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- W2030714822 abstract "This study provides the first evidence for catecholamine synthesis and release in the RAW264.7 cell line, an important macrophage model. Although catecholamines were low in unstimulated cells, activation with lipopolysaccharide (LPS) induced tyrosine hydroxylase (TH) mRNA and increased extracellular norepinephrine and intracellular dopamine within 48 h. The catecholamine synthesis inhibitor alpha-methyl-para-tyrosine (alpha-mpt) decreased extracellular norepinephrine levels, suggesting release and rapid turnover of newly synthesized norepinephrine. High concentrations of dopamine or norepinephrine (>/=100 microM) decreased proliferation and increased apoptosis of macrophages. These anti-proliferative effects were prevented by simultaneous treatment with the anti-oxidant ascorbic acid. Pre-incubation with a glutathione synthesis inhibitor (L-buthionine-[S,R]-sulfoximine [L-BSO]) increased sensitivity to catecholamine-stimulated apoptosis, suggesting that glutathione protects macrophages from both endogenous and exogenous catecholamines." @default.
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- W2030714822 date "2003-02-01" @default.
- W2030714822 modified "2023-09-30" @default.
- W2030714822 title "Catecholamines in a macrophage cell line" @default.
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- W2030714822 doi "https://doi.org/10.1016/s0165-5728(02)00435-6" @default.
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