Mechanistic studies on the reaction between R2N-NONOates and aquacobalamin: evidence for direct transfer of a nitroxyl group from R2N-NONOates to cobalt(III) centers.

Mechanistic studies on the reaction between R2N-NONOates and aquacobalamin: evidence for direct transfer of a nitroxyl group from R2N-NONOates to cobalt(III) centers.
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DOI:
10.1002/anie.200904360
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发表时间:
2009
影响因子:
16.6
通讯作者:
Brasch, Nicola E.
Brasch, Nicola E.
中科院分区:
化学1区
文献类型:
--
作者:
Hassanin, Hanaa A.;Hannibal, Luciana;Jacobsen, Donald W.;El-Shahat, Mohamed F.;Hamza, Mohamed S. A.;Brasch, Nicola E.

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The gaseous radical nitric oxide (• NO, NO) is a signaling molecule that plays a vital role in biology. It facilitates vasodilation and inhibits platelet aggregation in the cardio-vascular system, initiates the pro-inflammatory immune response, and regulates neurotransmission.[1, 2] Impaired NO bioavailability is associated with a wide variety of vascular pathologies, including endothelial cell dysfunction.[3] Conse-quently, there is considerable interest in NO donor molecules, such as 1-(N, N-dialkylamino) diazen-1-ium-1, 2-diolates (R2N-NONOates; Figure 1), which spontaneously decompose by first-order acid-catalyzed processes to release up to two NO molecules and the corresponding amine.[4–6] R2N-NONOates are widely used as NO precursors in studies of NO-dependent biological processes [5, 7] and as NO prodrugs with applications in NO-releasing biomaterials, wound healing, organ protection, and
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