Induction of Pituitary Cytokine Transcripts by Peripheral Lipopolysaccharide
Induction of Pituitary Cytokine Transcripts by Peripheral Lipopolysaccharide
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外周脂多糖诱导垂体细胞因子转录
DOI:
--
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发表时间:
1999
影响因子:
3.2
通讯作者:
Herkenharn
中科院分区:
文献类型:
--
作者:
Whiteside;Quan;Herkenharn
Systemically administered lipopolysaccharide (LPS) elicits profound changes in pituitary hormone secretion. Pro‐inflammatory cytokines have been proposed as mediators of these responses. In this study, we used in‐situ hybridization histochemistry to investigate LPS‐induced cytokine gene expression in the rat pituitary. After i.p. or i.v. injection of various doses of LPS, mRNA for the immediate‐early gene IκBu (an inhibitor of NF‐κB, a transcription factor that regulates the expression of many pro‐inflammatory cytokines) was induced in the anterior lobe as early as 0.5 h. The induced IκBα mRNA expression peaked at 1 h. In the posterior lobe, IκBα mRNA was first induced at 0.5 h and peaked at 2 h. A similar spatiotemporal pattern of interleukin‐1b (IL‐1) mRNA induction was observed. In addition, at 2 h after injection, TNFα, IL‐1β converting enzyme (ICE), and IL‐1 receptor antagonist (IL‐1RA) mRNAs were induced in both anterior and posterior lobes. Type 1 IL‐1 receptor (IL‐1R1) mRNA was constitutively expressed in the pituitary, and its expression level did not change after the LPS injection. Interestingly, the mRNA coding for glial fibrillary acidic protein (GFAP), an astrocyte marker, was selectively induced in the posterior lobe at 2 h after LPS injection, suggesting that LPS affects pituicyte function. Together, these results suggest that LPS acts directly on the pituitary to rapidly induce cytokine expression. Locally synthesized cytokines may activate cytokine receptor bearing cells to modulate the endocrine activities of the pituitary.
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DOI:
10.1210/jcem.80.4.7714108
发表时间:
1995
期刊:
The Journal of clinical endocrinology and metabolism.
影响因子:
--
作者:
vanderPoll,T;VanZee,KJ;Endert,E;Coyle,SM;Stiles,DM;Pribble,JP;Catalano,MA;Moldawer,LL;Lowry,SF
通讯作者:
Lowry,SF
DOI:
--
发表时间:
1988
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Jobling,SA;Auron,PE;Gurka,G;Webb,AC;McDonald,B;Rosenwasser,LJ;Gehrke,L
通讯作者:
Gehrke,L
影响因子:
56.9
作者:
SAPOLSKY, R;RIVIER, C;VALE, W
通讯作者:
VALE, W
DOI:
10.1016/0169-328x(91)90111-a
发表时间:
1991-09
期刊:
Brain research. Molecular brain research
影响因子:
--
作者:
J. Poirier;M. Hess;P. May;C. Finch
通讯作者:
J. Poirier;M. Hess;P. May;C. Finch
DOI:
10.1242/jeb.139.1.67
发表时间:
1988
期刊:
The Journal of experimental biology
影响因子:
--
作者:
Hatton,GI
通讯作者:
Hatton,GI