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• W2010080596 abstract "We have shown that leukemia inhibitory factor (LIF) is expressed in corticotroph cells and stimulates POMC gene expression and ACTH secretion in vivo and in vitro. We therefore examined the regulation of in vitro and in vivo pituitary LIF expression by cytokines known to stimulate the hypothalamo-pituitary-adrenal axis. In the corticotroph cell line AtT-20/D16v-F2, recombinant murine interleukin-1beta (IL-1beta; 0.1-10.0 ng/ml) caused a 5- to 10-fold increase in LIF messenger RNA (mRNA) levels. LIF mRNA expression was induced as early as 1 h, peaked at 2 h, and still persistently elevated above the baseline after 8 h. This effect of IL-1beta on LIF mRNA expression was abolished by preincubation with human IL-1 receptor antagonist (100 ng/ml) or antimurine IL-1beta antibody (10 microg/ml). Tumor necrosis factor-alpha (20 ng/ml) only modestly increased LIF mRNA, but was synergistic with IL-1beta (up to 2.5-fold). In contrast, IL-2 and IL-6 did not alter LIF mRNA. In C57BL/6 mice, i.p. injection of 100 ng IL-1beta increased plasma ACTH and corticosterone levels after 1 h (P < 0.02). In addition, pituitary LIF mRNA content was increased for up to 2 h in response to IL-1beta. In comparison to wild-type (+/+) B6D2F1 mice, LIF knockout mice with a deleted LIF gene (-/-) exhibited decreased plasma ACTH (631 +/- 61 vs. 376 +/- 50 pg/ml; P < 0.01) and corticosterone (783 +/- 85 vs. 433 +/- 51 ng/ml; P < 0.01) levels 1 h after i.p. IL-1beta administration. In conclusion, corticotroph LIF mRNA expression is specifically stimulated by IL-1beta and tumor necrosis factor-alpha. The attenuated hypothalamo-pituitary-adrenal response to IL-1beta in LIF knockout mice indicates that the effect of IL-1beta on ACTH secretion is modulated by LIF. Thus, LIF appears to function as an immune-neuroendocrine modulator signaling the hypothalamo-pituitary-adrenal axis." @default.
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• W2010080596 date "1998-05-01" @default.
• W2010080596 modified "2023-09-25" @default.
• W2010080596 title "Leukemia Inhibitory Factor Modulates Interleukin-1β-Induced Activation of the Hypothalamo-Pituitary-Adrenal Axis¹" @default.
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• W2010080596 doi "https://doi.org/10.1210/endo.139.5.6017" @default.
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