PMID- 10336453 OWN - NLM STAT- MEDLINE DCOM- 19990629 LR - 20210209 IS - 0021-9258 (Print) IS - 0021-9258 (Linking) VI - 274 IP - 22 DP - 1999 May 28 TI - The role of STAT3 in granulocyte colony-stimulating factor-induced enhancement of neutrophilic differentiation of Me2SO-treated HL-60 cells. GM-CSF inhibits the nuclear translocation of tyrosine-phosphorylated STAT3. PG - 15575-81 AB - The role of granulocyte colony-stimulating factor (G-CSF) on neutrophilic differentiation of Me2SO-treated HL-60 cells was studied. G-CSF augmented the functional maturation of Me2SO-treated HL-60 cells in terms of both O-2-generating ability and expression of the formyl-methionyl-leucyl-phenylalanine receptor. G-CSF induced enhancement of cell growth in Me2SO-treated HL-60 cells. These results indicate that G-CSF is a potent enhancer for the differentiation and proliferation of Me2SO-treated HL-60 cells. G-CSF caused the activation of p70 S6 kinase but not mitogen-activated protein (MAP) kinase. On the other hand, G-CSF rapidly induced tyrosine phosphorylation of signal transducers and activators of transcription-3 (STAT3), but did not induce serine727 phosphorylation. From the analysis of confocal laser scanning fluorescence microscopy and differential centrifugation, it was clearly demonstrated that G-CSF induced nuclear translocation of tyrosine-phosphorylated STAT3. The G-CSF-dependent enhancement of neutrophilic differentiation in Me2SO-HL-60 cells was reversely inhibited by granulocyte-macrophage colony-stimulating factor (GM-CSF). Notably, in the presence of GM-CSF, G-CSF induced the tyrosine phosphorylation of STAT3 but failed to induce the nuclear translocation of tyrosine-phosphorylated STAT3. GM-CSF induced activation of not only p70 S6 kinase, but also of MAP kinase. Furthermore, GM-CSF caused the rapid serine727 phosphorylation of STAT3, both in the presence and absence of G-CSF. PD98059, an MEK1 inhibitor, inhibited the G-CSF-dependent serine727 phosphorylation of STAT3 and blocked the inhibitory effect of GM-CSF on G-CSF-dependent nuclear translocation of STAT3. These results suggest that G-CSF-dependent nuclear translocation of STAT3 coordinates with the promotion of neutrophilic differentiation in Me2SO-treated HL-60 cells. FAU - Yamaguchi, T AU - Yamaguchi T AD - Department of Biological Chemistry and Biologicals, National Institute of Health Sciences, Kamiyoga 1-18-1, Setagaya-ku, Tokyo 158-8501, Japan. FAU - Mukasa, T AU - Mukasa T FAU - Uchida, E AU - Uchida E FAU - Kanayasu-Toyoda, T AU - Kanayasu-Toyoda T FAU - Hayakawa, T AU - Hayakawa T LA - eng PT - Journal Article PL - United States TA - J Biol Chem JT - The Journal of biological chemistry JID - 2985121R RN - 0 (DNA-Binding Proteins) RN - 0 (Flavonoids) RN - 0 (STAT3 Transcription Factor) RN - 0 (STAT3 protein, human) RN - 0 (Trans-Activators) RN - 143011-72-7 (Granulocyte Colony-Stimulating Factor) RN - 21820-51-9 (Phosphotyrosine) RN - 83869-56-1 (Granulocyte-Macrophage Colony-Stimulating Factor) RN - EC 2.7.11.1 (Ribosomal Protein S6 Kinases) RN - EC 2.7.11.17 (Calcium-Calmodulin-Dependent Protein Kinases) RN - SJE1IO5E3I (2-(2-amino-3-methoxyphenyl)-4H-1-benzopyran-4-one) RN - YOW8V9698H (Dimethyl Sulfoxide) SB - IM MH - Calcium-Calmodulin-Dependent Protein Kinases/metabolism MH - Cell Differentiation/drug effects MH - Cell Division/drug effects MH - DNA-Binding Proteins/*metabolism MH - Dimethyl Sulfoxide MH - Enzyme Activation/drug effects MH - Flavonoids/pharmacology MH - Fluorescent Antibody Technique MH - Granulocyte Colony-Stimulating Factor/*pharmacology MH - Granulocyte-Macrophage Colony-Stimulating Factor/*pharmacology MH - HL-60 Cells/*drug effects MH - Humans MH - Phosphotyrosine/analysis MH - Ribosomal Protein S6 Kinases/metabolism MH - STAT3 Transcription Factor MH - Signal Transduction/drug effects MH - Trans-Activators/*metabolism EDAT- 1999/05/21 00:00 MHDA- 1999/05/21 00:01 CRDT- 1999/05/21 00:00 PHST- 1999/05/21 00:00 [pubmed] PHST- 1999/05/21 00:01 [medline] PHST- 1999/05/21 00:00 [entrez] AID - 10.1074/jbc.274.22.15575 [doi] AID - S0021-9258(19)73062-2 [pii] PST - ppublish SO - J Biol Chem. 1999 May 28;274(22):15575-81. doi: 10.1074/jbc.274.22.15575.