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Coinduction of inducible nitric oxide synthase and arginine recycling enzymes in cytokine-stimulated PC12 cells and high output production of nitric oxide.

Authors: Zhang, WY  Gotoh, T  Oyadomari, S  Mori, M 
Citation: Zhang WY, etal., Brain Res Mol Brain Res. 2000 Nov 10;83(1-2):1-8.
Pubmed: (View Article at PubMed) PMID:11072090

Nitric oxide (NO) is involved in many physiological and pathological processes in the brain. NO is synthesized from arginine by nitric oxide synthase (NOS), and the citrulline generated as a by-product can be recycled to arginine by argininosuccinate synthetase (AS) and argininosuccinate lyase (AL) via the citrulline-NO cycle. When neuronal PC12 cells differentiated with nerve growth factor were treated with interferon-gamma (IFNgamma) and tumor necrosis factor-alpha (TNFalpha), iNOS and AS mRNAs and proteins were markedly induced, with AL mRNA and protein being weakly induced. Cationic amino acid transporter-1 and -2 were not induced. IFNgamma or TNFalpha alone was ineffective. A large amount of NO (190 microM NO(2)(-) plus NO(3)(-) in culture medium in 24 h) was produced from arginine by cytokine-stimulated cells, and arginine could be replaced by citrulline. iNOS induction and NO production were attenuated by dexamethasone and dibutyryl cAMP and even more strongly so when combined. Therefore, a large amount of NO is produced in cytokine-stimulated PC12 cells following to induction of iNOS and citrulline-arginine recycling is important for NO production.

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RGD Object Information
RGD ID: 4139899
Created: 2010-08-23
Species: All species
Last Modified: 2010-08-23
Status: ACTIVE



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RGD is funded by grant HL64541 from the National Heart, Lung, and Blood Institute on behalf of the NIH.