Subchronic Oral Dose Toxicity Study of Enterococcus Faecalis 2001 (EF 2001) in Mice
| Autor: | Takenori Yamasita, Yeunhwa Gu, Ki-Mun Kang |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
0301 basic medicine
Organ weight Survival rate Urinalysis Health Toxicology and Mutagenesis 030106 microbiology Physiology Toxicology Enterococcus faecalis Blood cell 03 medical and health sciences Oral administration medicine Blood test Dose toxicity study Enterococcus Faecalis 2001 medicine.diagnostic_test biology business.industry Lethal dose Body weight biology.organism_classification 030104 developmental biology medicine.anatomical_structure Toxicity Original Article Blood biochemistry business |
| Zdroj: | Toxicological Research |
| ISSN: | 2234-2753 1976-8257 |
| Popis: | As a part of general toxicity studies of Enterococcus Faecalis 2001 (EF 2001) prepared using heat-treatment bacillus mort body EF 2001 in mice, this study examined the toxicity of EF 2001 in single and repeated administrations following the previous report in order to apply this product to preventive medicine. The safety of oral ingestion of EF 2001 was examined in 6-week-old male and female ICR mice with 1,000 mg/kg, 3,000 mg/kg and 5,000 mg/kg body weight/day administrated by gavage of the maximum acceptable dose of EF 2001. The study was conducted using distilled water as a control following the methods for general toxicity studies described in the “Guidelines for Non-clinical Studies of Pharmaceutical Products 2002”. As a control, 1) observation of general conditions, 2) measurement of body weight, 3) determination of food consumption, 4) determination of water consumption, 5) blood test and urinalysis and 6) pathological examination were performed for the administration of EF 2001. Mice received EF 2001 for 13 weeks and results were compared with those of the control group that received distilled water. The results of the above examinations revealed no significant differences between control and EF 2001 groups for both males and females. Thus, no notable toxicity was confirmed with single and repeated oral administrations of EF 2001. Oral administration in the above doses did not result in abnormal symptoms or death during the observation period. No abnormalities in blood cell count or organ weights were seen. Without any evidence of toxicity to cells and organs, EF 2001 is speculated to not adversely affect living organisms. The 50% lethal dose of EF 2001 with oral administration in mice is estimated to be greater than 5,000 mg/kg body weight/day for both male and female mice. Therefore, LD50 value for animals was 5,000 mg/kg or more. |
| Databáze: | OpenAIRE |
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