title: Oral toxicological studies of black soybean (Glycine max) hull extract: acute studies in rats and mice, and chronic studies in mice.
abstract: Black soybean (Glycine max) has been used for traditional medicine and food in Asian countries, but safety of its hull has not been studied. We conducted acute and chronic oral toxicity studies. For the acute study, an extract of black soybean hull (BE; 2.5 g/kg body weight) was administered singly by intragastric intubation to Sprague-Dawley rats and C57BL/6 mice. There was no death or significant decrease in body weight in rats and mice, and the oral LD(50) of BE was >2.5 g/kg body weight. In the chronic study, BE was administered at dietary levels of 0% (control), 2.0%, and 5.0% to male and female C57BL/6 mice for 26 weeks. No mortality or toxicologically significant clinical changes were observed through the experimental period. Although body weights, as well as abdominal fat, blood levels of triglyceride and total cholesterol in 5.0% males were significantly lower than that in control and 2.0% groups, these changes were considered not to be adverse. Hematology and histopathological observation revealed no toxicologically significant changes. The no-observed adverse-effect-level of BE was estimated to be 5.0% in the diet (5074.1 mg/kg body weight/day for males and 7617.9 mg/kg body weight/day for females).
authors: Research Center for Food Safety and Security, Graduate School of Agricultural Science, Kobe University, 1-1 Rokkodai-cho, Nada-ku, Kobe, Hyogo 657-8501, Japan. itsuko@silver.kobe-u.ac.jp
authors: Itsuko
authors: I
authors: Fukuda
authors: Miki
authors: M
authors: Tsutsui
authors: Tadashi
authors: T
authors: Yoshida
authors: Toshiya
authors: T
authors: Toda
authors: Takanori
authors: T
authors: Tsuda
authors: Hitoshi
authors: H
authors: Ashida
mesh_terms: D000284:Administration, Oral; D000818:Animals; D001208:Asia; D001835:Body Weight / Q000187:drug effects; D004305:Dose-Response Relationship, Drug; D005260:Female; D007928:Lethal Dose 50; D008297:Male; D051379:Mice; D008810:Mice, Inbred C57BL; D019055:No-Observed-Adverse-Effect Level; D009929:Organ Size / Q000187:drug effects; D010936:Plant Extracts / Q000633:toxicity*; D051381:Rats; D017207:Rats, Sprague-Dawley; D013025:Glycine max / Q000737:chemistry / Q000633:toxicity*; D023382:Toxicity Tests, Acute / Q000379:methods*; D036401:Toxicity Tests, Chronic / Q000379:methods*
chemical_list: D010936:Plant Extracts