Abstract
Much of the excitement over nitric oxide (NO) is owing to its diverse physiologic and pathophysiologic functions. Induced NO production has been shown to have both beneficial and detrimental consequences. The inducible or high-output NO synthase (NOS) pathway was first characterized and cloned in murine macrophages (1–3). Activation with lipopolysaccharide (LPS) and interferon-γ (IFN-γ) was uniformly used in these studies to increase inducible (i) NOS expression and improve cloning efficiency. Lyons et al. (1) injected mRNA from stimulated RAW 264.7 cells into Xenopus oocytes. RNA fractions from oocytes that expressed measurable nitrite by the Griess reaction were extracted and used to create a cDNA library that was ligated into a phage vector, lambda ZAP II. DNA from phage pools was used as a template in a polymerase chain reaction (PCR) using primers from suspected cofactor-binding sites. The radiolabeled PCR product was then used to screen the cDNA library by plaque hybridization. Recognized phages were isolated and plasmids containing the inserts were rescued by helper-phage superinfection. Two overlapping clones were combined into the expression vector pGEM. In vitro transcribed cRNA from the expression vector was then inserted back into oocytes to confirm functional expression. Nitrite production did not require the presence of Ca2+ and was not inhibited by trifluoperazine, a calmodulin (CaM), and brain-NOS inhibitor.
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References
Lyons, C. R., Orloff, G. J., and Cunningham, J. M. (1992) Molecular cloning and functional expression of an inducible nitric oxide synthase from a murine macrophage cell line. J. Biol. Chemistry 267, 6370–6374.
Xie, Q., Cho H. J., Calaycay, J., and Mumford, R. A., et al. (1992) Cloning and characterization of inducible nitric oxide synthase from mouse macrophages. Science 256, 225–228.
Lowenstein, C. J., Glatt, C. S., Bredt, D. S., and Snyder, S.H. (1992) Cloned and expressed nitric oxide synthase contrasts with the brain enzyme. Proc. Natl. Acad. Sci. USA 89, 6711–6715.
Geller, D. A., deVera, M. E., and Russell, D. A., et al. (1995) A central role for IL-1 beta in the in vitro and in vivo regulation of hepatic inducible nitric oxide synthase. IL-1 beta induces hepatic nitric oxide synthesis. J. Immunol. 155, 4890–4898.
Geller, D. A., Nussler, A. K., Di Silvio, M., et al. (1993) Cytokines, endotoxin, and glucocorticoids regulate the expression of inducible nitric oxide synthase in hepatocytes. Proc. Natl. Acad. Sci. USA 90, 522–526.
Nussler, A. K., Di Silvio, M., and Billiar, T. R., et al. (1992) Stimulation of the nitric oxide synthase pathway in human hepatocytes by cytokines and endotoxin. J. Exp. Med. 176, 261–264.
Geller, D. A., Lowenstein, C. J., Shapiro, R. A., et al. (1993) Molecular cloning and expression of inducible nitric oxide synthase from human hepatocytes. Proc. Natl. Acad. Sci. USA 90, 3491–3495.
Tzeng, E., Billiar, T. R., Robbins, P. D., Loftus, M., and Stuehr, D. J. (1995). Expression of human inducible nitric oxide synthase in a tetrahydrobiopterin (H4B)-deficient cell line: H4B promotes assembly of enzyme subunits into an active dimer. Proc. Natl. Acad. Sci. USA 93, 11,771–11,775.
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© 1998 Humana Press Inc.
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Johnson, M.L., Shapiro, R.A., Billiar, T.R. (1998). Cloning and Expression of Human Inducible Nitric Oxide Synthase. In: Titheradge, M.A. (eds) Nitric Oxide Protocols. Methods in Molecular Biology™, vol 100. Humana Press. https://doi.org/10.1385/1-59259-749-1:43
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DOI: https://doi.org/10.1385/1-59259-749-1:43
Publisher Name: Humana Press
Print ISBN: 978-0-89603-470-9
Online ISBN: 978-1-59259-749-9
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