Induction of granulocyte colony-stimulating factor by globular adiponectin via the MEK-ERK pathway.
Adiponectin, an adipocyte-derived cytokine, affects a number of physiological processes, including immune function and inflammation. We investigated whether globular adiponectin (gAd) affects the expression of inflammation-related genes in murine macrophages (RAW264 cells). DNA microarray analysis indicated that granulocyte colony-stimulating factor (G-CSF) showed the largest increase in expression in gAd-stimulated RAW264 cells. The gAd-induced secretion of G-CSF increased in a time- and dose-dependent manner. U0126 (MEK1/2 inhibitor) and PD98059 (MEK1 inhibitor) reduced the gAd-induced G-CSF mRNA expression and G-CSF protein production. gAd induced the phosphorylation of MEK1/2 and ERK1/2 in RAW264 cells. In addition, the gAd-induced phosphorylation of MEK1/2 and ERK1/2 was dramatically reduced by PD98059 and U0126, respectively. Collectively, these results suggest that MEK1/2-ERK1/2 signaling is involved in the adiponectin-induced secretion of G-CSF.
Department of Preventive Dentistry, Faculty of Dental Science, Kyushu University, Fukuoka 812-8582, Japan.
Noriaki
N
Kamio
Sumio
S
Akifusa
Noboru
N
Yamaguchi
Yoshihisa
Y
Yamashita
D052242:Adiponectin / Q000494:pharmacology*; D000818:Animals; D002460:Cell Line; D004305:Dose-Response Relationship, Drug; D004791:Enzyme Inhibitors / Q000494:pharmacology; D048049:Extracellular Signal-Regulated MAP Kinases / Q000378:metabolism*; D005786:Gene Expression Regulation / Q000187:drug effects; D016179:Granulocyte Colony-Stimulating Factor / Q000235:genetics* / Q000378:metabolism; D051550:I-kappa B Kinase / Q000378:metabolism; D007249:Inflammation / Q000235:genetics; D042541:Intracellular Space / Q000187:drug effects / Q000378:metabolism; D020935:MAP Kinase Signaling System / Q000187:drug effects; D008264:Macrophages / Q000187:drug effects / Q000201:enzymology; D051379:Mice; D020929:Mitogen-Activated Protein Kinase Kinases / Q000378:metabolism*; D016328:NF-kappa B / Q000378:metabolism; D010766:Phosphorylation / Q000187:drug effects; D013997:Time Factors
D052242:Adiponectin; D004791:Enzyme Inhibitors; D016328:NF-kappa B; D016179:Granulocyte Colony-Stimulating Factor; D051550:I-kappa B Kinase; D048049:Extracellular Signal-Regulated MAP Kinases; D020929:Mitogen-Activated Protein Kinase Kinases