Evaluation of the in vivo antioxidative activity of redox nanoparticles by using a developing chicken egg as an alternative animal model
| Autor: | Chiaki Abe, Hitoshi Hori, Yukio Nagasaki, Ayaka Kawasaki, Yoshihiro Uto, Chiho Noguchi, Yoshio Endo, Ryo Tanaka, Toru Yoshitomi |
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| Rok vydání: | 2014 |
| Předmět: |
Antioxidant
Hydrocortisone medicine.medical_treatment Amidines Pharmaceutical Science Chick Embryo Biology medicine.disease_cause Thiobarbituric Acid Reactive Substances Redox Antioxidants Cyclic N-Oxides Lipid peroxidation chemistry.chemical_compound Animal model In vivo medicine Animals Brain Embryo Oxidants In vitro Liver Biochemistry chemistry Models Animal embryonic structures Nanoparticles Lipid Peroxidation Oxidation-Reduction Oxidative stress |
| Zdroj: | Journal of Controlled Release. 182:67-72 |
| ISSN: | 0168-3659 |
| Popis: | Antioxidants have been demonstrated to exert beneficial effects as pharmacotherapies for cardiovascular diseases. The in vitro systems generally employed to evaluate antioxidants, however, are limited by having no appreciable in vivo redox status of the antioxidants. Therefore, we used our developing chicken egg model to evaluate the in vivo antioxidative activity of a redox nanoparticle possessing 2,2,6,6-tetramethylpiperidine-1-oxyl (RNP(O)). The 2,2'-azobis(2-methylpropionamidine) dihydrochloride (AAPH) elicited strong oxidative stress and its LD50 value for chick embryos was 3.5±0.9mg/egg. The low molecular weight nitroxide compound, 4-hydroxy-2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPOL), which is known to have the highest level of antioxidant activity, showed no significant protective effect against AAPH-induced embryo lethality. On the contrary, RNP(O) had potent protective effects against AAPH-induced embryo lethality. Moreover, RNP(O) could significantly suppress the production of lipid peroxides in chick serum induced by hydrocortisone. Since RNP(O) has a longer retention time in blood than TEMPOL, RNP(O) may protect the embryo against lethal oxidative stress by suppressing lipid peroxidation. The validity of in vivo experiments using developing chicken eggs was supported by our data, where RNP(O) was determined to elicit strong antioxidative activity in vivo, irrespective of the lack of a significant difference in the in vitro activity between low-molecular weight TEMPOL and RNP(O). Our results support the use of the developing chicken egg model to evaluate the potential in vivo antioxidative activity of RNP(O). |
| Databáze: | OpenAIRE |
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