June 17, 2024ImmunologyOpen Access

IL‐2 amplifies quantitative TCR signalling inputs to drive Th1 and Th2 differentiation

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Th1 differentiation occurs with strong TCR signalling, while weak TCR signalling induces Th2 responses.
Notably, the presence of IL-2 is crucial for TCR-dependent differentiation in CD4+ T-cells.
This work involves an analysis of how IL-2 amplifies transcription factors like GATA3 and Tbet during differentiation processes with quantitative measures of TCR signalling strength. Observations indicate that absence of IL-2 means TCR driven differentiation is completely halted despite initial activatory responses being present.

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Randomized trial illustrates IL-2's role in TCR-dependent differentiation of CD4+ T-cells, highlighting its significance.

Al‐Aghbar et al. (2024) studied this question.

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