ArticleHeliyon2024
The highly hazardous veterinary drug "maduramicin" and its toxicokinetics in rats.
Article in Heliyon, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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8 authors.
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Abstract
Background: Maduramicin (MAD) is an anticoccidial veterinary drug, but it frequently causes fatal poisonings in poultry, livestock, or humans. However, there is no specific antidote or guidance on first aid for MAD poisoning. Aim: The aim of the present study is to evaluate the acute toxicity and toxicokinetics of MAD after oral exposure, so as to make a foundation for developing diagnostic and therapeutic protocols for human intoxication. Methods: Five groups of rats (eight-to-nine-week-old male Wistar rats) were orally administered MAD via gavage at doses of 0, 4.64, 10.0, 21.5, or 46.4 mg/kg bw for only one time. The survival rates of the rats were observed over the following 14 days to assess acute toxicity. To evaluate the toxic effects of MAD, two doses (4.8 mg/kg bw and 10 mg/kg bw) were orally administered via gavage. Biochemical parameters including creatine kinase, lactate dehydrogenase, aspartate aminotransferase, alanine aminotransferase, urea, creatinine, serum myoglobin, and urinary myoglobin were measured. Liver, kidney, heart, and hind limb skeletal muscle samples from severely poisoned rats were obtained for pathological examination. For toxicokinetic analysis, samples of serum, urine, and feces from the 4.8 mg/kg bw dose group were analyzed using high-performance liquid chromatography-tandem mass spectrometry. Results: The LD50 of MAD in male Wistar rats was determined to be 6.81 mg/kg bw. In the 10 mg/kg bw group, elevated serum urea levels and increased myoglobin levels in both serum and urine indicated renal injury and potential muscle damage. Toxicokinetics in serum revealed that following oral administration of 4.8 mg/kg bw MAD, peak serum concentration of 59.8 ± 8.9 μg/L was achieved at 30.0 ± 13.9 h. MAD exhibited a slow elimination from the blood with an elimination half-life of 72.9 ± 36.8 h and a mean residence time of 79.6 ± 25.5 h. Additionally, fecal excretion of MAD was found to be greater than urinary excretion. Conclusion: MAD is a highly toxic veterinary drug which requires careful handling. The primary effects of poisoning include kidney injury and suspected rhabdomyolysis. It is excreted very slowly after oral administration. Promoting toxin excretion in individuals poisoned by MAD could potentially serve as an effective treatment method until a specific antidote is identified.
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