One-step preparation of S-nitrosated human serum albumin with high biological activities

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Abstract

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論文(Article)

S-Nitrosated human serum albumin (SNO-HSA) is a large molecular weight nitric oxide carrier in human plasma, and because of its many beneficial effects in different tests, it is currently under investigation as a cytoprotective agent. However, making SNO-HSA preparations is a complicated and time-consuming process. We found that binding of caprylic acid (CA) and N-acetyl-L-tryptophan (N-AcTrp) to defatted mercaptalbumin increased S-nitrosation by S-nitrosoglutathione (GS-NO) by making Cys-34 of HSA more accessible and by protecting it against oxidation, respectively. Fortunately, HSA solutions for clinical use contain high concentrations of CA and N-AcTrp as stabilizers. By making use of that fact it was possible to work-out a fast and simple procedure for producing SNO-HSA: Incubation of a commercial HSA formulation with GS-NO for only one minute results in S-nitrosation of HSA. The biological usefulness of such a preparation was tested in a rat ischemia-reperfusion liver injury model. Although our procedure for making SNO-HSA is fast and straightforward, the cytoprotective effect of the preparation was similar to, or better than, that of a preparation made in a more traditional way. The clinical development of SNO-HSA as a strong cytoprotective agent is under way using this method in collaboration with clinicians and industrial developers.

http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6WNT-5017HTP-1&_user=4545557&_coverDate=09%2F15%2F2010&_rdoc=1&_fmt=high&_orig=gateway&_origin=gateway&_sort=d&_docanchor=&view=c&_acct=C000008298&_version=1&_urlVersion=0&_userid=4545557&md5=50f652d134dd09a6f72481d07de2387d&searchtype=a

Journal

  • Nitric Oxide

    Nitric Oxide 23 (2), 121-127, 2010-09-15

    Elsevier

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