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6 protocols using hla dr apc fire 750

1

Multiparametric Flow Cytometry of tPCLS

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Single‐cell suspensions of tPCLS were generated as described above. Single‐cell suspensions were blocked with FcR blocking reagent (Miltenyi Biotec) in 0.5% PBS‐BSA for 20 min, stained with fluorochrome‐conjugated antibodies, and analyzed on a FACSSymphony A5SE flow cytometer (BD Biosciences). Live single cells were identified by FSC and SSC characteristics. The data were analyzed using FlowJo V10 (TreeStar). All antibodies and secondary reagents were titrated to determine optimal concentrations. Comp‐Beads (BD) were used for single‐color compensation to create multicolor compensation matrices. For gating, fluorescence minus one control was used. The instrument calibration was controlled daily using Cytometer Setup and Tracking Beads (BD Biosciences). The following antibodies were used: CD3‐BUV805 (#612896, BD Biosciences), CD4‐BB630 (#562316, BD Biosciences), CD8‐BV650 (#743067, BD Biosciences), CD14‐PerCP‐Cy5.5 (#561116, BD Biosciences), CD15‐BUV805 (#742057, BD Biosciences), CD16‐BV650 (#563692, BD Biosciences), CD19‐APC‐H7 (#560252, BD Biosciences), CD25‐PE‐Cy7 (#557741, BD Biosciences), CD33‐BV510 (#563257, BD Biosciences), CD45‐AF700 (#368514, BD Biosciences), CD80‐BV711 (#740801, BD Biosciences), CD206‐PE/Cy7 (#321124, BioLegend), CD326‐FITC (#324203, BioLegend), HLA‐DR‐APC/Fire750 (#307658, BioLegend), MerTK‐BV421 (#367603, BioLegend).
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2

Quantifying Immune Activation Markers in HIV

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Sera samples of immunological responders and non-responders were collected to measure the bacterial translocation markers. Following the standard protocols, human Lipopolysaccharides (LPS) ELISA Kit (CUSABIO; Wuhan, China) and Human soluble CD14 (sCD14) ELISA Kit (MultiSciences, Hangzhou, China) were used to test plasma LPS and sCD14. Flow cytometry and Cobas Amplicor (Roche Molecular Systems Inc., Branchburg, New Jersey, United States) were used to quantify CD4 + /CD8 + T-cells and HIV-1 RNA, respectively. Fresh anticoagulated whole blood was used to quantify the expressing markers of immune activation (CD25 +, CD38 +, HLADR +, or CD38 + /HLA-DR +) of CD4 + and CD8 + T-cells and immune senescence (CD57 +) by BD FACS Canto II flow cytometer (BD Biosciences, California, United States). The antibodies needed during the experiment were purchased from Biolegend (San Diego, CA), including CD3-FITC, CD4- PerCP/Cy5.5, CD8-Brilliant Violet 510™, CD38-Brilliant Violet 421, CD25-PE, HLA-DR-APC/Fire™ 750, and CD57-allophycocyanin (APC).
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3

Quantifying Immune Cell Activation

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To quantify the level of activation, proliferation and cell death, cryopreserved CD4 subsets remaining from the sort were thawed. Approximately 2 million cells were stimulated with either DMSO (Sigma Aldrich, Cat no D2650-5X10ML) or PMA/ionomycin (final concentration of 10nM PMA and 0.5μM ionomycin) for 72 h. After the stimulation, 1.5 million cells were washed and surface stained for live/dead aqua, CD69 Alexa Fluor 647 (Biolegend, Cat no 310918, clone FN50), HLA-DR APC-Fire750 (Biolegend, Cat no 307658, clone L243), and CD38 V450 (BD biosciences, Cat no 561378, clone HIT2). Cells were then permeabilized using BD Cytofix/Cytoperm buffer (BD Biosciences, Cat no 554714) and stained intracellularly with Ki-67 PE (BD biosciences, Cat no 556027, clone B56). Samples were run within 2 h of staining completion on BD LSR Fortessa flow cytometer and the data was analyzed using FlowJo version 10.
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4

Quantification of T-cell Markers in HIV

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Quantifications of CD4+ and CD8+ T-cells as well as HIV-1 RNA were carried out in HIV-infected individuals using flow cytometry and Cobas Amplicor (Roche Molecular Systems Inc., Branchburg, New Jersey, USA) as the clinical routine. The percentage of CD4+ and CD8+ T cells expressing markers of activation (CD25+, CD38+, HLADR+, or CD38+/HLA-DR+) and senescence (CD57+) were quantified by the BD FACS Canto II flow cytometer (BD Biosciences, California, USA) using fresh anticoagulated whole blood. Antibody such as CD3-FITC, CD4- PerCP/Cy5.5, CD8-Brilliant Violet 510™, CD38-Brilliant Violet 421, CD25-PE, HLA-DR-APC/Fire™ 750, and CD57-allophycocyanin (APC) were purchased from Biolegend (San Diego, CA).
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5

Immunophenotyping of HIV Infection

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Quanti cations of and CD8+ as well as HIV-1 RNA were carried out in HIV-infected individuals using ow cytometry and Cobas Amplicor (Roche Molecular Systems Inc., Branchburg, New Jersey, USA) as the clinical routine. The percentage of CD4+ and CD8+ T cells expressing markers of activation (CD25+, CD38+, HLADR+, or CD38+/HLA-DR+) and senescence (CD57+) were quanti ed by the BD FACS Canto II ow cytometer (BD Biosciences, California, USA) using fresh anticoagulated whole blood. Antibody such as CD3-FITC, CD4-PerCP/Cy5.5, CD8-Brilliant Violet 510™, CD38-Brilliant Violet 421, CD25-PE, HLA-DR-APC/Fire™ 750, and CD57-allophycocyanin (APC) were purchased from Biolegend (San Diego, CA).
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6

Quantification of T-cell Subsets in HIV

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Quanti cations of CD4+ and CD8+ T-cells as well as HIV-1 RNA were carried out in HIV-infected individuals using ow cytometry and Cobas Amplicor (Roche Molecular Systems Inc., Branchburg, New Jersey, USA) as the clinical routine. The percentage of CD4+ and CD8+ T cells expressing markers of activation (CD25+, CD38+, HLADR+, or CD38+/HLA-DR+) and senescence (CD57+) were quanti ed by the BD FACS Canto II ow cytometer (BD Biosciences, California, USA) using fresh anticoagulated whole blood. Antibody such as CD3-FITC, CD4-PerCP/Cy5.5, CD8-Brilliant Violet 510™, CD38-Brilliant Violet 421, CD25-PE, HLA-DR-APC/Fire™ 750, and CD57-allophycocyanin (APC) were purchased from Biolegend (San Diego, CA).
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