Study on Toxicity of Nitroquine-Dapson Compound & Its Treatment with Folic Acid or Folinic Acid in Mice and Dogs / 第三军医大学学报

ABSTRACT

The toxic effects of nitroquine-dapson compound(NQD) per os in mice and dogs were studied. The therapeutic index of NQD in mice(1911) is the highest among the six antimalarial preparations studied. The toxic effects(50mg/kg/ day for 3 successive days per os) in dogs were similar to those of nitroquine. They manifested themselves as the injury on the adrenal cortex and on the intestinal epithelium. When folic acid (4 mg/kg/day for 4 successive days) or folinic acid(0.3 mg/kg/day for 4 successive days) was administered intramuscularly to the toxicated animals, both the death rate and the incidence of diarrhea were greatly reduced. Pathological study confirmed that the injury on the intestinal epithelium was much milder and the goblet cell was much more numerous in the treated than in the untreated. The results suggest that folic acid or folinic acid can protect the less differentiated cells in the intestinal crypts, so that the clinical manifestations of NQD toxicity are reduced after treatment.