Journal of Applied Biological Chemistry

The Korean Society for Applied Biological Chemistry (한국응용생명화학회)
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In vitro Antimutagenic and Genotoxic Effects of Azadirachta indica Extract

님추출물의 in vitro 항돌연변이원성 및 유전독성 영향

  • Yoon, Hyunjoo (Chemical Safety Division, National Academy of Agricultural Sciences, Rural Development Administration) ;
  • Cho, Hyeon-Jo (Chemical Safety Division, National Academy of Agricultural Sciences, Rural Development Administration) ;
  • Kim, Jin Hyo (Chemical Safety Division, National Academy of Agricultural Sciences, Rural Development Administration) ;
  • Park, Kyung-Hun (Chemical Safety Division, National Academy of Agricultural Sciences, Rural Development Administration) ;
  • Gil, Geun-Hwan (Agro-Material Safety Evaluation Division, National Academy of Agricultural Sciences, Rural Development Administration) ;
  • Oh, Jin-Ah (Chemical Safety Division, National Academy of Agricultural Sciences, Rural Development Administration) ;
  • Cho, Namjun (Chemical Safety Division, National Academy of Agricultural Sciences, Rural Development Administration) ;
  • Paik, Min-Kyoung (Chemical Safety Division, National Academy of Agricultural Sciences, Rural Development Administration)
  • Received : 2013.10.21
  • Accepted : 2014.02.07
  • Published : 2014.09.30
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Abstract

Azadirachta indica extract (AIE) has been regarded as a promising source of environment-friendly organic materials owing to their low mammalian toxicity. However, quite a bit of research has been reported that AIE may cause clastogens in human lymphocytes. Therefore, this study was conducted to evaluate the antimutagenic and genotoxicity of two samples of AIE. Antimutagenic test was experimented by using bacterial reverse mutation test. In the bacterial reverse mutation test, five strains Salmonella Typhimurim of two samples of AIE in order to evaluate its mutagenic potential. Bacterial reverse mutation test was also performed on positive control and negative control groups in the presence of the metabolic activation system (S-9 mix) and metabolic non-activation system. In the chromosome aberration test, Chinese hamster lung cells were exposed to AIE for 6 or 24 h with BPS, or for 6 h with S-9 mix. Negative and positive control groups were experimented for chromosome aberration test. As a result, the number of mutated colonies induced by 4-NQO were reduced by AIE treatment in all strains, indicating that AIE may have antimutagenic effects. Bacterial reverse mutation and chromosomal aberration were not shown at all concentration of AIE, regardless of activation of the metabolic system. we concluded that two AIE samples used in this study have no genotoxic effects to human, according to the genotoxicity battery system suggested by ICH (International Conference on Harmonization).

님 추출물은 포유류에 낮은 독성을 가지고 있기 때문에 유기농업자재로 주로 이용되고 있다. 그러나 님 추출물은 림프구의 염색체 이상을 야기한다는 연구결과가 보고되었다. 따라서, 본 연구는 님 추출물을 이용하여 항돌연변이원성 시험 및 유전독성을 평가하였다. 항돌연변이원성 시험은 복귀돌연변이 시험을 이용하여 시험하였다. 복귀돌연변이 시험은 2개의 님 추출물을 Salmonella Typhimurium 5개 균주를 이용하여 돌연변이 유발 가능성을 평가하였다. 복귀돌연변이시험과 염색체이상시험은은 대사활성계 처리군(S-9 mix)과 대사활성계 미처리군(PBS)으로 나누어 양성대조군과 음성대조군을 사용하여 실시하였다. 염색체이상시험은 Chinese hamster lung cell을 이용하여 님추출물 시료에 대사활성계 처리군은 6시간 노출시켰고, 대사활성계 미처리군은 각각 6시간과 24시간 노출시켜 시험하였고, 음성대조군과 양성대조군을 사용하였다. 4 NQO에 의해 유도 된 돌연변이 집락수는 님추출물 시료 처리에 의해 감소되어 SRE는 항 돌연변이 효과가 있을 수 있음을 나타냈다. 복귀돌연변이와 염색체이상시험은 님추출물 모든 시험 농도군에서 대화활성계의 처리 유무와 관계없이 음성으로 판정되었다. 이상의 결과를 ICH에서 제안된 유전독성 battery system에 근거해 살펴 봤을 때 본 연구에서 사용된 님 추출물 2종은 모두 유전독성이 없어 안전함을 확인 할 수 있었다.

Keywords

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