Enhancement of ovine trophoblast interferon by granulocyte macrophage-colony stimulating factor: possible involvement of protein kinase C

1997 ◽  
Vol 19 (2) ◽  
pp. 121-130 ◽  
Author(s):  
K Imakawa ◽  
KD Carlson ◽  
WJ McGuire ◽  
RK Christenson ◽  
A Taylor
Keyword(s):  
Protein Kinase C ◽  
Protein Kinase ◽  
Colony Stimulating Factor ◽  
Gm Csf ◽  
Calphostin C ◽  
Kinase C ◽  
Messenger System ◽  
Macrophage Colony Stimulating Factor ◽  
Macrophage Colony ◽  
Stimulating Factor

Interferon-tau (oIFNtau), the major secretory product of ovine conceptuses between days 13 and 21 (day 0=day of estrus) of pregnancy, is implicated in the process of maternal recognition of pregnancy. Culturing of day-14 and day-16 conceptus tissues in the presence of human granulocyte macrophage-colony stimulating factor (hGM-CSF) or interleukin-3 (IL-3) produces a marked increase in oIFNtau mRNA and protein expression. Since GM-CSF and IL-3 are localized at the luminal and glandular epithelia of the ovine endometrium, maternally derived GM-CSF and IL-3 may affect conceptus production of oIFNtau in a paracrine manner. However, the molecular mechanisms by which endometrial GM-CSF and IL-3 up-regulate oIFNtau production have not been defined. As an initial investigation of the signaling pathway regulating the GM-CSF induction of the oIFNtau gene, day-16 conceptuses were treated with an inducer, phorbol 12-myristate 13-acetate (PMA) and an inhibitor, calphostin C of the protein kinase C (PKC) pathway. Treatment with either 150 units/ml hGM-CSF (P<0.01) or 10 nM PMA (P<0.05) resulted in a significant increase in oIFNtau mRNA expression. Pretreatment of conceptuses with 1 microM PMA for 12 h to produce PKC-deficient tissues or treatment with 50 mM calphostin C abolished the hGM-CSF-induced increase in oIFNtau mRNA. An in vitro expression system was established for the analysis of oIFNtau gene regulatory sequences. The oIFNtau010 gene has been isolated previously and found to be the principal oIFNtau gene up-regulated during the preimplantation period. 5'-Flanking regions of the oIFNtau010 gene, 2 kb and 0.8 kb, were cloned into a basic chloramphenicol acetyltransferase reporter plasmid. These oIFNtau010 promoter constructs, along with expression controls, were transfected into human choriocarcinoma cells (JAR and JEG3) and their responsiveness to hGM-CSF and second messenger system activators including PMA, calcium ionophore (A23187) and 8-bromo-cAMP were characterized. The oIFNtau010 promoter constructs were up-regulated by hGM-CSF and PMA treatments (P<0.01). Combined treatment with PMA and A23187 prevented the promoter activation seen with PMA alone. The conceptus culture data, along with the results from the transfection experiments, suggest that the stimulatory effect of GM-CSF on oIFNtau is mediated through the PKC second messenger system.

scholarly journals Stimulation of phosphoinositol turnover and protein kinase C activation by granulocyte-macrophage colony-stimulating factor in HL-60 cells

Blood ◽  
1992 ◽  
Vol 80 (4) ◽  
pp. 1045-1051
Author(s):  
M Nishimura ◽  
K Kaku ◽  
Y Azuno ◽  
K Okafuji ◽  
Y Inoue ◽  
...  
Keyword(s):  
Protein Kinase C ◽  
Cell Differentiation ◽  
Protein Kinase ◽  
Cyclic Nucleotides ◽  
Colony Stimulating Factor ◽  
Gm Csf ◽  
Kinase C ◽  
Macrophage Colony Stimulating Factor ◽  
Macrophage Colony ◽  
Stimulating Factor

Phosphoinositol turnover, diacylglycerol generation, protein kinase C (PK-C) activity, and intracellular cyclic nucleotides were studied in an established human leukemia cell line, HL-60, in response to one of the hematopoietic cytokines, granulocyte-macrophage colony-stimulating factor (GM-CSF). Continuous exposure of HL-60 cells to GM-CSF induced the cell differentiation that was evaluated by the nitroblue tetrazolium (NBT) reducing activity. GM-CSF also exhibited a proliferative effect on HL-60 cells. GM-CSF at 1 nmol/L, an optimal concentration for cell growth and cell differentiation, induced significant changes in the intracellular inositoltriphosphate (IP3). Diacylglycerol generation was also stimulated by GM-CSF treatment. GM- CSF increased the membrane PK-C activity by 10-fold of the control, whereas no measurable change in cyclic nucleotides was observed. These data indicated that phosphoinositol turnover and the activation of PK-C were included in the GM-CSF signal transducing pathway in HL-60 cell. Phosphoinositol response leading to PK-C activation may act as a trigger signal of cell differentiation by GM-CSF.

Phorbol ester inhibits granulocyte-macrophage colony-stimulating factor binding and tyrosine phosphorylation

1992 ◽  
Vol 262 (2) ◽  
pp. C276-C281 ◽  
Author(s):  
J. Gomez-Cambronero ◽  
C. K. Huang ◽  
M. Yamazaki ◽  
E. Wang ◽  
T. F. Molski ◽  
...  
Keyword(s):  
Protein Kinase C ◽  
Protein Kinase ◽  
Tyrosine Phosphorylation ◽  
Phorbol Ester ◽  
Colony Stimulating Factor ◽  
Gm Csf ◽  
Kinase C ◽  
Macrophage Colony Stimulating Factor ◽  
Macrophage Colony ◽  
Stimulating Factor

Exposure of human polymorphonuclear neutrophils to phorbol 12-myristate 13-acetate (PMA) results in a 70-75% reduction in the specific binding of 125I-granulocyte-macrophage colony-stimulating factor (GM-CSF) to its receptors. The PMA-induced reduction in 125I-GM-CSF binding is due to a decrease in the number of available GM-CSF receptors, as derived from Scatchard analysis of the binding data. On the other hand, the phorbol ester 4-alpha-phorbol 12,13-didecanoate (4 alpha-PDD) fails to affect 125I-GM-CSF binding. PMA promotes phosphorylation on tyrosine residues of several proteins, as demonstrated by Western blotting analysis using antiphosphotyrosine antibodies. The molecular masses of those proteins are 41, 55, 66, 78, 85, 104, and 115 kDa. GM-CSF increases the levels of the tyrosine phosphorylation of several proteins, the majority of which have similar Mr to those found in PMA-stimulated neutrophils. This increase, on all but the 41-kDa protein, is partially prevented by treatment of the cells with PMA. The inhibition by PMA of GM-CSF binding to its receptors and its phosphorylated effects is partially prevented by the protein kinase C inhibitor 1-(5-isoquinolinylsulfonyl)-2-methylpiperazine and, to a greater extent, by staurosporine. It is suggested that PMA, through the activation of protein kinase C, interrupts the excitation-response sequence initiated by GM-CSF, which includes tyrosine phosphorylation, and that the earliest altered step is the binding of GM-CSF to its receptor.

scholarly journals Stimulation of phosphoinositol turnover and protein kinase C activation by granulocyte-macrophage colony-stimulating factor in HL-60 cells

Blood ◽  
1992 ◽  
Vol 80 (4) ◽  
pp. 1045-1051 ◽  
Author(s):  
M Nishimura ◽  
K Kaku ◽  
Y Azuno ◽  
K Okafuji ◽  
Y Inoue ◽  
...  
Keyword(s):  
Protein Kinase C ◽  
Cell Differentiation ◽  
Protein Kinase ◽  
Cyclic Nucleotides ◽  
Colony Stimulating Factor ◽  
Gm Csf ◽  
Kinase C ◽  
Macrophage Colony Stimulating Factor ◽  
Macrophage Colony ◽  
Stimulating Factor

Abstract Phosphoinositol turnover, diacylglycerol generation, protein kinase C (PK-C) activity, and intracellular cyclic nucleotides were studied in an established human leukemia cell line, HL-60, in response to one of the hematopoietic cytokines, granulocyte-macrophage colony-stimulating factor (GM-CSF). Continuous exposure of HL-60 cells to GM-CSF induced the cell differentiation that was evaluated by the nitroblue tetrazolium (NBT) reducing activity. GM-CSF also exhibited a proliferative effect on HL-60 cells. GM-CSF at 1 nmol/L, an optimal concentration for cell growth and cell differentiation, induced significant changes in the intracellular inositoltriphosphate (IP3). Diacylglycerol generation was also stimulated by GM-CSF treatment. GM- CSF increased the membrane PK-C activity by 10-fold of the control, whereas no measurable change in cyclic nucleotides was observed. These data indicated that phosphoinositol turnover and the activation of PK-C were included in the GM-CSF signal transducing pathway in HL-60 cell. Phosphoinositol response leading to PK-C activation may act as a trigger signal of cell differentiation by GM-CSF.

Role of Protein Kinase C in Expression of Granulocyte Colony Stimulating Factor and Granulocyte-Macrophage Colony Stimulating Factor in Lung Cancer Cells.

Blood ◽  
2004 ◽  
Vol 104 (11) ◽  
pp. 4210-4210
Author(s):  
Yoshiki Uemura ◽  
Makoto Kobayashi ◽  
Hideshi Nakata ◽  
Tetsuya Kubota ◽  
Hirokuni Taguchi
Keyword(s):  
Lung Cancer ◽  
Protein Kinase ◽  
Granulocyte Colony Stimulating Factor ◽  
Colony Stimulating Factor ◽  
Gm Csf ◽  
Kinase C ◽  
Macrophage Colony Stimulating Factor ◽  
Macrophage Colony ◽  
Stimulating Factor

Abstract Many cases of tumors that produce granulocyte-colony stimulating factor (G-CSF) or granulocyte macrophage-colony stimulating factor (GM-CSF) have been reported. However, the biological properties regulatory mechanisms of the overproduction of G-CSFor GM-CSF by tumor cells are not well known. We present the role of protein kinase C (PKC) pathways in the constitutive expression of G-CSF and GM-CSF by lung cancer cells. We previously established two lung cancer cell lines, OKa-C-1 and MI-4, that constitutively produce an abundant dose of G-CSF and GM-CSF. We showed that the PKC activator; phorbol 12-myristate 13-acetate (PMA) stimulated the production of GM-CSF in a dose-dependent manner and inversely reduced G-CSF in the cell lines. These effects of PMA were antagonized by PKC inhibitor; staurosporine. The induction of GM-CSF expression by PMA was mediated through the activations of nuclear factor (NF)-kB activation. The induction of G-CSF expression by staurosporine was mediated through p44/42 mitogen-activated protein kinase (MAPK) pathway signaling. PMA accelerated cell growth and inhibited cell death in the cell line. Whereas staurosporine acted inversely. GM-CSF induced by PMA might stimulate cell growth and suppress cell death. G-CSF expression by staurosporine appears to be related to the activation of p44/42 MAPK, and GM-CSF by PMA to NF-kB in OKa-C-1 and MI-4 cells. Figure Figure

scholarly journals An Activated Protein Kinase C α Gives a Differentiation Signal for Hematopoietic Progenitor Cells and Mimicks Macrophage Colony-stimulating Factor–stimulated Signaling Events

1998 ◽  
Vol 140 (6) ◽  
pp. 1511-1518 ◽  
Author(s):  
Andrew Pierce ◽  
Clare M. Heyworth ◽  
Sian E. Nicholls ◽  
Elaine Spooncer ◽  
T. Michael Dexter ◽  
...  
Keyword(s):  
Protein Kinase C ◽  
Protein Kinase ◽  
Progenitor Cells ◽  
Hematopoietic Progenitor Cells ◽  
Colony Stimulating Factor ◽  
Hematopoietic Progenitor ◽  
Kinase C ◽  
Macrophage Colony Stimulating Factor ◽  
Macrophage Colony ◽  
Stimulating Factor

Highly enriched, bipotent, hematopoietic granulocyte macrophage colony-forming cells (GM-CFC) require cytokines for their survival, proliferation, and development. GM-CFC will form neutrophils in the presence of the cytokines stem cell factor and granulocyte colony-stimulating factor, whereas macrophage colony-stimulating factor leads to macrophage formation. Previously, we have shown that the commitment to the macrophage lineage is associated with lipid hydrolysis and translocation of protein kinase C α (PKCα) to the nucleus. Here we have transfected freshly prepared GM-CFC with a constitutively activated form of PKCα, namely PKAC, in which the regulatory domain has been truncated. Greater than 95% of the transfected cells showed over a twofold increase in PKCα expression with the protein being located primarily within the nucleus. The expression of PKAC caused macrophage development even in the presence of stimuli that normally promote only neutrophilic development. Thus, M-CSF–stimulated translocation of PKCα to the nucleus is a signal associated with macrophage development in primary mammalian hematopoietic progenitor cells, and this signal can be mimicked by ectopic PKAC, which is also expressed in the nucleus.

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