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Acute Toxicity of Leuconostoc citreum GJ7 Isolated from Kimchi in Mice

김치로부터 분리한 Leuconostoc citreum GJ7의 마우스에 대한 급성독성

  • Published : 2007.05.30

Abstract

The present study was carried out to investigate the potential acute toxicity of Leuconostoc citreum GJ7 (Leu. citreum GJ7), a lactic acid bacterium isolated from Kimchi, in ICR male and female mice. The test article was administered to the mice orally or intraperitoneally. Mortality rates, clinical findings, and body weight changes were monitored for the 2 weeks following administration. The results showed that in 50% of the cases, lethal doses ($LD_{50}$) of Leu. citreum GJ7 were determined as >5, 000 mg/kg (p.o.) and >2500 mg/kg (i.p.) in both sexes. There were no significant changes in general conditions, body weights clinical signs and any gross lesions between vehicle control and Leu. citreum GJ7-treated groups. Hence, it is suggested that Leu. citreum GJ7 does not induce any significant acute toxicity in ICR mice.

본 연구는 김치로 분리한 우량 종균인 Leu. citreum GJ7의 급성독성을 시험하기 위하여 ICR 마우스에게 1회 Leu. citreum GJ7을 복강 또는 경구투여한 후 사망률, 체중의 변화, 일반 및 임상증상, 육안적 소견 등을 관찰하였다. 복강투여 후 24시간 관찰한 결과, 일부 Leu. citreum GJ7 투여군에서 부분적으로 사망례가 관찰은 되었으나 나머지 시험동물은 계속 생존하여 2,500 mg/kg까지는 평균치사량을 산출할 수 없었다. 또한 5,000 mg/kg을 14일 동안 경구투여하였을 경우에는 사망례가 없었으며, 특이한 임상증상도 관찰되지 않았다. 복강 혹은 경구투여한 후 마우스의 체중변화에 있어서도 대조군과 Leu. citreum GJ7 투여군 사이에 유의성 있는 차이는 보이지 않았으며, 생존동물의 부검결과에서도 내부 장기의 육안적 이상이 관찰되지 않았다. 따라서 Leu. citreum GJ7은 본 실험의 모든 조건에서 $LD_{50}$이 복강투여 시 2,500 mg/kg, 경구투여 시 5,000 mg/kg 이상인 저독성의 안전한 물질로 사료된다.

Keywords

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