- Leukemic cells were cultured in serum-free adoptive immunotherapy media-V medium'>(AIM-V) medium .
- For CLL B cell activation experiments, cells were cultured for 5 days in AIM-V media or AIM-V media supplemented with 2.5 µg/ml CpG ODN 2006 (provided by core Mayo Clinic facility) with or without 94 IU/ml human IL-2 , 10 ng/ml human IL-15 , and 13 µM beta-mercaptoethanol.
- Further CLL B cell activation experiments utilized 12-O-tetradecanoylphorbol-13-acetate (TPA) at 10 ng/ml or interferon-α 2b at 1000 IU/ml.
- Human C4+T cells were isolated from healthy donor PBMC by immunomagnetic selection using T cell enrichment kits and incubated with CLL B cells at a ratio of 1∶2 in plates pre-coated with PBS containing 10 µg/ml of anti-C3 and anti-C28 (B) stimulating antibodies.
- All cells were maintained in appropriate media at 37°C in an atmosphere containing 95% air and 5% CO2.
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PAF-stimulated Th17 development is dependent on cytokines, LC-T cell contact and selected signaling pathways.
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(a) Monocyte-derived LC were stimulated with either vehicle or PAF in the presence of neutralizing Ab to IL-15, IL-6R, and/or IL-23, or control Ig, and cocultured with antiCD3/CD28-activated CD4+ T cells for 5 days.
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Donor APCs plus γc cytokines induce rapid expansion of CD8+CD28− T cells in culture.
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Freshly purified CD8+ T cells (2×106 per well) from healthy volunteers were stimulated by HLA-A, B and DR mismatched allogeneic APCs (1×106 per well) for 9 days in 24-well plates supplemented with IL-2 alone or a combination of IL-2, IL-7 and IL-15.
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Human in vitro iNKT cell assay
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Human iNKT cell clones have been previously described.
- Human primary iNKT cell lines were generated by expanding freshly isolated PBMC in 50 U/ml IL-2 and 5 ng/ml IL-15 in culture with 10 ng/ml α-GalCer for 14 days.
- iNKT cells were purified by PBS-57-loaded CD1d tetramer selection with magnetic beads , and were > 99% CD3+PBS-57-tet+.
- Generation of human PBMC-derived monocytes has been previously described.
- 5 × 104 iNKT cells were cultured with 5 × 104 PBMC-derived monocytes per well.
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The co-culture model system
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The in vitro model simulating the human tumor microenvironment contained 5 × 105 iDC co-cultured with 5 × 105 irradiated (3,000 rad) PCI-13 cells and autologous CD4+CD25− T cells (5 × 106) in six-well plates [2 in air at 37°C for 10 days.
- In addition, 2.5 mL aliquots of IRX-2 or X-Vivo 10 medium (control) were added to each well as well as rhIL-2 (10 IU/mL), IL-10 (20 IU/mL), and IL-15 (20 IU/mL) .
- On days 3, 6, and 9, half of the medium was removed and replaced with fresh cytokine-containing medium mixed 1:1 with medium or IRX-2.
- For cytokine assays, cells were stimulated for 16 h with anti-CD3/CD28-coated beads at the bead:cell ratio of 1:1 in complete medium'>AIM V medium without exogenous cytokines or IRX-2.
- For intracellular cytokine staining, Brefeldin A (2 μg/mL, , ) was added to the cells.
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CD56bright NK cells have a higher cytotoxic potential towards activated CD4+ T cells.
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NK cells were activated as indicated: 200 IU/mL IL-2, 25 ng/mL IL-4, 25 ng/mL IL-7, 25 ng/mL IL-9, 5 ug/mL IL-15, 100 ug/mL IL-21, 50 ug/mL IL-12, 0.25 mg/mL IL-18 or 100 U/mL IFN-αA.
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Anti-TGF-β1 partially restores the surface expression of NKG2D and 2B4 on NK cells.
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Histograms correspond to NK cells from one representative donor treated with the isotype controls (green lines), medium alone (RPMI 1640 supplemented with 10% FBS in the presence of IL-15 (10 ng/ml) and IL-2 (100 U/ml)) (black lines) and TGF-β1 (1 ng/ml) (red lines).
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Cells
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Peripheral blood lymphocytes were isolated from healthy female donors using Ficoll gradient.
- celltype'>celltype'>NK celltype'>cells were further purified by using the human celltype'>celltype'>NK cell isolation kit and the autoMACS instrument , according to the manufacturer's instructions.
- The identity of NK cells was confirmed by FACS.
- Purity was >98%.
- LILRB1-positive NK clones were grown in culture in the presence of 10 ng/ml IL-15 and then used for NK cytotoxicity assays.
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