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PMID |
Sentence |
| 1 |
18653623
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Insulin-like growth factor-1 delays Fas-mediated apoptosis in human neutrophils through the phosphatidylinositol-3 kinase pathway.
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| 2 |
18653623
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We previously showed that insulin-like growth factor-1 (IGF1) delays spontaneous neutrophil apoptosis without influencing the secretion of cytokines by these cells.
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| 3 |
18653623
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We show that IGF1 delays neutrophil apoptosis triggered by the agonistic anti-Fas antibody CH11 and that the effect of IGF1 is comparable in magnitude to that of the acknowledged anti-apoptotic cytokines interferon-gamma (IFNG) and granulocyte-macrophage colony-stimulating factor (GM-CSF; now known as CSF2).
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| 4 |
18653623
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IGF1 did not affect Fas expression or activation by anti-Fas of caspase-8, but inhibited the depolarization of the mitochondrial membrane.
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| 5 |
18653623
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Inhibitor studies indicate that the phosphatidylinositol-3 kinase (PI3K) pathway, but not the MEK-ERK pathway, mediates the effects of IGF1.
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| 6 |
18653623
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However, in contrast to CSF2, IGF1 did not induce phosphorylation and translocation to the membrane of AKT, the canonical downstream target of PI3K.
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| 7 |
18653623
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We therefore speculate that other downstream targets of PI3K are involved in the delay of neutrophil apoptosis by IGF1, possibly through stabilization of the mitochondrial membrane.
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| 8 |
19129516
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The present study was conducted to explore the source of acetylcholine (ACH) in the corpus luteum (CL) and to test our hypothesis of an antiapoptotic role of ACH in the bovine CL and, further, to investigate whether nerve growth factor (NGF), insulin-like growth factor 1 (IGF1), and transforming growth factor beta1 (TGFB1) influence the expression of choline acetyltransferase (CHAT), the biosynthetic enzyme of ACH, in cultured bovine luteal cells.
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| 9 |
19129516
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Cell viability and TUNEL assays were performed on cultured midluteal cells treated with or without tumor necrosis factor alpha (TNF)/interferon gamma (IFNG) in the presence of ACH and its muscarinic (atropine) and nicotinic (mecamylamine) receptor antagonists.
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| 10 |
19129516
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ACH increased cell viability and prevented cell death induced by TNF/IFNG.
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| 11 |
19129516
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TNF/IFNG treatment downregulated CHAT expression, whereas NGF, IGF1, and TGFB1 upregulated CHAT expression, in cultured luteal cells.
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| 12 |
19129516
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Locally produced ACH appears to be regulated by NGF, IGF1, and TGFB1.
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