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2 protocols using anti il7r

1

Characterization of Antigen-Specific T Cell Responses

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Flow cytometry and tetramer were performed as previously described55 (link). Briefly, single cell suspended splenocytes were incubated with gp33-tetramer and np396-tetramer for 15 minutes and gp-66 tetramer for 30 minutes at 37 °C. After the incubation, surface antibodies were added, including anti-CD8 or anti-CD4 along with anti-IL7R, anti-PD-1, anti-CD62L, anti-CD44, anti-KLRG-1, anti-TIM3, anti-Lag-3, and anti-2B4 antibodies (eBioscience) for 30 minutes at 4 °C. For intracellular cytokine stain single suspended splenocytes were incubated with the LCMV specific peptides gp33 and np396 or the MHC-II epitope gp61. After 1 h, Brefeldin A (eBioscience) was added, followed by an additional 5 h incubation at 37 °C. After surface stain with anti-CD8 or anti-CD4 antibodies (eBioscience) cells were fixed with 2% formalin and permeabilized with 0.1% Saponin and stained with anti-IFNγ and anti-TNF antibodies (eBioscience) for 30 min at 4 °C.
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2

Immunostaining Protocol for Human Antibodies

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Human Antibodies:

PE-conjugated anti-CD127, APC-conjugated anti-CD25, PerCP-conjugated anti-CD4 used for staining and in sorting was provided by Becton-Dickenson (BD Pharmingen, San Diego, Calif.). Alexa488-conjugated anti-FoxP3 was purchased from BioLegend (San Diego, Calif.) and intracellular staining was performed according to manufacturer's instructions as modified as follows: 5×105 cells were stained with cell surface markers for 30 min at 4° C. and fixed for 30 min using 1× Fix/Perm buffer. After 3 washes cells were permeabilized in Perm buffer with DNase I (Sigma-Aldrich, St. Louis, Mo.) for 30 min followed by 3 washes. Then cells were blocked with human IgG and stained with anti-human FoxP3-Alexa488 conjugated (BioLegend, San Diego, Calif. clone 206D). The following anti-mouse antibodies were purchased from the indicated sources: anti-CD4, anti-CD25 and mouse IgGi (isotype control) (BD Pharmingen, San Diego, Calif.); and anti-IL-7R (eBioscience, San Diego, Calif.).

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