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Numasaki, M. et al.

Numasaki, Tomioka, Takahashi, Sasaki,

IL-17 and IL-17F modulate GM-CSF production by lung microvascular endothelial cells stimulated with IL-1beta and/or TNF-alpha.

In this study, we investigated the roles of CD4 T cell cytokines IL-17 and IL-17F in GM-CSF production from lung microvascular endothelial cells (LMVECs). While a wide range of doses of IL-17 or IL-17F alone did not induce GM-CSF release from LMVECs, IL-17 had an enhancing effect on macrophage-derived IL-1beta- and TNF-alpha- induced GM-CSF mRNA expression and production, whereas IL-17F had an enhancing effect on IL-1beta- induced GM-CSF production, but a marked inhibitory effect on TNF-alpha-induced secretion. GM-CSF production was further enhanced with the combination of three cytokines IL-1beta, TNF-alpha and IL-17 or IL-17F. Additionally, when Th1 or Th2 cytokine was combined with IL-1beta or TNF-alpha, both Th1 and Th2 cytokines had a modest stimulatory effect on TNF-alpha- induced GM-CSF production, whereas IL-4 and IFN-gamma profoundly attenuated IL-1beta-induced secretion. Moreover, the regulation by IL-17 plus Th1 or Th2 cytokine of GM-CSF production from LMVECs treated with IL-1beta or TNF-alpha was dependent on the concentration of IL-17. Our findings indicate that IL-17 and IL-17F play a differential regulatory role in GM-CSF production by LMVECs stimulated with IL-1beta and/or TNF-alpha, which is sensitive to Th1 and Th2 cytokine modulation.[1]

References

IL-17 and IL-17F modulate GM-CSF production by lung microvascular endothelial cells stimulated with IL-1beta and/or TNF-alpha. Numasaki, M., Tomioka, Y., Takahashi, H., Sasaki, H. Immunol. Lett. (2004) [Pubmed]

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