Regulatory roles of IL-17 and IL-17F in G-CSF production by lung microvascular endothelial cells stimulated with IL-1beta and/or TNF-alpha.
The role of the interleukin (IL)-17 family members in the regulation of G-CSF production by lung microvasculature has not been elucidated yet. We therefore investigated the effects of IL-17 and IL-17F on the regulation of G-CSF production by lung microvascular endothelial cells (LMVECs). While a wide range of doses of IL-17 or IL-17F alone did not up-regulate G-CSF production from primary human LMVECs, IL-17 had an enhancing effect on macrophage-derived IL-1beta- and TNF-alpha-induced G-CSF production, whereas IL-17F had an enhancing effect on IL-1beta-induced production, but an inhibitory effect on TNF-alpha-induced secretion. G-CSF production was further enhanced with the combination of three cytokines IL-1beta, TNF-alpha and IL-17. In contrast, three cytokines IL-1beta, TNF-alpha and IL-17F were combined together, G-CSF production was less than that induced by IL-1beta or IL-1beta plus TNF-alpha or IL-17F. Moreover, IL-17 plus Th1 or Th2 cytokine had a modest stimulatory effect on TNF-alpha-induced G-CSF production, whereas IL-17 plus IFN-gamma had an inhibitory effect on IL-1beta-induced release. Similarly, IL-17F plus IL-10, IL-13 or IFN-gamma had an inhibitory effect on IL-1beta-induced production. Our findings indicate that CD4 T cell cytokines IL-17 and IL-17F play a differential regulatory role in G-CSF production by LMVECs stimulated with IL-1beta and/or TNF-alpha, which is also sensitive to Th1 and Th2 cytokine modulation.
Numasaki
Muneo
M
Department of Geriatric and Respiratory Medicine, Tohoku University School of Medicine, 1-1 Seiryo-machi, Aoba-ku, Sendai 980-8574, Japan. numasaki77@aol.com
Takahashi
Hidenori
H
Tomioka
Yoshihisa
Y
Sasaki
Hidetada
H
D002196:Capillaries / Q000166:cytology; D002460:Cell Line; D042783:Endothelial Cells / Q000276:immunology; D004730:Endothelium, Vascular / Q000276:immunology*; D016179:Granulocyte Colony-Stimulating Factor / Q000037:antagonists & inhibitors / Q000096:biosynthesis*; D006801:Humans; D006854:Hydrocortisone / Q000494:pharmacology; D007375:Interleukin-1 / Q000494:pharmacology*; D020381:Interleukin-17 / Q000494:pharmacology / Q000502:physiology*; D008168:Lung / Q000098:blood supply / Q000166:cytology / Q000276:immunology*; D018417:Th1 Cells / Q000276:immunology; D018418:Th2 Cells / Q000276:immunology; D014409:Tumor Necrosis Factor-alpha / Q000494:pharmacology*
C440021:IL17F protein, human; D007375:Interleukin-1; D020381:Interleukin-17; D014409:Tumor Necrosis Factor-alpha; D016179:Granulocyte Colony-Stimulating Factor; D006854:Hydrocortisone