We also observed slightly increased GM-CSF expression by γδ T cells and a positive trend in B cells, however not in NK cells or CD8 + T cells.
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The sentences
We then interrogated the influence of aging on cytokine production and found that while most of the analyzed cytokines show a positive correlation with age ( 22 ), GM-CSF and IL-6 production by PBMCs display a negative trend ( Extended Data Fig.3A-C ).