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      봉출 추출물의 nitric oxide synthase 저해활성 = Inhibition of Nitric Oxide Synthase by Curcuma zedoaria

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      https://www.riss.kr/link?id=A82363583

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      다국어 초록 (Multilingual Abstract)

      Nicotinamide Adenine Dinucleotide Phosphate (NADPH) has antioxidant effect in the body and thus decreases the symptoms of senility. The development of a transdermal delivery formulation for NADPH is a very difficult task, due to its rapid decomposition by oxidation, low partition coefficient into stratum corneum, high molecular weight and electrical charge at neutral pH in aqueous solution. The purpose of this work is to test several anti-oxidants as the stabilizing agent for NADPH in the aqueous formulation, and to study the effect of these agents on the in-vitro iontophoretic transport through hairless mouse skin. The stability of NADPH in aqueous solution with/without various antioxidants such as butylated hydroxy toluene (BHT), resveratrol, a-tocopherol and Vitamine C was studied. BHT an a-tocopherol (0.01 % w/w) exhibited minimal stabilizing effect, however resveratrol and vitamine C showed significant stabilizing effect. Stabilizing effect of vitamine C was proportional to the concentration in aqueous solution. Although vitamine C increased the stability ofNADPH significantly, it decreased flux of NADPH in a concentration dependent fashion, therapeutic amount ofNADPH can be delivered through skin using iontophoresis and These results suggest that, in order to develope a efficient iontophoresis formulation, it is important to choose a stabilizing agents which are not only potent in stabilizing effect but also not competitive for the delivery of NADPH.
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      Nicotinamide Adenine Dinucleotide Phosphate (NADPH) has antioxidant effect in the body and thus decreases the symptoms of senility. The development of a transdermal delivery formulation for NADPH is a very difficult task, due to its rapid decompositio...

      Nicotinamide Adenine Dinucleotide Phosphate (NADPH) has antioxidant effect in the body and thus decreases the symptoms of senility. The development of a transdermal delivery formulation for NADPH is a very difficult task, due to its rapid decomposition by oxidation, low partition coefficient into stratum corneum, high molecular weight and electrical charge at neutral pH in aqueous solution. The purpose of this work is to test several anti-oxidants as the stabilizing agent for NADPH in the aqueous formulation, and to study the effect of these agents on the in-vitro iontophoretic transport through hairless mouse skin. The stability of NADPH in aqueous solution with/without various antioxidants such as butylated hydroxy toluene (BHT), resveratrol, a-tocopherol and Vitamine C was studied. BHT an a-tocopherol (0.01 % w/w) exhibited minimal stabilizing effect, however resveratrol and vitamine C showed significant stabilizing effect. Stabilizing effect of vitamine C was proportional to the concentration in aqueous solution. Although vitamine C increased the stability ofNADPH significantly, it decreased flux of NADPH in a concentration dependent fashion, therapeutic amount ofNADPH can be delivered through skin using iontophoresis and These results suggest that, in order to develope a efficient iontophoresis formulation, it is important to choose a stabilizing agents which are not only potent in stabilizing effect but also not competitive for the delivery of NADPH.

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