• Journal of Photoscience
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• 제9권3호
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• pp.49-50
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• 2002

N-Nitrosoproline(NPRO) is endogenously formed from proline and nitrite. NPRO has been reported to be nonmutagenic and noncarcinogenic. In this study, we have detected the direct mutagenicity of NPRO with UVA and UVB towards S. typhimurium. Formation of 8-oxo-7,8-dihydro-2'-deoxyguanosine (8-oxodG), a mutagenic lesion, was observed in calf thymus DNA treated with NPRO plus simulated sunlight. Furthermore, the treatment with NPRO and sunlight induced single strand breaks in the superhelical replicative form of phage M13mp2 DNA. An analysis using scavengers suggested that both reactive oxygen species and NO radical mediate the strand breaks. The formation of nitric oxide was observed in NPRO solution irradiated with UVA. The co-mutagenic and co-toxic actions of NPRO and sunlight merit attention as possible mechanisms increasing the carcinogenic risk from UVA irradiation.

• 한국식품영양과학회지
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• 제22권3호
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• pp.266-272
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• 1993

우리들의 식이중에 함유되어 있는 플라보노이드 화합물들이 니트로소화합물의 생성에 미치는 영향을 알아보기 위하여 생체내에서 일어나는 니트로소화 과정을 아질산염, 프로린과 시료를 동시에 투여하여 생성된 니트로소프로린 함량을 시험관 및 생체조건하에서 HPLC로서 측정하였다. 그 결과, 잘 알려진 ascorbic acid, KSCN과 더불어 catechin, chlorogenic acid, morin, luteolin, luteolin-7-O-glucoside, naringenin 등은 아질산염 소거에는 상당한 효과가 있는 것으로 나타났으나, 니트로소프로린 생성에 대해서는 ascorbic acid와 chlorogenic acid를 제외한 나머지 화합물들은 거의 영향을 미치지 않거나 오히려 그 생성을 촉진시키는 것으로 나타났다.

• 한국식품영양과학회지
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• 제27권5호
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• pp.1015-1018
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• 1998

Capsaicin(8-methyl-N-vanillyl-6-nonenamide: CAP) known well as a major compound of not taste in hot pepper, was investigated for the inhibition effect on in vitro nitrosation. CAP(100$\mu$mol) inhibited the formation of N-nitrosoproline(NPRO) and N-nitrosothioproline(NTPRO) by 56% and 26%, respectively. Vanillyl alcohol inhibited the nitrosation of proline by a concentration-dependent manner, and vanillic acid and vanillin were less effective in blocking the nitrosation of proline compared to CAP and anillyl alcohol. The inhibitory effect of NPRO formation by CAP was evaluated to similar with alpha-tocopherol, and vanillyl alcohol was more effective than alpha-tocopherol in blocking the nitrosation of proline. Our results suggested that CAP and its metabolites such as vanillyl alcohol could inhibit endogenous nitrosation in hydrophobic biological environment.

• 대한가정학회:학술대회논문집
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• 대한가정학회 1997년도 Program & Abstracts * The 7th Korea-Japan Home Economics Joint Syposium
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• pp.253-253
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• 1997