• Title/Summary/Keyword: Ames test

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발암물질의 조기검색법 개발에 관한 연구

  • 이병무;윤여표
    • Proceedings of the Korean Society of Applied Pharmacology
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    • pp.171-171
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    • 1993
  • 발암물질의 조기검색법을 개발하고자 변이원성 물질의 스크리닝법으로 널리 사용되고 있는 Ames test 및 chromosomal aberration test를 본 연구에서 개발하고자 하는 DNA 및 Protein-adduct 형성시험법과 비교 연구하였다. 벤조피렌과 아플라톡신 B$_1$을 모델 발암물질로 하여 실시한 Ames test에서는 두 화합물 모두 양성을 나타냈으나 용량-반응 관계가 뚜렷하지 않았다. 또한 고농도에서는 시험물질의 독성체 의해 정상적인 Ames test의 수행이 어려됐다. Chromosomal aberration test에서도 Ames test와 비슷한 결과를 나타냈으며 특히 고농도에서 시험을 실시했을 경우 Ames test에서와 마찬가지로 세포독성의 현상이 관찰되었다. 그러나 본 연구에서 새로이 개발한 DNA 및 Protein-adduct형성 시험법은 저농도에서 고농도에 이르기까지 뚜렷한 용량-반응 관계를 나타냈으며 Ames test 및 chromosomal test에서 일어날 수 있는 false positive나 false negative의 결과를 가져다 줄 우려가 없다. 또한 시험시간이 1-2시간 정도 소요되므로 기존의 방법보다 시험시간을 약 40배 가량 단축시킬 수 있었다.

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Antimutagenic Effects of Sweet Potato Enzymatic Browning Reaction Products (고구마효소 갈변반응생성물의 항돌연변이효과)

  • 박귀근;함승시
    • Microbiology and Biotechnology Letters
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    • v.20 no.5
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    • pp.498-504
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    • 1992
  • In order to investigate the antimutagenicity of the sweet potato enzymatic browning reaction products (SPEBRP) were studied the DNA breaking action, spore rec assay and Ames test. In the DNA breaking action of reaction mixture of SPEBRP and polyphenol compounds with an agarose horizonal electrophoresis, catechol (CAT)-SPEBRP and hydroxyhydroquinone (HHQ)SPEBRP inhibited DNA breaking effect in the presence of $Fe^{2+}$. In the spore ree assay using Bacillus subtilis H17(rec+) and M45(rec-), 3,4-dihydroxytoluene (DHT)-SPEBRP showed strong antimutagenic effects on MNNG. In the Ames test using Salmonella tYPhimurium TA 98 and TA 100, pyrogallol(PYR)-, 3,4-dihydroxytoluene (DHT)- and hydroxyhydroquinone (HHQ)-SPEBRPs suppressed about 67%, 71% and 63% in the mutagenesis induced by Benzo($\alpha$)Pyrene(B($\alpha$)p).

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Genotoxicity Study of Combinations of P-Oxy Benzoic Acids (파라옥시안식향산류 보존료 병용시의 유전적 안전성 평가)

  • 허문영;윤여표;임일호;이정석;김대병
    • Journal of Food Hygiene and Safety
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    • v.11 no.1
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    • pp.17-24
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    • 1996
  • The genotoxicity of combinations of four p-oxybenzoic acids (methyl paraben, ethyl paraben, isopropyl paraben, butyl paraben) and benzoic acid had been evaluated. The in vitro Ames test using Salmonella typhimurium (TA 98, TA 100, 1535, TA 1537) and the invivo micronucleus assay using mouse peripheral blood were performed. Methyl paraben plus benzoic acid, ethyl paraben plus benzoic acid, and ethl paraben plus butyl paraben slightly increased the frequency of microuncleated reticulocytes in the high doses, but were negative in Ames test with Salmonella typhimurium with and without rat liver microsomal activation. The other combinations tested were negative in Ames test and did not show any clastogenic effect in micronucleus test. These results suggest that genotoxicity can produced by th combination of p-oxybenzoic acid.

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Antimutagenicity of Soybean Sprouts Cultured with Germanium (게르마늄 수용액으로 재배한 콩나물의 항돌연변이 효과)

  • 김은정;이경임;박건영
    • Journal of the Korean Society of Food Science and Nutrition
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    • v.33 no.6
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    • pp.930-935
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    • 2004
  • This study was carried out to determine the antimutagenic effect of soybean sprouts cultured in water containing germanium by Ames test and SOS chromotest. Germanium significantly inhibited the mutagenicity induced by aflatoxin B$_1$ (AFB$_1$) in Salmonella typhimurium TA100 by Ames test, and 4-nitroquinoline-N-oxide (4-NQO) in SOS chromotest. Juice from germanium treated soybean sprouts (GTS) inhibited 57∼75% mutagenicity induced by AFB$_1$, N-methyl-N'-nitro-N-nitrosoguanidine (MNNG) and 4-NQO compared with 20∼48% inhibition rate of control soybean sprouts (germanium non-treated soybean sprouts, GNTS) in the Ames test. Also, methanol extracts from GTS inhibited 65% mutagenicity induced by AFB$_1$ in Salmonella typhimurium TA100, and 51% mutagenicity by 4-NQO in SOS chromotest. Therefore, it suggests that GTS has strong potential antimutagenic effect.

Mutagenic Activity by Ames Test of Bracken Grown in Korea (고사리의 돌연변이(突然變異) 유발성(誘發性))

  • Yoon, Jae-Young;Lee, Su-Rae
    • Korean Journal of Food Science and Technology
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    • v.20 no.4
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    • pp.558-562
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    • 1988
  • The ethanol-and water-extracts of curled tops and stalks of young bracken (Pteridium aquilinum) fronds in raw and cooked states were examined for their mutagenicity by Ames test using Salmonella typhymurium mutants. Even a small amount of water extract from raw bracken was mutagenic to TA 1538 strain without addition of $S_9$ mix whereas a strong toxicity appeared at higher levels of the extractive. With $S_9$ mix, the water-extract from raw bracken was not mutagenic at all and not toxic to all strains tested, The amount of water-extract from cooked bracken was one-tenth of the amount from raw bracken and the water-extract showed no mutagenic effect to all strains tested. Ethanol-extract of bracken showed no mutagenicity in any case.

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Mutagenicity studies of food and cosmetic dyes (1) (식용 및 외용색소의 유전독성에 관한 연구 (1))

  • 하광원;정해관;오혜영;허옥순;손수정;한의식;정성철;한순영;최선주
    • Journal of Food Hygiene and Safety
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    • v.8 no.3
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    • pp.171-179
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    • 1993
  • The mutagenicity of 22 food and cosmetic dyes had been evaluated. Two different short-term mutagenicity tests were used: (1) Salmonella typhimurium preincubation assay (Ames test) (2) Chromosome aberration test with cultured Chinese hamster lung (CHL) fibroblast cells. Orange No. 203 was mutagenic in Salmonella typhimurium with and without rat liver microsomal activation, and Red No. 204 was mutagenic in Salmonelhl typhimurium with rat liver microsomal activation. Red No. 104-1 and Red No. 215 showed slight increase of chromosomal aberration in CHL cells.

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The Evaluation of Genotoxicities of Antifungal 6-[(N-Halophenyl)amino]-7- Chlore-5,8-Quinolinediones (항진균성 6-[(N-Halophenyl)amino]-7-Chloro-5, 8-Quinolinedione의 유전독성 평가)

  • 유충규;허문영;박윤미;윤여표
    • Biomolecules & Therapeutics
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    • v.3 no.3
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    • pp.182-187
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    • 1995
  • The clastogenecity and mutagenicity of antifungal 6-[(N-halophenyl)amino]-7-chloro-5, 8-quinolinedione (RCK 3, 7, 13, 14, and 15) had been evaluated. Salmonella typhimurium reversion assay (Ames test) was used to test the mutagenicity of RCKs. RCK14 was mutagenic in S. typhimurium(TA98 and TA100) with and without rat liver microsomal activation. Whereas RCK3, 7, 13 and 15 were negative in Ames test with Salmonella typhimurium(TA98 and TA100), The clastogenecity was tested on the RCKs with in vivo mouse micronucleus assay. All of RCKs tested did not show any clastogenic effect in mouse peripheral blood. Thus RCKs were not supposed to cause any chromosomal damage termed micronuclei. These results indicate that RCK 3, 7, 13 and 15 have no genotoxic potential under these experimental condition.

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Antimutagenic Activity of Asterina pectinifera (별불가사리의 항돌연변이 활성)

  • 함정혜;한영환;박창훈;이동웅
    • YAKHAK HOEJI
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    • v.43 no.6
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    • pp.771-775
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    • 1999
  • The antimutagenic activities of the total extract and several fractions of starfish, Asterina pectinifera (Asteriidae), were investigated in vitro by SOS chromotest with Escherichia coli PQ37 and Ames test with Salmonella typhimurium TA100. When various fractions was tested, the chloroform and butanol fractions showed low induction factors, which means both fractions increased antigenotoxicity against the base substitution mutagen MNNG. Even though higher antigenotoxic effect of the chloroform fraction, no effective result of Ames test was found in revertant formation of S. typhimurium TA100. The most effective antigenotoxic and antimutagenic fraction was a butanol one: i.e., When 0.5 mg/tube of butanol fraction was applied, the induction factor was 0.68. As the concentration of the fraction was increased the formation of revertants of S. typhimurium TA100 by about 81%. There was no cytotoxic effect of butanol fraction against S.typhimurium TA100. This result might be useful for further study to search a possible anticancer agent from the starfish, Asterina pectinifera.

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Antimutagenic Effects of Enzymatic Browning Reaction Products of polyphenol Compounds by polyphenoloxidase derived from Mushroom(Agaricus bisporus) (양송이 유래 Polyphenoloxidase에 의한 Polyphenol 화합물의 효소적 갈변생성물의 돌연변이 억제효과)

  • Oh, Heung-Seok;Ham, Seung-Si
    • Korean Journal of Food Science and Technology
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    • v.24 no.4
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    • pp.341-346
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    • 1992
  • The antimutagenic effects of enzymatic browning reaction products (MEBRPs) of polyphenol compounds (catechol, homocatechol, hydroxyhydroquinone, pyrogallol) by enzyme extracted from mushroom (Agaricus bisporus) were demonstrated through spore rec-assay using B. subtilis $H17(rec^+)$ and $M45(rec^-)$, Ames test using S. typhimurium TA98 and TA100 and SOS chromotest using E. coli PQ37/plasmid pKM101. In spore rec-assay, the MEBRPs showed antimutagenic effects by decreasing of the inhibition zone induced by MNNG. In Ames test with S-9mix in both TA98 and TA100, all of MEBRPs showed strong antimutagenic effects of about 21 to 99% against mutation by $B({\alpha})P$ and Trp-P-1, as adding $300\;{\mu}l$ of the MEBRPs. In SOS chromotest, MEBRPs showed antimutagenic effects by inhibiting the SOS-inducing function induced by 4NQO and MMC, as increasing in concentration of the MEBRPs. But they did not showed mutagenicity in these bacterial assays.

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STUDIES ON ENHANCING CHEMOPREVENTIVE EFFECT OF CHUNGKOOKJANGS 1. ENHANCED ANTIMUTAGENIC ACTIVITY OF CHUNGKOOKJANGS PREPARED WITH THE DIFFERENT VARIETY OF SOYBEAN AND STARTER

  • Park, Kun-Young;Kwon, Eun-Young;Jung, Keun-Ok
    • Proceedings of the Korean Society of Toxicology Conference
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    • pp.99-99
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    • 2001
  • Antimutagenic effect of chungkookjangs prepared with the different variety of soybean and starter were studied against aflatoxin B$_1$ (AFB1) using Ames test and Ν-methyl-Ν'-nitro-Ν- nitrosoguanidine (MNNG) using SOS chromotest. Chungkookjang samples exerted the different antimutagenicity according to the prepared variety of soybeans in the Ames test using Salmonella typhimurium TA100. The chungkookjang manufactured with var.(omitted)

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