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4 protocols using cd4 qdot655 s3

1

Multicolor Flow Cytometry Cell Sorting

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Mononuclear cell preparations were incubated in FACS staining buffer (PBS with 2% FBS and 2 mM EDTA) with fluorochrome-conjugated anti-human surface monoclonal antibodies (mAbs). Antibodies used included: CD3 Alexa-700 (SP34-2, BD Biosciences), CD14 Qdot605 (Tuk4, Invitrogen), CD16 FITC (3G8, BD PharMingen), HLA-DR PE-Cy7 (G46-6, BD Biosciences), CD4 Qdot655 (S3.5, Life Technologies), CD45RA ECD (3P, Beckman Coulter), CD27 APC-eFluor780 (O323, eBiosciences), CD25 PE(PC61, BD Biosciences), and CD8 PE(SK1, BD Biosciences). All cells were stained with a live/dead marker (Amine-Aqua/AmCyan; Invitrogen) to exclude dead cells from the analysis and sorting. Cells were then sorted by FACS (FACS Aria, BD Biosciences) into PBS. These cells were then re-sorted to a purity of greater than 99% directly into RNAqueous Micro lysis buffer (Ambion – Life Technologies). For Fluidigm qRT-PCR, cells were sorted into Cells Direct 2x Reaction Mix (Life Technologies).
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2

Multiparameter Flow Cytometry of T Cell Subsets

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Methods have been previously reported [20 (link)]. Briefly, cryopreserved PBMCs were thawed and stained with surface antibodies against CD3-APCefluor780 (UCHT1; eBiosciences, San Diego, CA); CD4-Qdot 655 (S3.5) and CD8-Qdot 605 (3B5) (both from Life Technologies, Eugene, OR); CXCR3-APC-CD183 (1C6), CCR4 BV421-CD194 (1G1), CCR5-PE-Cy7-CD195 (2D7), CCR7-Alexa Fluor700-CD197 (150503), CD38-FITC (HB7) and HLA-DR-PE (L243) (all from BD Biosciences, San Jose, CA). Cells were then incubated for 30 minutes and centrifuged at 1200 rpm for 10 minutes. PBMCs were fixed with 2% formalin before analysis. Stained cells were acquired using an LSR II flow cytometer (BD Immunocytometry Systems, San Jose, CA). Using 10-color flow cytometric analysis, we investigated T cell phenotypes classified by the markers listed above. Data were analyzed using FlowJo software (v9.8.5, TreeStar, Ashland, OR). Lymphocytes were analyzed based on forward scatter (FSC) and side scatter (SSC) profiles. A single cell population was selected with SSC-A vs. SSC-H and then with FSC-A vs. FSC-H before gating for other markers. Gates were set based on Fluorescence Minus One (FMO) control.
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3

Multiparameter Flow Cytometry for PBMC and MMC Characterization

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PBMCs and MMCs were stained with fluorescent antibodies against cell surface markers and analyzed using 10-color flow cytometry by previously reported methodology [3 (link)]. Briefly, PBMCs and MMCs were labeled with LIVE/DEAD fluorescent reactive dye (Invitrogen, Carlsbad, CA) and stained with surface antibodies against CD3-APCefluor780 (UCHT1; eBiosciences, San Diego, CA); CD4-Qdot 655 (S3.5) and CD8-Qdot 605 (3B5) (both from Life Technologies, Eugene, OR); CXCR3-APC-CD183 (1C6), CCR4 BV421-CD194 (1G1), CCR5-PE-Cy7-CD195 (2D7), CCR7-Alexa Fluor700-CD197 (150503), CD38-FITC (HB7) and HLA-DR-PE (L243) (all antibodies were purchased from BD Biosciences, San Jose, CA). Cells were then incubated for 30 minutes and centrifuged at 1200 rpm for 10 minutes. Both PBMCs and MMCs were fixed with 2% formalin before analysis. Using an LSR II flow cytometer (BD Immunocytometry Systems, San Jose, CA), CD3+ events were acquired from each sample. Data were analyzed using FlowJo software (v9.8.5, TreeStar, Ashland, OR). Lymphocytes analysis was based on forward and side scatter profiles after exclusion of dead cells (Fig 1). Gates were either set using negative sample or Fluorescence Minus One (FMO) control and were then applied to all samples from each participant.
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4

Multicolor Flow Cytometry Cell Sorting

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Mononuclear cell preparations were incubated in FACS staining buffer (PBS with 2% FBS and 2 mM EDTA) with fluorochrome-conjugated anti-human surface monoclonal antibodies (mAbs). Antibodies used included: CD3 Alexa-700 (SP34-2, BD Biosciences), CD14 Qdot605 (Tuk4, Invitrogen), CD16 FITC (3G8, BD PharMingen), HLA-DR PE-Cy7 (G46-6, BD Biosciences), CD4 Qdot655 (S3.5, Life Technologies), CD45RA ECD (3P, Beckman Coulter), CD27 APC-eFluor780 (O323, eBiosciences), CD25 PE(PC61, BD Biosciences), and CD8 PE(SK1, BD Biosciences). All cells were stained with a live/dead marker (Amine-Aqua/AmCyan; Invitrogen) to exclude dead cells from the analysis and sorting. Cells were then sorted by FACS (FACS Aria, BD Biosciences) into PBS. These cells were then re-sorted to a purity of greater than 99% directly into RNAqueous Micro lysis buffer (Ambion – Life Technologies). For Fluidigm qRT-PCR, cells were sorted into Cells Direct 2x Reaction Mix (Life Technologies).
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