期刊
ORGANIC & BIOMOLECULAR CHEMISTRY
卷 5, 期 2, 页码 307-309出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/b613334g
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资金
- NATIONAL INSTITUTE OF DIABETES AND DIGESTIVE AND KIDNEY DISEASES [R01DK071085] Funding Source: NIH RePORTER
- NIDDK NIH HHS [R01 DK071085, DK071085, R01 DK071085-05] Funding Source: Medline
Ionizing radiation activates a mitochondrial nitric oxide synthase, leading to inhibition of the respiratory chain, generation of excess superoxide, peroxynitrite production and nitrosative damage. We have measured the radioprotective effects of a nitric oxide synthase antagonist (AMT) versus a free radical scavenger (4-amino-TEMPO) using electrochemical detection of nitric oxide and peroxynitrite. To enhance their efficacy, we have conjugated these compounds to peptides and peptide isosteres derived from the antibiotic gramicidin S - that target the mitochondria. The targeting ability of these peptidyl conjugates was measured using quantitative mass spectrometry.
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