Related Experiment Videos
Short-term toxicity study of 4-dimethylaminoazobenzene in marmosets
Abstract:
The marmoset, a small non-human primate, has rarely been used in toxicological studies. A short-term toxicity study was performed on common marmosets (BW = 330 +/- 32 g). Fifteen male marmosets received oral administration of DAB at a dose level of 56 mg/kg/day and 4 control animals received corn oil alone for a period of 15 days. Hematological, biochemical, histopathological and bone marrow examinations were carried out on the 5th, 10th and 15th day of treatment. Body weight decreased continuously and two animals died on day 10. Decreases in RBC, Hb and Ht and increases in MCV and WBC were observed. Uric acid and glucose were increased and AlP and LAP were decreased. Aldolase, GOT and GPT were increased by day 10, and thereafter recovery of aldolase to the control level and decreases of GOT and GPT were observed. Relative organ weights of the liver, kidney, spleen and adrenal were increased. Histologically, C-cell hyperplasia of the thyroid and slight changes of the liver were noted. Marrow total cell counts were not changed, but the G/E ratio was reduced. Thus, macrocytic anemia, an increase of marrow erythroblasts due to anemia and changes of biochemical parameters indicating liver injury were observed in marmosets; these findings were similar to those in rats in the previous experiments.
Insights
This study investigated the toxicity of DAB in marmosets, revealing macrocytic anemia and liver injury. Findings in these non-human primates align with previous rat toxicity studies.
Area of Science:
- Toxicology
- Primate research
- Non-human primate models
Background:
- Marmosets are rarely utilized in toxicological research.
- This study explores the toxicological profile of DAB in marmosets.
Purpose of the Study:
- To assess the short-term toxicity of DAB in common marmosets.
- To compare marmoset toxicity data with previous rat studies.
Main Methods:
- Oral administration of DAB (56 mg/kg/day) to 15 male marmosets for 15 days.
- Hematological, biochemical, histopathological, and bone marrow examinations.
- Monitoring of body weight, mortality, and organ weights.
Main Results:
- DAB administration led to decreased body weight, mortality in two animals, and macrocytic anemia (decreased RBC, Hb, Ht; increased MCV).
- Biochemical changes included increased uric acid and glucose, decreased AlP and LAP, and transient increases in aldolase, GOT, and GPT.
- Histological findings revealed C-cell hyperplasia of the thyroid and slight liver changes, with a reduced G/E ratio in bone marrow.
Conclusions:
- Marmosets exhibited macrocytic anemia and biochemical indicators of liver injury following DAB exposure.
- The observed toxicological effects in marmosets were comparable to those previously reported in rats.