Subchronic toxicity evaluation of aloesin |
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Authors: | Lynch Barry Simon Ryan Roberts Ashley |
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Affiliation: | Cantox Health Sciences International, An Intertek Company, 2233 Argentia Road, Suite 308, Mississauga, ON, Canada L5N 2X7 |
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Abstract: | Aloesin, an aromatic chromone present in various Aloe species, shows potential beneficial effects on indices related to pre-diabetic states, including metabolic syndrome. Aloesin may have utility as a functional food ingredient. As part of a program to assess its safety, aloesin was administered by oral gavage at doses of 250, 500, and 1000 mg/kg body weight/day to groups of 10 male and 10 female Sprague-Dawley rats for 90 days. Treatment was not associated with mortality and appeared to be well tolerated. There were no toxicologically or statistically significant changes in body weight gain or in feed and water consumption. A few statistically significant changes in serum biochemistry and hematology parameters were noted, but all were mild in nature, were confined to one sex, and/or did not show dose–response relationships. Urinalysis revealed dose-dependent increases in urinary ketones. This result was due to the presence of aloesin, which possesses ketone functionalities, in the urine and not due to a systemic effect. There was no effect of treatment on organ weights or on the results of the histopathological examinations. The no-observed-adverse-effect level was considered to be 1000 mg/kg body weight/day, the highest dose tested. The results support potential use of aloesin as a functional food ingredient. |
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Keywords: | Abbreviations: NOAEL, no-observed-adverse-effect level HPLC, high-performance liquid chromatography GLP, good laboratory practice PT, prothrombin time APTT, activated partial thromboplastin time ANOVA, one-way analysis of variance OGTT, oral glucose tolerance test WBC, white blood cell |
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