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Bv610

Manufactured by Beckman Coulter

The BV610 is a fluorescence-based detection system designed for use in flow cytometry applications. It provides high-sensitivity detection and quantification of fluorescently-labeled biological samples.

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4 protocols using bv610

1

Multiparameter Immune Responses Assessment

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SIV-specific cellular immune responses were assessed by IFN-γ ELISPOT assays and multiparameter ICS assays essentially as described4 (link). Estimates of cellular immune breadth involved IFN-γ ELISPOT assays using subpools of 10 peptides across the Gag, Pol, and Env proteins. 12-color ICS assays were performed with the Aqua green-fluorescent reactive dye (Invitrogen, L23101) and predetermined titers of mAbs (Becton-Dickinson) against CD3 (SP34; Alexa Fluor 700), CD4 (OKT4; BV711, Biolegend), CD8 (SK1; allophycocyanin-cyanine 7 [APC-Cy7]), CD28 (L293; BV610), CD95 (DX2; allophycocyanin [APC]), CD69 (TP1.55.3; phycoerythrin-Texas red [energy-coupled dye; ECD]; Beckman Coulter), gamma interferon (IFN-γ) (B27; phycoerythrin-cyanine 7 [PE-Cy7]), Ki67 (B56; fluorescein isothiocyanate [FITC]), CCR5 (3A9; phycoerythrin [PE]), CCR7(3D12; Pacific Blue), and PD-1(EH21.1; peridinin chlorophyll-A-cyanine 5.5 [PerCP-Cy5.5]). IFN-γ backgrounds were consistently <0.01% in PBMC.
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2

Multiparameter Immune Responses Assessment

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SIV-specific cellular immune responses were assessed by IFN-γ ELISPOT assays and multiparameter ICS assays essentially as described4 (link). Estimates of cellular immune breadth involved IFN-γ ELISPOT assays using subpools of 10 peptides across the Gag, Pol, and Env proteins. 12-color ICS assays were performed with the Aqua green-fluorescent reactive dye (Invitrogen, L23101) and predetermined titers of mAbs (Becton-Dickinson) against CD3 (SP34; Alexa Fluor 700), CD4 (OKT4; BV711, Biolegend), CD8 (SK1; allophycocyanin-cyanine 7 [APC-Cy7]), CD28 (L293; BV610), CD95 (DX2; allophycocyanin [APC]), CD69 (TP1.55.3; phycoerythrin-Texas red [energy-coupled dye; ECD]; Beckman Coulter), gamma interferon (IFN-γ) (B27; phycoerythrin-cyanine 7 [PE-Cy7]), Ki67 (B56; fluorescein isothiocyanate [FITC]), CCR5 (3A9; phycoerythrin [PE]), CCR7(3D12; Pacific Blue), and PD-1(EH21.1; peridinin chlorophyll-A-cyanine 5.5 [PerCP-Cy5.5]). IFN-γ backgrounds were consistently <0.01% in PBMC.
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3

Multiparameter Flow Cytometry for SIV Immunity

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SIV-specific cellular immune responses were assessed by IFN-γ ELISPOT assays and multiparameter ICS assays essentially as previously described9 (link). 12-color ICS assays were performed with the Aqua green-fluorescent reactive dye (Invitrogen, L23101) and predetermined titers of mAbs (Becton-Dickinson) against CD3 (SP34; Alexa Fluor 700), CD4 (OKT4; BV711, Biolegend), CD8 (SK1; allophycocyanin-cyanine 7 [APC-Cy7]), CD28 (L293; BV610), CD95 (DX2; allophycocyanin [APC]), CD69 (TP1.55.3; phycoerythrin-Texas red [energy-coupled dye; ECD]; Beckman Coulter), gamma interferon (IFN-γ) (B27; phycoerythrin-cyanine 7 [PE-Cy7]), Ki67 (B56; fluorescein isothiocyanate [FITC]), CCR5 (3A9; phycoerythrin [PE]), CCR7(3D12; Pacific Blue), and PD-1(EH21.1; peridinin chlorophyll-A-cyanine 5.5 [PerCP-Cy5.5]). IFN-γ backgrounds were consistently <0.01% in PBMC.
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4

Comprehensive T Cell Phenotyping by Flow Cytometry

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The differentiation profiles, activation, exhaustion, and senescence of CD4+ and CD8+ T cells were analyzed by flow cytometry, using a dried reagent tube (DuraClone IM T cell subsets tube, Beckman Coulter, Hialeah, FL, USA). The DuraClone tube contained the following antibodies: CD45RA-FITC, CCR7-PE, CD28-ECD, PD1-PC5.5, CD27-PC7, CD4-APC, CD8-A700, CD3-APCA750, CD57-Pacific Blue, and CD45-Krome Orange. We added the anti-CD38 antibody BV610 (Beckman Coulter) to the Duraclone tube. Briefly, PBMC were defrosted in complete medium (RPMI-1640 supplemented with 10% fetal bovine serum, 2 mmol glutamine, 50 IU/mL penicillin, and 50 µg/mL streptomycin; EuroClone, Milan, Italy), added to the DuraClone tube and incubated for 15 min, at room temperature. After incubation, VersaLyse Lysing Solution (Beckman Coulter) was added and incubated for 15 min. Finally, samples were washed with PBS 1X, fixed with paraformaldehyde 1X, and then acquired by DxFLEX (Beckman Coulter). Samples were analyzed using DxFLEX software 2.0 (Beckman Coulter). The combined positivity to the pair of CD45RA/CCR7 immunity surface markers on CD4+ and CD8+ T cells was used to assess the percentages of naïve (CD45RA+ CCR7+), central memory (CM, CD45RA-CCR7+), effector memory (EM, CD45RA-CCR7−), and terminally differentiated effector memory (TEMRA, CD45RA+CCR7−) cells, as in [21 (link)].
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