Acute Toxicity Evaluation of Lemon Grass (Cymbopogon citratus) Essential Oil in Rats

랫드에서 레몬그라스(Cymbopogon citratus) 정유의 급성독성 평가

Shin, Jin-Young;Park, Seung-Chun;Kim, Ki-Hyun;Bae, Chun-Sik;Kim, Sung-Ho;Shin, Dong-Ho;Kim, Jong-Choon
신진영;박승춘;김기현;배춘식;김성호;신동호;김종춘

  • Published : 20050600

Abstract

The present study was conducted to determine the potential acute toxicity of lemon grass (Cymbopogon citratus) essential oil by a single oral dose in Sprague-Dawley rats. The test article was orally administered once by gavage to male and female rats at dose levels of 0, 2,500, 5,000 or 10,000 mg/kg body weight. Mortalities, clinical findings, and body weight changes were monitored for the 14-day period following the administration. At the end of 14-day observation period, all animals were sacrificed and complete gross postmortem and histopathological examinations were performed. Treatment-related toxic symptoms were observed at above 5,000 mg/kg in a dose-dependent manner. Two males and 5 females at 10,000 mg/kg were found dead from treatment day through day 9 on test. In addition, decreased body weight gain and increased incidences of gross findings, such as enlargement, brittleness and adhesion with spleen and stomach in the liver and enlargement in the spleen were seen at 5,000 mg/kg or higher. Histopathological examinations showed an increased incidence of congestion, dilated sinusoid, infiltration of mononucleated cells, proliferation of connective tissue and degeneration of hepatocytes in the liver at above 5,000 mg/kg. No adverse effects were found at 2,500 mg/kg. The results showed that the single oral administration of lemon grass essential oil to rats caused increased incidences of clinical signs and death, suppressed body weight gain, and increased incidences of gross and histopathological changes in liver and spleen. The median lethal dose (L$D_{50}$) of lemon grass essential oil was considered to be 10,260 mg/kg for males and 7,063 mg/kg for females.

Keywords

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