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- W2032091078 abstract "Bacterial lipopolysaccharide (LPS) or endotoxin induces neurological manifestations including anorexia. It is proposed that LPS-induced cytokine production is involved in the generation of neurological manifestations and in neuroinflammatory/immunological responses during Gram-negative infections. For example, LPS-induced effects can be blocked or ameliorated by the interleukin-1 receptor antagonist (IL-1Ra). Here, sensitive and specific RNase protection assays were used to investigate the effects of the intracerebroventricular (i.c.v.) administration of LPS on mRNA levels of interleukin-1β (IL-1β) system components, tumor necrosis factor (TNF)-α, transforming growth factor (TGF)-β1, and neuropeptide Y (NPY) in the cerebellum, hippocampus, and hypothalamus. The same brain region sample was analyzed with all of the antisense probes. The data show simultaneous local induction of multiple cytokine components messenger ribonucleic acids (mRNAs) within specific brain regions in anorectic rats responding to i.c.v. administered LPS (500 ng/rat). Interleukin-1β and IL-1Ra had a similar mRNA induction profile (hypothalamus > cerebellum > hippocampus). Interleukin-1 receptor type I (IL-1RI) mRNA also increased in all three brain regions examined, and the soluble form of IL-1 receptor accessory protein (IL-1R AcP II) mRNA was induced in the hypothalamus. Tumor necrosis factor-α mRNA levels increased in the hypothalamus > hippocampus > cerebellum. Levels of membrane bound IL-1R AcP, TGF-β1, and NPY mRNAs did not change significantly in any brain region. The results suggest that: (1) endogenous up-regulation of IL-1β and TNF-α in the hypothalamus contribute to LPS-induced anorexia; and (2) the ratio IL-1Ra/IL-1β, and IL-1β ↔ TNF-α interactions may have implications for Gram-negative infections associated with high levels of LPS in the brain-cerebrospinal fluid." @default.
- W2032091078 created "2016-06-24" @default.
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- W2032091078 date "1998-03-01" @default.
- W2032091078 modified "2023-09-26" @default.
- W2032091078 title "Interleukin-1β System (Ligand, Receptor Type I, Receptor Accessory Protein and Receptor Antagonist), TNF-α, TGF-β1 and Neuropeptide Y mRNAs in Specific Brain Regions During Bacterial LPS-Induced Anorexia" @default.
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- W2032091078 doi "https://doi.org/10.1016/s0361-9230(97)00437-1" @default.
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