Which cytokine is most associated with IgE production?

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Multiple Choice

Which cytokine is most associated with IgE production?

IgE production is driven most strongly by IL-4. This cytokine directs B cells to switch their antibody production from other isotypes to IgE through a process called class-switch recombination. IL-4 binds to its receptor on B cells and activates the STAT6 signaling pathway, which promotes ε germline transcription and recruitment of the enzyme machinery needed to recombine the IgE constant region. This specifically pushes the B cell to produce IgE, a key player in allergic responses. Other cytokines don’t focus IgE production in the same way: IL-2 mainly supports T cell growth, IFN-γ promotes other IgG isotypes and can inhibit IgE, and IL-10 has broad anti-inflammatory and B cell–supportive roles but does not preferentially drive IgE switching.

IgE production is driven most strongly by IL-4. This cytokine directs B cells to switch their antibody production from other isotypes to IgE through a process called class-switch recombination. IL-4 binds to its receptor on B cells and activates the STAT6 signaling pathway, which promotes ε germline transcription and recruitment of the enzyme machinery needed to recombine the IgE constant region. This specifically pushes the B cell to produce IgE, a key player in allergic responses. Other cytokines don’t focus IgE production in the same way: IL-2 mainly supports T cell growth, IFN-γ promotes other IgG isotypes and can inhibit IgE, and IL-10 has broad anti-inflammatory and B cell–supportive roles but does not preferentially drive IgE switching.

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