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IL-21 in Conjunction with Anti-CD40 and IL-4 Constitutes

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IL-21 in Conjunction with Anti-CD40 and IL-4 Constitutes

By Cellular Technology Limited

IL-21 in Conjunction with Anti-CD40 and IL-4 Constitutes

By Cellular Technology Limited
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Detection of antigen-specific memory B cells for immune monitoring requires their activation, and is commonly accomplished through stimulation with the TLR7/8 agonist R848 and IL-2. To this end, we evaluated whether addition of IL-21 would further enhance this TLR-driven stimulation approach; which it did not.

More importantly, as most antigen-specific B cell responses are T cell-driven, we sought to devise a polyclonal B cell stimulation protocol that closely mimics T cell help. Herein, we report that the combination of agonistic anti-CD40, IL-4 and IL-21 affords polyclonal B cell stimulation that was comparable to R848 and IL-2 for detection of influenza-specific memory B cells.

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