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Two-color flow cytometric analysis of CD40 expression on mouse splenocytes. Mouse splenic leucocytes were stained with FITC Rat Anti-Mouse CD4 (Cat. No. 553047/553046/561835) and FITC Rat Anti-Mouse CD8a (Cat. No. 553031/553030/561966), and either BD Horizon™ BV421 Rat IgG2a, κ Isotype Control (Cat. No. 562602; Left Panel) or BD Horizon™ BV421 Rat Anti-Mouse CD40 antibody (Cat. No. 562846; Right Panel). Two-color flow cytometric dot plots show the correlated expression of CD4 + CD8 versus CD40 (or Ig Isotype Control staining) for gated events with the forward and side light-scatter characteristics of viable splenic leucocytes. Flow cytometry was performed using a BD™ LSR II Flow Cytometer System.
Two-color flow cytometric analysis of CD40 expression on mouse splenocytes. Mouse splenic leucocytes were stained with FITC Rat Anti-Mouse CD4 (Cat. No. 553047/553046/561835) and FITC Rat Anti-Mouse CD8a (Cat. No. 553031/553030/561966), and either BD Horizon™ BV421 Rat IgG2a, κ Isotype Control (Cat. No. 562602; Left Panel) or BD Horizon™ BV421 Rat Anti-Mouse CD40 antibody (Cat. No. 562846; Right Panel). Two-color flow cytometric dot plots show the correlated expression of CD4 + CD8 versus CD40 (or Ig Isotype Control staining) for gated events with the forward and side light-scatter characteristics of viable splenic leucocytes. Flow cytometry was performed using a BD™ LSR II Flow Cytometer System.
Two-color flow cytometric analysis of CD40 expression on mouse splenocytes. Mouse splenic leucocytes were stained with FITC Rat Anti-Mouse CD4 (Cat. No. 553047/553046/561835) and FITC Rat Anti-Mouse CD8a (Cat. No. 553031/553030/561966), and either BD Horizon™ BV421 Rat IgG2a, κ Isotype Control (Cat. No. 562602; Left Panel) or BD Horizon™ BV421 Rat Anti-Mouse CD40 antibody (Cat. No. 562846; Right Panel). Two-color flow cytometric dot plots show the correlated expression of CD4 + CD8 versus CD40 (or Ig Isotype Control staining) for gated events with the forward and side light-scatter characteristics of viable splenic leucocytes. Flow cytometry was performed using a BD™ LSR II Flow Cytometer System.
Two-color flow cytometric analysis of CD40 expression on mouse splenocytes. Mouse splenic leucocytes were stained with FITC Rat Anti-Mouse CD4 (Cat. No. 553047/553046/561835) and FITC Rat Anti-Mouse CD8a (Cat. No. 553031/553030/561966), and either BD Horizon™ BV421 Rat IgG2a, κ Isotype Control (Cat. No. 562602; Left Panel) or BD Horizon™ BV421 Rat Anti-Mouse CD40 antibody (Cat. No. 562846; Right Panel). Two-color flow cytometric dot plots show the correlated expression of CD4 + CD8 versus CD40 (or Ig Isotype Control staining) for gated events with the forward and side light-scatter characteristics of viable splenic leucocytes. Flow cytometry was performed using a BD™ LSR II Flow Cytometer System.
Two-color flow cytometric analysis of CD40 expression on mouse splenocytes. Mouse splenic leucocytes were stained with FITC Rat Anti-Mouse CD4 (Cat. No. 553047/553046/561835) and FITC Rat Anti-Mouse CD8a (Cat. No. 553031/553030/561966), and either BD Horizon™ BV421 Rat IgG2a, κ Isotype Control (Cat. No. 562602; Left Panel) or BD Horizon™ BV421 Rat Anti-Mouse CD40 antibody (Cat. No. 562846; Right Panel). Two-color flow cytometric dot plots show the correlated expression of CD4 + CD8 versus CD40 (or Ig Isotype Control staining) for gated events with the forward and side light-scatter characteristics of viable splenic leucocytes. Flow cytometry was performed using a BD™ LSR II Flow Cytometer System.
Two-color flow cytometric analysis of CD40 expression on mouse splenocytes. Mouse splenic leucocytes were stained with FITC Rat Anti-Mouse CD4 (Cat. No. 553047/553046/561835) and FITC Rat Anti-Mouse CD8a (Cat. No. 553031/553030/561966), and either BD Horizon™ BV421 Rat IgG2a, κ Isotype Control (Cat. No. 562602; Left Panel) or BD Horizon™ BV421 Rat Anti-Mouse CD40 antibody (Cat. No. 562846; Right Panel). Two-color flow cytometric dot plots show the correlated expression of CD4 + CD8 versus CD40 (or Ig Isotype Control staining) for gated events with the forward and side light-scatter characteristics of viable splenic leucocytes. Flow cytometry was performed using a BD™ LSR II Flow Cytometer System.
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The 3/23 clone monoclonal antibody specifically binds to CD40, a 40-50 kDa glycoprotein expressed on B lymphocytes and other antigen-presenting cells. CD40 has been reported to be transiently expressed on activated CD4+ and CD8+ T cells and in some mouse strains, the 3/23 mAb has been reported to react with 5-10% of T lymphocytes in adult mouse, but not neonatal, spleen. CD40 plays a key role in B-cell growth and differentiation where interactions of CD40 with its ligand, CD154, are involved in the initiation, effector, and memory stages of cell-mediated immune responses. In addition, CD40 has been reported to be involved with the triggering of NK cells and NK-T cells. Ligation of CD40 with the 3/23 antibody has been reported to induce splenic B cells to express the costimulatory molecule CD86 (B7-2). In addition, although the 3/23 antibody by itself is a weak B-cell mitogen, it has been reported to synergize markedly with mitogenic anti-IgM, anti-IgD mAb or IL-4 to promote B-cell proliferation.
The antibody was conjugated to BD Horizon™ BV421 which is part of the BD Horizon™ Brilliant Violet™ family of dyes. With an Ex Max of 407-nm and Em Max at 421-nm, BD Horizon™ BV421 can be excited by the violet laser and detected in the standard Pacific Blue™ filter set (eg, 450/50-nm filter). BD Horizon™ BV421 conjugates are very bright, often exhibiting a 10 fold improvement in brightness compared to Pacific Blue™ conjugates.
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