Study on a Single-Dose Toxicity Test of D-Amino Acid Oxidase (DAAO) Extracts Injected into the Tail Vein of Rats

• Main Authors: Kang Jungue, Lee Eun-yong, Song Bong-Keun, Lee Seung-Deok, Yook Tae-Han, Ahn Seong-Hun, Son Il-Hong, Kim Sungchul
• Format: Article
• Language: English
• Published: Korean Pharmacopuncture Institute 2013-06-01
• Series: Journal of Pharmacopuncture
• Subjects: D-amino acid oxidase; DAO; single-dose toxicity; toxicity test; LD50; injection
• Online Access: http://dx.doi.org/10.3831/KPI.2013.16.012
• ISSN: 2093-6966; 2234-6856

Objective: This study was performed to analyze the single-dose toxicity of D-amino acid oxidase (DAAO) extracts. Methods: All experiments were conducted at the Korea Testing & Research Institute (KTR), an institution authorized to perform non-clinical studies, under the regulations of Good Laboratory Practice (GLP). Sprague-Dawley rats were chosen for the pilot study. Doses of DAAO extracts, 0.1 to 0.3 cc, were administered to the experimental group, and the same doses of normal saline solution were administered to the control group. This study was conducted under the approval of the Institutional Animal Ethics Committee. Results: In all 4 groups, no deaths occurred, and the LD50 of DAAO extracts administered by IV was over 0.3 ml/kg. No significant changes in the weight between the control group and the experimental group were observed. To check for abnormalities in organs and tissues, we used microscopy to examine representative histological sections of each specified organ, the results showed no significant differences in any organs or tissues. Conclusion: The above findings suggest that treatment with D-amino acid oxidase extracts is relatively safe. Further studies on this subject should be conducted to yield more concrete evidence.