Redox properties and human serum albumin binding of nitro-oleic acid
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081707%3A_____%2F19%3A00509880" target="_blank" >RIV/68081707:_____/19:00509880 - isvavai.cz</a>
Alternative codes found
RIV/61989592:15110/19:73595256 RIV/60076658:12310/19:43899433
Result on the web
<a href="https://doi.org/10.1016/j.redox.2019.101213" target="_blank" >https://doi.org/10.1016/j.redox.2019.101213</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.redox.2019.101213" target="_blank" >10.1016/j.redox.2019.101213</a>
Alternative languages
Result language
angličtina
Original language name
Redox properties and human serum albumin binding of nitro-oleic acid
Original language description
Nitro-fatty acids modulate inflammatory and metabolic stress responses, thus displaying potential as new drug candidates. Herein, we evaluate the redox behavior of nitro-oleic acid (NO2-OA) and its ability to bind to the fatty acid transporter human serum albumin (HSA). The nitro group of NO2-OA underwent electrochemical reduction at 0.75 V at pH 7.4 in an aqueous milieu. Based on observations of the R-NO2 reduction process, the stability and reactivity of NO2-OA was measured in comparison to oleic acid (OA) as the negative control. These electrochemically-based results were reinforced by computational quantum mechanical modeling. DFT calculations indicated that both the C9-NO2 and C10-NO2 positional isomers of NO2-OA occurred in two conformers with different internal angles (69 degrees and 110 degrees) between the methyl- and carboxylate termini. Both NO2-OA positional isomers have LUMO energies of around 0.7 eV, affirming the electrophilic properties of fatty acid nitroalkenes. In addition, the binding of NO2-OA and OA with HSA revealed a molar ratio of similar to 7:1 [NO2-OA]: [HSA]. These binding experiments were performed using both an electrocatalytic approach and electron paramagnetic resonance (EPR) spectroscopy using 16-doxyl stearic acid. Using a Fe(DTCS)(2) spin-trap, EPR studies also showed that the release of the nitro moiety of NO2OA resulted in the formation of nitric oxide radical. Finally, the interaction of NO2-OA with HSA was monitored via Tyr and Trp residue electro-oxidation. The results indicate that not only non-covalent binding but also NO2-OA-HSA adduction mechanisms should be taken into consideration. This study of the redox properties of NO2-OA is applicable to the characterization of other electrophilic mediators of biological and pharmacological relevance.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10608 - Biochemistry and molecular biology
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Redox Biology
ISSN
2213-2317
e-ISSN
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Volume of the periodical
24
Issue of the periodical within the volume
JUN 2019
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
12
Pages from-to
101213
UT code for WoS article
000471255400042
EID of the result in the Scopus database
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